1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
|
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html><head><title>QGraphicsItem Class Reference</title><style>h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm }
a:link { color: #004faf; text-decoration: none }
a:visited { color: #672967; text-decoration: none }
td.postheader { font-family: sans-serif }
tr.address { font-family: sans-serif }
body { background: #ffffff; color: black; }
</style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">  </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QGraphicsItem Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1><p>The QGraphicsItem class is the base class for all graphical
items in a <a href="qgraphicsscene.html">QGraphicsScene</a>.
<a href="#details">More...</a></p>
<p>Inherited by <a href="qabstractgraphicsshapeitem.html">QAbstractGraphicsShapeItem</a>, <a href="qgraphicsitemgroup.html">QGraphicsItemGroup</a>, <a href="qgraphicslineitem.html">QGraphicsLineItem</a>, <a href="qgraphicsobject.html">QGraphicsObject</a> and <a href="qgraphicspixmapitem.html">QGraphicsPixmapItem</a>.</p><h3>Types</h3><ul><li><div class="fn" />enum <b><a href="qgraphicsitem.html#CacheMode-enum">CacheMode</a></b> { NoCache, ItemCoordinateCache, DeviceCoordinateCache }</li><li><div class="fn" />enum <b><a href="qgraphicsitem.html#GraphicsItemChange-enum">GraphicsItemChange</a></b> { ItemPositionChange, ItemMatrixChange, ItemVisibleChange, ItemEnabledChange, ..., ItemTransformOriginPointHasChanged }</li><li><div class="fn" />enum <b><a href="qgraphicsitem.html#GraphicsItemFlag-enum">GraphicsItemFlag</a></b> { ItemIsMovable, ItemIsSelectable, ItemIsFocusable, ItemClipsToShape, ..., ItemSendsScenePositionChanges }</li><li><div class="fn" />class <b><a href="qgraphicsitem-graphicsitemflags.html">GraphicsItemFlags</a></b></li><li><div class="fn" />enum <b><a href="qgraphicsitem.html#PanelModality-enum">PanelModality</a></b> { NonModal, PanelModal, SceneModal }</li></ul><h3>Methods</h3><ul><li><div class="fn" /><b><a href="qgraphicsitem.html#QGraphicsItem">__init__</a></b> (<i>self</i>, QGraphicsItem <i>parent</i> = None, QGraphicsScene <i>scene</i> = None)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#acceptDrops">acceptDrops</a></b> (<i>self</i>)</li><li><div class="fn" />Qt.MouseButtons <b><a href="qgraphicsitem.html#acceptedMouseButtons">acceptedMouseButtons</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#acceptHoverEvents">acceptHoverEvents</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#acceptsHoverEvents">acceptsHoverEvents</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#acceptTouchEvents">acceptTouchEvents</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#advance">advance</a></b> (<i>self</i>, int <i>phase</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#boundingRect">boundingRect</a></b> (<i>self</i>)</li><li><div class="fn" />QRegion <b><a href="qgraphicsitem.html#boundingRegion">boundingRegion</a></b> (<i>self</i>, QTransform <i>itemToDeviceTransform</i>)</li><li><div class="fn" />float <b><a href="qgraphicsitem.html#boundingRegionGranularity">boundingRegionGranularity</a></b> (<i>self</i>)</li><li><div class="fn" />CacheMode <b><a href="qgraphicsitem.html#cacheMode">cacheMode</a></b> (<i>self</i>)</li><li><div class="fn" />unknown-type <b><a href="qgraphicsitem.html#childItems">childItems</a></b> (<i>self</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#childrenBoundingRect">childrenBoundingRect</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#clearFocus">clearFocus</a></b> (<i>self</i>)</li><li><div class="fn" />QPainterPath <b><a href="qgraphicsitem.html#clipPath">clipPath</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#collidesWithItem">collidesWithItem</a></b> (<i>self</i>, QGraphicsItem <i>other</i>, Qt.ItemSelectionMode <i>mode</i> = Qt.IntersectsItemShape)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#collidesWithPath">collidesWithPath</a></b> (<i>self</i>, QPainterPath <i>path</i>, Qt.ItemSelectionMode <i>mode</i> = Qt.IntersectsItemShape)</li><li><div class="fn" />unknown-type <b><a href="qgraphicsitem.html#collidingItems">collidingItems</a></b> (<i>self</i>, Qt.ItemSelectionMode <i>mode</i> = Qt.IntersectsItemShape)</li><li><div class="fn" />QGraphicsItem <b><a href="qgraphicsitem.html#commonAncestorItem">commonAncestorItem</a></b> (<i>self</i>, QGraphicsItem <i>other</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#contains">contains</a></b> (<i>self</i>, QPointF <i>point</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#contextMenuEvent">contextMenuEvent</a></b> (<i>self</i>, QGraphicsSceneContextMenuEvent <i>event</i>)</li><li><div class="fn" />QCursor <b><a href="qgraphicsitem.html#cursor">cursor</a></b> (<i>self</i>)</li><li><div class="fn" />QVariant <b><a href="qgraphicsitem.html#data">data</a></b> (<i>self</i>, int <i>key</i>)</li><li><div class="fn" />QTransform <b><a href="qgraphicsitem.html#deviceTransform">deviceTransform</a></b> (<i>self</i>, QTransform <i>viewportTransform</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#dragEnterEvent">dragEnterEvent</a></b> (<i>self</i>, QGraphicsSceneDragDropEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#dragLeaveEvent">dragLeaveEvent</a></b> (<i>self</i>, QGraphicsSceneDragDropEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#dragMoveEvent">dragMoveEvent</a></b> (<i>self</i>, QGraphicsSceneDragDropEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#dropEvent">dropEvent</a></b> (<i>self</i>, QGraphicsSceneDragDropEvent <i>event</i>)</li><li><div class="fn" />float <b><a href="qgraphicsitem.html#effectiveOpacity">effectiveOpacity</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#ensureVisible">ensureVisible</a></b> (<i>self</i>, QRectF <i>rect</i> = QRectF(), int <i>xMargin</i> = 50, int <i>yMargin</i> = 50)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#ensureVisible-2">ensureVisible</a></b> (<i>self</i>, float <i>x</i>, float <i>y</i>, float <i>w</i>, float <i>h</i>, int <i>xMargin</i> = 50, int <i>yMargin</i> = 50)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#filtersChildEvents">filtersChildEvents</a></b> (<i>self</i>)</li><li><div class="fn" />GraphicsItemFlags <b><a href="qgraphicsitem.html#flags">flags</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#focusInEvent">focusInEvent</a></b> (<i>self</i>, QFocusEvent <i>event</i>)</li><li><div class="fn" />QGraphicsItem <b><a href="qgraphicsitem.html#focusItem">focusItem</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#focusOutEvent">focusOutEvent</a></b> (<i>self</i>, QFocusEvent <i>event</i>)</li><li><div class="fn" />QGraphicsItem <b><a href="qgraphicsitem.html#focusProxy">focusProxy</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#grabKeyboard">grabKeyboard</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#grabMouse">grabMouse</a></b> (<i>self</i>)</li><li><div class="fn" />QGraphicsEffect <b><a href="qgraphicsitem.html#graphicsEffect">graphicsEffect</a></b> (<i>self</i>)</li><li><div class="fn" />QGraphicsItemGroup <b><a href="qgraphicsitem.html#group">group</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#handlesChildEvents">handlesChildEvents</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#hasCursor">hasCursor</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#hasFocus">hasFocus</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#hide">hide</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#hoverEnterEvent">hoverEnterEvent</a></b> (<i>self</i>, QGraphicsSceneHoverEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#hoverLeaveEvent">hoverLeaveEvent</a></b> (<i>self</i>, QGraphicsSceneHoverEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#hoverMoveEvent">hoverMoveEvent</a></b> (<i>self</i>, QGraphicsSceneHoverEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#inputMethodEvent">inputMethodEvent</a></b> (<i>self</i>, QInputMethodEvent <i>event</i>)</li><li><div class="fn" />Qt.InputMethodHints <b><a href="qgraphicsitem.html#inputMethodHints">inputMethodHints</a></b> (<i>self</i>)</li><li><div class="fn" />QVariant <b><a href="qgraphicsitem.html#inputMethodQuery">inputMethodQuery</a></b> (<i>self</i>, Qt.InputMethodQuery <i>query</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#installSceneEventFilter">installSceneEventFilter</a></b> (<i>self</i>, QGraphicsItem <i>filterItem</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isActive">isActive</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isAncestorOf">isAncestorOf</a></b> (<i>self</i>, QGraphicsItem <i>child</i>)</li><li><div class="fn" />(bool, QGraphicsItem <i>blockingPanel</i>) <b><a href="qgraphicsitem.html#isBlockedByModalPanel">isBlockedByModalPanel</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isClipped">isClipped</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isEnabled">isEnabled</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isObscured">isObscured</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isObscured-2">isObscured</a></b> (<i>self</i>, QRectF <i>rect</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isObscured-3">isObscured</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isObscuredBy">isObscuredBy</a></b> (<i>self</i>, QGraphicsItem <i>item</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isPanel">isPanel</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isSelected">isSelected</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isUnderMouse">isUnderMouse</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isVisible">isVisible</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isVisibleTo">isVisibleTo</a></b> (<i>self</i>, QGraphicsItem <i>parent</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isWidget">isWidget</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#isWindow">isWindow</a></b> (<i>self</i>)</li><li><div class="fn" />QVariant <b><a href="qgraphicsitem.html#itemChange">itemChange</a></b> (<i>self</i>, GraphicsItemChange <i>change</i>, QVariant <i>value</i>)</li><li><div class="fn" />(QTransform, bool <i>ok</i>) <b><a href="qgraphicsitem.html#itemTransform">itemTransform</a></b> (<i>self</i>, QGraphicsItem <i>other</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#keyPressEvent">keyPressEvent</a></b> (<i>self</i>, QKeyEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#keyReleaseEvent">keyReleaseEvent</a></b> (<i>self</i>, QKeyEvent <i>event</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapFromItem">mapFromItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QPointF <i>point</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapFromItem-2">mapFromItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapFromItem-3">mapFromItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QPolygonF <i>polygon</i>)</li><li><div class="fn" />QPainterPath <b><a href="qgraphicsitem.html#mapFromItem-4">mapFromItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QPainterPath <i>path</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapFromItem-5">mapFromItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, float <i>ax</i>, float <i>ay</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapFromItem-6">mapFromItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapFromParent">mapFromParent</a></b> (<i>self</i>, QPointF <i>point</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapFromParent-2">mapFromParent</a></b> (<i>self</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapFromParent-3">mapFromParent</a></b> (<i>self</i>, QPolygonF <i>polygon</i>)</li><li><div class="fn" />QPainterPath <b><a href="qgraphicsitem.html#mapFromParent-4">mapFromParent</a></b> (<i>self</i>, QPainterPath <i>path</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapFromParent-5">mapFromParent</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapFromParent-6">mapFromParent</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapFromScene">mapFromScene</a></b> (<i>self</i>, QPointF <i>point</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapFromScene-2">mapFromScene</a></b> (<i>self</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapFromScene-3">mapFromScene</a></b> (<i>self</i>, QPolygonF <i>polygon</i>)</li><li><div class="fn" />QPainterPath <b><a href="qgraphicsitem.html#mapFromScene-4">mapFromScene</a></b> (<i>self</i>, QPainterPath <i>path</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapFromScene-5">mapFromScene</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapFromScene-6">mapFromScene</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectFromItem">mapRectFromItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectFromItem-2">mapRectFromItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectFromParent">mapRectFromParent</a></b> (<i>self</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectFromParent-2">mapRectFromParent</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectFromScene">mapRectFromScene</a></b> (<i>self</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectFromScene-2">mapRectFromScene</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectToItem">mapRectToItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectToItem-2">mapRectToItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectToParent">mapRectToParent</a></b> (<i>self</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectToParent-2">mapRectToParent</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectToScene">mapRectToScene</a></b> (<i>self</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#mapRectToScene-2">mapRectToScene</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapToItem">mapToItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QPointF <i>point</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapToItem-2">mapToItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapToItem-3">mapToItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QPolygonF <i>polygon</i>)</li><li><div class="fn" />QPainterPath <b><a href="qgraphicsitem.html#mapToItem-4">mapToItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, QPainterPath <i>path</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapToItem-5">mapToItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, float <i>ax</i>, float <i>ay</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapToItem-6">mapToItem</a></b> (<i>self</i>, QGraphicsItem <i>item</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapToParent">mapToParent</a></b> (<i>self</i>, QPointF <i>point</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapToParent-2">mapToParent</a></b> (<i>self</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapToParent-3">mapToParent</a></b> (<i>self</i>, QPolygonF <i>polygon</i>)</li><li><div class="fn" />QPainterPath <b><a href="qgraphicsitem.html#mapToParent-4">mapToParent</a></b> (<i>self</i>, QPainterPath <i>path</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapToParent-5">mapToParent</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapToParent-6">mapToParent</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapToScene">mapToScene</a></b> (<i>self</i>, QPointF <i>point</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapToScene-2">mapToScene</a></b> (<i>self</i>, QRectF <i>rect</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapToScene-3">mapToScene</a></b> (<i>self</i>, QPolygonF <i>polygon</i>)</li><li><div class="fn" />QPainterPath <b><a href="qgraphicsitem.html#mapToScene-4">mapToScene</a></b> (<i>self</i>, QPainterPath <i>path</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#mapToScene-5">mapToScene</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</li><li><div class="fn" />QPolygonF <b><a href="qgraphicsitem.html#mapToScene-6">mapToScene</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</li><li><div class="fn" />QMatrix <b><a href="qgraphicsitem.html#matrix">matrix</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#mouseDoubleClickEvent">mouseDoubleClickEvent</a></b> (<i>self</i>, QGraphicsSceneMouseEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#mouseMoveEvent">mouseMoveEvent</a></b> (<i>self</i>, QGraphicsSceneMouseEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a></b> (<i>self</i>, QGraphicsSceneMouseEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#mouseReleaseEvent">mouseReleaseEvent</a></b> (<i>self</i>, QGraphicsSceneMouseEvent <i>event</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#moveBy">moveBy</a></b> (<i>self</i>, float <i>dx</i>, float <i>dy</i>)</li><li><div class="fn" />float <b><a href="qgraphicsitem.html#opacity">opacity</a></b> (<i>self</i>)</li><li><div class="fn" />QPainterPath <b><a href="qgraphicsitem.html#opaqueArea">opaqueArea</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#paint">paint</a></b> (<i>self</i>, QPainter <i>painter</i>, QStyleOptionGraphicsItem <i>option</i>, QWidget <i>widget</i> = None)</li><li><div class="fn" />QGraphicsItem <b><a href="qgraphicsitem.html#panel">panel</a></b> (<i>self</i>)</li><li><div class="fn" />PanelModality <b><a href="qgraphicsitem.html#panelModality">panelModality</a></b> (<i>self</i>)</li><li><div class="fn" />QGraphicsItem <b><a href="qgraphicsitem.html#parentItem">parentItem</a></b> (<i>self</i>)</li><li><div class="fn" />QGraphicsObject <b><a href="qgraphicsitem.html#parentObject">parentObject</a></b> (<i>self</i>)</li><li><div class="fn" />QGraphicsWidget <b><a href="qgraphicsitem.html#parentWidget">parentWidget</a></b> (<i>self</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#pos">pos</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#prepareGeometryChange">prepareGeometryChange</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#removeSceneEventFilter">removeSceneEventFilter</a></b> (<i>self</i>, QGraphicsItem <i>filterItem</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#resetMatrix">resetMatrix</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#resetTransform">resetTransform</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#rotate">rotate</a></b> (<i>self</i>, float <i>angle</i>)</li><li><div class="fn" />float <b><a href="qgraphicsitem.html#rotation">rotation</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#scale">scale</a></b> (<i>self</i>, float <i>sx</i>, float <i>sy</i>)</li><li><div class="fn" />float <b><a href="qgraphicsitem.html#scale-2">scale</a></b> (<i>self</i>)</li><li><div class="fn" />QGraphicsScene <b><a href="qgraphicsitem.html#scene">scene</a></b> (<i>self</i>)</li><li><div class="fn" />QRectF <b><a href="qgraphicsitem.html#sceneBoundingRect">sceneBoundingRect</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#sceneEvent">sceneEvent</a></b> (<i>self</i>, QEvent <i>event</i>)</li><li><div class="fn" />bool <b><a href="qgraphicsitem.html#sceneEventFilter">sceneEventFilter</a></b> (<i>self</i>, QGraphicsItem <i>watched</i>, QEvent <i>event</i>)</li><li><div class="fn" />QMatrix <b><a href="qgraphicsitem.html#sceneMatrix">sceneMatrix</a></b> (<i>self</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#scenePos">scenePos</a></b> (<i>self</i>)</li><li><div class="fn" />QTransform <b><a href="qgraphicsitem.html#sceneTransform">sceneTransform</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#scroll">scroll</a></b> (<i>self</i>, float <i>dx</i>, float <i>dy</i>, QRectF <i>rect</i> = QRectF())</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setAcceptDrops">setAcceptDrops</a></b> (<i>self</i>, bool <i>on</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setAcceptedMouseButtons">setAcceptedMouseButtons</a></b> (<i>self</i>, Qt.MouseButtons <i>buttons</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setAcceptHoverEvents">setAcceptHoverEvents</a></b> (<i>self</i>, bool <i>enabled</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setAcceptsHoverEvents">setAcceptsHoverEvents</a></b> (<i>self</i>, bool <i>enabled</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setAcceptTouchEvents">setAcceptTouchEvents</a></b> (<i>self</i>, bool <i>enabled</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setActive">setActive</a></b> (<i>self</i>, bool <i>active</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setBoundingRegionGranularity">setBoundingRegionGranularity</a></b> (<i>self</i>, float <i>granularity</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setCacheMode">setCacheMode</a></b> (<i>self</i>, CacheMode <i>mode</i>, QSize <i>logicalCacheSize</i> = QSize())</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setCursor">setCursor</a></b> (<i>self</i>, QCursor <i>cursor</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setData">setData</a></b> (<i>self</i>, int <i>key</i>, QVariant <i>value</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setEnabled">setEnabled</a></b> (<i>self</i>, bool <i>enabled</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setFiltersChildEvents">setFiltersChildEvents</a></b> (<i>self</i>, bool <i>enabled</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setFlag">setFlag</a></b> (<i>self</i>, GraphicsItemFlag <i>flag</i>, bool <i>enabled</i> = True)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setFlags">setFlags</a></b> (<i>self</i>, GraphicsItemFlags <i>flags</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setFocus">setFocus</a></b> (<i>self</i>, Qt.FocusReason <i>focusReason</i> = Qt.OtherFocusReason)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setFocusProxy">setFocusProxy</a></b> (<i>self</i>, QGraphicsItem <i>item</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setGraphicsEffect">setGraphicsEffect</a></b> (<i>self</i>, QGraphicsEffect <i>effect</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setGroup">setGroup</a></b> (<i>self</i>, QGraphicsItemGroup <i>group</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setHandlesChildEvents">setHandlesChildEvents</a></b> (<i>self</i>, bool <i>enabled</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setInputMethodHints">setInputMethodHints</a></b> (<i>self</i>, Qt.InputMethodHints <i>hints</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setMatrix">setMatrix</a></b> (<i>self</i>, QMatrix <i>matrix</i>, bool <i>combine</i> = False)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setOpacity">setOpacity</a></b> (<i>self</i>, float <i>opacity</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setPanelModality">setPanelModality</a></b> (<i>self</i>, PanelModality <i>panelModality</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setParentItem">setParentItem</a></b> (<i>self</i>, QGraphicsItem <i>parent</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setPos">setPos</a></b> (<i>self</i>, QPointF <i>pos</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setPos-2">setPos</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setRotation">setRotation</a></b> (<i>self</i>, float <i>angle</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setScale">setScale</a></b> (<i>self</i>, float <i>scale</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setSelected">setSelected</a></b> (<i>self</i>, bool <i>selected</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setToolTip">setToolTip</a></b> (<i>self</i>, QString <i>toolTip</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setTransform">setTransform</a></b> (<i>self</i>, QTransform <i>matrix</i>, bool <i>combine</i> = False)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setTransformations">setTransformations</a></b> (<i>self</i>, unknown-type <i>transformations</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a></b> (<i>self</i>, QPointF <i>origin</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setTransformOriginPoint-2">setTransformOriginPoint</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setVisible">setVisible</a></b> (<i>self</i>, bool <i>visible</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setX">setX</a></b> (<i>self</i>, float <i>x</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setY">setY</a></b> (<i>self</i>, float <i>y</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#setZValue">setZValue</a></b> (<i>self</i>, float <i>z</i>)</li><li><div class="fn" />QPainterPath <b><a href="qgraphicsitem.html#shape">shape</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#shear">shear</a></b> (<i>self</i>, float <i>sh</i>, float <i>sv</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#show">show</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#stackBefore">stackBefore</a></b> (<i>self</i>, QGraphicsItem <i>sibling</i>)</li><li><div class="fn" />QGraphicsObject <b><a href="qgraphicsitem.html#toGraphicsObject">toGraphicsObject</a></b> (<i>self</i>)</li><li><div class="fn" />QString <b><a href="qgraphicsitem.html#toolTip">toolTip</a></b> (<i>self</i>)</li><li><div class="fn" />QGraphicsItem <b><a href="qgraphicsitem.html#topLevelItem">topLevelItem</a></b> (<i>self</i>)</li><li><div class="fn" />QGraphicsWidget <b><a href="qgraphicsitem.html#topLevelWidget">topLevelWidget</a></b> (<i>self</i>)</li><li><div class="fn" />QTransform <b><a href="qgraphicsitem.html#transform">transform</a></b> (<i>self</i>)</li><li><div class="fn" />unknown-type <b><a href="qgraphicsitem.html#transformations">transformations</a></b> (<i>self</i>)</li><li><div class="fn" />QPointF <b><a href="qgraphicsitem.html#transformOriginPoint">transformOriginPoint</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#translate">translate</a></b> (<i>self</i>, float <i>dx</i>, float <i>dy</i>)</li><li><div class="fn" />int <b><a href="qgraphicsitem.html#type">type</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#ungrabKeyboard">ungrabKeyboard</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#ungrabMouse">ungrabMouse</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#unsetCursor">unsetCursor</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#update">update</a></b> (<i>self</i>, QRectF <i>rect</i> = QRectF())</li><li><div class="fn" /><b><a href="qgraphicsitem.html#update-2">update</a></b> (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>width</i>, float <i>height</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#updateMicroFocus">updateMicroFocus</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qgraphicsitem.html#wheelEvent">wheelEvent</a></b> (<i>self</i>, QGraphicsSceneWheelEvent <i>event</i>)</li><li><div class="fn" />QGraphicsWidget <b><a href="qgraphicsitem.html#window">window</a></b> (<i>self</i>)</li><li><div class="fn" />float <b><a href="qgraphicsitem.html#x">x</a></b> (<i>self</i>)</li><li><div class="fn" />float <b><a href="qgraphicsitem.html#y">y</a></b> (<i>self</i>)</li><li><div class="fn" />float <b><a href="qgraphicsitem.html#zValue">zValue</a></b> (<i>self</i>)</li></ul><h3>Static Members</h3><ul><li><div class="fn" />int <b><a href="qgraphicsitem.html#UserType-var">UserType</a></b></li></ul><a name="details" /><hr /><h2>Detailed Description</h2><p>The QGraphicsItem class is the base class for all graphical
items in a <a href="qgraphicsscene.html">QGraphicsScene</a>.</p>
<p>It provides a light-weight foundation for writing your own
custom items. This includes defining the item's geometry, collision
detection, its painting implementation and item interaction through
its event handlers. QGraphicsItem is part of the <a href="graphicsview.html">Graphics View Framework</a></p>
<p class="centerAlign"><img alt="" src="images/graphicsview-items.png" /></p>
<p>For convenience, Qt provides a set of standard graphics items
for the most common shapes. These are:</p>
<ul>
<li><a href="qgraphicsellipseitem.html">QGraphicsEllipseItem</a>
provides an ellipse item</li>
<li><a href="qgraphicslineitem.html">QGraphicsLineItem</a> provides
a line item</li>
<li><a href="qgraphicspathitem.html">QGraphicsPathItem</a> provides
an arbitrary path item</li>
<li><a href="qgraphicspixmapitem.html">QGraphicsPixmapItem</a>
provides a pixmap item</li>
<li><a href="qgraphicspolygonitem.html">QGraphicsPolygonItem</a>
provides a polygon item</li>
<li><a href="qgraphicsrectitem.html">QGraphicsRectItem</a> provides
a rectangular item</li>
<li><a href="qgraphicssimpletextitem.html">QGraphicsSimpleTextItem</a> provides
a simple text label item</li>
<li><a href="qgraphicstextitem.html">QGraphicsTextItem</a> provides
an advanced text browser item</li>
</ul>
<p>All of an item's geometric information is based on its local
coordinate system. The item's position, <a href="qgraphicsitem.html#pos">pos</a>(), is the only function that does
not operate in local coordinates, as it returns a position in
parent coordinates. <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a> describes the coordinate system
in detail.</p>
<p>You can set whether an item should be visible (i.e., drawn, and
accepting events), by calling <a href="qgraphicsitem.html#setVisible">setVisible</a>(). Hiding an item
will also hide its children. Similarly, you can enable or disable
an item by calling <a href="qgraphicsitem.html#setEnabled">setEnabled</a>(). If you disable an
item, all its children will also be disabled. By default, items are
both visible and enabled. To toggle whether an item is selected or
not, first enable selection by setting the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsSelectable</a>
flag, and then call <a href="qgraphicsitem.html#setSelected">setSelected</a>(). Normally,
selection is toggled by the scene, as a result of user
interaction.</p>
<p>To write your own graphics item, you first create a subclass of
QGraphicsItem, and then start by implementing its two pure virtual
public functions: <a href="qgraphicsitem.html#boundingRect">boundingRect</a>(), which returns
an estimate of the area painted by the item, and <a href="qgraphicsitem.html#paint">paint</a>(), which implements the actual
painting. For example:</p>
<pre class="cpp">
<span class="keyword">class</span> SimpleItem : <span class="keyword">public</span> <span class="type">QGraphicsItem</span>
{
<span class="keyword">public</span>:
<span class="type"><a href="qrectf.html">QRectF</a></span> boundingRect() <span class="keyword">const</span>
{
<span class="type"><a href="qtcore.html#qreal-typedef">qreal</a></span> penWidth <span class="operator">=</span> <span class="number">1</span>;
<span class="keyword">return</span> <span class="type"><a href="qrectf.html">QRectF</a></span>(<span class="operator">-</span><span class="number">10</span> <span class="operator">-</span> penWidth <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> <span class="operator">-</span><span class="number">10</span> <span class="operator">-</span> penWidth <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span>
<span class="number">20</span> <span class="operator">+</span> penWidth<span class="operator">,</span> <span class="number">20</span> <span class="operator">+</span> penWidth);
}
<span class="type">void</span> paint(<span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span>painter<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstyleoptiongraphicsitem.html">QStyleOptionGraphicsItem</a></span> <span class="operator">*</span>option<span class="operator">,</span>
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget)
{
painter<span class="operator">-</span><span class="operator">></span>drawRoundedRect(<span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="number">20</span><span class="operator">,</span> <span class="number">20</span><span class="operator">,</span> <span class="number">5</span><span class="operator">,</span> <span class="number">5</span>);
}
};
</pre>
<p>The <a href="qgraphicsitem.html#boundingRect">boundingRect</a>()
function has many different purposes. <a href="qgraphicsscene.html">QGraphicsScene</a> bases its item index on
<a href="qgraphicsitem.html#boundingRect">boundingRect</a>(), and
<a href="qgraphicsview.html">QGraphicsView</a> uses it both for
culling invisible items, and for determining the area that needs to
be recomposed when drawing overlapping items. In addition,
QGraphicsItem's collision detection mechanisms use <a href="qgraphicsitem.html#boundingRect">boundingRect</a>() to provide an
efficient cut-off. The fine grained collision algorithm in <a href="qgraphicsitem.html#collidesWithItem">collidesWithItem</a>() is
based on calling <a href="qgraphicsitem.html#shape">shape</a>(),
which returns an accurate outline of the item's shape as a <a href="qpainterpath.html">QPainterPath</a>.</p>
<p><a href="qgraphicsscene.html">QGraphicsScene</a> expects all
items <a href="qgraphicsitem.html#boundingRect">boundingRect</a>()
and <a href="qgraphicsitem.html#shape">shape</a>() to remain
unchanged unless it is notified. If you want to change an item's
geometry in any way, you must first call <a href="qgraphicsitem.html#prepareGeometryChange">prepareGeometryChange</a>()
to allow <a href="qgraphicsscene.html">QGraphicsScene</a> to update
its bookkeeping.</p>
<p>Collision detection can be done in two ways:</p>
<ol class="1">
<li>Reimplement <a href="qgraphicsitem.html#shape">shape</a>() to
return an accurate shape for your item, and rely on the default
implementation of <a href="qgraphicsitem.html#collidesWithItem">collidesWithItem</a>() to do
shape-shape intersection. This can be rather expensive if the
shapes are complex.</li>
<li>Reimplement <a href="qgraphicsitem.html#collidesWithItem">collidesWithItem</a>() to
provide your own custom item and shape collision algorithm.</li>
</ol>
<p>The <a href="qgraphicsitem.html#contains">contains</a>()
function can be called to determine whether the item
<i>contains</i> a point or not. This function can also be
reimplemented by the item. The default behavior of <a href="qgraphicsitem.html#contains">contains</a>() is based on calling
<a href="qgraphicsitem.html#shape">shape</a>().</p>
<p>Items can contain other items, and also be contained by other
items. All items can have a parent item and a list of children.
