File: xtb.c

package info (click to toggle)
xgraph 12.1-16
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 1,204 kB
  • sloc: ansic: 7,914; sh: 330; makefile: 36
file content (1619 lines) | stat: -rw-r--r-- 38,124 bytes parent folder | download | duplicates (3)
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
/*LINTLIBRARY*/
/*
 * Mini-Toolbox
 *
 * David Harrison
 * University of California, Berkeley
 * 1988, 1989
 *
 * This file contains routines which implement simple display widgets
 * which can be used to construct simple dialog boxes.
 * A mini-toolbox has been written here (overkill but I didn't
 * want to use any of the standards yet -- they are too unstable).
 */

#include <stdio.h>
#include <X11/Xos.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xresource.h>
#include <string.h>  /* for strcpy */
#include "xtb.h"

extern void abort();

#define MAXKEYS		10

#ifdef __STDC__
#define FNPTR(fname, rtn, args)	rtn (*fname)args
#include <stdarg.h>
#define VARARGS(func, rtn, args)	rtn func args
#else
#define FNPTR(fname, rtn, args)	rtn (*fname)()
#include <varargs.h>
#define VARARGS(func, rtn, args)	/*VARARGS1*/ rtn func(va_alist) va_dcl
#endif

struct h_info {
    FNPTR(func, xtb_hret, (XEvent * evt, xtb_data info));	/* Function to call */
    xtb_data info;		/* Additional info  */
};

static Display *t_disp;		/* Display          */
static int t_scrn;		/* Screen           */

static unsigned long norm_pix;	/* Foreground color */
static unsigned long back_pix;	/* Background color */

static XFontStruct *norm_font;	/* Normal font      */

extern char *Malloc();

#define STRDUP(str)	(strcpy(Malloc((unsigned) (strlen(str)+1)), (str)))
extern void Free();



void
xtb_init(disp, scrn, foreground, background, font)
Display *disp;			/* Display          */
int     scrn;			/* Screen number    */
unsigned long foreground;	/* Foreground color */
unsigned long background;	/* Background color */
XFontStruct *font;		/* Normal font      */

/*
 * Sets default parameters used by the mini-toolbox.
 */
{
    t_disp = disp;
    t_scrn = scrn;
    norm_pix = foreground;
    back_pix = background;
    norm_font = font;
}


#define gray_width 32
#define gray_height 32
static char gray_bits[] =
{
    0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
    0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa,
    0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
    0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa,
    0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
    0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa,
    0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
    0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa,
    0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
    0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa,
    0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa};

static  Pixmap
make_stipple(disp, able, bits, width, height)
Display *disp;
Drawable able;
char   *bits;
unsigned int     width,
        height;
{
    unsigned int     w,
            h;
    Pixmap  stipple;
    int     bitmap_pad;
    GC      image_gc;
    XGCValues image_vals;
    XImage *stip_image;

    if (!XQueryBestStipple(disp, able, width, height, &w, &h)) {
	/* Can't query best stipple */
	return (Pixmap) 0;
    }
    if ((w > width) || (h > height)) {
	/* Given pattern is too small */
	return (Pixmap) 0;
    }
    if (!(stipple = XCreatePixmap(disp, able, w, h, 1))) {
	/* Can't create pixmap image */
	return (Pixmap) 0;
    }
    bitmap_pad = 8;
    stip_image = XCreateImage(disp, DefaultVisual(disp, DefaultScreen(disp)),
			      1, XYPixmap, 0, bits, width, height,
			      bitmap_pad, 0);
    if (!stip_image)
	return (Pixmap) 0;
    image_gc = XCreateGC(disp, stipple, (unsigned long) 0, &image_vals);
    XPutImage(disp, stipple, image_gc, stip_image, 0, 0, 0, 0, w, h);
    return stipple;
}


static  Pixmap
gray_map(win)
Window  win;

/*
 * Returns a gray pixmap suitable for stipple fill.
 */
{
    static Pixmap map = (Pixmap) 0;

    if (!map) {
	map = make_stipple(t_disp, win, gray_bits, gray_width, gray_height);
    }
    return map;
}

static  GC
set_gc(win, fg, bg, font, gray_p)
Window  win;			/* For creating GC  */
unsigned long fg;		/* Foreground pixel */
unsigned long bg;		/* Background pixel */
Font    font;			/* Font             */
int     gray_p;			/* Gray if set      */