Unless the item has no parent, its position is in <i>parent</i>
coordinates (i.e., the parent's local coordinates). Parent items
propagate both their position and their transformation to all
children.</p>
<p class="centerAlign"><img alt="" src="images/graphicsview-parentchild.png" /></p>
<a id="transformations" name="transformations" /><a id="transformations" name="transformations" />
<h3>Transformations</h3>
<p>QGraphicsItem supports projective transformations in addition to
its base position, <a href="qgraphicsitem.html#pos">pos</a>().
There are several ways to change an item's transformation. For
simple transformations, you can call either of the convenience
functions <a href="qgraphicsitem.html#setRotation">setRotation</a>() or <a href="qgraphicsitem.html#setScale">setScale</a>(), or you can pass any
transformation matrix to <a href="qgraphicsitem.html#setTransform">setTransform</a>(). For advanced
transformation control you also have the option of setting several
combined transformations by calling <a href="qgraphicsitem.html#setTransformations">setTransformations</a>().</p>
<p>Item transformations accumulate from parent to child, so if both
a parent and child item are rotated 90 degrees, the child's total
transformation will be 180 degrees. Similarly, if the item's parent
is scaled to 2x its original size, its children will also be twice
as large. An item's transformation does not affect its own local
geometry; all geometry functions (e.g., <a href="qgraphicsitem.html#contains">contains</a>(), <a href="qgraphicsitem.html#update">update</a>(), and all the mapping
functions) still operate in local coordinates. For convenience,
QGraphicsItem provides the functions <a href="qgraphicsitem.html#sceneTransform">sceneTransform</a>(), which
returns the item's total transformation matrix (including its
position and all parents' positions and transformations), and
<a href="qgraphicsitem.html#scenePos">scenePos</a>(), which returns
its position in scene coordinates. To reset an item's matrix, call
<a href="qgraphicsitem.html#resetTransform">resetTransform</a>().</p>
<p>Certain transformation operations produce a different outcome
depending on the order in which they are applied. For example, if
you scale an transform, and then rotate it, you may get a different
result than if the transform was rotated first. However, the order
you set the transformation properties on QGraphicsItem does not
affect the resulting transformation; QGraphicsItem always applies
the properties in a fixed, defined order:</p>
<ul>
<li>The item's base transform is applied (<a href="qgraphicsitem.html#transform">transform</a>())</li>
<li>The item's transformations list is applied in order (<a href="qgraphicsitem.html#transformations">transformations</a>())</li>
<li>The item is rotated relative to its transform origin point
(<a href="qgraphicsitem.html#rotation">rotation</a>(), <a href="qgraphicsitem.html#transformOriginPoint">transformOriginPoint</a>())</li>
<li>The item is scaled relative to its transform origin point
(<a href="qgraphicsitem.html#scale">scale</a>(), <a href="qgraphicsitem.html#transformOriginPoint">transformOriginPoint</a>())</li>
</ul>
<a id="painting" name="painting" />
<h3>Painting</h3>
<p>The <a href="qgraphicsitem.html#paint">paint</a>() function is
called by <a href="qgraphicsview.html">QGraphicsView</a> to paint
the item's contents. The item has no background or default fill of
its own; whatever is behind the item will shine through all areas
that are not explicitly painted in this function. You can call
<a href="qgraphicsitem.html#update">update</a>() to schedule a
repaint, optionally passing the rectangle that needs a repaint.
Depending on whether or not the item is visible in a view, the item
may or may not be repainted; there is no equivalent to <a href="qwidget.html#repaint">QWidget.repaint</a>() in QGraphicsItem.</p>
<p>Items are painted by the view, starting with the parent items
and then drawing children, in ascending stacking order. You can set
an item's stacking order by calling <a href="qgraphicsitem.html#setZValue">setZValue</a>(), and test it by
calling <a href="qgraphicsitem.html#zValue">zValue</a>(), where
items with low z-values are painted before items with high
z-values. Stacking order applies to sibling items; parents are
always drawn before their children.</p>
<a id="sorting" name="sorting" />
<h3>Sorting</h3>
<p>All items are drawn in a defined, stable order, and this same
order decides which items will receive mouse input first when you
click on the scene. Normally you don't have to worry about sorting,
as the items follow a "natural order", following the logical
structure of the scene.</p>
<p>An item's children are stacked on top of the parent, and sibling
items are stacked by insertion order (i.e., in the same order that
they were either added to the scene, or added to the same parent).
If you add item A, and then B, then B will be on top of A. If you
then add C, the items' stacking order will be A, then B, then
C.</p>
<p class="centerAlign"><img alt="" src="images/graphicsview-zorder.png" /></p>
<p>This example shows the stacking order of all limbs of the robot
from the <a href="graphicsview-dragdroprobot.html">Drag and Drop
Robot</a> example. The torso is the root item (all other items are
children or descendants of the torso), so it is drawn first. Next,
the head is drawn, as it is the first item in the torso's list of
children. Then the upper left arm is drawn. As the lower arm is a
child of the upper arm, the lower arm is then drawn, followed by
the upper arm's next sibling, which is the upper right arm, and so
on.</p>
<p>For advanced users, there are ways to alter how your items are
sorted:</p>
<ul>
<li>You can call <a href="qgraphicsitem.html#setZValue">setZValue</a>() on an item to
explicitly stack it on top of, or under, other sibling items. The
default Z value for an item is 0. Items with the same Z value are
stacked by insertion order.</li>
<li>You can call <a href="qgraphicsitem.html#stackBefore">stackBefore</a>() to reorder the
list of children. This will directly modify the insertion
order.</li>
<li>You can set the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemStacksBehindParent</a>
flag to stack a child item behind its parent.</li>
</ul>
<p>The stacking order of two sibling items also counts for each
item's children and descendant items. So if one item is on top of
another, then all its children will also be on top of all the other
item's children as well.</p>
<a id="events" name="events" />
<h3>Events</h3>
<p>QGraphicsItem receives events from <a href="qgraphicsscene.html">QGraphicsScene</a> through the virtual
function <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().
This function distributes the most common events to a set of
convenience event handlers:</p>
<ul>
<li><a href="qgraphicsitem.html#contextMenuEvent">contextMenuEvent</a>()
handles context menu events</li>
<li><a href="qgraphicsitem.html#focusInEvent">focusInEvent</a>()
and <a href="qgraphicsitem.html#focusOutEvent">focusOutEvent</a>()
handle focus in and out events</li>
<li><a href="qgraphicsitem.html#hoverEnterEvent">hoverEnterEvent</a>(),
<a href="qgraphicsitem.html#hoverMoveEvent">hoverMoveEvent</a>(),
and <a href="qgraphicsitem.html#hoverLeaveEvent">hoverLeaveEvent</a>() handles
hover enter, move and leave events</li>
<li><a href="qgraphicsitem.html#inputMethodEvent">inputMethodEvent</a>()
handles input events, for accessibility support</li>
<li><a href="qgraphicsitem.html#keyPressEvent">keyPressEvent</a>()
and <a href="qgraphicsitem.html#keyReleaseEvent">keyReleaseEvent</a>() handle
key press and release events</li>
<li><a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>(),
<a href="qgraphicsitem.html#mouseMoveEvent">mouseMoveEvent</a>(),
<a href="qgraphicsitem.html#mouseReleaseEvent">mouseReleaseEvent</a>(), and
<a href="qgraphicsitem.html#mouseDoubleClickEvent">mouseDoubleClickEvent</a>()
handles mouse press, move, release, click and doubleclick
events</li>
</ul>
<p>You can filter events for any other item by installing event
filters. This functionality is separate from Qt's regular event
filters (see <a href="qobject.html#installEventFilter">QObject.installEventFilter</a>()),
which only work on subclasses of <a href="qobject.html">QObject</a>. After installing your item as an event
filter for another item by calling <a href="qgraphicsitem.html#installSceneEventFilter">installSceneEventFilter</a>(),
the filtered events will be received by the virtual function
<a href="qgraphicsitem.html#sceneEventFilter">sceneEventFilter</a>(). You
can remove item event filters by calling <a href="qgraphicsitem.html#removeSceneEventFilter">removeSceneEventFilter</a>().</p>
<a id="custom-data" name="custom-data" />
<h3>Custom Data</h3>
<p>Sometimes it's useful to register custom data with an item, be
it a custom item, or a standard item. You can call <a href="qgraphicsitem.html#setData">setData</a>() on any item to store
data in it using a key-value pair (the key being an integer, and
the value is a <a href="qvariant.html">QVariant</a>). To get custom
data from an item, call <a href="qgraphicsitem.html#data">data</a>(). This functionality is
completely untouched by Qt itself; it is provided for the user's
convenience.</p>
<hr /><h2>Type Documentation</h2><h3 class="fn"><a name="CacheMode-enum" />QGraphicsItem.CacheMode</h3><p>This enum describes <a href="qgraphicsitem.html">QGraphicsItem</a>'s cache modes. Caching is
used to speed up rendering by allocating and rendering to an
off-screen pixel buffer, which can be reused when the item requires
redrawing. For some paint devices, the cache is stored directly in
graphics memory, which makes rendering very quick.</p>
<table class="valuelist">
<tr class="odd" valign="top">
<th class="tblConst">Constant</th>
<th class="tblval">Value</th>
<th class="tbldscr">Description</th>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.NoCache</tt></td>
<td class="topAlign"><tt>0</tt></td>
<td class="topAlign">The default; all item caching is disabled.
<a href="qgraphicsitem.html#paint">QGraphicsItem.paint</a>() is
called every time the item needs redrawing.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemCoordinateCache</tt></td>
<td class="topAlign"><tt>1</tt></td>
<td class="topAlign">Caching is enabled for the item's logical
(local) coordinate system. <a href="qgraphicsitem.html">QGraphicsItem</a> creates an off-screen pixel
buffer with a configurable size / resolution that you can pass to
<a href="qgraphicsitem.html#setCacheMode">QGraphicsItem.setCacheMode</a>().
Rendering quality will typically degrade, depending on the
resolution of the cache and the item transformation. The first time
the item is redrawn, it will render itself into the cache, and the
cache is then reused for every subsequent expose. The cache is also
reused as the item is transformed. To adjust the resolution of the
cache, you can call <a href="qgraphicsitem.html#setCacheMode">setCacheMode</a>() again.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.DeviceCoordinateCache</tt></td>
<td class="topAlign"><tt>2</tt></td>
<td class="topAlign">Caching is enabled at the paint device level,
in device coordinates. This mode is for items that can move, but
are not rotated, scaled or sheared. If the item is transformed
directly or indirectly, the cache will be regenerated
automatically. Unlike ItemCoordinateCacheMode,
DeviceCoordinateCache always renders at maximum quality.</td>
</tr>
</table>
<p>This enum was introduced or modified in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setCacheMode">QGraphicsItem.setCacheMode</a>().</p>
<h3 class="fn"><a name="GraphicsItemChange-enum" />QGraphicsItem.GraphicsItemChange</h3><p>This enum describes the state changes that are notified by
<a href="qgraphicsitem.html#itemChange">QGraphicsItem.itemChange</a>().
The notifications are sent as the state changes, and in some cases,
adjustments can be made (see the documentation for each change for
details).</p>
<p>Note: Be careful with calling functions on the <a href="qgraphicsitem.html">QGraphicsItem</a> itself inside <a href="qgraphicsitem.html#itemChange">itemChange</a>(), as certain
function calls can lead to unwanted recursion. For example, you
cannot call <a href="qgraphicsitem.html#setPos">setPos</a>() in
<a href="qgraphicsitem.html#itemChange">itemChange</a>() on an
ItemPositionChange notification, as the <a href="qgraphicsitem.html#setPos">setPos</a>() function will again call
itemChange(ItemPositionChange). Instead, you can return the new,
adjusted position from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</p>
<table class="valuelist">
<tr class="odd" valign="top">
<th class="tblConst">Constant</th>
<th class="tblval">Value</th>
<th class="tbldscr">Description</th>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemEnabledChange</tt></td>
<td class="topAlign"><tt>3</tt></td>
<td class="topAlign">The item's enabled state changes. If the item
is presently enabled, it will become disabled, and vice verca. The
value argument is the new enabled state (i.e., true or false). Do
not call <a href="qgraphicsitem.html#setEnabled">setEnabled</a>()
in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. Instead, you can return the new state
from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemEnabledHasChanged</tt></td>
<td class="topAlign"><tt>13</tt></td>
<td class="topAlign">The item's enabled state has changed. The
value argument is the new enabled state (i.e., true or false). Do
not call <a href="qgraphicsitem.html#setEnabled">setEnabled</a>()
in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemMatrixChange</tt></td>
<td class="topAlign"><tt>1</tt></td>
<td class="topAlign">The item's affine transformation matrix is
changing. This value is obsolete; you can use ItemTransformChange
instead.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemPositionChange</tt></td>
<td class="topAlign"><tt>0</tt></td>
<td class="topAlign">The item's position changes. This notification
is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and when the item's local position changes,
relative to its parent (i.e., as a result of calling <a href="qgraphicsitem.html#setPos">setPos</a>() or <a href="qgraphicsitem.html#moveBy">moveBy</a>()). The value argument is
the new position (i.e., a <a href="qpointf.html">QPointF</a>). You
can call <a href="qgraphicsitem.html#pos">pos</a>() to get the
original position. Do not call <a href="qgraphicsitem.html#setPos">setPos</a>() or <a href="qgraphicsitem.html#moveBy">moveBy</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered; instead, you can return the new,
adjusted position from <a href="qgraphicsitem.html#itemChange">itemChange</a>(). After this
notification, <a href="qgraphicsitem.html">QGraphicsItem</a>
immediately sends the ItemPositionHasChanged notification if the
position changed.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemPositionHasChanged</tt></td>
<td class="topAlign"><tt>9</tt></td>
<td class="topAlign">The item's position has changed. This
notification is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and after the item's local position, relative to
its parent, has changed. The value argument is the new position
(the same as <a href="qgraphicsitem.html#pos">pos</a>()), and
<a href="qgraphicsitem.html">QGraphicsItem</a> ignores the return
value for this notification (i.e., a read-only notification).</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemTransformChange</tt></td>
<td class="topAlign"><tt>8</tt></td>
<td class="topAlign">The item's transformation matrix changes. This
notification is send if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and when the item's local transformation matrix
changes (i.e., as a result of calling <a href="qgraphicsitem.html#setTransform">setTransform</a>(). The value
argument is the new matrix (i.e., a <a href="qtransform.html">QTransform</a>); to get the old matrix, call
<a href="qgraphicsitem.html#transform">transform</a>(). Do not call
<a href="qgraphicsitem.html#setTransform">setTransform</a>() or set
any of the transformation properties in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered; instead, you can return the new matrix
from <a href="qgraphicsitem.html#itemChange">itemChange</a>(). This
notification is not sent if you change the transformation
properties.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemTransformHasChanged</tt></td>
<td class="topAlign"><tt>10</tt></td>
<td class="topAlign">The item's transformation matrix has changed
either because setTransform is called, or one of the transformation
properties is changed. This notification is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and after the item's local transformation matrix
has changed. The value argument is the new matrix (same as <a href="qgraphicsitem.html#transform">transform</a>()), and <a href="qgraphicsitem.html">QGraphicsItem</a> ignores the return value for
this notification (i.e., a read-only notification).</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemRotationChange</tt></td>
<td class="topAlign"><tt>28</tt></td>
<td class="topAlign">The item's rotation property changes. This
notification is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and when the item's rotation property changes
(i.e., as a result of calling <a href="qgraphicsitem.html#setRotation">setRotation</a>()). The value
argument is the new rotation (i.e., a double); to get the old
rotation, call <a href="qgraphicsitem.html#rotation">rotation</a>(). Do not call <a href="qgraphicsitem.html#setRotation">setRotation</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered; instead, you can return the new rotation
from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemRotationHasChanged</tt></td>
<td class="topAlign"><tt>29</tt></td>
<td class="topAlign">The item's rotation property has changed. This
notification is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and after the item's rotation property has
changed. The value argument is the new rotation (i.e., a double),
and <a href="qgraphicsitem.html">QGraphicsItem</a> ignores the
return value for this notification (i.e., a read-only
notification). Do not call <a href="qgraphicsitem.html#setRotation">setRotation</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemScaleChange</tt></td>
<td class="topAlign"><tt>30</tt></td>
<td class="topAlign">The item's scale property changes. This
notification is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and when the item's scale property changes (i.e.,
as a result of calling <a href="qgraphicsitem.html#setScale">setScale</a>()). The value argument
is the new scale (i.e., a double); to get the old scale, call
<a href="qgraphicsitem.html#scale">scale</a>(). Do not call
<a href="qgraphicsitem.html#setScale">setScale</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered; instead, you can return the new scale
from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemScaleHasChanged</tt></td>
<td class="topAlign"><tt>31</tt></td>
<td class="topAlign">The item's scale property has changed. This
notification is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and after the item's scale property has changed.
The value argument is the new scale (i.e., a double), and <a href="qgraphicsitem.html">QGraphicsItem</a> ignores the return value for
this notification (i.e., a read-only notification). Do not call
<a href="qgraphicsitem.html#setScale">setScale</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemTransformOriginPointChange</tt></td>
<td class="topAlign"><tt>32</tt></td>
<td class="topAlign">The item's transform origin point property
changes. This notification is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and when the item's transform origin point
property changes (i.e., as a result of calling <a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>()).
The value argument is the new origin point (i.e., a <a href="qpointf.html">QPointF</a>); to get the old origin point, call
<a href="qgraphicsitem.html#transformOriginPoint">transformOriginPoint</a>().
Do not call <a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>()
in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered; instead, you can return the new
transform origin point from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemTransformOriginPointHasChanged</tt></td>
<td class="topAlign"><tt>33</tt></td>
<td class="topAlign">The item's transform origin point property has
changed. This notification is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag is enabled, and after the item's transform origin point
property has changed. The value argument is the new origin point
(i.e., a <a href="qpointf.html">QPointF</a>), and <a href="qgraphicsitem.html">QGraphicsItem</a> ignores the return value for
this notification (i.e., a read-only notification). Do not call
<a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>()
in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemSelectedChange</tt></td>
<td class="topAlign"><tt>4</tt></td>
<td class="topAlign">The item's selected state changes. If the item
is presently selected, it will become unselected, and vice verca.
The value argument is the new selected state (i.e., true or false).
Do not call <a href="qgraphicsitem.html#setSelected">setSelected</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered; instead, you can return the new selected
state from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemSelectedHasChanged</tt></td>
<td class="topAlign"><tt>14</tt></td>
<td class="topAlign">The item's selected state has changed. The
value argument is the new selected state (i.e., true or false). Do
not call <a href="qgraphicsitem.html#setSelected">setSelected</a>()
in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemVisibleChange</tt></td>
<td class="topAlign"><tt>2</tt></td>
<td class="topAlign">The item's visible state changes. If the item
is presently visible, it will become invisible, and vice verca. The
value argument is the new visible state (i.e., true or false). Do
not call <a href="qgraphicsitem.html#setVisible">setVisible</a>()
in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered; instead, you can return the new visible
state from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemVisibleHasChanged</tt></td>
<td class="topAlign"><tt>12</tt></td>
<td class="topAlign">The item's visible state has changed. The
value argument is the new visible state (i.e., true or false). Do
not call <a href="qgraphicsitem.html#setVisible">setVisible</a>()
in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemParentChange</tt></td>
<td class="topAlign"><tt>5</tt></td>
<td class="topAlign">The item's parent changes. The value argument
is the new parent item (i.e., a <a href="qgraphicsitem.html">QGraphicsItem</a> pointer). Do not call
<a href="qgraphicsitem.html#setParentItem">setParentItem</a>() in
<a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered; instead, you can return the new parent
from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemParentHasChanged</tt></td>
<td class="topAlign"><tt>15</tt></td>
<td class="topAlign">The item's parent has changed. The value
argument is the new parent (i.e., a pointer to a <a href="qgraphicsitem.html">QGraphicsItem</a>). Do not call <a href="qgraphicsitem.html#setParentItem">setParentItem</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemChildAddedChange</tt></td>
<td class="topAlign"><tt>6</tt></td>
<td class="topAlign">A child is added to this item. The value
argument is the new child item (i.e., a <a href="qgraphicsitem.html">QGraphicsItem</a> pointer). Do not pass this
item to any item's <a href="qgraphicsitem.html#setParentItem">setParentItem</a>() function as
this notification is delivered. The return value is unused; you
cannot adjust anything in this notification. Note that the new
child might not be fully constructed when this notification is
sent; calling pure virtual functions on the child can lead to a
crash.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemChildRemovedChange</tt></td>
<td class="topAlign"><tt>7</tt></td>
<td class="topAlign">A child is removed from this item. The value
argument is the child item that is about to be removed (i.e., a
<a href="qgraphicsitem.html">QGraphicsItem</a> pointer). The return
value is unused; you cannot adjust anything in this
notification.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemSceneChange</tt></td>
<td class="topAlign"><tt>11</tt></td>
<td class="topAlign">The item is moved to a new scene. This
notification is also sent when the item is added to its initial
scene, and when it is removed. The item's <a href="qgraphicsitem.html#scene">scene</a>() is the old scene (or 0 if
the item has not been added to a scene yet). The value argument is
the new scene (i.e., a <a href="qgraphicsscene.html">QGraphicsScene</a> pointer), or a null
pointer if the item is removed from a scene. Do not override this
change by passing this item to <a href="qgraphicsscene.html#addItem">QGraphicsScene.addItem</a>() as this
notification is delivered; instead, you can return the new scene
from <a href="qgraphicsitem.html#itemChange">itemChange</a>(). Use
this feature with caution; objecting to a scene change can quickly
lead to unwanted recursion.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemSceneHasChanged</tt></td>
<td class="topAlign"><tt>16</tt></td>
<td class="topAlign">The item's scene has changed. The item's
<a href="qgraphicsitem.html#scene">scene</a>() is the new scene.
This notification is also sent when the item is added to its
initial scene, and when it is removed.The value argument is the new
scene (i.e., a pointer to a <a href="qgraphicsscene.html">QGraphicsScene</a>). Do not call setScene()
in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemCursorChange</tt></td>
<td class="topAlign"><tt>17</tt></td>
<td class="topAlign">The item's cursor changes. The value argument
is the new cursor (i.e., a <a href="qcursor.html">QCursor</a>). Do
not call <a href="qgraphicsitem.html#setCursor">setCursor</a>() in
<a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. Instead, you can return a new cursor
from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemCursorHasChanged</tt></td>
<td class="topAlign"><tt>18</tt></td>
<td class="topAlign">The item's cursor has changed. The value
argument is the new cursor (i.e., a <a href="qcursor.html">QCursor</a>). Do not call <a href="qgraphicsitem.html#setCursor">setCursor</a>() as this notification
is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemToolTipChange</tt></td>
<td class="topAlign"><tt>19</tt></td>
<td class="topAlign">The item's tooltip changes. The value argument
is the new tooltip (i.e., a <a href="qtooltip.html">QToolTip</a>).
Do not call <a href="qgraphicsitem.html#setToolTip">setToolTip</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. Instead, you can return a new tooltip
from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemToolTipHasChanged</tt></td>
<td class="topAlign"><tt>20</tt></td>
<td class="topAlign">The item's tooltip has changed. The value
argument is the new tooltip (i.e., a <a href="qtooltip.html">QToolTip</a>). Do not call <a href="qgraphicsitem.html#setToolTip">setToolTip</a>() as this
notification is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemFlagsChange</tt></td>
<td class="topAlign"><tt>21</tt></td>
<td class="topAlign">The item's flags change. The value argument is
the new flags (i.e., a quint32). Do not call <a href="qgraphicsitem.html#setFlags">setFlags</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. Instead, you can return the new flags
from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemFlagsHaveChanged</tt></td>
<td class="topAlign"><tt>22</tt></td>
<td class="topAlign">The item's flags have changed. The value
argument is the new flags (i.e., a quint32). Do not call <a href="qgraphicsitem.html#setFlags">setFlags</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemZValueChange</tt></td>
<td class="topAlign"><tt>23</tt></td>
<td class="topAlign">The item's Z-value changes. The value argument
is the new Z-value (i.e., a double). Do not call <a href="qgraphicsitem.html#setZValue">setZValue</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. Instead, you can return a new Z-value
from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemZValueHasChanged</tt></td>
<td class="topAlign"><tt>24</tt></td>
<td class="topAlign">The item's Z-value has changed. The value
argument is the new Z-value (i.e., a double). Do not call <a href="qgraphicsitem.html#setZValue">setZValue</a>() as this notification
is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemOpacityChange</tt></td>
<td class="topAlign"><tt>25</tt></td>
<td class="topAlign">The item's opacity changes. The value argument
is the new opacity (i.e., a double). Do not call <a href="qgraphicsitem.html#setOpacity">setOpacity</a>() in <a href="qgraphicsitem.html#itemChange">itemChange</a>() as this
notification is delivered. Instead, you can return a new opacity
from <a href="qgraphicsitem.html#itemChange">itemChange</a>().</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemOpacityHasChanged</tt></td>
<td class="topAlign"><tt>26</tt></td>
<td class="topAlign">The item's opacity has changed. The value
argument is the new opacity (i.e., a double). Do not call <a href="qgraphicsitem.html#setOpacity">setOpacity</a>() as this
notification is delivered. The return value is ignored.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemScenePositionHasChanged</tt></td>
<td class="topAlign"><tt>27</tt></td>
<td class="topAlign">The item's scene position has changed. This
notification is sent if the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsScenePositionChanges</a>
flag is enabled, and after the item's scene position has changed
(i.e., the position or transformation of the item itself or the
position or transformation of any ancestor has changed). The value
argument is the new scene position (the same as <a href="qgraphicsitem.html#scenePos">scenePos</a>()), and <a href="qgraphicsitem.html">QGraphicsItem</a> ignores the return value for
this notification (i.e., a read-only notification).</td>
</tr>
</table>
<h3 class="fn"><a name="GraphicsItemFlag-enum" />QGraphicsItem.GraphicsItemFlag</h3><p>This enum describes different flags that you can set on an item
to toggle different features in the item's behavior.</p>
<p>All flags are disabled by default.</p>
<table class="valuelist">
<tr class="odd" valign="top">
<th class="tblConst">Constant</th>
<th class="tblval">Value</th>
<th class="tbldscr">Description</th>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemIsMovable</tt></td>
<td class="topAlign"><tt>0x1</tt></td>
<td class="topAlign">The item supports interactive movement using
the mouse. By clicking on the item and then dragging, the item will
move together with the mouse cursor. If the item has children, all
children are also moved. If the item is part of a selection, all
selected items are also moved. This feature is provided as a
convenience through the base implementation of <a href="qgraphicsitem.html">QGraphicsItem</a>'s mouse event handlers.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemIsSelectable</tt></td>
<td class="topAlign"><tt>0x2</tt></td>
<td class="topAlign">The item supports selection. Enabling this
feature will enable <a href="qgraphicsitem.html#setSelected">setSelected</a>() to toggle
selection for the item. It will also let the item be selected
automatically as a result of calling <a href="qgraphicsscene.html#setSelectionArea">QGraphicsScene.setSelectionArea</a>(),
by clicking on an item, or by using rubber band selection in
<a href="qgraphicsview.html">QGraphicsView</a>.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemIsFocusable</tt></td>
<td class="topAlign"><tt>0x4</tt></td>
<td class="topAlign">The item supports keyboard input focus (i.e.,
it is an input item). Enabling this flag will allow the item to
accept focus, which again allows the delivery of key events to
<a href="qgraphicsitem.html#keyPressEvent">QGraphicsItem.keyPressEvent</a>()
and <a href="qgraphicsitem.html#keyReleaseEvent">QGraphicsItem.keyReleaseEvent</a>().</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemClipsToShape</tt></td>
<td class="topAlign"><tt>0x8</tt></td>
<td class="topAlign">The item clips to its own shape. The item
cannot draw or receive mouse, tablet, drag and drop or hover events
outside its shape. It is disabled by default. This behavior is
enforced by <a class="obsolete" href="qgraphicsview-obsolete.html#drawItems">QGraphicsView.drawItems</a>() or <a class="obsolete" href="qgraphicsscene-obsolete.html#drawItems">QGraphicsScene.drawItems</a>(). This flag was
introduced in Qt 4.3.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemClipsChildrenToShape</tt></td>
<td class="topAlign"><tt>0x10</tt></td>
<td class="topAlign">The item clips the painting of all its
descendants to its own shape. Items that are either direct or
indirect children of this item cannot draw outside this item's
shape. By default, this flag is disabled; children can draw
anywhere. This behavior is enforced by <a class="obsolete" href="qgraphicsview-obsolete.html#drawItems">QGraphicsView.drawItems</a>() or <a class="obsolete" href="qgraphicsscene-obsolete.html#drawItems">QGraphicsScene.drawItems</a>(). This flag was
introduced in Qt 4.3.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemIgnoresTransformations</tt></td>
<td class="topAlign"><tt>0x20</tt></td>
<td class="topAlign">The item ignores inherited transformations
(i.e., its position is still anchored to its parent, but the parent
or view rotation, zoom or shear transformations are ignored). This
flag is useful for keeping text label items horizontal and
unscaled, so they will still be readable if the view is
transformed. When set, the item's view geometry and scene geometry
will be maintained separately. You must call <a href="qgraphicsitem.html#deviceTransform">deviceTransform</a>() to map
coordinates and detect collisions in the view. By default, this
flag is disabled. This flag was introduced in Qt 4.3. <b>Note:</b>
With this flag set you can still scale the item itself, and that
scale transformation will influence the item's children.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemIgnoresParentOpacity</tt></td>
<td class="topAlign"><tt>0x40</tt></td>
<td class="topAlign">The item ignores its parent's opacity. The
item's effective opacity is the same as its own; it does not
combine with the parent's opacity. This flags allows your item to
keep its absolute opacity even if the parent is semitransparent.
This flag was introduced in Qt 4.5.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemDoesntPropagateOpacityToChildren</tt></td>
<td class="topAlign"><tt>0x80</tt></td>
<td class="topAlign">The item doesn't propagate its opacity to its
children. This flag allows you to create a semitransparent item
that does not affect the opacity of its children. This flag was
introduced in Qt 4.5.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemStacksBehindParent</tt></td>
<td class="topAlign"><tt>0x100</tt></td>
<td class="topAlign">The item is stacked behind its parent. By
default, child items are stacked on top of the parent item. But
setting this flag, the child will be stacked behind it. This flag
is useful for drop shadow effects and for decoration objects that
follow the parent item's geometry without drawing on top of it.
This flag was introduced in Qt 4.5.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemUsesExtendedStyleOption</tt></td>
<td class="topAlign"><tt>0x200</tt></td>
<td class="topAlign">The item makes use of either <a href="qstyleoptiongraphicsitem.html#exposedRect-var">exposedRect</a> or
<a class="obsolete" href="qstyleoptiongraphicsitem-obsolete.html#matrix-var">matrix<sup>(obsolete)</sup></a> in <a href="qstyleoptiongraphicsitem.html">QStyleOptionGraphicsItem</a>. By
default, the <a href="qstyleoptiongraphicsitem.html#exposedRect-var">exposedRect</a> is
initialized to the item's <a href="qgraphicsitem.html#boundingRect">boundingRect</a>() and the
<a class="obsolete" href="qstyleoptiongraphicsitem-obsolete.html#matrix-var">matrix<sup>(obsolete)</sup></a> is untransformed. You
can enable this flag for the style options to be set up with more
fine-grained values. Note that <a class="obsolete" href="qstyleoptiongraphicsitem-obsolete.html#levelOfDetail-var">QStyleOptionGraphicsItem.levelOfDetail<sup>(obsolete)</sup></a>
is unaffected by this flag and always initialized to 1. Use
<a href="qstyleoptiongraphicsitem.html#levelOfDetailFromTransform">QStyleOptionGraphicsItem.levelOfDetailFromTransform</a>()
if you need a higher value. This flag was introduced in Qt
4.6.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemHasNoContents</tt></td>
<td class="topAlign"><tt>0x400</tt></td>
<td class="topAlign">The item does not paint anything (i.e.,
calling <a href="qgraphicsitem.html#paint">paint</a>() on the item
has no effect). You should set this flag on items that do not need
to be painted to ensure that Graphics View avoids unnecessary
painting preparations. This flag was introduced in Qt 4.6.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemSendsGeometryChanges</tt></td>
<td class="topAlign"><tt>0x800</tt></td>
<td class="topAlign">The item enables <a href="qgraphicsitem.html#itemChange">itemChange</a>() notifications for
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemPositionChange</a>,
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemPositionHasChanged</a>,
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemMatrixChange</a>,
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemTransformChange</a>,
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemTransformHasChanged</a>,
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemRotationChange</a>,
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemRotationHasChanged</a>,
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemScaleChange</a>,
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemScaleHasChanged</a>,
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemTransformOriginPointChange</a>,
and <a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemTransformOriginPointHasChanged</a>.
For performance reasons, these notifications are disabled by
default. You must enable this flag to receive notifications for
position and transform changes. This flag was introduced in Qt
4.6.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemAcceptsInputMethod</tt></td>
<td class="topAlign"><tt>0x1000</tt></td>
<td class="topAlign">The item supports input methods typically used
for Asian languages. This flag was introduced in Qt 4.6.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemNegativeZStacksBehindParent</tt></td>
<td class="topAlign"><tt>0x2000</tt></td>
<td class="topAlign">The item automatically stacks behind it's
parent if it's z-value is negative. This flag enables <a href="qgraphicsitem.html#setZValue">setZValue</a>() to toggle
ItemStacksBehindParent. This flag was introduced in Qt 4.6.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.ItemIsPanel</tt></td>
<td class="topAlign"><tt>0x4000</tt></td>
<td class="topAlign">The item is a panel. A panel provides
activation and contained focus handling. Only one panel can be
active at a time (see <a href="qgraphicsitem.html#isActive">QGraphicsItem.isActive</a>()). When
no panel is active, <a href="qgraphicsscene.html">QGraphicsScene</a> activates all non-panel
items. Window items (i.e., <a href="qgraphicsitem.html#isWindow">QGraphicsItem.isWindow</a>() returns
true) are panels. This flag was introduced in Qt 4.6.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QGraphicsItem.ItemSendsScenePositionChanges</tt></td>
<td class="topAlign"><tt>0x10000</tt></td>
<td class="topAlign">The item enables <a href="qgraphicsitem.html#itemChange">itemChange</a>() notifications for
<a href="qgraphicsitem.html#GraphicsItemChange-enum">ItemScenePositionHasChanged</a>.
For performance reasons, these notifications are disabled by
default. You must enable this flag to receive notifications for
scene position changes. This flag was introduced in Qt 4.6.</td>
</tr>
</table>
<p>The GraphicsItemFlags type is a typedef for <a href="qflags.html">QFlags</a><GraphicsItemFlag>. It stores an OR
combination of GraphicsItemFlag values.</p>
<h3 class="fn"><a name="PanelModality-enum" />QGraphicsItem.PanelModality</h3><p>This enum specifies the behavior of a modal panel. A modal panel
is one that blocks input to other panels. Note that items that are
children of a modal panel are not blocked.</p>
<p>The values are:</p>
<table class="valuelist">
<tr class="odd" valign="top">
<th class="tblConst">Constant</th>
<th class="tblval">Value</th>
<th class="tbldscr">Description</th>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.NonModal</tt></td>
<td class="topAlign"><tt>0</tt></td>
<td class="topAlign">The panel is not modal and does not block
input to other panels. This is the default value for panels.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.PanelModal</tt></td>
<td class="topAlign"><tt>1</tt></td>
<td class="topAlign">The panel is modal to a single item hierarchy
and blocks input to its parent pane, all grandparent panels, and
all siblings of its parent and grandparent panels.</td>
</tr>
<tr>
<td class="topAlign"><tt>QGraphicsItem.SceneModal</tt></td>
<td class="topAlign"><tt>2</tt></td>
<td class="topAlign">The window is modal to the entire scene and
blocks input to all panels.</td>
</tr>
</table>
<p>This enum was introduced or modified in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setPanelModality">QGraphicsItem.setPanelModality</a>(),
<a href="qgraphicsitem.html#panelModality">QGraphicsItem.panelModality</a>(),
and <a href="qgraphicsitem.html#GraphicsItemFlag-enum">QGraphicsItem.ItemIsPanel</a>.</p>
<hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QGraphicsItem" />QGraphicsItem.__init__ (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>parent</i> = None, <a href="qgraphicsscene.html">QGraphicsScene</a> <i>scene</i> = None)</h3><p>The <i>parent</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><p>The <i>scene</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><p>Constructs a <a href="qgraphicsitem.html">QGraphicsItem</a> with
the given <i>parent</i> item. It does not modify the parent object
returned by <a href="qobject.html#parent">QObject.parent</a>().</p>
<p>If <i>parent</i> is 0, you can add the item to a scene by
calling <a href="qgraphicsscene.html#addItem">QGraphicsScene.addItem</a>(). The
item will then become a top-level item.</p>
<p><b>See also</b> <a href="qgraphicsscene.html#addItem">QGraphicsScene.addItem</a>() and
<a href="qgraphicsitem.html#setParentItem">setParentItem</a>().</p>
<h3 class="fn"><a name="acceptDrops" />bool QGraphicsItem.acceptDrops (<i>self</i>)</h3><p>Returns true if this item can accept drag and drop events;
otherwise, returns false. By default, items do not accept drag and
drop events; items are transparent to drag and drop.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setAcceptDrops">setAcceptDrops</a>().</p>
<h3 class="fn"><a name="acceptedMouseButtons" /><a href="qt-mousebuttons.html">Qt.MouseButtons</a> QGraphicsItem.acceptedMouseButtons (<i>self</i>)</h3><p>Returns the mouse buttons that this item accepts mouse events
for. By default, all mouse buttons are accepted.</p>
<p>If an item accepts a mouse button, it will become the mouse
grabber item when a mouse press event is delivered for that mouse
button. However, if the item does not accept the button, <a href="qgraphicsscene.html">QGraphicsScene</a> will forward the mouse
events to the first item beneath it that does.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setAcceptedMouseButtons">setAcceptedMouseButtons</a>()
and <a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>().</p>
<h3 class="fn"><a name="acceptHoverEvents" />bool QGraphicsItem.acceptHoverEvents (<i>self</i>)</h3><p>Returns true if an item accepts hover events (<a href="qgraphicsscenehoverevent.html">QGraphicsSceneHoverEvent</a>);
otherwise, returns false. By default, items do not accept hover
events.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setAcceptHoverEvents">setAcceptHoverEvents</a>()
and <a href="qgraphicsitem.html#setAcceptedMouseButtons">setAcceptedMouseButtons</a>().</p>
<h3 class="fn"><a name="acceptsHoverEvents" />bool QGraphicsItem.acceptsHoverEvents (<i>self</i>)</h3><h3 class="fn"><a name="acceptTouchEvents" />bool QGraphicsItem.acceptTouchEvents (<i>self</i>)</h3><p>Returns true if an item accepts <a href="qtouchevent.html">touch
events</a>; otherwise, returns false. By default, items do not
accept touch events.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setAcceptTouchEvents">setAcceptTouchEvents</a>().</p>
<h3 class="fn"><a name="advance" />QGraphicsItem.advance (<i>self</i>, int <i>phase</i>)</h3><p>This virtual function is called twice for all items by the
<a href="qgraphicsscene.html#advance">QGraphicsScene.advance</a>()
slot. In the first phase, all items are called with <i>phase</i> ==
0, indicating that items on the scene are about to advance, and
then all items are called with <i>phase</i> == 1. Reimplement this
function to update your item if you need simple scene-controlled
animation.</p>
<p>The default implementation does nothing.</p>
<p>For individual item animation, an alternative to this function
is to either use <a href="qgraphicsitemanimation.html">QGraphicsItemAnimation</a>, or to
multiple-inherit from <a href="qobject.html">QObject</a> and
<a href="qgraphicsitem.html">QGraphicsItem</a>, and animate your
item using <a href="qobject.html#startTimer">QObject.startTimer</a>() and <a href="qobject.html#timerEvent">QObject.timerEvent</a>().</p>
<p><b>See also</b> <a href="qgraphicsitemanimation.html">QGraphicsItemAnimation</a> and
<a href="qtimeline.html">QTimeLine</a>.</p>
<h3 class="fn"><a name="boundingRect" /><a href="qrectf.html">QRectF</a> QGraphicsItem.boundingRect (<i>self</i>)</h3><p>This method is abstract and should be reimplemented in any sub-class.</p><p>This pure virtual function defines the outer bounds of the item
as a rectangle; all painting must be restricted to inside an item's
bounding rect. <a href="qgraphicsview.html">QGraphicsView</a> uses
this to determine whether the item requires redrawing.</p>
<p>Although the item's shape can be arbitrary, the bounding rect is
always rectangular, and it is unaffected by the items'
transformation.</p>
<p>If you want to change the item's bounding rectangle, you must
first call <a href="qgraphicsitem.html#prepareGeometryChange">prepareGeometryChange</a>().
This notifies the scene of the imminent change, so that its can
update its item geometry index; otherwise, the scene will be
unaware of the item's new geometry, and the results are undefined
(typically, rendering artifacts are left around in the view).</p>
<p>Reimplement this function to let <a href="qgraphicsview.html">QGraphicsView</a> determine what parts of the
widget, if any, need to be redrawn.</p>
<p>Note: For shapes that paint an outline / stroke, it is important
to include half the pen width in the bounding rect. It is not
necessary to compensate for antialiasing, though.</p>
<p>Example:</p>
<pre class="cpp">
<span class="type"><a href="qrectf.html">QRectF</a></span> CircleItem<span class="operator">.</span>boundingRect() <span class="keyword">const</span>
{
<span class="type"><a href="qtcore.html#qreal-typedef">qreal</a></span> penWidth <span class="operator">=</span> <span class="number">1</span>;
<span class="keyword">return</span> <span class="type"><a href="qrectf.html">QRectF</a></span>(<span class="operator">-</span>radius <span class="operator">-</span> penWidth <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span> <span class="operator">-</span>radius <span class="operator">-</span> penWidth <span class="operator">/</span> <span class="number">2</span><span class="operator">,</span>
diameter <span class="operator">+</span> penWidth<span class="operator">,</span> diameter <span class="operator">+</span> penWidth);
}
</pre>
<p><b>See also</b> <a href="qgraphicsitem.html#boundingRegion">boundingRegion</a>(), <a href="qgraphicsitem.html#shape">shape</a>(), <a href="qgraphicsitem.html#contains">contains</a>(), <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>, and <a href="qgraphicsitem.html#prepareGeometryChange">prepareGeometryChange</a>().</p>
<h3 class="fn"><a name="boundingRegion" /><a href="qregion.html">QRegion</a> QGraphicsItem.boundingRegion (<i>self</i>, <a href="qtransform.html">QTransform</a> <i>itemToDeviceTransform</i>)</h3><p>Returns the bounding region for this item. The coordinate space
of the returned region depends on <i>itemToDeviceTransform</i>. If
you pass an identity <a href="qtransform.html">QTransform</a> as a
parameter, this function will return a local coordinate region.</p>
<p>The bounding region describes a coarse outline of the item's
visual contents. Although it's expensive to calculate, it's also
more precise than <a href="qgraphicsitem.html#boundingRect">boundingRect</a>(), and it can
help to avoid unnecessary repainting when an item is updated. This
is particularly efficient for thin items (e.g., lines or simple
polygons). You can tune the granularity for the bounding region by
calling <a href="qgraphicsitem.html#setBoundingRegionGranularity">setBoundingRegionGranularity</a>().
The default granularity is 0; in which the item's bounding region
is the same as its bounding rect.</p>
<p><i>itemToDeviceTransform</i> is the transformation from item
coordinates to device coordinates. If you want this function to
return a <a href="qregion.html">QRegion</a> in scene coordinates,
you can pass <a href="qgraphicsitem.html#sceneTransform">sceneTransform</a>() as an
argument.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#boundingRegionGranularity">boundingRegionGranularity</a>().</p>
<h3 class="fn"><a name="boundingRegionGranularity" />float QGraphicsItem.boundingRegionGranularity (<i>self</i>)</h3><p>Returns the item's bounding region granularity; a value between
and including 0 and 1. The default value is 0 (i.e., the lowest
granularity, where the bounding region corresponds to the item's
bounding rectangle).</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setBoundingRegionGranularity">setBoundingRegionGranularity</a>().</p>
<h3 class="fn"><a name="cacheMode" /><a href="qgraphicsitem.html#CacheMode-enum">CacheMode</a> QGraphicsItem.cacheMode (<i>self</i>)</h3><p>Returns the cache mode for this item. The default mode is
<a href="qgraphicsitem.html#CacheMode-enum">NoCache</a> (i.e.,
cache is disabled and all painting is immediate).</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setCacheMode">setCacheMode</a>().</p>
<h3 class="fn"><a name="childItems" />unknown-type QGraphicsItem.childItems (<i>self</i>)</h3><p>Returns a list of this item's children.</p>
<p>The items are sorted by stacking order. This takes into account
both the items' insertion order and their Z-values.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setParentItem">setParentItem</a>(), <a href="qgraphicsitem.html#zValue">zValue</a>(), and <a href="qgraphicsitem.html#sorting">Sorting</a>.</p>
<h3 class="fn"><a name="childrenBoundingRect" /><a href="qrectf.html">QRectF</a> QGraphicsItem.childrenBoundingRect (<i>self</i>)</h3><p>Returns the bounding rect of this item's descendants (i.e., its
children, their children, etc.) in local coordinates. The rectangle
will contain all descendants after they have been mapped to local
coordinates. If the item has no children, this function returns an
empty <a href="qrectf.html">QRectF</a>.</p>
<p>This does not include this item's own bounding rect; it only
returns its descendants' accumulated bounding rect. If you need to
include this item's bounding rect, you can add <a href="qgraphicsitem.html#boundingRect">boundingRect</a>() to
childrenBoundingRect() using QRectF.operator|().</p>
<p>This function is linear in complexity; it determines the size of
the returned bounding rect by iterating through all
descendants.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#boundingRect">boundingRect</a>() and <a href="qgraphicsitem.html#sceneBoundingRect">sceneBoundingRect</a>().</p>
<h3 class="fn"><a name="clearFocus" />QGraphicsItem.clearFocus (<i>self</i>)</h3><p>Takes keyboard input focus from the item.</p>
<p>If it has focus, a <a href="qgraphicsitem.html#focusOutEvent">focus out event</a> is sent to
this item to tell it that it is about to lose the focus.</p>
<p>Only items that set the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsFocusable</a>
flag, or widgets that set an appropriate focus policy, can accept
keyboard focus.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setFocus">setFocus</a>(), <a href="qgraphicsitem.html#hasFocus">hasFocus</a>(), and <a href="qgraphicswidget.html#focusPolicy-prop">QGraphicsWidget.focusPolicy</a>.</p>
<h3 class="fn"><a name="clipPath" /><a href="qpainterpath.html">QPainterPath</a> QGraphicsItem.clipPath (<i>self</i>)</h3><p>Returns this item's clip path, or an empty <a href="qpainterpath.html">QPainterPath</a> if this item is not clipped.