/*
 * Sets and returns the fields listed above in a global graphics context.
 * If graphics context does not exist,  it is created.
 */
{
    static GC t_gc = (GC) 0;
    XGCValues gcvals;
    unsigned long gcmask;

    gcvals.foreground = fg;
    gcvals.background = bg;
    gcvals.font = font;
    gcvals.stipple = gray_map(win);
    gcvals.fill_style = (gray_p ? FillStippled : FillSolid);
    gcmask = GCForeground | GCBackground | GCFont | GCFillStyle | GCStipple;
    if (t_gc == (GC) 0) {
	t_gc = XCreateGC(t_disp, win, gcmask, &gcvals);
    }
    else {
	XChangeGC(t_disp, t_gc, gcmask, &gcvals);
    }
    return t_gc;
}



static XContext h_context = (XContext) 0;

void
xtb_register(win, func, info)
Window  win;

FNPTR(func, xtb_hret, (XEvent * evt, xtb_data info));
xtb_data info;

/*
 * Associates the event handling function `func' with the window
 * `win'.  Additional information `info' will be passed to `func'.
 * The routine should return one of the return codes given above.
 */
{
    struct h_info *new_info;

    if (h_context == (XContext) 0) {
	h_context = XUniqueContext();
    }
    new_info = (struct h_info *) Malloc(sizeof(struct h_info));
    new_info->func = func;
    new_info->info = info;
    XSaveContext(t_disp, win, h_context, (caddr_t) new_info);
}

xtb_data
xtb_lookup(win)
Window  win;

/*
 * Returns the associated data with window `win'.
 */
{
    xtb_data data;

    if (!XFindContext(t_disp, win, h_context, (XPointer*) &data)) {
	return ((struct h_info *) data)->info;
    }
    else {
	return (xtb_data) 0;
    }
}

xtb_hret
xtb_dispatch(evt)
XEvent *evt;

/*
 * Dispatches an event to a handler if its ours.  Returns one of
 * the return codes given above (XTB_NOTDEF, XTB_HANDLED, or XTB_STOP).
 */
{
    struct h_info *info;

    if (!XFindContext(t_disp, evt->xany.window, h_context, (caddr_t *) & info)) {
	if (info->func)
	    return (*info->func) (evt, info->info);
	else
	    return XTB_NOTDEF;
    }
    else
	return XTB_NOTDEF;
}

int
xtb_unregister(win, info)
Window  win;
xtb_data *info;

/*
 * Removes `win' from the dialog association table.  `info' is
 * returned to allow the user to delete it (if desired).  Returns
 * a non-zero status if the association was found and properly deleted.
 */
{
    struct h_info *hi;

    if (!XFindContext(t_disp, win, h_context, (caddr_t *) & hi)) {
	(void) XDeleteContext(t_disp, win, h_context);
	*info = hi->info;
	Free((char *) hi);
	return 1;
    }
    else
	return 0;
}



#define BT_HPAD	3
#define BT_VPAD	2
#define BT_LPAD	3
#define BT_BRDR	1

struct b_info {
    FNPTR(func, xtb_hret, (Window win, int state, xtb_data val));
    /* Function to call */
    char   *text;		/* Text of button   */
    int     flag;		/* State of button  */
    int     na;			/* Non-zero if not active */
    int     line_y,
            line_w;		/* Entry/Exit line  */
    xtb_data val;		/* User defined info */
};

static void
bt_draw(win, ri)
Window  win;
struct b_info *ri;

/*
 * Draws a button window
 */
{
    if (ri->flag) {
	XDrawImageString(t_disp, win,
			 set_gc(win, back_pix, norm_pix, norm_font->fid, 0),
			 BT_HPAD, BT_VPAD + norm_font->ascent,
			 ri->text, strlen(ri->text));
    }
    else {
	XDrawImageString(t_disp, win,
			 set_gc(win, norm_pix, back_pix, norm_font->fid, 0),
			 BT_HPAD, BT_VPAD + norm_font->ascent,
			 ri->text, strlen(ri->text));
    }
    if (ri->na) {
	Window  root;
	int     x,
	        y;
	unsigned int w,
	        h,
	        b,
	        d;

	XGetGeometry(t_disp, win, &root, &x, &y, &w, &h, &b, &d);
	XFillRectangle(t_disp, win,
		       set_gc(win, (ri->flag ? norm_pix : back_pix),
			      back_pix, norm_font->fid, 1),
		       0, 0, w, h);
    }
}

static void
bt_line(win, ri, pix)
Window  win;
struct b_info *ri;
unsigned long pix;

/*
 * Draws a status line beneath the text to indicate the
 * user has moved into the button.
 */
{
    XDrawLine(t_disp, win,
	      set_gc(win, pix, back_pix, norm_font->fid, ri->na),
	      BT_HPAD, ri->line_y, BT_HPAD + ri->line_w, ri->line_y);
}

static  xtb_hret
bt_h(evt, info)
XEvent *evt;
xtb_data info;

/*
 * Handles button events.
 */
{
    Window  win = evt->xany.window;
    struct b_info *ri = (struct b_info *) info;
    xtb_hret rtn = 0;

    switch (evt->type) {
    case Expose:
	bt_draw(win, ri);
	rtn = XTB_HANDLED;
	break;
    case EnterNotify:
	if (!ri->na)
	    bt_line(win, ri, norm_pix);
	rtn = XTB_HANDLED;
	break;
    case LeaveNotify:
	if (!ri->na)
	    bt_line(win, ri, back_pix);
	rtn = XTB_HANDLED;
	break;
    case ButtonPress:
	/* Nothing - just wait for button up */
	rtn = XTB_HANDLED;
	break;
    case ButtonRelease:
	if (!ri->na)
	    rtn = (*ri->func) (win, ri->flag, ri->val);
	break;
    default:
	rtn = XTB_NOTDEF;
    }
    return rtn;
}

void
xtb_bt_new(win, text, func, val, frame)
Window  win;			/* Parent window     */
char   *text;			/* Text in button    */

FNPTR(func, xtb_hret, (Window, int, xtb_data));	/* Callback */
xtb_data val;			/* User data         */
xtb_frame *frame;		/* Size (RETURN)     */

/*
 * Makes a new button under `win' with the text `text'.  The
 * window, size, and position of the button are returned in `frame'.
 * The initial position is always (0, 0).  When the
 * button is pressed,  `func' will be called with the button
 * window,  the current state of the button,  and `val'.
 * It is up to `func' to change the state of the button (if desired).
 * The routine should return XTB_HANDLED normally and XTB_STOP if the
 * dialog should stop.  The window will be automatically mapped.
 */
{
    XCharStruct bb;
    struct b_info *info;
    int     dir,
            ascent,
            descent;

    XTextExtents(norm_font, text, strlen(text), &dir, &ascent, &descent, &bb);
    frame->width = bb.width + 2 * BT_HPAD;
    frame->height = norm_font->ascent + norm_font->descent + BT_VPAD + BT_LPAD;
    frame->x_loc = frame->y_loc = 0;
    frame->win = XCreateSimpleWindow(t_disp, win,
				     frame->x_loc, frame->y_loc,
				     frame->width, frame->height,
				     BT_BRDR, norm_pix, back_pix);
    XSelectInput(t_disp, frame->win, ExposureMask |
		 ButtonPressMask | ButtonReleaseMask |
		 EnterWindowMask | LeaveWindowMask);
    info = (struct b_info *) Malloc(sizeof(struct b_info));
    info->func = func;
    info->text = STRDUP(text);
    info->flag = 0;
    info->na = 0;
    info->val = val;
    info->line_y = frame->height - 2;
    info->line_w = frame->width - 2 * BT_HPAD;
    xtb_register(frame->win, bt_h, (xtb_data) info);
    XMapWindow(t_disp, frame->win);
    frame->width += (2 * BT_BRDR);
    frame->height += (2 * BT_BRDR);
}

int
xtb_bt_get(win, stuff, na)
Window  win;
xtb_data *stuff;
int    *na;

/*
 * Returns the state of button `win'.  If provided,  the button
 * specific info is returned in `info' and the active state
 * of the button is returned in `na'.
 */
{
    struct b_info *info = (struct b_info *) xtb_lookup(win);

    if (stuff)
	*stuff = info->val;
    if (na)
	*na = info->na;
    return info->flag;
}

int
xtb_bt_set(win, val, stuff, na)
Window  win;
int     val;
xtb_data stuff;
int     na;