The clip path constrains the item's appearance and interaction
(i.e., restricts the area the item can draw, and it also restricts
the area that the item receives events).</p>
<p>You can enable clipping by setting the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemClipsToShape</a> or
<a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemClipsChildrenToShape</a>
flags. The item's clip path is calculated by intersecting all
clipping ancestors' shapes. If the item sets <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemClipsToShape</a>,
the final clip is intersected with the item's own shape.</p>
<p><b>Note:</b> Clipping introduces a performance penalty for all
items involved; you should generally avoid using clipping if you
can (e.g., if your items always draw inside <a href="qgraphicsitem.html#boundingRect">boundingRect</a>() or <a href="qgraphicsitem.html#shape">shape</a>() boundaries, clipping is not
necessary).</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isClipped">isClipped</a>(), <a href="qgraphicsitem.html#shape">shape</a>(), and <a href="qgraphicsitem.html#setFlags">setFlags</a>().</p>
<h3 class="fn"><a name="collidesWithItem" />bool QGraphicsItem.collidesWithItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>other</i>, <a href="qt.html#ItemSelectionMode-enum">Qt.ItemSelectionMode</a> <i>mode</i> = Qt.IntersectsItemShape)</h3><p>Returns true if this item collides with <i>other</i>; otherwise
returns false.</p>
<p>The <i>mode</i> is applied to <i>other</i>, and the resulting
shape or bounding rectangle is then compared to this item's shape.
The default value for <i>mode</i> is <a href="qt.html#ItemSelectionMode-enum">Qt.IntersectsItemShape</a>;
<i>other</i> collides with this item if it either intersects,
contains, or is contained by this item's shape (see <a href="qt.html#ItemSelectionMode-enum">Qt.ItemSelectionMode</a> for
details).</p>
<p>The default implementation is based on shape intersection, and
it calls <a href="qgraphicsitem.html#shape">shape</a>() on both
items. Because the complexity of arbitrary shape-shape intersection
grows with an order of magnitude when the shapes are complex, this
operation can be noticably time consuming. You have the option of
reimplementing this function in a subclass of <a href="qgraphicsitem.html">QGraphicsItem</a> to provide a custom
algorithm. This allows you to make use of natural constraints in
the shapes of your own items, in order to improve the performance
of the collision detection. For instance, two untransformed
perfectly circular items' collision can be determined very
efficiently by comparing their positions and radii.</p>
<p>Keep in mind that when reimplementing this function and calling
<a href="qgraphicsitem.html#shape">shape</a>() or <a href="qgraphicsitem.html#boundingRect">boundingRect</a>() on
<i>other</i>, the returned coordinates must be mapped to this
item's coordinate system before any intersection can take
place.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#contains">contains</a>() and <a href="qgraphicsitem.html#shape">shape</a>().</p>
<h3 class="fn"><a name="collidesWithPath" />bool QGraphicsItem.collidesWithPath (<i>self</i>, <a href="qpainterpath.html">QPainterPath</a> <i>path</i>, <a href="qt.html#ItemSelectionMode-enum">Qt.ItemSelectionMode</a> <i>mode</i> = Qt.IntersectsItemShape)</h3><p>Returns true if this item collides with <i>path</i>.</p>
<p>The collision is determined by <i>mode</i>. The default value
for <i>mode</i> is <a href="qt.html#ItemSelectionMode-enum">Qt.IntersectsItemShape</a>;
<i>path</i> collides with this item if it either intersects,
contains, or is contained by this item's shape.</p>
<p>Note that this function checks whether the item's shape or
bounding rectangle (depending on <i>mode</i>) is contained within
<i>path</i>, and not whether <i>path</i> is contained within the
items shape or bounding rectangle.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#collidesWithItem">collidesWithItem</a>(),
<a href="qgraphicsitem.html#contains">contains</a>(), and <a href="qgraphicsitem.html#shape">shape</a>().</p>
<h3 class="fn"><a name="collidingItems" />unknown-type QGraphicsItem.collidingItems (<i>self</i>, <a href="qt.html#ItemSelectionMode-enum">Qt.ItemSelectionMode</a> <i>mode</i> = Qt.IntersectsItemShape)</h3><p>Returns a list of all items that collide with this item.</p>
<p>The way collisions are detected is determined by applying
<i>mode</i> to items that are compared to this item, i.e., each
item's shape or bounding rectangle is checked against this item's
shape. The default value for <i>mode</i> is <a href="qt.html#ItemSelectionMode-enum">Qt.IntersectsItemShape</a>.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#collidesWithItem">collidesWithItem</a>().</p>
<h3 class="fn"><a name="commonAncestorItem" /><a href="qgraphicsitem.html">QGraphicsItem</a> QGraphicsItem.commonAncestorItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>other</i>)</h3><p>Returns the closest common ancestor item of this item and
<i>other</i>, or 0 if either <i>other</i> is 0, or there is no
common ancestor.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isAncestorOf">isAncestorOf</a>().</p>
<h3 class="fn"><a name="contains" />bool QGraphicsItem.contains (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>point</i>)</h3><p>Returns true if this item contains <i>point</i>, which is in
local coordinates; otherwise, false is returned. It is most often
called from <a href="qgraphicsview.html">QGraphicsView</a> to
determine what item is under the cursor, and for that reason, the
implementation of this function should be as light-weight as
possible.</p>
<p>By default, this function calls <a href="qgraphicsitem.html#shape">shape</a>(), but you can reimplement it
in a subclass to provide a (perhaps more efficient)
implementation.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#shape">shape</a>(),
<a href="qgraphicsitem.html#boundingRect">boundingRect</a>(), and
<a href="qgraphicsitem.html#collidesWithPath">collidesWithPath</a>().</p>
<h3 class="fn"><a name="contextMenuEvent" />QGraphicsItem.contextMenuEvent (<i>self</i>, <a href="qgraphicsscenecontextmenuevent.html">QGraphicsSceneContextMenuEvent</a> <i>event</i>)</h3><p>This event handler can be reimplemented in a subclass to process
context menu events. The <i>event</i> parameter contains details
about the event to be handled.</p>
<p>If you ignore the event, (i.e., by calling <a href="qevent.html#ignore">QEvent.ignore</a>(),) <i>event</i> will
propagate to any item beneath this item. If no items accept the
event, it will be ignored by the scene, and propagate to the
view.</p>
<p>It's common to open a <a href="qmenu.html">QMenu</a> in response
to receiving a context menu event. Example:</p>
<pre class="cpp">
<span class="type">void</span> CustomItem<span class="operator">.</span>contextMenuEvent(<span class="type"><a href="qgraphicsscenecontextmenuevent.html">QGraphicsSceneContextMenuEvent</a></span> <span class="operator">*</span>event)
{
<span class="type"><a href="qmenu.html">QMenu</a></span> menu;
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>removeAction <span class="operator">=</span> menu<span class="operator">.</span>addAction(<span class="string">"Remove"</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>markAction <span class="operator">=</span> menu<span class="operator">.</span>addAction(<span class="string">"Mark"</span>);
<span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>selectedAction <span class="operator">=</span> menu<span class="operator">.</span>exec(event<span class="operator">-</span><span class="operator">></span>screenPos());
<span class="comment">// ...</span>
}
</pre>
<p>The default implementation ignores the event.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="cursor" /><a href="qcursor.html">QCursor</a> QGraphicsItem.cursor (<i>self</i>)</h3><p>Returns the current cursor shape for the item. The mouse cursor
will assume this shape when it's over this item. See the <a href="qt.html#CursorShape-enum">list of predefined cursor objects</a>
for a range of useful shapes.</p>
<p>An editor item might want to use an I-beam cursor:</p>
<pre class="cpp">
item<span class="operator">-</span><span class="operator">></span><a href="qgraphicsitem.html#setCursor">setCursor</a>(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">.</span>IBeamCursor);
</pre>
<p>If no cursor has been set, the cursor of the item beneath is
used.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setCursor">setCursor</a>(), <a href="qgraphicsitem.html#hasCursor">hasCursor</a>(), <a href="qgraphicsitem.html#unsetCursor">unsetCursor</a>(), <a href="qwidget.html#cursor-prop">QWidget.cursor</a>, and <a href="qapplication.html#overrideCursor">QApplication.overrideCursor</a>().</p>
<h3 class="fn"><a name="data" />QVariant QGraphicsItem.data (<i>self</i>, int <i>key</i>)</h3><p>Returns this item's custom data for the key <i>key</i> as a
<a href="qvariant.html">QVariant</a>.</p>
<p>Custom item data is useful for storing arbitrary properties in
any item. Example:</p>
<pre class="cpp">
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type">int</span> ObjectName <span class="operator">=</span> <span class="number">0</span>;
<span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span> <span class="operator">*</span>item <span class="operator">=</span> scene<span class="operator">.</span>itemAt(<span class="number">100</span><span class="operator">,</span> <span class="number">50</span>);
<span class="keyword">if</span> (item<span class="operator">-</span><span class="operator">></span>data(ObjectName)<span class="operator">.</span>toString()<span class="operator">.</span>isEmpty()) {
<span class="keyword">if</span> (qgraphicsitem_cast<span class="operator"><</span>ButtonItem <span class="operator">*</span><span class="operator">></span>(item))
item<span class="operator">-</span><span class="operator">></span>setData(ObjectName<span class="operator">,</span> <span class="string">"Button"</span>);
}
</pre>
<p>Qt does not use this feature for storing data; it is provided
solely for the convenience of the user.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setData">setData</a>().</p>
<h3 class="fn"><a name="deviceTransform" /><a href="qtransform.html">QTransform</a> QGraphicsItem.deviceTransform (<i>self</i>, <a href="qtransform.html">QTransform</a> <i>viewportTransform</i>)</h3><p>Returns this item's device transformation matrix, using
<i>viewportTransform</i> to map from scene to device coordinates.
This matrix can be used to map coordinates and geometrical shapes
from this item's local coordinate system to the viewport's (or any
device's) coordinate system. To map coordinates from the viewport,
you must first invert the returned matrix.</p>
<p>Example:</p>
<pre class="cpp">
<span class="type"><a href="qgraphicsrectitem.html">QGraphicsRectItem</a></span> rect;
rect<span class="operator">.</span><a href="qgraphicsitem.html#setPos">setPos</a>(<span class="number">100</span><span class="operator">,</span> <span class="number">100</span>);
rect<span class="operator">.</span>deviceTransform(view<span class="operator">-</span><span class="operator">></span>viewportTransform())<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>));
<span class="comment">// returns the item's (0, 0) point in view's viewport coordinates</span>
rect<span class="operator">.</span>deviceTransform(view<span class="operator">-</span><span class="operator">></span>viewportTransform())<span class="operator">.</span>inverted()<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">100</span><span class="operator">,</span> <span class="number">100</span>));
<span class="comment">// returns view's viewport's (100, 100) coordinate in item coordinates</span>
</pre>
<p>This function is the same as combining this item's scene
transform with the view's viewport transform, but it also
understands the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIgnoresTransformations</a>
flag. The device transform can be used to do accurate coordinate
mapping (and collision detection) for untransformable items.</p>
<p>This function was introduced in Qt 4.3.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#transform">transform</a>(), <a href="qgraphicsitem.html#setTransform">setTransform</a>(), <a href="qgraphicsitem.html#scenePos">scenePos</a>(), <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>, and <a href="qgraphicsitem.html#itemTransform">itemTransform</a>().</p>
<h3 class="fn"><a name="dragEnterEvent" />QGraphicsItem.dragEnterEvent (<i>self</i>, <a href="qgraphicsscenedragdropevent.html">QGraphicsSceneDragDropEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive drag enter events for this item. Drag enter events are
generated as the cursor enters the item's area.</p>
<p>By accepting the event, (i.e., by calling <a href="qevent.html#accept">QEvent.accept</a>(),) the item will accept
drop events, in addition to receiving drag move and drag leave.
Otherwise, the event will be ignored and propagate to the item
beneath. If the event is accepted, the item will receive a drag
move event before control goes back to the event loop.</p>
<p>A common implementation of dragEnterEvent accepts or ignores
<i>event</i> depending on the associated mime data in <i>event</i>.
Example:</p>
<pre class="cpp">
CustomItem<span class="operator">.</span>CustomItem()
{
setAcceptDrops(<span class="keyword">true</span>);
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
}
<span class="type">void</span> CustomItem<span class="operator">.</span>dragEnterEvent(<span class="type"><a href="qgraphicsscenedragdropevent.html">QGraphicsSceneDragDropEvent</a></span> <span class="operator">*</span>event)
{
event<span class="operator">-</span><span class="operator">></span>setAccepted(event<span class="operator">-</span><span class="operator">></span>mimeData()<span class="operator">-</span><span class="operator">></span>hasFormat(<span class="string">"text/plain"</span>));
}
</pre>
<p>Items do not receive drag and drop events by default; to enable
this feature, call <tt>setAcceptDrops(true)</tt>.</p>
<p>The default implementation does nothing.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#dropEvent">dropEvent</a>(), <a href="qgraphicsitem.html#dragMoveEvent">dragMoveEvent</a>(), and
<a href="qgraphicsitem.html#dragLeaveEvent">dragLeaveEvent</a>().</p>
<h3 class="fn"><a name="dragLeaveEvent" />QGraphicsItem.dragLeaveEvent (<i>self</i>, <a href="qgraphicsscenedragdropevent.html">QGraphicsSceneDragDropEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive drag leave events for this item. Drag leave events are
generated as the cursor leaves the item's area. Most often you will
not need to reimplement this function, but it can be useful for
resetting state in your item (e.g., highlighting).</p>
<p>Calling <a href="qevent.html#ignore">QEvent.ignore</a>() or
<a href="qevent.html#accept">QEvent.accept</a>() on <i>event</i>
has no effect.</p>
<p>Items do not receive drag and drop events by default; to enable
this feature, call <tt>setAcceptDrops(true)</tt>.</p>
<p>The default implementation does nothing.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#dragEnterEvent">dragEnterEvent</a>(), <a href="qgraphicsitem.html#dropEvent">dropEvent</a>(), and <a href="qgraphicsitem.html#dragMoveEvent">dragMoveEvent</a>().</p>
<h3 class="fn"><a name="dragMoveEvent" />QGraphicsItem.dragMoveEvent (<i>self</i>, <a href="qgraphicsscenedragdropevent.html">QGraphicsSceneDragDropEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive drag move events for this item. Drag move events are
generated as the cursor moves around inside the item's area. Most
often you will not need to reimplement this function; it is used to
indicate that only parts of the item can accept drops.</p>
<p>Calling <a href="qevent.html#ignore">QEvent.ignore</a>() or
<a href="qevent.html#accept">QEvent.accept</a>() on <i>event</i>
toggles whether or not the item will accept drops at the position
from the event. By default, <i>event</i> is accepted, indicating
that the item allows drops at the specified position.</p>
<p>Items do not receive drag and drop events by default; to enable
this feature, call <tt>setAcceptDrops(true)</tt>.</p>
<p>The default implementation does nothing.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#dropEvent">dropEvent</a>(), <a href="qgraphicsitem.html#dragEnterEvent">dragEnterEvent</a>(), and
<a href="qgraphicsitem.html#dragLeaveEvent">dragLeaveEvent</a>().</p>
<h3 class="fn"><a name="dropEvent" />QGraphicsItem.dropEvent (<i>self</i>, <a href="qgraphicsscenedragdropevent.html">QGraphicsSceneDragDropEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive drop events for this item. Items can only receive drop
events if the last drag move event was accepted.</p>
<p>Calling <a href="qevent.html#ignore">QEvent.ignore</a>() or
<a href="qevent.html#accept">QEvent.accept</a>() on <i>event</i>
has no effect.</p>
<p>Items do not receive drag and drop events by default; to enable
this feature, call <tt>setAcceptDrops(true)</tt>.</p>
<p>The default implementation does nothing.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#dragEnterEvent">dragEnterEvent</a>(), <a href="qgraphicsitem.html#dragMoveEvent">dragMoveEvent</a>(), and
<a href="qgraphicsitem.html#dragLeaveEvent">dragLeaveEvent</a>().</p>
<h3 class="fn"><a name="effectiveOpacity" />float QGraphicsItem.effectiveOpacity (<i>self</i>)</h3><p>Returns this item's <i>effective</i> opacity, which is between
0.0 (transparent) and 1.0 (opaque). This value is a combination of
this item's local opacity, and its parent and ancestors' opacities.
The effective opacity decides how the item is rendered.</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#opacity">opacity</a>(), <a href="qgraphicsitem.html#setOpacity">setOpacity</a>(), <a href="qgraphicsitem.html#paint">paint</a>(), <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIgnoresParentOpacity</a>,
and <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemDoesntPropagateOpacityToChildren</a>.</p>
<h3 class="fn"><a name="ensureVisible" />QGraphicsItem.ensureVisible (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i> = QRectF(), int <i>xMargin</i> = 50, int <i>yMargin</i> = 50)</h3><p>If this item is part of a scene that is viewed by a <a href="qgraphicsview.html">QGraphicsView</a>, this convenience function
will attempt to scroll the view to ensure that <i>rect</i> is
visible inside the view's viewport. If <i>rect</i> is a null rect
(the default), <a href="qgraphicsitem.html">QGraphicsItem</a> will
default to the item's bounding rect. <i>xmargin</i> and
<i>ymargin</i> are the number of pixels the view should use for
margins.</p>
<p>If the specified rect cannot be reached, the contents are
scrolled to the nearest valid position.</p>
<p>If this item is not viewed by a <a href="qgraphicsview.html">QGraphicsView</a>, this function does
nothing.</p>
<p><b>See also</b> <a href="qgraphicsview.html#ensureVisible">QGraphicsView.ensureVisible</a>().</p>
<h3 class="fn"><a name="ensureVisible-2" />QGraphicsItem.ensureVisible (<i>self</i>, float <i>x</i>, float <i>y</i>, float <i>w</i>, float <i>h</i>, int <i>xMargin</i> = 50, int <i>yMargin</i> = 50)</h3><p>This convenience function is equivalent to calling
ensureVisible(<a href="qrectf.html">QRectF</a>(<i>x</i>, <i>y</i>,
<i>w</i>, <i>h</i>), <i>xmargin</i>, <i>ymargin</i>):</p>
<h3 class="fn"><a name="filtersChildEvents" />bool QGraphicsItem.filtersChildEvents (<i>self</i>)</h3><p>Returns true if this item filters child events (i.e., all events
intended for any of its children are instead sent to this item);
otherwise, false is returned.</p>
<p>The default value is false; child events are not filtered.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setFiltersChildEvents">setFiltersChildEvents</a>().</p>
<h3 class="fn"><a name="flags" /><a href="qgraphicsitem-graphicsitemflags.html">GraphicsItemFlags</a> QGraphicsItem.flags (<i>self</i>)</h3><p>Returns this item's flags. The flags describe what configurable
features of the item are enabled and not. For example, if the flags
include <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsFocusable</a>, the
item can accept input focus.</p>
<p>By default, no flags are enabled.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setFlags">setFlags</a>() and <a href="qgraphicsitem.html#setFlag">setFlag</a>().</p>
<h3 class="fn"><a name="focusInEvent" />QGraphicsItem.focusInEvent (<i>self</i>, <a href="qfocusevent.html">QFocusEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive focus in events for this item. The default
implementation calls <a href="qgraphicsitem.html#ensureVisible">ensureVisible</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#focusOutEvent">focusOutEvent</a>(), <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>(), and <a href="qgraphicsitem.html#setFocus">setFocus</a>().</p>
<h3 class="fn"><a name="focusItem" /><a href="qgraphicsitem.html">QGraphicsItem</a> QGraphicsItem.focusItem (<i>self</i>)</h3><p>If this item, a child or descendant of this item currently has
input focus, this function will return a pointer to that item. If
no descendant has input focus, 0 is returned.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#hasFocus">hasFocus</a>(), <a href="qgraphicsitem.html#setFocus">setFocus</a>(), and <a href="qwidget.html#focusWidget">QWidget.focusWidget</a>().</p>
<h3 class="fn"><a name="focusOutEvent" />QGraphicsItem.focusOutEvent (<i>self</i>, <a href="qfocusevent.html">QFocusEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive focus out events for this item. The default
implementation does nothing.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#focusInEvent">focusInEvent</a>(), <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>(), and <a href="qgraphicsitem.html#setFocus">setFocus</a>().</p>
<h3 class="fn"><a name="focusProxy" /><a href="qgraphicsitem.html">QGraphicsItem</a> QGraphicsItem.focusProxy (<i>self</i>)</h3><p>Returns this item's focus proxy, or 0 if this item has no focus
proxy.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setFocusProxy">setFocusProxy</a>(), <a href="qgraphicsitem.html#setFocus">setFocus</a>(), and <a href="qgraphicsitem.html#hasFocus">hasFocus</a>().</p>
<h3 class="fn"><a name="grabKeyboard" />QGraphicsItem.grabKeyboard (<i>self</i>)</h3><p>Grabs the keyboard input.</p>
<p>The item will receive all keyboard input to the scene until one
of the following events occur:</p>
<ul>
<li>The item becomes invisible</li>
<li>The item is removed from the scene</li>
<li>The item is deleted</li>
<li>The item calls <a href="qgraphicsitem.html#ungrabKeyboard">ungrabKeyboard</a>()</li>
<li>Another item calls grabKeyboard(); the item will regain the
keyboard grab when the other item calls <a href="qgraphicsitem.html#ungrabKeyboard">ungrabKeyboard</a>().</li>
</ul>
<p>When an item gains the keyboard grab, it receives a <a href="qevent.html#Type-enum">QEvent.GrabKeyboard</a> event. When it
loses the keyboard grab, it receives a <a href="qevent.html#Type-enum">QEvent.UngrabKeyboard</a> event. These
events can be used to detect when your item gains or loses the
keyboard grab through other means than gaining input focus.</p>
<p>It is almost never necessary to explicitly grab the keyboard in
Qt, as Qt grabs and releases it sensibly. In particular, Qt grabs
the keyboard when your item gains input focus, and releases it when
your item loses input focus, or when the item is hidden.</p>
<p>Note that only visible items can grab keyboard input. Calling
grabKeyboard() on an invisible item has no effect.</p>
<p>Keyboard events are not affected.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#ungrabKeyboard">ungrabKeyboard</a>(), <a href="qgraphicsitem.html#grabMouse">grabMouse</a>(), and <a href="qgraphicsitem.html#setFocus">setFocus</a>().</p>
<h3 class="fn"><a name="grabMouse" />QGraphicsItem.grabMouse (<i>self</i>)</h3><p>Grabs the mouse input.</p>
<p>This item will receive all mouse events for the scene until any
of the following events occurs:</p>
<ul>
<li>The item becomes invisible</li>
<li>The item is removed from the scene</li>
<li>The item is deleted</li>
<li>The item call <a href="qgraphicsitem.html#ungrabMouse">ungrabMouse</a>()</li>
<li>Another item calls grabMouse(); the item will regain the mouse
grab when the other item calls <a href="qgraphicsitem.html#ungrabMouse">ungrabMouse</a>().</li>
</ul>
<p>When an item gains the mouse grab, it receives a <a href="qevent.html#Type-enum">QEvent.GrabMouse</a> event. When it loses
the mouse grab, it receives a <a href="qevent.html#Type-enum">QEvent.UngrabMouse</a> event. These events
can be used to detect when your item gains or loses the mouse grab
through other means than receiving mouse button events.</p>
<p>It is almost never necessary to explicitly grab the mouse in Qt,
as Qt grabs and releases it sensibly. In particular, Qt grabs the
mouse when you press a mouse button, and keeps the mouse grabbed
until you release the last mouse button. Also, <a href="qt.html#WindowType-enum">Qt.Popup</a> widgets implicitly call
grabMouse() when shown, and <a href="qgraphicsitem.html#ungrabMouse">ungrabMouse</a>() when hidden.</p>
<p>Note that only visible items can grab mouse input. Calling
grabMouse() on an invisible item has no effect.</p>
<p>Keyboard events are not affected.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsscene.html#mouseGrabberItem">QGraphicsScene.mouseGrabberItem</a>(),
<a href="qgraphicsitem.html#ungrabMouse">ungrabMouse</a>(), and
<a href="qgraphicsitem.html#grabKeyboard">grabKeyboard</a>().</p>
<h3 class="fn"><a name="graphicsEffect" /><a href="qgraphicseffect.html">QGraphicsEffect</a> QGraphicsItem.graphicsEffect (<i>self</i>)</h3><p>Returns a pointer to this item's effect if it has one; otherwise
0.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setGraphicsEffect">setGraphicsEffect</a>().</p>
<h3 class="fn"><a name="group" /><a href="qgraphicsitemgroup.html">QGraphicsItemGroup</a> QGraphicsItem.group (<i>self</i>)</h3><p>Returns a pointer to this item's item group, or 0 if this item
is not member of a group.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setGroup">setGroup</a>(), <a href="qgraphicsitemgroup.html">QGraphicsItemGroup</a>, and <a href="qgraphicsscene.html#createItemGroup">QGraphicsScene.createItemGroup</a>().</p>
<h3 class="fn"><a name="handlesChildEvents" />bool QGraphicsItem.handlesChildEvents (<i>self</i>)</h3><h3 class="fn"><a name="hasCursor" />bool QGraphicsItem.hasCursor (<i>self</i>)</h3><p>Returns true if this item has a cursor set; otherwise, false is
returned.</p>
<p>By default, items don't have any cursor set. <a href="qgraphicsitem.html#cursor">cursor</a>() will return a standard
pointing arrow cursor.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#unsetCursor">unsetCursor</a>().</p>
<h3 class="fn"><a name="hasFocus" />bool QGraphicsItem.hasFocus (<i>self</i>)</h3><p>Returns true if this item is active, and it or its <a href="qgraphicsitem.html#focusProxy">focus proxy</a> has keyboard input
focus; otherwise, returns false.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#focusItem">focusItem</a>(), <a href="qgraphicsitem.html#setFocus">setFocus</a>(), <a href="qgraphicsscene.html#setFocusItem">QGraphicsScene.setFocusItem</a>(),
and <a href="qgraphicsitem.html#isActive">isActive</a>().</p>
<h3 class="fn"><a name="hide" />QGraphicsItem.hide (<i>self</i>)</h3><p>Hides the item. (Items are visible by default.)</p>
<p>This convenience function is equivalent to calling
<tt>setVisible(false)</tt>.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#show">show</a>() and
<a href="qgraphicsitem.html#setVisible">setVisible</a>().</p>
<h3 class="fn"><a name="hoverEnterEvent" />QGraphicsItem.hoverEnterEvent (<i>self</i>, <a href="qgraphicsscenehoverevent.html">QGraphicsSceneHoverEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive hover enter events for this item. The default
implementation calls <a href="qgraphicsitem.html#update">update</a>(); otherwise it does
nothing.</p>
<p>Calling <a href="qevent.html#ignore">QEvent.ignore</a>() or
<a href="qevent.html#accept">QEvent.accept</a>() on <i>event</i>
has no effect.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#hoverMoveEvent">hoverMoveEvent</a>(), <a href="qgraphicsitem.html#hoverLeaveEvent">hoverLeaveEvent</a>(),
<a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>(), and
<a href="qgraphicsitem.html#setAcceptHoverEvents">setAcceptHoverEvents</a>().</p>
<h3 class="fn"><a name="hoverLeaveEvent" />QGraphicsItem.hoverLeaveEvent (<i>self</i>, <a href="qgraphicsscenehoverevent.html">QGraphicsSceneHoverEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive hover leave events for this item. The default
implementation calls <a href="qgraphicsitem.html#update">update</a>(); otherwise it does
nothing.</p>
<p>Calling <a href="qevent.html#ignore">QEvent.ignore</a>() or
<a href="qevent.html#accept">QEvent.accept</a>() on <i>event</i>
has no effect.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#hoverEnterEvent">hoverEnterEvent</a>(),
<a href="qgraphicsitem.html#hoverMoveEvent">hoverMoveEvent</a>(),
<a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>(), and
<a href="qgraphicsitem.html#setAcceptHoverEvents">setAcceptHoverEvents</a>().</p>
<h3 class="fn"><a name="hoverMoveEvent" />QGraphicsItem.hoverMoveEvent (<i>self</i>, <a href="qgraphicsscenehoverevent.html">QGraphicsSceneHoverEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive hover move events for this item. The default
implementation does nothing.</p>
<p>Calling <a href="qevent.html#ignore">QEvent.ignore</a>() or
<a href="qevent.html#accept">QEvent.accept</a>() on <i>event</i>
has no effect.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#hoverEnterEvent">hoverEnterEvent</a>(),
<a href="qgraphicsitem.html#hoverLeaveEvent">hoverLeaveEvent</a>(),
<a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>(), and
<a href="qgraphicsitem.html#setAcceptHoverEvents">setAcceptHoverEvents</a>().</p>
<h3 class="fn"><a name="inputMethodEvent" />QGraphicsItem.inputMethodEvent (<i>self</i>, <a href="qinputmethodevent.html">QInputMethodEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive input method events for this item. The default
implementation ignores the event.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#inputMethodQuery">inputMethodQuery</a>() and
<a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="inputMethodHints" /><a href="qt-inputmethodhints.html">Qt.InputMethodHints</a> QGraphicsItem.inputMethodHints (<i>self</i>)</h3><p>Returns the current input method hints of this item.</p>
<p>Input method hints are only relevant for input items. The hints
are used by the input method to indicate how it should operate. For
example, if the Qt.ImhNumbersOnly flag is set, the input method
may change its visual components to reflect that only numbers can
be entered.</p>
<p>The effect may vary between input method implementations.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setInputMethodHints">setInputMethodHints</a>(),
<a href="qgraphicsitem.html#inputMethodQuery">inputMethodQuery</a>(), and
<a href="qinputcontext.html">QInputContext</a>.</p>
<h3 class="fn"><a name="inputMethodQuery" />QVariant QGraphicsItem.inputMethodQuery (<i>self</i>, <a href="qt.html#InputMethodQuery-enum">Qt.InputMethodQuery</a> <i>query</i>)</h3><p>This method is only relevant for input items. It is used by the
input method to query a set of properties of the item to be able to
support complex input method operations, such as support for
surrounding text and reconversions. <i>query</i> specifies which
property is queried.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#inputMethodEvent">inputMethodEvent</a>(),
<a href="qinputmethodevent.html">QInputMethodEvent</a>, and
<a href="qinputcontext.html">QInputContext</a>.</p>
<h3 class="fn"><a name="installSceneEventFilter" />QGraphicsItem.installSceneEventFilter (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>filterItem</i>)</h3><p>Installs an event filter for this item on <i>filterItem</i>,
causing all events for this item to first pass through
<i>filterItem</i>'s <a href="qgraphicsitem.html#sceneEventFilter">sceneEventFilter</a>()
function.</p>
<p>To filter another item's events, install this item as an event
filter for the other item. Example:</p>
<pre class="cpp">
<span class="type"><a href="qgraphicsscene.html">QGraphicsScene</a></span> scene;
<span class="type"><a href="qgraphicsellipseitem.html">QGraphicsEllipseItem</a></span> <span class="operator">*</span>ellipse <span class="operator">=</span> scene<span class="operator">.</span>addEllipse(<span class="type"><a href="qrectf.html">QRectF</a></span>(<span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="number">20</span><span class="operator">,</span> <span class="number">20</span>));
<span class="type"><a href="qgraphicslineitem.html">QGraphicsLineItem</a></span> <span class="operator">*</span>line <span class="operator">=</span> scene<span class="operator">.</span>addLine(<span class="type"><a href="qlinef.html">QLineF</a></span>(<span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="number">20</span><span class="operator">,</span> <span class="number">20</span>));
line<span class="operator">-</span><span class="operator">></span>installSceneEventFilter(ellipse);
<span class="comment">// line's events are filtered by ellipse's sceneEventFilter() function.</span>
ellipse<span class="operator">-</span><span class="operator">></span>installSceneEventFilter(line);
<span class="comment">// ellipse's events are filtered by line's sceneEventFilter() function.</span>
</pre>
<p>An item can only filter events for other items in the same
scene. Also, an item cannot filter its own events; instead, you can
reimplement <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>() directly.</p>
<p>Items must belong to a scene for scene event filters to be
installed and used.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#removeSceneEventFilter">removeSceneEventFilter</a>(),
<a href="qgraphicsitem.html#sceneEventFilter">sceneEventFilter</a>(), and
<a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="isActive" />bool QGraphicsItem.isActive (<i>self</i>)</h3><p>Returns true if this item is active; otherwise returns
false.</p>
<p>An item can only be active if the scene is active. An item is
active if it is, or is a descendent of, an active panel. Items in
non-active panels are not active.</p>
<p>Items that are not part of a panel follow scene activation when
the scene has no active panel.</p>
<p>Only active items can gain input focus.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsscene.html#isActive">QGraphicsScene.isActive</a>(),
<a href="qgraphicsscene.html#activePanel">QGraphicsScene.activePanel</a>(),
<a href="qgraphicsitem.html#panel">panel</a>(), and <a href="qgraphicsitem.html#isPanel">isPanel</a>().</p>
<h3 class="fn"><a name="isAncestorOf" />bool QGraphicsItem.isAncestorOf (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>child</i>)</h3><p>Returns true if this item is an ancestor of <i>child</i> (i.e.,
if this item is <i>child</i>'s parent, or one of <i>child</i>'s
parent's ancestors).</p>
<p><b>See also</b> <a href="qgraphicsitem.html#parentItem">parentItem</a>().</p>
<h3 class="fn"><a name="isBlockedByModalPanel" />(bool, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>blockingPanel</i>) QGraphicsItem.isBlockedByModalPanel (<i>self</i>)</h3><p>Returns true if this item is blocked by a modal panel, false
otherwise. If <i>blockingPanel</i> is non-zero,
<i>blockingPanel</i> will be set to the modal panel that is
blocking this item. If this item is not blocked,
<i>blockingPanel</i> will not be set by this function.</p>
<p>This function always returns false for items not in a scene.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#panelModality">panelModality</a>(), <a href="qgraphicsitem.html#setPanelModality">setPanelModality</a>(), and
<a href="qgraphicsitem.html#PanelModality-enum">PanelModality</a>.</p>
<h3 class="fn"><a name="isClipped" />bool QGraphicsItem.isClipped (<i>self</i>)</h3><p>Returns true if this item is clipped. An item is clipped if it
has either set the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemClipsToShape</a>
flag, or if it or any of its ancestors has set the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemClipsChildrenToShape</a>
flag.</p>
<p>Clipping affects the item's appearance (i.e., painting), as well
as mouse and hover event delivery.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#clipPath">clipPath</a>(), <a href="qgraphicsitem.html#shape">shape</a>(), and <a href="qgraphicsitem.html#setFlags">setFlags</a>().</p>
<h3 class="fn"><a name="isEnabled" />bool QGraphicsItem.isEnabled (<i>self</i>)</h3><p>Returns true if the item is enabled; otherwise, false is
returned.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setEnabled">setEnabled</a>().</p>
<h3 class="fn"><a name="isObscured" />bool QGraphicsItem.isObscured (<i>self</i>)</h3><p>Returns true if this item's bounding rect is completely obscured
by the opaque shape of any of colliding items above it (i.e., with
a higher Z value than this item).</p>
<p>Its implementation is based on calling <a href="qgraphicsitem.html#isObscuredBy">isObscuredBy</a>(), which you can
reimplement to provide a custom obscurity algorithm.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#opaqueArea">opaqueArea</a>().</p>
<h3 class="fn"><a name="isObscured-2" />bool QGraphicsItem.isObscured (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>This convenience function is equivalent to calling
isObscured(<a href="qrectf.html">QRectF</a>(<i>x</i>, <i>y</i>,
<i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.3.</p>
<h3 class="fn"><a name="isObscured-3" />bool QGraphicsItem.isObscured (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This is an overloaded function.</p>
<p>Returns true if <i>rect</i> is completely obscured by the opaque
shape of any of colliding items above it (i.e., with a higher Z
value than this item).</p>
<p>Unlike the default <a href="qgraphicsitem.html#isObscured">isObscured</a>() function, this
function does not call <a href="qgraphicsitem.html#isObscuredBy">isObscuredBy</a>().</p>
<p>This function was introduced in Qt 4.3.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#opaqueArea">opaqueArea</a>().</p>
<h3 class="fn"><a name="isObscuredBy" />bool QGraphicsItem.isObscuredBy (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>)</h3><p>Returns true if this item's bounding rect is completely obscured
by the opaque shape of <i>item</i>.</p>
<p>The base implementation maps <i>item</i>'s <a href="qgraphicsitem.html#opaqueArea">opaqueArea</a>() to this item's
coordinate system, and then checks if this item's <a href="qgraphicsitem.html#boundingRect">boundingRect</a>() is fully
contained within the mapped shape.</p>
<p>You can reimplement this function to provide a custom algorithm
for determining whether this item is obscured by <i>item</i>.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#opaqueArea">opaqueArea</a>() and <a href="qgraphicsitem.html#isObscured">isObscured</a>().</p>
<h3 class="fn"><a name="isPanel" />bool QGraphicsItem.isPanel (<i>self</i>)</h3><p>Returns true if the item is a panel; otherwise returns
false.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#panel">QGraphicsItem.panel</a>() and <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsPanel</a>.</p>
<h3 class="fn"><a name="isSelected" />bool QGraphicsItem.isSelected (<i>self</i>)</h3><p>Returns true if this item is selected; otherwise, false is
returned.</p>
<p>Items that are in a group inherit the group's selected
state.</p>
<p>Items are not selected by default.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setSelected">setSelected</a>() and <a href="qgraphicsscene.html#setSelectionArea">QGraphicsScene.setSelectionArea</a>().</p>
<h3 class="fn"><a name="isUnderMouse" />bool QGraphicsItem.isUnderMouse (<i>self</i>)</h3><p>Returns true if this item is currently under the mouse cursor in
one of the views; otherwise, false is returned.</p>
<p>This function was introduced in Qt 4,4.</p>
<p><b>See also</b> <a href="qgraphicsscene.html#views">QGraphicsScene.views</a>() and
<a href="qcursor.html#pos">QCursor.pos</a>().</p>
<h3 class="fn"><a name="isVisible" />bool QGraphicsItem.isVisible (<i>self</i>)</h3><p>Returns true if the item is visible; otherwise, false is
returned.</p>
<p>Note that the item's general visibility is unrelated to whether
or not it is actually being visualized by a <a href="qgraphicsview.html">QGraphicsView</a>.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setVisible">setVisible</a>().</p>
<h3 class="fn"><a name="isVisibleTo" />bool QGraphicsItem.isVisibleTo (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>parent</i>)</h3><p>Returns true if the item is visible to <i>parent</i>; otherwise,
false is returned. <i>parent</i> can be 0, in which case this
function will return whether the item is visible to the scene or
not.</p>
<p>An item may not be visible to its ancestors even if <a href="qgraphicsitem.html#isVisible">isVisible</a>() is true. It may also
be visible to its ancestors even if <a href="qgraphicsitem.html#isVisible">isVisible</a>() is false. If any
ancestor is hidden, the item itself will be implicitly hidden, in
which case this function will return false.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isVisible">isVisible</a>() and <a href="qgraphicsitem.html#setVisible">setVisible</a>().</p>
<h3 class="fn"><a name="isWidget" />bool QGraphicsItem.isWidget (<i>self</i>)</h3><p>Returns true if this item is a widget (i.e., <a href="qgraphicswidget.html">QGraphicsWidget</a>); otherwise, returns
false.</p>
<p>This function was introduced in Qt 4.4.</p>
<h3 class="fn"><a name="isWindow" />bool QGraphicsItem.isWindow (<i>self</i>)</h3><p>Returns true if the item is a <a href="qgraphicswidget.html">QGraphicsWidget</a> window, otherwise
returns false.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicswidget.html#windowFlags-prop">QGraphicsWidget.windowFlags</a>().</p>
<h3 class="fn"><a name="itemChange" />QVariant QGraphicsItem.itemChange (<i>self</i>, <a href="qgraphicsitem.html#GraphicsItemChange-enum">GraphicsItemChange</a> <i>change</i>, QVariant <i>value</i>)</h3><p>This virtual function is called by <a href="qgraphicsitem.html">QGraphicsItem</a> to notify custom items that
some part of the item's state changes. By reimplementing this
function, your can react to a change, and in some cases, (depending
on <i>change</i>,) adjustments can be made.</p>
<p><i>change</i> is the parameter of the item that is changing.
<i>value</i> is the new value; the type of the value depends on
<i>change</i>.</p>
<p>Example:</p>
<pre class="cpp">
<span class="type"><a href="qvariant.html">QVariant</a></span> Component<span class="operator">.</span>itemChange(GraphicsItemChange change<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qvariant.html">QVariant</a></span> <span class="operator">&</span>value)
{
<span class="keyword">if</span> (change <span class="operator">=</span><span class="operator">=</span> ItemPositionChange <span class="operator">&</span><span class="operator">&</span> scene()) {
<span class="comment">// value is the new position.</span>
<span class="type"><a href="qpointf.html">QPointF</a></span> newPos <span class="operator">=</span> value<span class="operator">.</span>toPointF();
<span class="type"><a href="qrectf.html">QRectF</a></span> rect <span class="operator">=</span> scene()<span class="operator">-</span><span class="operator">></span>sceneRect();
<span class="keyword">if</span> (<span class="operator">!</span>rect<span class="operator">.</span>contains(newPos)) {
<span class="comment">// Keep the item inside the scene rect.</span>
newPos<span class="operator">.</span>setX(<a href="qtcore.html#qMin">qMin</a>(rect<span class="operator">.</span>right()<span class="operator">,</span> <a href="qtcore.html#qMax">qMax</a>(newPos<span class="operator">.</span>x()<span class="operator">,</span> rect<span class="operator">.</span>left())));
newPos<span class="operator">.</span>setY(<a href="qtcore.html#qMin">qMin</a>(rect<span class="operator">.</span>bottom()<span class="operator">,</span> <a href="qtcore.html#qMax">qMax</a>(newPos<span class="operator">.</span>y()<span class="operator">,</span> rect<span class="operator">.</span>top())));
<span class="keyword">return</span> newPos;
}
}
<span class="keyword">return</span> <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span><span class="operator">.</span>itemChange(change<span class="operator">,</span> value);
}
</pre>
<p>The default implementation does nothing, and returns
<i>value</i>.</p>
<p>Note: Certain <a href="qgraphicsitem.html">QGraphicsItem</a>
functions cannot be called in a reimplementation of this function;
see the <a href="qgraphicsitem.html#GraphicsItemChange-enum">GraphicsItemChange</a>
documentation for details.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#GraphicsItemChange-enum">GraphicsItemChange</a>.</p>
<h3 class="fn"><a name="itemTransform" />(<a href="qtransform.html">QTransform</a>, bool <i>ok</i>) QGraphicsItem.itemTransform (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>other</i>)</h3><p>Returns a <a href="qtransform.html">QTransform</a> that maps
coordinates from this item to <i>other</i>. If <i>ok</i> is not
null, and if there is no such transform, the boolean pointed to by
<i>ok</i> will be set to false; otherwise it will be set to
true.</p>
<p>This transform provides an alternative to the <a href="qgraphicsitem.html#mapToItem">mapToItem</a>() or <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>() functions, by
returning the appropriate transform so that you can map shapes and
coordinates yourself. It also helps you write more efficient code
when repeatedly mapping between the same two items.</p>
<p><b>Note:</b> In rare circumstances, there is no transform that
maps between two items.</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="qgraphicsitem.html#deviceTransform">deviceTransform</a>().</p>
<h3 class="fn"><a name="keyPressEvent" />QGraphicsItem.keyPressEvent (<i>self</i>, <a href="qkeyevent.html">QKeyEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive key press events for this item. The default
implementation ignores the event. If you reimplement this handler,
the event will by default be accepted.</p>
<p>Note that key events are only received for items that set the
<a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsFocusable</a>
flag, and that have keyboard input focus.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#keyReleaseEvent">keyReleaseEvent</a>(),
<a href="qgraphicsitem.html#setFocus">setFocus</a>(), <a href="qgraphicsscene.html#setFocusItem">QGraphicsScene.setFocusItem</a>(),
and <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="keyReleaseEvent" />QGraphicsItem.keyReleaseEvent (<i>self</i>, <a href="qkeyevent.html">QKeyEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive key release events for this item. The default
implementation ignores the event. If you reimplement this handler,
the event will by default be accepted.</p>
<p>Note that key events are only received for items that set the
<a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsFocusable</a>
flag, and that have keyboard input focus.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#keyPressEvent">keyPressEvent</a>(), <a href="qgraphicsitem.html#setFocus">setFocus</a>(), <a href="qgraphicsscene.html#setFocusItem">QGraphicsScene.setFocusItem</a>(),
and <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="mapFromItem" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapFromItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qpointf.html">QPointF</a> <i>point</i>)</h3><p>Maps the point <i>point</i>, which is in <i>item</i>'s
coordinate system, to this item's coordinate system, and returns
the mapped coordinate.</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromItem-2" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapFromItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in <i>item</i>'s
coordinate system, to this item's coordinate system, and returns
the mapped rectangle as a polygon.</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>()</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromItem-3" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapFromItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qpolygonf.html">QPolygonF</a> <i>polygon</i>)</h3><p>Maps the polygon <i>polygon</i>, which is in <i>item</i>'s
coordinate system, to this item's coordinate system, and returns
the mapped polygon.</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromItem-4" /><a href="qpainterpath.html">QPainterPath</a> QGraphicsItem.mapFromItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qpainterpath.html">QPainterPath</a> <i>path</i>)</h3><p>Maps the path <i>path</i>, which is in <i>item</i>'s coordinate
system, to this item's coordinate system, and returns the mapped
path.</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromItem-5" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapFromItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, float <i>ax</i>, float <i>ay</i>)</h3><p>This convenience function is equivalent to calling
mapFromItem(item, <a href="qrectf.html">QRectF</a>(<i>x</i>,
<i>y</i>, <i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.3.</p>
<h3 class="fn"><a name="mapFromItem-6" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapFromItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This is an overloaded function.</p>
<p>This convenience function is equivalent to calling
mapFromItem(<i>item</i>, <a href="qpointf.html">QPointF</a>(<i>x</i>, <i>y</i>)).</p>
<h3 class="fn"><a name="mapFromParent" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapFromParent (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>point</i>)</h3><p>Maps the point <i>point</i>, which is in this item's parent's
coordinate system, to this item's coordinate system, and returns
the mapped coordinate.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromParent-2" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapFromParent (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in this item's parent's
coordinate system, to this item's coordinate system, and returns
the mapped rectangle as a polygon.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromParent-3" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapFromParent (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a> <i>polygon</i>)</h3><p>Maps the polygon <i>polygon</i>, which is in this item's
parent's coordinate system, to this item's coordinate system, and
returns the mapped polygon.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromParent-4" /><a href="qpainterpath.html">QPainterPath</a> QGraphicsItem.mapFromParent (<i>self</i>, <a href="qpainterpath.html">QPainterPath</a> <i>path</i>)</h3><p>Maps the path <i>path</i>, which is in this item's parent's
coordinate system, to this item's coordinate system, and returns
the mapped path.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromParent-5" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapFromParent (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</h3><p>This convenience function is equivalent to calling
mapFromItem(<a href="qrectf.html">QRectF</a>(<i>x</i>, <i>y</i>,
<i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.3.</p>
<h3 class="fn"><a name="mapFromParent-6" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapFromParent (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This is an overloaded function.</p>
<p>This convenience function is equivalent to calling
mapFromParent(<a href="qpointf.html">QPointF</a>(<i>x</i>,
<i>y</i>)).</p>
<h3 class="fn"><a name="mapFromScene" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapFromScene (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>point</i>)</h3><p>Maps the point <i>point</i>, which is in this item's scene's
coordinate system, to this item's coordinate system, and returns
the mapped coordinate.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromScene-2" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapFromScene (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in this item's scene's
coordinate system, to this item's coordinate system, and returns
the mapped rectangle as a polygon.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromScene-3" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapFromScene (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a> <i>polygon</i>)</h3><p>Maps the polygon <i>polygon</i>, which is in this item's scene's
coordinate system, to this item's coordinate system, and returns
the mapped polygon.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromScene-4" /><a href="qpainterpath.html">QPainterPath</a> QGraphicsItem.mapFromScene (<i>self</i>, <a href="qpainterpath.html">QPainterPath</a> <i>path</i>)</h3><p>Maps the path <i>path</i>, which is in this item's scene's
coordinate system, to this item's coordinate system, and returns
the mapped path.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapFromScene-5" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapFromScene (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</h3><p>This convenience function is equivalent to calling
mapFromScene(<a href="qrectf.html">QRectF</a>(<i>x</i>, <i>y</i>,
<i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.3.</p>
<h3 class="fn"><a name="mapFromScene-6" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapFromScene (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This is an overloaded function.</p>
<p>This convenience function is equivalent to calling
mapFromScene(<a href="qpointf.html">QPointF</a>(<i>x</i>,
<i>y</i>)).</p>
<h3 class="fn"><a name="mapRectFromItem" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectFromItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in <i>item</i>'s
coordinate system, to this item's coordinate system, and returns
the mapped rectangle as a new rectangle (i.e., the bounding
rectangle of the resulting polygon).</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapRectFromScene">mapRectFromScene</a>().</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapRectFromItem-2" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectFromItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This convenience function is equivalent to calling