/*
 * Changes the value of a button and returns the new state.
 * The button is drawn.  If set,  the button specific info
 * will be set to `info'.  This doesn't allow you to set
 * the state to zero, but that may not be important.  If
 * `na' is non-zero,  the button will be deactivated (no
 * activity will be allowed). The change in button appearance
 * will be immediate.
 */
{
    struct b_info *info = (struct b_info *) xtb_lookup(win);

    info->flag = (val != 0);
    info->na = (na != 0);
    if (stuff)
	info->val = stuff;
    bt_draw(win, info);
    XFlush(t_disp);
    return info->flag;
}

void
xtb_bt_del(win, info)
Window  win;
xtb_data *info;

/*
 * Deletes the button `win' and returns the user defined information
 * in `info' for destruction.
 */
{
    struct b_info *bi;

    if (xtb_unregister(win, (xtb_data *) & bi)) {
	*info = bi->val;
	Free((char *) bi->text);
	Free((char *) bi);
	XDestroyWindow(t_disp, win);
    }
}



#define BR_XPAD		2
#define BR_YPAD		2
#define BR_INTER	2

struct br_info {
    Window  main_win;		/* Main button row    */
    int     which_one;		/* Which button is on */
    int     btn_cnt;		/* How many buttons   */
            FNPTR(func, xtb_hret, (Window win, int prev, int this, xtb_data val));
    xtb_data val;		/* User data          */
    Window *btns;		/* Button windows     */
};

/*ARGSUSED*/
static  xtb_hret
br_h(win, val, info)
Window  win;
int     val;
xtb_data info;

/*
 * This handles events for button rows.  When a button is pressed,
 * it turns off the button selected in `which_one' and turns itself
 * on.
 */
{
    struct br_info *real_info = (struct br_info *) info;
    int     i,
            prev;

    prev = real_info->which_one;
    if ((prev >= 0) && (prev < real_info->btn_cnt)) {
	(void) xtb_bt_set(real_info->btns[prev], 0, (xtb_data) 0, 0);
    }
    for (i = 0; i < real_info->btn_cnt; i++) {
	if (win == real_info->btns[i]) {
	    real_info->which_one = i;
	    break;
	}
    }
    (void) xtb_bt_set(win, 1, (xtb_data) 0, 0);
    /* Callback */
    if (real_info->func) {
	return (*real_info->func) (real_info->main_win,
				   prev, real_info->which_one,
				   real_info->val);
    }
    else {
	return XTB_HANDLED;
    }
}


void
xtb_br_new(win, cnt, lbls, init, func, val, frame)
Window  win;			/* Parent window    */
int     cnt;			/* Count of buttons */
char   *lbls[];			/* Button labels    */
int     init;			/* Initial button   */

FNPTR(func, xtb_hret, (Window, int, int, xtb_data));	/* Callback */
xtb_data val;			/* User data        */
xtb_frame *frame;		/* Returned size    */

/*
 * This routine makes a new row of buttons in the window `win'
 * and returns a frame containing all of these buttons.  These
 * buttons are designed so that only one of them will be active
 * at a time.  Initially,  button `init' will be activated (if
 * init is less than zero,  none will be initially activated).
 * Whenever a button is pushed, `func' will be called with the
 * button row window,  the index of the previous button (-1 if
 * none),  the index of the current button,  and the user data, `val'.
 * The function is optional (if zero,  no function will be called).
 * The size of the row is returned in `frame'.  The window
 * will be automatically mapped.  Initially,  the window containing
 * the buttons will be placed at 0,0 in the parent window.
 */
{
    struct br_info *info;
    xtb_frame sub_frame;
    int     i,
            x,
            y;

    frame->width = frame->height = 0;
    frame->x_loc = frame->y_loc = 0;
    frame->win = XCreateSimpleWindow(t_disp, win, 0, 0, 1, 1,
				     0, back_pix, back_pix);
    info = (struct br_info *) Malloc(sizeof(struct br_info));
    info->main_win = frame->win;
    info->btns = (Window *) Malloc((unsigned) (sizeof(Window) * cnt));
    info->btn_cnt = cnt;
    info->which_one = init;
    info->func = func;
    info->val = val;
    /* the handler is used simply to get information out */
    xtb_register(frame->win, (xtb_hret(*) ()) 0, (xtb_data) info);
    x = BR_XPAD;
    y = BR_YPAD;
    for (i = 0; i < cnt; i++) {
	xtb_bt_new(frame->win, lbls[i], br_h, (xtb_data) info, &sub_frame);
	info->btns[i] = sub_frame.win;
	XMoveWindow(t_disp, info->btns[i], x, y);
	x += (BR_INTER + sub_frame.width);
	if (sub_frame.height > frame->height)
	    frame->height = sub_frame.height;
	if (i == init)
	    (void) xtb_bt_set(info->btns[i], 1, (xtb_data) 0, 0);
    }
    frame->width = x - BR_INTER + BR_XPAD;
    frame->height += (2 * BR_YPAD);
    XResizeWindow(t_disp, frame->win, frame->width, frame->height);
    XMapWindow(t_disp, frame->win);
}

int
xtb_br_get(win)
Window  win;

/*
 * This routine returns the index of the currently selected item of
 * the button row given by the window `win'.  Note:  no checking
 * is done to make sure `win' is a button row.
 */
{
    struct br_info *info = (struct br_info *) xtb_lookup(win);

    return info->which_one;
}

void
xtb_br_del(win)
Window  win;

/*
 * Deletes a button row.  All resources are reclaimed.
 */
{
    struct br_info *info;
    int     i;

    if (xtb_unregister(win, (xtb_data *) & info)) {
	for (i = 0; i < info->btn_cnt; i++) {
	    xtb_bt_del(info->btns[i], (xtb_data *) & info);
	}
	Free((char *) info->btns);
	Free((char *) info);
	XDestroyWindow(t_disp, win);
    }
}



/* Text widget */

#define TO_HPAD	1
#define TO_VPAD	1

struct to_info {
    char   *text;		/* Text to display */
    XFontStruct *ft;		/* Font to use     */
};

static void
to_draw(win, ri)
Window  win;
struct to_info *ri;

/*
 * Draws the text for a widget
 */
{
    XDrawImageString(t_disp, win,
		     set_gc(win, norm_pix, back_pix, ri->ft->fid, 0),
		     TO_HPAD, TO_VPAD + ri->ft->ascent,
		     ri->text, strlen(ri->text));
}

static  xtb_hret
to_h(evt, info)
XEvent *evt;
xtb_data info;

/*
 * Handles text widget events
 */
{
    Window  win = evt->xany.window;
    struct to_info *ri = (struct to_info *) info;

    switch (evt->type) {
    case Expose:
	to_draw(win, ri);
	return XTB_HANDLED;
    default:
	return XTB_NOTDEF;
    }
}

void
xtb_to_new(win, text, ft, frame)
Window  win;			/* Parent window */
char   *text;			/* Text          */
XFontStruct *ft;		/* Font to use   */
xtb_frame *frame;		/* Returned size */

/*
 * Makes a new text widget under `win' with the text `text'.
 * The size of the widget is returned in `w' and `h'.  The
 * window is created and mapped at 0,0 in `win'.  The font
 * used for the text is given in `ft'.
 */
{
    struct to_info *info;

    frame->width = XTextWidth(ft, text, strlen(text)) + 2 * TO_HPAD;
    frame->height = ft->ascent + ft->descent + 2 * TO_VPAD;
    frame->x_loc = frame->y_loc = 0;
    frame->win = XCreateSimpleWindow(t_disp, win, 0, 0,
				     frame->width, frame->height, 0,
				     back_pix, back_pix);
    XSelectInput(t_disp, frame->win, ExposureMask);
    info = (struct to_info *) Malloc(sizeof(struct to_info));
    info->text = STRDUP(text);
    info->ft = ft;
    xtb_register(frame->win, to_h, (xtb_data) info);
    XMapWindow(t_disp, frame->win);
}

void
xtb_to_del(win)
Window  win;

/*
 * Deletes an output only text widget.
 */
{
    struct to_info *info;

    if (xtb_unregister(win, (xtb_data *) & info)) {
	if (info->text)
	    Free((char *) info->text);
	Free((char *) info);
	XDestroyWindow(t_disp, win);
    }
}