mapRectFromItem(item, <a href="qrectf.html">QRectF</a>(<i>x</i>,
<i>y</i>, <i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.5.</p>
<h3 class="fn"><a name="mapRectFromParent" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectFromParent (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in this item's parent's
coordinate system, to this item's coordinate system, and returns
the mapped rectangle as a new rectangle (i.e., the bounding
rectangle of the resulting polygon).</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapRectFromParent-2" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectFromParent (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This convenience function is equivalent to calling
mapRectFromParent(<a href="qrectf.html">QRectF</a>(<i>x</i>,
<i>y</i>, <i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.5.</p>
<h3 class="fn"><a name="mapRectFromScene" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectFromScene (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in scene coordinates,
to this item's coordinate system, and returns the mapped rectangle
as a new rectangle (i.e., the bounding rectangle of the resulting
polygon).</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapRectFromScene-2" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectFromScene (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This convenience function is equivalent to calling
mapRectFromScene(<a href="qrectf.html">QRectF</a>(<i>x</i>,
<i>y</i>, <i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.5.</p>
<h3 class="fn"><a name="mapRectToItem" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectToItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in this item's
coordinate system, to <i>item</i>'s coordinate system, and returns
the mapped rectangle as a new rectangle (i.e., the bounding
rectangle of the resulting polygon).</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapRectToScene">mapRectToScene</a>().</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapRectToItem-2" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectToItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This convenience function is equivalent to calling
mapRectToItem(item, <a href="qrectf.html">QRectF</a>(<i>x</i>,
<i>y</i>, <i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.5.</p>
<h3 class="fn"><a name="mapRectToParent" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectToParent (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in this item's
coordinate system, to its parent's coordinate system, and returns
the mapped rectangle as a new rectangle (i.e., the bounding
rectangle of the resulting polygon).</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapRectToParent-2" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectToParent (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This convenience function is equivalent to calling
mapRectToParent(<a href="qrectf.html">QRectF</a>(<i>x</i>,
<i>y</i>, <i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.5.</p>
<h3 class="fn"><a name="mapRectToScene" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectToScene (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in this item's
coordinate system, to the scene coordinate system, and returns the
mapped rectangle as a new rectangle (i.e., the bounding rectangle
of the resulting polygon).</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapRectToScene-2" /><a href="qrectf.html">QRectF</a> QGraphicsItem.mapRectToScene (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This convenience function is equivalent to calling
mapRectToScene(<a href="qrectf.html">QRectF</a>(<i>x</i>, <i>y</i>,
<i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.5.</p>
<h3 class="fn"><a name="mapToItem" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapToItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qpointf.html">QPointF</a> <i>point</i>)</h3><p>Maps the point <i>point</i>, which is in this item's coordinate
system, to <i>item</i>'s coordinate system, and returns the mapped
coordinate.</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapToScene">mapToScene</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToItem-2" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapToItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in this item's
coordinate system, to <i>item</i>'s coordinate system, and returns
the mapped rectangle as a polygon.</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapToScene">mapToScene</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToItem-3" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapToItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qpolygonf.html">QPolygonF</a> <i>polygon</i>)</h3><p>Maps the polygon <i>polygon</i>, which is in this item's
coordinate system, to <i>item</i>'s coordinate system, and returns
the mapped polygon.</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapToScene">mapToScene</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToItem-4" /><a href="qpainterpath.html">QPainterPath</a> QGraphicsItem.mapToItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, <a href="qpainterpath.html">QPainterPath</a> <i>path</i>)</h3><p>Maps the path <i>path</i>, which is in this item's coordinate
system, to <i>item</i>'s coordinate system, and returns the mapped
path.</p>
<p>If <i>item</i> is 0, this function returns the same as <a href="qgraphicsitem.html#mapToScene">mapToScene</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#itemTransform">itemTransform</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapFromItem">mapFromItem</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToItem-5" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapToItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, float <i>ax</i>, float <i>ay</i>)</h3><p>This convenience function is equivalent to calling
mapToItem(item, <a href="qrectf.html">QRectF</a>(<i>x</i>,
<i>y</i>, <i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.3.</p>
<h3 class="fn"><a name="mapToItem-6" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapToItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This is an overloaded function.</p>
<p>This convenience function is equivalent to calling
mapToItem(<i>item</i>, <a href="qpointf.html">QPointF</a>(<i>x</i>,
<i>y</i>)).</p>
<h3 class="fn"><a name="mapToParent" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapToParent (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>point</i>)</h3><p>Maps the point <i>point</i>, which is in this item's coordinate
system, to its parent's coordinate system, and returns the mapped
coordinate. If the item has no parent, <i>point</i> will be mapped
to the scene's coordinate system.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), and
<a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToParent-2" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapToParent (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in this item's
coordinate system, to its parent's coordinate system, and returns
the mapped rectangle as a polygon. If the item has no parent,
<i>rect</i> will be mapped to the scene's coordinate system.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), and
<a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToParent-3" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapToParent (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a> <i>polygon</i>)</h3><p>Maps the polygon <i>polygon</i>, which is in this item's
coordinate system, to its parent's coordinate system, and returns
the mapped polygon. If the item has no parent, <i>polygon</i> will
be mapped to the scene's coordinate system.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), and
<a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToParent-4" /><a href="qpainterpath.html">QPainterPath</a> QGraphicsItem.mapToParent (<i>self</i>, <a href="qpainterpath.html">QPainterPath</a> <i>path</i>)</h3><p>Maps the path <i>path</i>, which is in this item's coordinate
system, to its parent's coordinate system, and returns the mapped
path. If the item has no parent, <i>path</i> will be mapped to the
scene's coordinate system.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToScene">mapToScene</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapFromParent">mapFromParent</a>(), and
<a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToParent-5" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapToParent (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</h3><p>This convenience function is equivalent to calling
mapToParent(<a href="qrectf.html">QRectF</a>(<i>x</i>, <i>y</i>,
<i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.3.</p>
<h3 class="fn"><a name="mapToParent-6" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapToParent (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This is an overloaded function.</p>
<p>This convenience function is equivalent to calling
mapToParent(<a href="qpointf.html">QPointF</a>(<i>x</i>,
<i>y</i>)).</p>
<h3 class="fn"><a name="mapToScene" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapToScene (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>point</i>)</h3><p>Maps the point <i>point</i>, which is in this item's coordinate
system, to the scene's coordinate system, and returns the mapped
coordinate.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToScene-2" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapToScene (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i>)</h3><p>Maps the rectangle <i>rect</i>, which is in this item's
coordinate system, to the scene's coordinate system, and returns
the mapped rectangle as a polygon.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToScene-3" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapToScene (<i>self</i>, <a href="qpolygonf.html">QPolygonF</a> <i>polygon</i>)</h3><p>Maps the polygon <i>polygon</i>, which is in this item's
coordinate system, to the scene's coordinate system, and returns
the mapped polygon.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToScene-4" /><a href="qpainterpath.html">QPainterPath</a> QGraphicsItem.mapToScene (<i>self</i>, <a href="qpainterpath.html">QPainterPath</a> <i>path</i>)</h3><p>Maps the path <i>path</i>, which is in this item's coordinate
system, to the scene's coordinate system, and returns the mapped
path.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mapToParent">mapToParent</a>(), <a href="qgraphicsitem.html#mapToItem">mapToItem</a>(), <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="mapToScene-5" /><a href="qpointf.html">QPointF</a> QGraphicsItem.mapToScene (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</h3><p>This convenience function is equivalent to calling
mapToScene(<a href="qrectf.html">QRectF</a>(<i>x</i>, <i>y</i>,
<i>w</i>, <i>h</i>)).</p>
<p>This function was introduced in Qt 4.3.</p>
<h3 class="fn"><a name="mapToScene-6" /><a href="qpolygonf.html">QPolygonF</a> QGraphicsItem.mapToScene (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>w</i>, float <i>h</i>)</h3><p>This is an overloaded function.</p>
<p>This convenience function is equivalent to calling
mapToScene(<a href="qpointf.html">QPointF</a>(<i>x</i>,
<i>y</i>)).</p>
<h3 class="fn"><a name="matrix" /><a href="qmatrix.html">QMatrix</a> QGraphicsItem.matrix (<i>self</i>)</h3><h3 class="fn"><a name="mouseDoubleClickEvent" />QGraphicsItem.mouseDoubleClickEvent (<i>self</i>, <a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive mouse doubleclick events for this item.</p>
<p>When doubleclicking an item, the item will first receive a mouse
press event, followed by a release event (i.e., a click), then a
doubleclick event, and finally a release event.</p>
<p>Calling <a href="qevent.html#ignore">QEvent.ignore</a>() or
<a href="qevent.html#accept">QEvent.accept</a>() on <i>event</i>
has no effect.</p>
<p>The default implementation calls <a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>(). If you
want to keep the base implementation when reimplementing this
function, call QGraphicsItem.mouseDoubleClickEvent() in your
reimplementation.</p>
<p>Note that an item will not receive double click events if it is
neither <a href="qgraphicsitem.html#GraphicsItemFlag-enum">selectable</a> nor
<a href="qgraphicsitem.html#GraphicsItemFlag-enum">movable</a>
(single mouse clicks are ignored in this case, and that stops the
generation of double clicks).</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>(),
<a href="qgraphicsitem.html#mouseMoveEvent">mouseMoveEvent</a>(),
<a href="qgraphicsitem.html#mouseReleaseEvent">mouseReleaseEvent</a>(), and
<a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="mouseMoveEvent" />QGraphicsItem.mouseMoveEvent (<i>self</i>, <a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive mouse move events for this item. If you do receive this
event, you can be certain that this item also received a mouse
press event, and that this item is the current mouse grabber.</p>
<p>Calling <a href="qevent.html#ignore">QEvent.ignore</a>() or
<a href="qevent.html#accept">QEvent.accept</a>() on <i>event</i>
has no effect.</p>
<p>The default implementation handles basic item interaction, such
as selection and moving. If you want to keep the base
implementation when reimplementing this function, call
QGraphicsItem.mouseMoveEvent() in your reimplementation.</p>
<p>Please note that <a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>() decides
which graphics item it is that receives mouse events. See the
<a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>()
description for details.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>(),
<a href="qgraphicsitem.html#mouseReleaseEvent">mouseReleaseEvent</a>(),
<a href="qgraphicsitem.html#mouseDoubleClickEvent">mouseDoubleClickEvent</a>(),
and <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="mousePressEvent" />QGraphicsItem.mousePressEvent (<i>self</i>, <a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive mouse press events for this item. Mouse press events are
only delivered to items that accept the mouse button that is
pressed. By default, an item accepts all mouse buttons, but you can
change this by calling <a href="qgraphicsitem.html#setAcceptedMouseButtons">setAcceptedMouseButtons</a>().</p>
<p>The mouse press event decides which item should become the mouse
grabber (see <a href="qgraphicsscene.html#mouseGrabberItem">QGraphicsScene.mouseGrabberItem</a>()).
If you do not reimplement this function, the press event will
propagate to any topmost item beneath this item, and no other mouse
events will be delivered to this item.</p>
<p>If you do reimplement this function, <i>event</i> will by
default be accepted (see <a href="qevent.html#accept">QEvent.accept</a>()), and this item is then
the mouse grabber. This allows the item to receive future move,
release and doubleclick events. If you call <a href="qevent.html#ignore">QEvent.ignore</a>() on <i>event</i>, this
item will lose the mouse grab, and <i>event</i> will propagate to
any topmost item beneath. No further mouse events will be delivered
to this item unless a new mouse press event is received.</p>
<p>The default implementation handles basic item interaction, such
as selection and moving. If you want to keep the base
implementation when reimplementing this function, call
QGraphicsItem.mousePressEvent() in your reimplementation.</p>
<p>The event is <a href="qevent.html#ignore">QEvent.ignore</a>()d
for items that are neither <a href="qgraphicsitem.html#GraphicsItemFlag-enum">movable</a> nor <a href="qgraphicsitem.html#GraphicsItemFlag-enum">selectable</a>.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mouseMoveEvent">mouseMoveEvent</a>(), <a href="qgraphicsitem.html#mouseReleaseEvent">mouseReleaseEvent</a>(),
<a href="qgraphicsitem.html#mouseDoubleClickEvent">mouseDoubleClickEvent</a>(),
and <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="mouseReleaseEvent" />QGraphicsItem.mouseReleaseEvent (<i>self</i>, <a href="qgraphicsscenemouseevent.html">QGraphicsSceneMouseEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive mouse release events for this item.</p>
<p>Calling <a href="qevent.html#ignore">QEvent.ignore</a>() or
<a href="qevent.html#accept">QEvent.accept</a>() on <i>event</i>
has no effect.</p>
<p>The default implementation handles basic item interaction, such
as selection and moving. If you want to keep the base
implementation when reimplementing this function, call
QGraphicsItem.mouseReleaseEvent() in your reimplementation.</p>
<p>Please note that <a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>() decides
which graphics item it is that receives mouse events. See the
<a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>()
description for details.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>(),
<a href="qgraphicsitem.html#mouseMoveEvent">mouseMoveEvent</a>(),
<a href="qgraphicsitem.html#mouseDoubleClickEvent">mouseDoubleClickEvent</a>(),
and <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="moveBy" />QGraphicsItem.moveBy (<i>self</i>, float <i>dx</i>, float <i>dy</i>)</h3><p>Moves the item by <i>dx</i> points horizontally, and <i>dy</i>
point vertically. This function is equivalent to calling
setPos(<a href="qgraphicsitem.html#pos">pos</a>() + <a href="qpointf.html">QPointF</a>(<i>dx</i>, <i>dy</i>)).</p>
<h3 class="fn"><a name="opacity" />float QGraphicsItem.opacity (<i>self</i>)</h3><p>Returns this item's local opacity, which is between 0.0
(transparent) and 1.0 (opaque). This value is combined with parent
and ancestor values into the <a href="qgraphicsitem.html#effectiveOpacity">effectiveOpacity</a>(). The
effective opacity decides how the item is rendered.</p>
<p>The opacity property decides the state of the painter passed to
the <a href="qgraphicsitem.html#paint">paint</a>() function. If the
item is cached, i.e., <a href="qgraphicsitem.html#CacheMode-enum">ItemCoordinateCache</a> or
<a href="qgraphicsitem.html#CacheMode-enum">DeviceCoordinateCache</a>, the
effective property will be applied to the item's cache as it is
rendered.</p>
<p>The default opacity is 1.0; fully opaque.</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setOpacity">setOpacity</a>(), <a href="qgraphicsitem.html#paint">paint</a>(), <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIgnoresParentOpacity</a>,
and <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemDoesntPropagateOpacityToChildren</a>.</p>
<h3 class="fn"><a name="opaqueArea" /><a href="qpainterpath.html">QPainterPath</a> QGraphicsItem.opaqueArea (<i>self</i>)</h3><p>This virtual function returns a shape representing the area
where this item is opaque. An area is opaque if it is filled using
an opaque brush or color (i.e., not transparent).</p>
<p>This function is used by <a href="qgraphicsitem.html#isObscuredBy">isObscuredBy</a>(), which is
called by underlying items to determine if they are obscured by
this item.</p>
<p>The default implementation returns an empty <a href="qpainterpath.html">QPainterPath</a>, indicating that this item is
completely transparent and does not obscure any other items.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isObscuredBy">isObscuredBy</a>(), <a href="qgraphicsitem.html#isObscured">isObscured</a>(), and <a href="qgraphicsitem.html#shape">shape</a>().</p>
<h3 class="fn"><a name="paint" />QGraphicsItem.paint (<i>self</i>, <a href="qpainter.html">QPainter</a> <i>painter</i>, <a href="qstyleoptiongraphicsitem.html">QStyleOptionGraphicsItem</a> <i>option</i>, <a href="qwidget.html">QWidget</a> <i>widget</i> = None)</h3><p>This method is abstract and should be reimplemented in any sub-class.</p><p>This function, which is usually called by <a href="qgraphicsview.html">QGraphicsView</a>, paints the contents of an
item in local coordinates.</p>
<p>Reimplement this function in a <a href="qgraphicsitem.html">QGraphicsItem</a> subclass to provide the
item's painting implementation, using <i>painter</i>. The
<i>option</i> parameter provides style options for the item, such
as its state, exposed area and its level-of-detail hints. The
<i>widget</i> argument is optional. If provided, it points to the
widget that is being painted on; otherwise, it is 0. For cached
painting, <i>widget</i> is always 0.</p>
<pre class="cpp">
<span class="type">void</span> RoundRectItem<span class="operator">.</span>paint(<span class="type"><a href="qpainter.html">QPainter</a></span> <span class="operator">*</span>painter<span class="operator">,</span>
<span class="keyword">const</span> <span class="type"><a href="qstyleoptiongraphicsitem.html">QStyleOptionGraphicsItem</a></span> <span class="operator">*</span>option<span class="operator">,</span>
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget)
{
painter<span class="operator">-</span><span class="operator">></span>drawRoundedRect(<span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="number">20</span><span class="operator">,</span> <span class="number">20</span><span class="operator">,</span> <span class="number">5</span><span class="operator">,</span> <span class="number">5</span>);
}
</pre>
<p>The painter's pen is 0-width by default, and its pen is
initialized to the <a href="qpalette.html#ColorRole-enum">QPalette.Text</a> brush from the
paint device's palette. The brush is initialized to <a href="qpalette.html#ColorRole-enum">QPalette.Window</a>.</p>
<p>Make sure to constrain all painting inside the boundaries of
<a href="qgraphicsitem.html#boundingRect">boundingRect</a>() to
avoid rendering artifacts (as <a href="qgraphicsview.html">QGraphicsView</a> does not clip the painter
for you). In particular, when <a href="qpainter.html">QPainter</a>
renders the outline of a shape using an assigned <a href="qpen.html">QPen</a>, half of the outline will be drawn outside,
and half inside, the shape you're rendering (e.g., with a pen width
of 2 units, you must draw outlines 1 unit inside <a href="qgraphicsitem.html#boundingRect">boundingRect</a>()). <a href="qgraphicsitem.html">QGraphicsItem</a> does not support use of
cosmetic pens with a non-zero width.</p>
<p>All painting is done in local coordinates.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setCacheMode">setCacheMode</a>(), <a href="qpen.html#width">QPen.width</a>(), <a href="graphicsview.html#item-coordinates">Item Coordinates</a>, and
<a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemUsesExtendedStyleOption</a>.</p>
<h3 class="fn"><a name="panel" /><a href="qgraphicsitem.html">QGraphicsItem</a> QGraphicsItem.panel (<i>self</i>)</h3><p>Returns the item's panel, or 0 if this item does not have a
panel. If the item is a panel, it will return itself. Otherwise it
will return the closest ancestor that is a panel.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isPanel">isPanel</a>() and <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsPanel</a>.</p>
<h3 class="fn"><a name="panelModality" /><a href="qgraphicsitem.html#PanelModality-enum">PanelModality</a> QGraphicsItem.panelModality (<i>self</i>)</h3><p>Returns the modality for this item.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setPanelModality">setPanelModality</a>().</p>
<h3 class="fn"><a name="parentItem" /><a href="qgraphicsitem.html">QGraphicsItem</a> QGraphicsItem.parentItem (<i>self</i>)</h3><p>Returns a pointer to this item's parent item. If this item does
not have a parent, 0 is returned.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setParentItem">setParentItem</a>() and <a href="qgraphicsitem.html#childItems">childItems</a>().</p>
<h3 class="fn"><a name="parentObject" /><a href="qgraphicsobject.html">QGraphicsObject</a> QGraphicsItem.parentObject (<i>self</i>)</h3><p>Returns a pointer to the item's parent, cast to a <a href="qgraphicsobject.html">QGraphicsObject</a>. returns 0 if the parent
item is not a <a href="qgraphicsobject.html">QGraphicsObject</a>.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#parentItem">parentItem</a>() and <a href="qgraphicsitem.html#childItems">childItems</a>().</p>
<h3 class="fn"><a name="parentWidget" /><a href="qgraphicswidget.html">QGraphicsWidget</a> QGraphicsItem.parentWidget (<i>self</i>)</h3><p>Returns a pointer to the item's parent widget. The item's parent
widget is the closest parent item that is a widget.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#parentItem">parentItem</a>() and <a href="qgraphicsitem.html#childItems">childItems</a>().</p>
<h3 class="fn"><a name="pos" /><a href="qpointf.html">QPointF</a> QGraphicsItem.pos (<i>self</i>)</h3><p>Returns the position of the item in parent coordinates. If the
item has no parent, its position is given in scene coordinates.</p>
<p>The position of the item describes its origin (local coordinate
(0, 0)) in parent coordinates; this function returns the same as
mapToParent(0, 0).</p>
<p>For convenience, you can also call <a href="qgraphicsitem.html#scenePos">scenePos</a>() to determine the
item's position in scene coordinates, regardless of its parent.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#x">x</a>(), <a href="qgraphicsitem.html#y">y</a>(), <a href="qgraphicsitem.html#setPos">setPos</a>(), <a href="qgraphicsitem.html#transform">transform</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="prepareGeometryChange" />QGraphicsItem.prepareGeometryChange (<i>self</i>)</h3><p>Prepares the item for a geometry change. Call this function
before changing the bounding rect of an item to keep <a href="qgraphicsscene.html">QGraphicsScene</a>'s index up to date.</p>
<p>prepareGeometryChange() will call <a href="qgraphicsitem.html#update">update</a>() if this is necessary.</p>
<p>Example:</p>
<pre class="cpp">
<span class="type">void</span> CircleItem<span class="operator">.</span>setRadius(<span class="type"><a href="qtcore.html#qreal-typedef">qreal</a></span> newRadius)
{
<span class="keyword">if</span> (radius <span class="operator">!</span><span class="operator">=</span> newRadius) {
prepareGeometryChange();
radius <span class="operator">=</span> newRadius;
}
}
</pre>
<p><b>See also</b> <a href="qgraphicsitem.html#boundingRect">boundingRect</a>().</p>
<h3 class="fn"><a name="removeSceneEventFilter" />QGraphicsItem.removeSceneEventFilter (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>filterItem</i>)</h3><p>Removes an event filter on this item from <i>filterItem</i>.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#installSceneEventFilter">installSceneEventFilter</a>().</p>
<h3 class="fn"><a name="resetMatrix" />QGraphicsItem.resetMatrix (<i>self</i>)</h3><h3 class="fn"><a name="resetTransform" />QGraphicsItem.resetTransform (<i>self</i>)</h3><p>Resets this item's transformation matrix to the identity matrix
or all the transformation properties to their default values. This
is equivalent to calling <tt>setTransform(QTransform())</tt>.</p>
<p>This function was introduced in Qt 4.3.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setTransform">setTransform</a>() and <a href="qgraphicsitem.html#transform">transform</a>().</p>
<h3 class="fn"><a name="rotate" />QGraphicsItem.rotate (<i>self</i>, float <i>angle</i>)</h3><h3 class="fn"><a name="rotation" />float QGraphicsItem.rotation (<i>self</i>)</h3><p>Returns the clockwise rotation, in degrees, around the Z axis.