/*
 * Input text widget
 */

#define TI_HPAD	2
#define TI_VPAD	2
#define TI_LPAD	3
#define TI_BRDR 2
#define TI_CRSP	1

struct ti_info {
    FNPTR(func, xtb_hret, (Window win, int ch, char *textcopy, xtb_data * val));
    /* Function to call   */
    int     maxlen;		/* Maximum characters */
    int     curidx;		/* Current index pos  */
    int     curxval;		/* Current draw loc   */
    char    text[MAXCHBUF];	/* Current text array */
    int     line_y,
            line_w;		/* Entry/Exit line    */
    int     focus_flag;		/* If on, we have focus */
    xtb_data val;		/* User info          */
};

static int
text_width(font, str, len)
XFontStruct *font;		/* What font       */
char   *str;			/* Character array */
int     len;			/* Length of array */

/*
 * Returns the width of a string using XTextExtents.
 */
{
    XCharStruct bb;
    int     dir,
            ascent,
            descent;

    XTextExtents(font, str, len, &dir, &ascent, &descent, &bb);
    return bb.width;
}

static void
ti_cursor_on(win, ri)
Window  win;
struct ti_info *ri;

/*
 * Draws the cursor for the window.  Uses pixel `pix'.
 */
{
    XFillRectangle(t_disp, win,
		   set_gc(win, norm_pix, back_pix, norm_font->fid, 0),
		   ri->curxval + TI_HPAD + TI_CRSP, TI_VPAD,
		   (ri->focus_flag ? 2 : 1),
		   norm_font->ascent + norm_font->descent - 1);
}

static void
ti_cursor_off(win, ri)
Window  win;
struct ti_info *ri;

/*
 * Draws the cursor for the window.  Uses pixel `pix'.
 */
{
    XFillRectangle(t_disp, win,
		   set_gc(win, back_pix, back_pix, norm_font->fid, 0),
		   ri->curxval + TI_HPAD + TI_CRSP, TI_VPAD,
		   (ri->focus_flag ? 2 : 1),
		   norm_font->ascent + norm_font->descent - 1);
}

static void
ti_draw(win, ri, c_flag)
Window  win;
struct ti_info *ri;
int     c_flag;

/*
 * Draws the indicated text widget.  This includes drawing the
 * text and cursor.  If `c_flag' is set,  the window will
 * be cleared first.
 */
{
    if (c_flag)
	XClearWindow(t_disp, win);
    /* Text */
    XDrawImageString(t_disp, win,
		     set_gc(win, norm_pix, back_pix, norm_font->fid, 0),
		     TI_HPAD, TI_VPAD + norm_font->ascent,
		     ri->text, strlen(ri->text));
    /* Cursor */
    ti_cursor_on(win, ri);
}

static void
ti_line(win, ri, pix)
Window  win;
struct ti_info *ri;
unsigned long pix;

/*
 * Draws a status line beneath the text in a text widget to indicate
 * the user has moved into the text field.
 */
{
    XDrawLine(t_disp, win,
	      set_gc(win, pix, back_pix, norm_font->fid, 0),
	      TI_HPAD, ri->line_y, TI_HPAD + ri->line_w, ri->line_y);
}

/* For debugging */
void focus_evt(evt)
XEvent *evt;
{
    switch (evt->xfocus.mode) {
    case NotifyNormal:
	printf("NotifyNormal");
	break;
    case NotifyGrab:
	printf("NotifyGrab");
	break;
    case NotifyUngrab:
	printf("NotifyUngrab");
	break;
    }
    printf(", detail = ");
    switch (evt->xfocus.detail) {
    case NotifyAncestor:
	printf("NotifyAncestor");
	break;
    case NotifyVirtual:
	printf("NotifyVirtual");
	break;
    case NotifyInferior:
	printf("NotifyInferior");
	break;
    case NotifyNonlinear:
	printf("NotifyNonLinear");
	break;
    case NotifyNonlinearVirtual:
	printf("NotifyNonLinearVirtual");
	break;
    case NotifyPointer:
	printf("NotifyPointer");
	break;
    case NotifyPointerRoot:
	printf("NotifyPointerRoot");
	break;
    case NotifyDetailNone:
	printf("NotifyDetailNone");
	break;
    }
    printf("\n");
}



static  xtb_hret
ti_h(evt, info)
XEvent *evt;
xtb_data info;