The default value is 0 (i.e., the item is not rotated).</p>
<p>The rotation is combined with the item's <a href="qgraphicsitem.html#scale">scale</a>(), <a href="qgraphicsitem.html#transform">transform</a>() and <a href="qgraphicsitem.html#transformations">transformations</a>() to map
the item's coordinate system to the parent item.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setRotation">setRotation</a>(), <a href="qgraphicsitem.html#transformOriginPoint">transformOriginPoint</a>(),
and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="scale" />QGraphicsItem.scale (<i>self</i>, float <i>sx</i>, float <i>sy</i>)</h3><p>Returns the scale factor of the item. The default scale factor
is 1.0 (i.e., the item is not scaled).</p>
<p>The scale is combined with the item's <a href="qgraphicsitem.html#rotation">rotation</a>(), <a href="qgraphicsitem.html#transform">transform</a>() and <a href="qgraphicsitem.html#transformations">transformations</a>() to map
the item's coordinate system to the parent item.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setScale">setScale</a>(), <a href="qgraphicsitem.html#rotation">rotation</a>(), and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="scale-2" />float QGraphicsItem.scale (<i>self</i>)</h3><h3 class="fn"><a name="scene" /><a href="qgraphicsscene.html">QGraphicsScene</a> QGraphicsItem.scene (<i>self</i>)</h3><p>Returns the current scene for the item, or 0 if the item is not
stored in a scene.</p>
<p>To add or move an item to a scene, call <a href="qgraphicsscene.html#addItem">QGraphicsScene.addItem</a>().</p>
<h3 class="fn"><a name="sceneBoundingRect" /><a href="qrectf.html">QRectF</a> QGraphicsItem.sceneBoundingRect (<i>self</i>)</h3><p>Returns the bounding rect of this item in scene coordinates, by
combining <a href="qgraphicsitem.html#sceneTransform">sceneTransform</a>() with
<a href="qgraphicsitem.html#boundingRect">boundingRect</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#boundingRect">boundingRect</a>() and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="sceneEvent" />bool QGraphicsItem.sceneEvent (<i>self</i>, <a href="qevent.html">QEvent</a> <i>event</i>)</h3><p>This virtual function receives events to this item. Reimplement
this function to intercept events before they are dispatched to the
specialized event handlers <a href="qgraphicsitem.html#contextMenuEvent">contextMenuEvent</a>(),
<a href="qgraphicsitem.html#focusInEvent">focusInEvent</a>(),
<a href="qgraphicsitem.html#focusOutEvent">focusOutEvent</a>(),
<a href="qgraphicsitem.html#hoverEnterEvent">hoverEnterEvent</a>(),
<a href="qgraphicsitem.html#hoverMoveEvent">hoverMoveEvent</a>(),
<a href="qgraphicsitem.html#hoverLeaveEvent">hoverLeaveEvent</a>(),
<a href="qgraphicsitem.html#keyPressEvent">keyPressEvent</a>(),
<a href="qgraphicsitem.html#keyReleaseEvent">keyReleaseEvent</a>(),
<a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>(),
<a href="qgraphicsitem.html#mouseReleaseEvent">mouseReleaseEvent</a>(),
<a href="qgraphicsitem.html#mouseMoveEvent">mouseMoveEvent</a>(),
and <a href="qgraphicsitem.html#mouseDoubleClickEvent">mouseDoubleClickEvent</a>().</p>
<p>Returns true if the event was recognized and handled; otherwise,
(e.g., if the event type was not recognized,) false is
returned.</p>
<p><i>event</i> is the intercepted event.</p>
<h3 class="fn"><a name="sceneEventFilter" />bool QGraphicsItem.sceneEventFilter (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>watched</i>, <a href="qevent.html">QEvent</a> <i>event</i>)</h3><p>Filters events for the item <i>watched</i>. <i>event</i> is the
filtered event.</p>
<p>Reimplementing this function in a subclass makes it possible for
the item to be used as an event filter for other items,
intercepting all the events send to those items before they are
able to respond.</p>
<p>Reimplementations must return true to prevent further processing
of a given event, ensuring that it will not be delivered to the
watched item, or return false to indicate that the event should be
propagated further by the event system.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#installSceneEventFilter">installSceneEventFilter</a>().</p>
<h3 class="fn"><a name="sceneMatrix" /><a href="qmatrix.html">QMatrix</a> QGraphicsItem.sceneMatrix (<i>self</i>)</h3><h3 class="fn"><a name="scenePos" /><a href="qpointf.html">QPointF</a> QGraphicsItem.scenePos (<i>self</i>)</h3><p>Returns the item's position in scene coordinates. This is
equivalent to calling <tt>mapToScene(0, 0)</tt>.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#pos">pos</a>(),
<a href="qgraphicsitem.html#sceneTransform">sceneTransform</a>(),
and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="sceneTransform" /><a href="qtransform.html">QTransform</a> QGraphicsItem.sceneTransform (<i>self</i>)</h3><p>Returns this item's scene transformation matrix. This matrix can
be used to map coordinates and geometrical shapes from this item's
local coordinate system to the scene's coordinate system. To map
coordinates from the scene, you must first invert the returned
matrix.</p>
<p>Example:</p>
<pre class="cpp">
<span class="type"><a href="qgraphicsrectitem.html">QGraphicsRectItem</a></span> rect;
rect<span class="operator">.</span><a href="qgraphicsitem.html#setPos">setPos</a>(<span class="number">100</span><span class="operator">,</span> <span class="number">100</span>);
rect<span class="operator">.</span>sceneTransform()<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>));
<span class="comment">// returns QPointF(100, 100);</span>
rect<span class="operator">.</span>sceneTransform()<span class="operator">.</span>inverted()<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(<span class="number">100</span><span class="operator">,</span> <span class="number">100</span>));
<span class="comment">// returns QPointF(0, 0);</span>
</pre>
<p>Unlike <a href="qgraphicsitem.html#transform">transform</a>(),
which returns only an item's local transformation, this function
includes the item's (and any parents') position, and all the
transfomation properties.</p>
<p>This function was introduced in Qt 4.3.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#transform">transform</a>(), <a href="qgraphicsitem.html#setTransform">setTransform</a>(), <a href="qgraphicsitem.html#scenePos">scenePos</a>(), <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>, and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="scroll" />QGraphicsItem.scroll (<i>self</i>, float <i>dx</i>, float <i>dy</i>, <a href="qrectf.html">QRectF</a> <i>rect</i> = QRectF())</h3><p>Scrolls the contents of <i>rect</i> by <i>dx</i>, <i>dy</i>. If
<i>rect</i> is a null rect (the default), the item's bounding rect
is scrolled.</p>
<p>Scrolling provides a fast alternative to simply redrawing when
the contents of the item (or parts of the item) are shifted
vertically or horizontally. Depending on the current transformation
and the capabilities of the paint device (i.e., the viewport), this
operation may consist of simply moving pixels from one location to
another using memmove(). In most cases this is faster than
rerendering the entire area.</p>
<p>After scrolling, the item will issue an update for the newly
exposed areas. If scrolling is not supported (e.g., you are
rendering to an OpenGL viewport, which does not benefit from scroll
optimizations), this function is equivalent to calling
update(<i>rect</i>).</p>
<p><b>Note:</b> Scrolling is only supported when <a href="qgraphicsitem.html#CacheMode-enum">QGraphicsItem.ItemCoordinateCache</a>
is enabled; in all other cases calling this function is equivalent
to calling update(<i>rect</i>). If you for sure know that the item
is opaque and not overlapped by other items, you can map the
<i>rect</i> to viewport coordinates and scroll the viewport.</p>
<pre class="cpp">
<span class="type"><a href="qtransform.html">QTransform</a></span> xform <span class="operator">=</span> item<span class="operator">-</span><span class="operator">></span><a href="qgraphicsitem.html#deviceTransform">deviceTransform</a>(view<span class="operator">-</span><span class="operator">></span>viewportTransform());
<span class="type"><a href="qrect.html">QRect</a></span> deviceRect <span class="operator">=</span> xform<span class="operator">.</span>mapRect(rect)<span class="operator">.</span>toAlignedRect();
view<span class="operator">-</span><span class="operator">></span>viewport()<span class="operator">-</span><span class="operator">></span>scroll(dx<span class="operator">,</span> dy<span class="operator">,</span> deviceRect);
</pre>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#boundingRect">boundingRect</a>().</p>
<h3 class="fn"><a name="setAcceptDrops" />QGraphicsItem.setAcceptDrops (<i>self</i>, bool <i>on</i>)</h3><p>If <i>on</i> is true, this item will accept drag and drop
events; otherwise, it is transparent for drag and drop events. By
default, items do not accept drag and drop events.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#acceptDrops">acceptDrops</a>().</p>
<h3 class="fn"><a name="setAcceptedMouseButtons" />QGraphicsItem.setAcceptedMouseButtons (<i>self</i>, <a href="qt-mousebuttons.html">Qt.MouseButtons</a> <i>buttons</i>)</h3><p>Sets the mouse <i>buttons</i> that this item accepts mouse
events for.</p>
<p>By default, all mouse buttons are accepted. If an item accepts a
mouse button, it will become the mouse grabber item when a mouse
press event is delivered for that button. However, if the item does
not accept the mouse button, <a href="qgraphicsscene.html">QGraphicsScene</a> will forward the mouse
events to the first item beneath it that does.</p>
<p>To disable mouse events for an item (i.e., make it transparent
for mouse events), call setAcceptedMouseButtons(0).</p>
<p><b>See also</b> <a href="qgraphicsitem.html#acceptedMouseButtons">acceptedMouseButtons</a>()
and <a href="qgraphicsitem.html#mousePressEvent">mousePressEvent</a>().</p>
<h3 class="fn"><a name="setAcceptHoverEvents" />QGraphicsItem.setAcceptHoverEvents (<i>self</i>, bool <i>enabled</i>)</h3><p>If <i>enabled</i> is true, this item will accept hover events;
otherwise, it will ignore them. By default, items do not accept
hover events.</p>
<p>Hover events are delivered when there is no current mouse
grabber item. They are sent when the mouse cursor enters an item,
when it moves around inside the item, and when the cursor leaves an
item. Hover events are commonly used to highlight an item when it's
entered, and for tracking the mouse cursor as it hovers over the
item (equivalent to <a href="qwidget.html#mouseTracking-prop">QWidget.mouseTracking</a>).</p>
<p>Parent items receive hover enter events before their children,
and leave events after their children. The parent does not receive
a hover leave event if the cursor enters a child, though; the
parent stays "hovered" until the cursor leaves its area, including
its children's areas.</p>
<p>If a parent item handles child events, it will receive hover
move, drag move, and drop events as the cursor passes through its
children, but it does not receive hover enter and hover leave, nor
drag enter and drag leave events on behalf of its children.</p>
<p>A <a href="qgraphicswidget.html">QGraphicsWidget</a> with window
decorations will accept hover events regardless of the value of
<a href="qgraphicsitem.html#acceptHoverEvents">acceptHoverEvents</a>().</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#acceptHoverEvents">acceptHoverEvents</a>(),
<a href="qgraphicsitem.html#hoverEnterEvent">hoverEnterEvent</a>(),
<a href="qgraphicsitem.html#hoverMoveEvent">hoverMoveEvent</a>(),
and <a href="qgraphicsitem.html#hoverLeaveEvent">hoverLeaveEvent</a>().</p>
<h3 class="fn"><a name="setAcceptsHoverEvents" />QGraphicsItem.setAcceptsHoverEvents (<i>self</i>, bool <i>enabled</i>)</h3><h3 class="fn"><a name="setAcceptTouchEvents" />QGraphicsItem.setAcceptTouchEvents (<i>self</i>, bool <i>enabled</i>)</h3><p>If <i>enabled</i> is true, this item will accept <a href="qtouchevent.html">touch events</a>; otherwise, it will ignore
them. By default, items do not accept touch events.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#acceptTouchEvents">acceptTouchEvents</a>().</p>
<h3 class="fn"><a name="setActive" />QGraphicsItem.setActive (<i>self</i>, bool <i>active</i>)</h3><p>If <i>active</i> is true, and the scene is active, this item's
panel will be activated. Otherwise, the panel is deactivated.</p>
<p>If the item is not part of an active scene, <i>active</i> will
decide what happens to the panel when the scene becomes active or
the item is added to the scene. If true, the item's panel will be
activated when the item is either added to the scene or the scene
is activated. Otherwise, the item will stay inactive independent of
the scene's activated state.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isPanel">isPanel</a>(), <a href="qgraphicsscene.html#setActivePanel">QGraphicsScene.setActivePanel</a>(),
and <a href="qgraphicsscene.html#isActive">QGraphicsScene.isActive</a>().</p>
<h3 class="fn"><a name="setBoundingRegionGranularity" />QGraphicsItem.setBoundingRegionGranularity (<i>self</i>, float <i>granularity</i>)</h3><p>Sets the bounding region granularity to <i>granularity</i>; a
value between and including 0 and 1. The default value is 0 (i.e.,
the lowest granularity, where the bounding region corresponds to
the item's bounding rectangle).</p>
<p>The granularity is used by <a href="qgraphicsitem.html#boundingRegion">boundingRegion</a>() to
calculate how fine the bounding region of the item should be. The
highest achievable granularity is 1, where <a href="qgraphicsitem.html#boundingRegion">boundingRegion</a>() will
return the finest outline possible for the respective device (e.g.,
for a <a href="qgraphicsview.html">QGraphicsView</a> viewport, this
gives you a pixel-perfect bounding region). The lowest possible
granularity is 0. The value of <i>granularity</i> describes the
ratio between device resolution and the resolution of the bounding
region (e.g., a value of 0.25 will provide a region where each
chunk corresponds to 4x4 device units / pixels).</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#boundingRegionGranularity">boundingRegionGranularity</a>().</p>
<h3 class="fn"><a name="setCacheMode" />QGraphicsItem.setCacheMode (<i>self</i>, <a href="qgraphicsitem.html#CacheMode-enum">CacheMode</a> <i>mode</i>, <a href="qsize.html">QSize</a> <i>logicalCacheSize</i> = QSize())</h3><p>Sets the item's cache mode to <i>mode</i>.</p>
<p>The optional <i>logicalCacheSize</i> argument is used only by
<a href="qgraphicsitem.html#CacheMode-enum">ItemCoordinateCache</a>
mode, and describes the resolution of the cache buffer; if
<i>logicalCacheSize</i> is (100, 100), <a href="qgraphicsitem.html">QGraphicsItem</a> will fit the item into
100x100 pixels in graphics memory, regardless of the logical size
of the item itself. By default <a href="qgraphicsitem.html">QGraphicsItem</a> uses the size of <a href="qgraphicsitem.html#boundingRect">boundingRect</a>(). For all other
cache modes than <a href="qgraphicsitem.html#CacheMode-enum">ItemCoordinateCache</a>,
<i>logicalCacheSize</i> is ignored.</p>
<p>Caching can speed up rendering if your item spends a significant
time redrawing itself. In some cases the cache can also slow down
rendering, in particular when the item spends less time redrawing
than <a href="qgraphicsitem.html">QGraphicsItem</a> spends
redrawing from the cache. When enabled, the item's <a href="qgraphicsitem.html#paint">paint</a>() function will be called only
once for each call to <a href="qgraphicsitem.html#update">update</a>(); for any subsequent
repaint requests, the Graphics View framework will redraw from the
cache. This approach works particularly well with <a href="qglwidget.html">QGLWidget</a>, which stores all the cache as
OpenGL textures.</p>
<p>Be aware that <a href="qpixmapcache.html">QPixmapCache</a>'s
cache limit may need to be changed to obtain optimal
performance.</p>
<p>You can read more about the different cache modes in the
<a href="qgraphicsitem.html#CacheMode-enum">CacheMode</a>
documentation.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#cacheMode">cacheMode</a>(), <a href="qgraphicsitem.html#CacheMode-enum">CacheMode</a>, and <a href="qpixmapcache.html#setCacheLimit">QPixmapCache.setCacheLimit</a>().</p>
<h3 class="fn"><a name="setCursor" />QGraphicsItem.setCursor (<i>self</i>, <a href="qcursor.html">QCursor</a> <i>cursor</i>)</h3><p>Sets the current cursor shape for the item to <i>cursor</i>. The
mouse cursor will assume this shape when it's over this item. See
the <a href="qt.html#CursorShape-enum">list of predefined cursor
objects</a> for a range of useful shapes.</p>
<p>An editor item might want to use an I-beam cursor:</p>
<pre class="cpp">
item<span class="operator">-</span><span class="operator">></span>setCursor(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">.</span>IBeamCursor);
</pre>
<p>If no cursor has been set, the cursor of the item beneath is
used.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#cursor">cursor</a>(), <a href="qgraphicsitem.html#hasCursor">hasCursor</a>(), <a href="qgraphicsitem.html#unsetCursor">unsetCursor</a>(), <a href="qwidget.html#cursor-prop">QWidget.cursor</a>, and <a href="qapplication.html#overrideCursor">QApplication.overrideCursor</a>().</p>
<h3 class="fn"><a name="setData" />QGraphicsItem.setData (<i>self</i>, int <i>key</i>, QVariant <i>value</i>)</h3><p>Sets this item's custom data for the key <i>key</i> to
<i>value</i>.</p>
<p>Custom item data is useful for storing arbitrary properties for
any item. Qt does not use this feature for storing data; it is
provided solely for the convenience of the user.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#data">data</a>().</p>
<h3 class="fn"><a name="setEnabled" />QGraphicsItem.setEnabled (<i>self</i>, bool <i>enabled</i>)</h3><p>If <i>enabled</i> is true, the item is enabled; otherwise, it is
disabled.</p>
<p>Disabled items are visible, but they do not receive any events,
and cannot take focus nor be selected. Mouse events are discarded;
they are not propagated unless the item is also invisible, or if it
does not accept mouse events (see <a href="qgraphicsitem.html#acceptedMouseButtons">acceptedMouseButtons</a>()).
A disabled item cannot become the mouse grabber, and as a result of
this, an item loses the grab if it becomes disabled when grabbing
the mouse, just like it loses focus if it had focus when it was
disabled.</p>
<p>Disabled items are traditionally drawn using grayed-out colors
(see <a href="qpalette.html#ColorGroup-enum">QPalette.Disabled</a>).</p>
<p>If you disable a parent item, all its children will also be
disabled. If you enable a parent item, all children will be
enabled, unless they have been explicitly disabled (i.e., if you
call setEnabled(false) on a child, it will not be reenabled if its
parent is disabled, and then enabled again).</p>
<p>Items are enabled by default.</p>
<p><b>Note:</b> If you install an event filter, you can still
intercept events before they are delivered to items; this mechanism
disregards the item's enabled state.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isEnabled">isEnabled</a>().</p>
<h3 class="fn"><a name="setFiltersChildEvents" />QGraphicsItem.setFiltersChildEvents (<i>self</i>, bool <i>enabled</i>)</h3><p>If <i>enabled</i> is true, this item is set to filter all events
for all its children (i.e., all events intented for any of its
children are instead sent to this item); otherwise, if
<i>enabled</i> is false, this item will only handle its own events.
The default value is false.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#filtersChildEvents">filtersChildEvents</a>().</p>
<h3 class="fn"><a name="setFlag" />QGraphicsItem.setFlag (<i>self</i>, <a href="qgraphicsitem.html#GraphicsItemFlag-enum">GraphicsItemFlag</a> <i>flag</i>, bool <i>enabled</i> = True)</h3><p>If <i>enabled</i> is true, the item flag <i>flag</i> is enabled;
otherwise, it is disabled.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#flags">flags</a>()
and <a href="qgraphicsitem.html#setFlags">setFlags</a>().</p>
<h3 class="fn"><a name="setFlags" />QGraphicsItem.setFlags (<i>self</i>, <a href="qgraphicsitem-graphicsitemflags.html">GraphicsItemFlags</a> <i>flags</i>)</h3><p>Sets the item flags to <i>flags</i>. All flags in <i>flags</i>
are enabled; all flags not in <i>flags</i> are disabled.</p>
<p>If the item had focus and <i>flags</i> does not enable <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsFocusable</a>, the
item loses focus as a result of calling this function. Similarly,
if the item was selected, and <i>flags</i> does not enabled
<a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsSelectable</a>,
the item is automatically unselected.</p>
<p>By default, no flags are enabled. (<a href="qgraphicswidget.html">QGraphicsWidget</a> enables the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemSendsGeometryChanges</a>
flag by default in order to track position changes.)</p>
<p><b>See also</b> <a href="qgraphicsitem.html#flags">flags</a>()
and <a href="qgraphicsitem.html#setFlag">setFlag</a>().</p>
<h3 class="fn"><a name="setFocus" />QGraphicsItem.setFocus (<i>self</i>, <a href="qt.html#FocusReason-enum">Qt.FocusReason</a> <i>focusReason</i> = Qt.OtherFocusReason)</h3><p>Gives keyboard input focus to this item. The <i>focusReason</i>
argument will be passed into any <a href="qfocusevent.html">focus
event</a> generated by this function; it is used to give an
explanation of what caused the item to get focus.</p>
<p>Only enabled items that set the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsFocusable</a> flag
can accept keyboard focus.</p>
<p>If this item is not visible, not active, or not associated with
a scene, it will not gain immediate input focus. However, it will
be registered as the preferred focus item for its subtree of items,
should it later become visible.</p>
<p>As a result of calling this function, this item will receive a
<a href="qgraphicsitem.html#focusInEvent">focus in event</a> with
<i>focusReason</i>. If another item already has focus, that item
will first receive a <a href="qgraphicsitem.html#focusOutEvent">focus out event</a> indicating
that it has lost input focus.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#clearFocus">clearFocus</a>(), <a href="qgraphicsitem.html#hasFocus">hasFocus</a>(), <a href="qgraphicsitem.html#focusItem">focusItem</a>(), and <a href="qgraphicsitem.html#focusProxy">focusProxy</a>().</p>
<h3 class="fn"><a name="setFocusProxy" />QGraphicsItem.setFocusProxy (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>item</i>)</h3><p>Sets the item's focus proxy to <i>item</i>.</p>
<p>If an item has a focus proxy, the focus proxy will receive input
focus when the item gains input focus. The item itself will still
have focus (i.e., <a href="qgraphicsitem.html#hasFocus">hasFocus</a>() will return true), but
only the focus proxy will receive the keyboard input.</p>
<p>A focus proxy can itself have a focus proxy, and so on. In such
case, keyboard input will be handled by the outermost focus
proxy.</p>
<p>The focus proxy <i>item</i> must belong to the same scene as
this item.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#focusProxy">focusProxy</a>(), <a href="qgraphicsitem.html#setFocus">setFocus</a>(), and <a href="qgraphicsitem.html#hasFocus">hasFocus</a>().</p>
<h3 class="fn"><a name="setGraphicsEffect" />QGraphicsItem.setGraphicsEffect (<i>self</i>, <a href="qgraphicseffect.html">QGraphicsEffect</a> <i>effect</i>)</h3><p>The <i>effect</i> argument has it's ownership transferred to Qt.</p><p>Sets <i>effect</i> as the item's effect. If there already is an
effect installed on this item, <a href="qgraphicsitem.html">QGraphicsItem</a> will delete the existing
effect before installing the new <i>effect</i>.</p>
<p>If <i>effect</i> is the installed on a different item,
setGraphicsEffect() will remove the effect from the item and
install it on this item.</p>
<p><a href="qgraphicsitem.html">QGraphicsItem</a> takes ownership
of <i>effect</i>.</p>
<p><b>Note:</b> This function will apply the effect on itself and
all its children.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#graphicsEffect">graphicsEffect</a>().</p>
<h3 class="fn"><a name="setGroup" />QGraphicsItem.setGroup (<i>self</i>, <a href="qgraphicsitemgroup.html">QGraphicsItemGroup</a> <i>group</i>)</h3><p>Adds this item to the item group <i>group</i>. If <i>group</i>
is 0, this item is removed from any current group and added as a
child of the previous group's parent.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#group">group</a>()
and <a href="qgraphicsscene.html#createItemGroup">QGraphicsScene.createItemGroup</a>().</p>
<h3 class="fn"><a name="setHandlesChildEvents" />QGraphicsItem.setHandlesChildEvents (<i>self</i>, bool <i>enabled</i>)</h3><h3 class="fn"><a name="setInputMethodHints" />QGraphicsItem.setInputMethodHints (<i>self</i>, <a href="qt-inputmethodhints.html">Qt.InputMethodHints</a> <i>hints</i>)</h3><p>Sets the current input method hints of this item to
<i>hints</i>.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#inputMethodHints">inputMethodHints</a>(),
<a href="qgraphicsitem.html#inputMethodQuery">inputMethodQuery</a>(), and
<a href="qinputcontext.html">QInputContext</a>.</p>
<h3 class="fn"><a name="setMatrix" />QGraphicsItem.setMatrix (<i>self</i>, <a href="qmatrix.html">QMatrix</a> <i>matrix</i>, bool <i>combine</i> = False)</h3><h3 class="fn"><a name="setOpacity" />QGraphicsItem.setOpacity (<i>self</i>, float <i>opacity</i>)</h3><p>Sets this item's local <i>opacity</i>, between 0.0 (transparent)
and 1.0 (opaque). The item's local opacity is combined with parent
and ancestor opacities into the <a href="qgraphicsitem.html#effectiveOpacity">effectiveOpacity</a>().</p>
<p>By default, opacity propagates from parent to child, so if a
parent's opacity is 0.5 and the child is also 0.5, the child's
effective opacity will be 0.25.</p>
<p>The opacity property decides the state of the painter passed to
the <a href="qgraphicsitem.html#paint">paint</a>() function. If the
item is cached, i.e., <a href="qgraphicsitem.html#CacheMode-enum">ItemCoordinateCache</a> or
<a href="qgraphicsitem.html#CacheMode-enum">DeviceCoordinateCache</a>, the
effective property will be applied to the item's cache as it is
rendered.</p>
<p>There are two item flags that affect how the item's opacity is
combined with the parent: <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIgnoresParentOpacity</a>
and <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemDoesntPropagateOpacityToChildren</a>.</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#opacity">opacity</a>() and <a href="qgraphicsitem.html#effectiveOpacity">effectiveOpacity</a>().</p>
<h3 class="fn"><a name="setPanelModality" />QGraphicsItem.setPanelModality (<i>self</i>, <a href="qgraphicsitem.html#PanelModality-enum">PanelModality</a> <i>panelModality</i>)</h3><p>Sets the modality for this item to <i>panelModality</i>.</p>
<p>Changing the modality of a visible item takes effect
immediately.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#panelModality">panelModality</a>().</p>
<h3 class="fn"><a name="setParentItem" />QGraphicsItem.setParentItem (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>parent</i>)</h3><p>The <i>parent</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><p>Sets this item's parent item to <i>newParent</i>. If this item
already has a parent, it is first removed from the previous parent.
If <i>newParent</i> is 0, this item will become a top-level
item.</p>
<p>Note that this implicitly adds this graphics item to the scene
of the parent. You should not <a href="qgraphicsscene.html#addItem">add</a> the item to the scene
yourself.</p>
<p>Calling this function on an item that is an ancestor of
<i>newParent</i> have undefined behaviour.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#parentItem">parentItem</a>() and <a href="qgraphicsitem.html#childItems">childItems</a>().</p>
<h3 class="fn"><a name="setPos" />QGraphicsItem.setPos (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>pos</i>)</h3><p>Sets the position of the item to <i>pos</i>, which is in parent
coordinates. For items with no parent, <i>pos</i> is in scene
coordinates.</p>
<p>The position of the item describes its origin (local coordinate
(0, 0)) in parent coordinates.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#pos">pos</a>(),
<a href="qgraphicsitem.html#scenePos">scenePos</a>(), and <a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>.</p>
<h3 class="fn"><a name="setPos-2" />QGraphicsItem.setPos (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</h3><p>This is an overloaded function.</p>
<p>This convenience function is equivalent to calling
setPos(<a href="qpointf.html">QPointF</a>(<i>x</i>, <i>y</i>)).</p>
<h3 class="fn"><a name="setRotation" />QGraphicsItem.setRotation (<i>self</i>, float <i>angle</i>)</h3><p>Sets the clockwise rotation <i>angle</i>, in degrees, around the
Z axis. The default value is 0 (i.e., the item is not rotated).
Assigning a negative value will rotate the item counter-clockwise.
Normally the rotation angle is in the range (-360, 360), but it's
also possible to assign values outside of this range (e.g., a
rotation of 370 degrees is the same as a rotation of 10
degrees).</p>
<p>The item is rotated around its transform origin point, which by
default is (0, 0). You can select a different transformation origin
by calling <a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>().</p>
<p>The rotation is combined with the item's <a href="qgraphicsitem.html#scale">scale</a>(), <a href="qgraphicsitem.html#transform">transform</a>() and <a href="qgraphicsitem.html#transformations">transformations</a>() to map
the item's coordinate system to the parent item.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#rotation">rotation</a>(), <a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>(),
and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="setScale" />QGraphicsItem.setScale (<i>self</i>, float <i>scale</i>)</h3><p>Sets the scale <i>factor</i> of the item. The default scale
factor is 1.0 (i.e., the item is not scaled). A scale factor of 0.0
will collapse the item to a single point. If you provide a negative
scale factor, the item will be flipped and mirrored (i.e., rotated
180 degrees).</p>
<p>The item is scaled around its transform origin point, which by
default is (0, 0). You can select a different transformation origin
by calling <a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>().</p>
<p>The scale is combined with the item's <a href="qgraphicsitem.html#rotation">rotation</a>(), <a href="qgraphicsitem.html#transform">transform</a>() and <a href="qgraphicsitem.html#transformations">transformations</a>() to map
the item's coordinate system to the parent item.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#scale">scale</a>(),
<a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>(),
and <a href="painting-transformations.html">Transformations
Example</a>.</p>
<h3 class="fn"><a name="setSelected" />QGraphicsItem.setSelected (<i>self</i>, bool <i>selected</i>)</h3><p>If <i>selected</i> is true and this item is selectable, this
item is selected; otherwise, it is unselected.</p>
<p>If the item is in a group, the whole group's selected state is
toggled by this function. If the group is selected, all items in
the group are also selected, and if the group is not selected, no
item in the group is selected.</p>
<p>Only visible, enabled, selectable items can be selected. If
<i>selected</i> is true and this item is either invisible or
disabled or unselectable, this function does nothing.</p>
<p>By default, items cannot be selected. To enable selection, set
the <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemIsSelectable</a>
flag.</p>
<p>This function is provided for convenience, allowing individual
toggling of the selected state of an item. However, a more common
way of selecting items is to call <a href="qgraphicsscene.html#setSelectionArea">QGraphicsScene.setSelectionArea</a>(),
which will call this function for all visible, enabled, and
selectable items within a specified area on the scene.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isSelected">isSelected</a>() and <a href="qgraphicsscene.html#selectedItems">QGraphicsScene.selectedItems</a>().</p>
<h3 class="fn"><a name="setToolTip" />QGraphicsItem.setToolTip (<i>self</i>, QString <i>toolTip</i>)</h3><p>Sets the item's tool tip to <i>toolTip</i>. If <i>toolTip</i> is
empty, the item's tool tip is cleared.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#toolTip">toolTip</a>() and <a href="qtooltip.html">QToolTip</a>.</p>
<h3 class="fn"><a name="setTransform" />QGraphicsItem.setTransform (<i>self</i>, <a href="qtransform.html">QTransform</a> <i>matrix</i>, bool <i>combine</i> = False)</h3><p>Sets the item's current transformation matrix to
<i>matrix</i>.</p>
<p>If <i>combine</i> is true, then <i>matrix</i> is combined with
the current matrix; otherwise, <i>matrix</i> <i>replaces</i> the
current matrix. <i>combine</i> is false by default.</p>
<p>To simplify interation with items using a transformed view,
<a href="qgraphicsitem.html">QGraphicsItem</a> provides mapTo...
and mapFrom... functions that can translate between items' and the
scene's coordinates. For example, you can call <a href="qgraphicsitem.html#mapToScene">mapToScene</a>() to map an item
coordiate to a scene coordinate, or <a href="qgraphicsitem.html#mapFromScene">mapFromScene</a>() to map from
scene coordinates to item coordinates.</p>
<p>The transformation matrix is combined with the item's <a href="qgraphicsitem.html#rotation">rotation</a>(), <a href="qgraphicsitem.html#scale">scale</a>() and <a href="qgraphicsitem.html#transformations">transformations</a>() into a
combined transformation that maps the item's coordinate system to
its parent.</p>
<p>This function was introduced in Qt 4.3.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#transform">transform</a>(), <a href="qgraphicsitem.html#setRotation">setRotation</a>(), <a href="qgraphicsitem.html#setScale">setScale</a>(), <a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>(),
<a href="graphicsview.html#the-graphics-view-coordinate-system">The
Graphics View Coordinate System</a>, and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="setTransformations" />QGraphicsItem.setTransformations (<i>self</i>, unknown-type <i>transformations</i>)</h3><p>Sets a list of graphics <i>transformations</i> (<a href="qgraphicstransform.html">QGraphicsTransform</a>) that currently
apply to this item.</p>
<p>If all you want is to rotate or scale an item, you should call
<a href="qgraphicsitem.html#setRotation">setRotation</a>() or
<a href="qgraphicsitem.html#setScale">setScale</a>() instead. If
you want to set an arbitrary transformation on an item, you can
call <a href="qgraphicsitem.html#setTransform">setTransform</a>().</p>
<p><a href="qgraphicstransform.html">QGraphicsTransform</a> is for
applying and controlling a chain of individual transformation
operations on an item. It's particularly useful in animations,
where each transform operation needs to be interpolated
independently, or differently.</p>
<p>The transformations are combined with the item's <a href="qgraphicsitem.html#rotation">rotation</a>(), <a href="qgraphicsitem.html#scale">scale</a>() and <a href="qgraphicsitem.html#transform">transform</a>() to map the item's
coordinate system to the parent item.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#transformations">transformations</a>(),
<a href="qgraphicsitem.html#scale">scale</a>(), <a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>(),
and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="setTransformOriginPoint" />QGraphicsItem.setTransformOriginPoint (<i>self</i>, <a href="qpointf.html">QPointF</a> <i>origin</i>)</h3><p>Sets the <i>origin</i> point for the transformation in item
coordinates.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#transformOriginPoint">transformOriginPoint</a>()
and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="setTransformOriginPoint-2" />QGraphicsItem.setTransformOriginPoint (<i>self</i>, float <i>ax</i>, float <i>ay</i>)</h3><p>This is an overloaded function.</p>
<p>Sets the origin point for the transformation in item
coordinates. This is equivalent to calling
setTransformOriginPoint(<a href="qpointf.html">QPointF</a>(<i>x</i>, <i>y</i>)).</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>()
and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="setVisible" />QGraphicsItem.setVisible (<i>self</i>, bool <i>visible</i>)</h3><p>If <i>visible</i> is true, the item is made visible. Otherwise,
the item is made invisible. Invisible items are not painted, nor do
they receive any events. In particular, mouse events pass right
through invisible items, and are delivered to any item that may be
behind. Invisible items are also unselectable, they cannot take
input focus, and are not detected by <a href="qgraphicsscene.html">QGraphicsScene</a>'s item location
functions.</p>
<p>If an item becomes invisible while grabbing the mouse, (i.e.,
while it is receiving mouse events,) it will automatically lose the
mouse grab, and the grab is not regained by making the item visible
again; it must receive a new mouse press to regain the mouse
grab.</p>
<p>Similarly, an invisible item cannot have focus, so if the item
has focus when it becomes invisible, it will lose focus, and the
focus is not regained by simply making the item visible again.</p>
<p>If you hide a parent item, all its children will also be hidden.
If you show a parent item, all children will be shown, unless they
have been explicitly hidden (i.e., if you call setVisible(false) on
a child, it will not be reshown even if its parent is hidden, and
then shown again).</p>
<p>Items are visible by default; it is unnecessary to call
setVisible() on a new item.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isVisible">isVisible</a>(), <a href="qgraphicsitem.html#show">show</a>(), and <a href="qgraphicsitem.html#hide">hide</a>().</p>
<h3 class="fn"><a name="setX" />QGraphicsItem.setX (<i>self</i>, float <i>x</i>)</h3><p>Set's the <i>x</i> coordinate of the item's position. Equivalent
to calling setPos(x, <a href="qgraphicsitem.html#y">y</a>()).</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#x">x</a>() and
<a href="qgraphicsitem.html#setPos">setPos</a>().</p>
<h3 class="fn"><a name="setY" />QGraphicsItem.setY (<i>self</i>, float <i>y</i>)</h3><p>Set's the <i>y</i> coordinate of the item's position. Equivalent
to calling setPos(<a href="qgraphicsitem.html#x">x</a>(), y).</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#y">y</a>(), <a href="qgraphicsitem.html#x">x</a>(), and <a href="qgraphicsitem.html#setPos">setPos</a>().</p>
<h3 class="fn"><a name="setZValue" />QGraphicsItem.setZValue (<i>self</i>, float <i>z</i>)</h3><p>Sets the Z-value of the item to <i>z</i>. The Z value decides
the stacking order of sibling (neighboring) items. A sibling item
of high Z value will always be drawn on top of another sibling item
with a lower Z value.</p>
<p>If you restore the Z value, the item's insertion order will
decide its stacking order.</p>
<p>The Z-value does not affect the item's size in any way.</p>
<p>The default Z-value is 0.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#zValue">zValue</a>(), <a href="qgraphicsitem.html#sorting">Sorting</a>, <a href="qgraphicsitem.html#stackBefore">stackBefore</a>(), and <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemStacksBehindParent</a>.</p>
<h3 class="fn"><a name="shape" /><a href="qpainterpath.html">QPainterPath</a> QGraphicsItem.shape (<i>self</i>)</h3><p>Returns the shape of this item as a <a href="qpainterpath.html">QPainterPath</a> in local coordinates. The
shape is used for many things, including collision detection, hit
tests, and for the <a href="qgraphicsscene.html#items">QGraphicsScene.items</a>()
functions.</p>
<p>The default implementation calls <a href="qgraphicsitem.html#boundingRect">boundingRect</a>() to return a
simple rectangular shape, but subclasses can reimplement this
function to return a more accurate shape for non-rectangular items.
For example, a round item may choose to return an elliptic shape
for better collision detection. For example:</p>
<pre class="cpp">
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> RoundItem<span class="operator">.</span>shape() <span class="keyword">const</span>
{
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path;
path<span class="operator">.</span>addEllipse(boundingRect());
<span class="keyword">return</span> path;
}
</pre>
<p>The outline of a shape can vary depending on the width and style
of the pen used when drawing. If you want to include this outline
in the item's shape, you can create a shape from the stroke using
<a href="qpainterpathstroker.html">QPainterPathStroker</a>.</p>
<p>This function is called by the default implementations of
<a href="qgraphicsitem.html#contains">contains</a>() and <a href="qgraphicsitem.html#collidesWithPath">collidesWithPath</a>().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#boundingRect">boundingRect</a>(), <a href="qgraphicsitem.html#contains">contains</a>(), <a href="qgraphicsitem.html#prepareGeometryChange">prepareGeometryChange</a>(),
and <a href="qpainterpathstroker.html">QPainterPathStroker</a>.</p>
<h3 class="fn"><a name="shear" />QGraphicsItem.shear (<i>self</i>, float <i>sh</i>, float <i>sv</i>)</h3><h3 class="fn"><a name="show" />QGraphicsItem.show (<i>self</i>)</h3><p>Shows the item. (Items are visible by default.)</p>
<p>This convenience function is equivalent to calling
<tt>setVisible(true)</tt>.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#hide">hide</a>() and
<a href="qgraphicsitem.html#setVisible">setVisible</a>().</p>
<h3 class="fn"><a name="stackBefore" />QGraphicsItem.stackBefore (<i>self</i>, <a href="qgraphicsitem.html">QGraphicsItem</a> <i>sibling</i>)</h3><p>Stacks this item before <i>sibling</i>, which must be a sibling
item (i.e., the two items must share the same parent item, or must
both be toplevel items). The <i>sibling</i> must have the same Z
value as this item, otherwise calling this function will have no
effect.</p>
<p>By default, all sibling items are stacked by insertion order
(i.e., the first item you add is drawn before the next item you
add). If two items' Z values are different, then the item with the
highest Z value is drawn on top. When the Z values are the same,
the insertion order will decide the stacking order.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setZValue">setZValue</a>(), <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemStacksBehindParent</a>,
and <a href="qgraphicsitem.html#sorting">Sorting</a>.</p>
<h3 class="fn"><a name="toGraphicsObject" /><a href="qgraphicsobject.html">QGraphicsObject</a> QGraphicsItem.toGraphicsObject (<i>self</i>)</h3><p>Return the graphics item cast to a <a href="qgraphicsobject.html">QGraphicsObject</a>, if the class is
actually a graphics object, 0 otherwise.</p>
<p>This function was introduced in Qt 4.6.</p>
<h3 class="fn"><a name="toolTip" />QString QGraphicsItem.toolTip (<i>self</i>)</h3><p>Returns the item's tool tip, or an empty <a href="qstring.html">QString</a> if no tool tip has been set.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setToolTip">setToolTip</a>() and <a href="qtooltip.html">QToolTip</a>.</p>
<h3 class="fn"><a name="topLevelItem" /><a href="qgraphicsitem.html">QGraphicsItem</a> QGraphicsItem.topLevelItem (<i>self</i>)</h3><p>Returns this item's top-level item. The top-level item is the
item's topmost ancestor item whose parent is 0. If an item has no
parent, its own pointer is returned (i.e., a top-level item is its
own top-level item).</p>
<p><b>See also</b> <a href="qgraphicsitem.html#parentItem">parentItem</a>().</p>
<h3 class="fn"><a name="topLevelWidget" /><a href="qgraphicswidget.html">QGraphicsWidget</a> QGraphicsItem.topLevelWidget (<i>self</i>)</h3><p>Returns a pointer to the item's top level widget (i.e., the
item's ancestor whose parent is 0, or whose parent is not a
widget), or 0 if this item does not have a top level widget. If the
item is its own top level widget, this function returns a pointer
to the item itself.</p>
<p>This function was introduced in Qt 4.4.</p>
<h3 class="fn"><a name="transform" /><a href="qtransform.html">QTransform</a> QGraphicsItem.transform (<i>self</i>)</h3><p>Returns this item's transformation matrix.</p>
<p>The transformation matrix is combined with the item's <a href="qgraphicsitem.html#rotation">rotation</a>(), <a href="qgraphicsitem.html#scale">scale</a>() and <a href="qgraphicsitem.html#transformations">transformations</a>() into a
combined transformations for the item.</p>
<p>The default transformation matrix is an identity matrix.</p>
<p>This function was introduced in Qt 4.3.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setTransform">setTransform</a>() and <a href="qgraphicsitem.html#sceneTransform">sceneTransform</a>().</p>
<h3 class="fn"><a name="transformations" />unknown-type QGraphicsItem.transformations (<i>self</i>)</h3><p>Returns a list of graphics transforms that currently apply to
this item.</p>
<p><a href="qgraphicstransform.html">QGraphicsTransform</a> is for
applying and controlling a chain of individual transformation
operations on an item. It's particularly useful in animations,
where each transform operation needs to be interpolated
independently, or differently.</p>
<p>The transformations are combined with the item's <a href="qgraphicsitem.html#rotation">rotation</a>(), <a href="qgraphicsitem.html#scale">scale</a>() and <a href="qgraphicsitem.html#transform">transform</a>() to map the item's
coordinate system to the parent item.</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setTransformations">setTransformations</a>(),
<a href="qgraphicsitem.html#scale">scale</a>(), <a href="qgraphicsitem.html#rotation">rotation</a>(), <a href="qgraphicsitem.html#transformOriginPoint">transformOriginPoint</a>(),
and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="transformOriginPoint" /><a href="qpointf.html">QPointF</a> QGraphicsItem.transformOriginPoint (<i>self</i>)</h3><p>Returns the origin point for the transformation in item
coordinates.</p>
<p>The default is <a href="qpointf.html">QPointF</a>(0,0).</p>
<p>This function was introduced in Qt 4.6.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setTransformOriginPoint">setTransformOriginPoint</a>()
and <a href="qgraphicsitem.html#transformations">Transformations</a>.</p>
<h3 class="fn"><a name="translate" />QGraphicsItem.translate (<i>self</i>, float <i>dx</i>, float <i>dy</i>)</h3><h3 class="fn"><a name="type" />int QGraphicsItem.type (<i>self</i>)</h3><p>Returns the type of an item as an int. All standard graphicsitem
classes are associated with a unique value; see <a href="qgraphicsitem.html#Type-varx">QGraphicsItem.Type</a>. This type
information is used by <a href="qgraphicsitem.html#qgraphicsitem_cast">qgraphicsitem_cast</a>() to
distinguish between types.</p>
<p>The default implementation (in <a href="qgraphicsitem.html">QGraphicsItem</a>) returns <a href="qgraphicsitem.html#UserType-var">UserType</a>.</p>
<p>To enable use of <a href="qgraphicsitem.html#qgraphicsitem_cast">qgraphicsitem_cast</a>()
with a custom item, reimplement this function and declare a Type
enum value equal to your custom item's type. Custom items must
return a value larger than or equal to <a href="qgraphicsitem.html#UserType-var">UserType</a> (65536).</p>
<p>For example:</p>
<pre class="cpp">
<span class="keyword">class</span> CustomItem : <span class="keyword">public</span> <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span>
{
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
<span class="keyword">enum</span> { Type <span class="operator">=</span> UserType <span class="operator">+</span> <span class="number">1</span> };
<span class="type">int</span> type() <span class="keyword">const</span>
{
<span class="comment">// Enable the use of qgraphicsitem_cast with this item.</span>
<span class="keyword">return</span> Type;
}
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
};
</pre>
<p><b>See also</b> <a href="qgraphicsitem.html#UserType-var">UserType</a>.</p>
<h3 class="fn"><a name="ungrabKeyboard" />QGraphicsItem.ungrabKeyboard (<i>self</i>)</h3><p>Releases the keyboard grab.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#grabKeyboard">grabKeyboard</a>() and <a href="qgraphicsitem.html#ungrabMouse">ungrabMouse</a>().</p>
<h3 class="fn"><a name="ungrabMouse" />QGraphicsItem.ungrabMouse (<i>self</i>)</h3><p>Releases the mouse grab.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#grabMouse">grabMouse</a>() and <a href="qgraphicsitem.html#ungrabKeyboard">ungrabKeyboard</a>().</p>
<h3 class="fn"><a name="unsetCursor" />QGraphicsItem.unsetCursor (<i>self</i>)</h3><p>Clears the cursor from this item.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#hasCursor">hasCursor</a>() and <a href="qgraphicsitem.html#setCursor">setCursor</a>().</p>
<h3 class="fn"><a name="update" />QGraphicsItem.update (<i>self</i>, <a href="qrectf.html">QRectF</a> <i>rect</i> = QRectF())</h3><p>Schedules a redraw of the area covered by <i>rect</i> in this
item. You can call this function whenever your item needs to be
redrawn, such as if it changes appearance or size.</p>
<p>This function does not cause an immediate paint; instead it
schedules a paint request that is processed by <a href="qgraphicsview.html">QGraphicsView</a> after control reaches the
event loop. The item will only be redrawn if it is visible in any
associated view.</p>
<p>As a side effect of the item being repainted, other items that
overlap the area <i>rect</i> may also be repainted.</p>
<p>If the item is invisible (i.e., <a href="qgraphicsitem.html#isVisible">isVisible</a>() returns false), this
function does nothing.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#paint">paint</a>()
and <a href="qgraphicsitem.html#boundingRect">boundingRect</a>().</p>
<h3 class="fn"><a name="update-2" />QGraphicsItem.update (<i>self</i>, float <i>ax</i>, float <i>ay</i>, float <i>width</i>, float <i>height</i>)</h3><p>This is an overloaded function.</p>
<p>This convenience function is equivalent to calling
update(<a href="qrectf.html">QRectF</a>(<i>x</i>, <i>y</i>,
<i>width</i>, <i>height</i>)).</p>
<h3 class="fn"><a name="updateMicroFocus" />QGraphicsItem.updateMicroFocus (<i>self</i>)</h3><p>Updates the item's micro focus.</p>
<p>This function was introduced in Qt 4.7.</p>
<p><b>See also</b> <a href="qinputcontext.html">QInputContext</a>.</p>
<h3 class="fn"><a name="wheelEvent" />QGraphicsItem.wheelEvent (<i>self</i>, <a href="qgraphicsscenewheelevent.html">QGraphicsSceneWheelEvent</a> <i>event</i>)</h3><p>This event handler, for event <i>event</i>, can be reimplemented
to receive wheel events for this item. If you reimplement this
function, <i>event</i> will be accepted by default.</p>
<p>If you ignore the event, (i.e., by calling <a href="qevent.html#ignore">QEvent.ignore</a>(),) it will propagate to
any item beneath this item. If no items accept the event, it will
be ignored by the scene, and propagate to the view (e.g., the
view's vertical scroll bar).</p>
<p>The default implementation ignores the event.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#sceneEvent">sceneEvent</a>().</p>
<h3 class="fn"><a name="window" /><a href="qgraphicswidget.html">QGraphicsWidget</a> QGraphicsItem.window (<i>self</i>)</h3><p>Returns the item's window, or 0 if this item does not have a
window. If the item is a window, it will return itself. Otherwise
it will return the closest ancestor that is a window.</p>
<p>This function was introduced in Qt 4.4.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#isWindow">QGraphicsWidget.isWindow</a>().</p>
<h3 class="fn"><a name="x" />float QGraphicsItem.x (<i>self</i>)</h3><p>This convenience function is equivalent to calling <a href="qgraphicsitem.html#pos">pos</a>().x().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setX">setX</a>() and
<a href="qgraphicsitem.html#y">y</a>().</p>
<h3 class="fn"><a name="y" />float QGraphicsItem.y (<i>self</i>)</h3><p>This convenience function is equivalent to calling <a href="qgraphicsitem.html#pos">pos</a>().y().</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setY">setY</a>() and
<a href="qgraphicsitem.html#x">x</a>().</p>
<h3 class="fn"><a name="zValue" />float QGraphicsItem.zValue (<i>self</i>)</h3><p>Returns the Z-value of the item. The Z-value affects the
stacking order of sibling (neighboring) items.</p>
<p>The default Z-value is 0.</p>
<p><b>See also</b> <a href="qgraphicsitem.html#setZValue">setZValue</a>(), <a href="qgraphicsitem.html#sorting">Sorting</a>, <a href="qgraphicsitem.html#stackBefore">stackBefore</a>(), and <a href="qgraphicsitem.html#GraphicsItemFlag-enum">ItemStacksBehindParent</a>.</p>
<hr /><h2>Member Documentation</h2><h3 class="fn"><a name="UserType-var" />int UserType</h3><p>This member should be treated as a constant.</p><p>The lowest permitted type value for custom items (subclasses of
<a href="qgraphicsitem.html">QGraphicsItem</a> or any of the
standard items). This value is used in conjunction with a
reimplementation of <a href="qgraphicsitem.html#type">QGraphicsItem.type</a>() and declaring a
Type enum value. Example:</p>
<pre class="cpp">
<span class="keyword">class</span> CustomItem : <span class="keyword">public</span> <span class="type"><a href="qgraphicsitem.html">QGraphicsItem</a></span>
{
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
<span class="keyword">enum</span> { Type <span class="operator">=</span> UserType <span class="operator">+</span> <span class="number">1</span> };
<span class="type">int</span> type() <span class="keyword">const</span>
{
<span class="comment">// Enable the use of qgraphicsitem_cast with this item.</span>
<span class="keyword">return</span> Type;
}
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
};
</pre>
<p><b>Note:</b> UserType = 65536</p>
<address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td align="left" width="25%">PyQt 4.12.1 for X11</td><td align="center" width="50%">Copyright © <a href="http://www.riverbankcomputing.com">Riverbank Computing Ltd</a> and <a href="http://www.qt.io">The Qt Company</a> 2015</td><td align="right" width="25%">Qt 4.8.7</td></tr></table></div></address></body></html>
|