/*
 * Handles text input events.
 */
{
    Window  win = evt->xany.window;
    struct ti_info *ri = (struct ti_info *) info;
    char    keys[MAXKEYS],
            textcopy[MAXCHBUF];
    xtb_hret rtn = 0;
    int     nbytes,
            i;

    switch (evt->type) {
    case Expose:
	ti_draw(win, ri, 0);
	rtn = XTB_HANDLED;
	break;
    case KeyPress:
	nbytes = XLookupString(&evt->xkey, keys, MAXKEYS,
			       (KeySym *) 0, (XComposeStatus *) 0);
	for (i = 0; i < nbytes; i++) {
	    (void) strcpy(textcopy, ri->text);
	    if ((rtn = (*ri->func) (win, (int) keys[i],
				    textcopy, ri->val)) == XTB_STOP)
		break;
	}
	break;
    case FocusIn:
	focus_evt(evt);
	if (evt->xfocus.detail != NotifyPointer) {
	    ti_cursor_off(win, ri);
	    ri->focus_flag = 1;
	    ti_cursor_on(win, ri);
	}
	break;
    case FocusOut:
	focus_evt(evt);
	if (evt->xfocus.detail != NotifyPointer) {
	    ti_cursor_off(win, ri);
	    ri->focus_flag = 0;
	    ti_cursor_on(win, ri);
	}
	break;
    case EnterNotify:
	ti_line(win, ri, norm_pix);
	rtn = XTB_HANDLED;
	break;
    case LeaveNotify:
	ti_line(win, ri, back_pix);
	rtn = XTB_HANDLED;
	break;
    case ButtonPress:
	/* Wait for release */
	break;
    case ButtonRelease:
	/* Set input focus */
	XSetInputFocus(t_disp, win, RevertToParent, CurrentTime);
	break;
    default:
	rtn = XTB_NOTDEF;
	break;
    }
    return rtn;
}

void
xtb_ti_new(win, text, maxchar, func, val, frame)
Window  win;			/* Parent window      */
char   *text;			/* Initial text       */
int     maxchar;		/* Maximum characters */

FNPTR(func, xtb_hret, (Window, int, char *, xtb_data *));	/* Callback */
xtb_data val;			/* User data          */
xtb_frame *frame;		/* Returned size      */

/*
 * This routine creates a new editable text widget under `win'
 * with the initial text `text'.  The widget contains only
 * one line of text which cannot exceed `maxchar' characters.
 * The size of the widget is returned in `frame'.  Each
 * time a key is pressed in the window,  `func' will be called
 * with the window, the character, a copy of the text, and `val'.
 * The state of the widget can be changed by the routines below.
 * May set window to zero if the maximum overall character width
 * (MAXCHBUF) is exceeded.
 */
{
    struct ti_info *info;

    if (maxchar >= MAXCHBUF) {
	frame->win = (Window) 0;
	return;
    }
    frame->width = XTextWidth(norm_font, "8", 1) * maxchar + 2 * TI_HPAD;
    frame->height = norm_font->ascent + norm_font->descent + TI_VPAD + TI_LPAD;
    frame->x_loc = frame->y_loc = 0;
    frame->win = XCreateSimpleWindow(t_disp, win, 0, 0,
				     frame->width, frame->height, TI_BRDR,
				     norm_pix, back_pix);
    XSelectInput(t_disp, frame->win, ExposureMask | KeyPressMask |
		 EnterWindowMask | LeaveWindowMask |
		 FocusChangeMask | ButtonPressMask |
		 ButtonReleaseMask);
    info = (struct ti_info *) Malloc(sizeof(struct ti_info));
    info->func = func;
    info->val = val;
    info->maxlen = maxchar;
    if (text)
	(void) strcpy(info->text, text);
    else
	info->text[0] = '\0';
    info->curidx = strlen(info->text);
    info->curxval = text_width(norm_font, info->text, info->curidx);
    info->line_y = frame->height - 2;
    info->line_w = frame->width - 2 * TI_HPAD;
    info->focus_flag = 0;
    xtb_register(frame->win, ti_h, (xtb_data) info);
    XMapWindow(t_disp, frame->win);
    frame->width += (2 * TI_BRDR);
    frame->height += (2 * TI_BRDR);
}

void
xtb_ti_get(win, text, val)
Window  win;			/* Widget widnow  */
char    text[MAXCHBUF];		/* Filled in text */
xtb_data *val;			/* User info      */

/*
 * This routine returns the information associated with text
 * widget `win'.  The text is filled into the passed buffer
 * `text' which should be MAXCHBUF characters in size.  If
 * `val' is non-zero,  the user supplied info is returned there.
 */
{
    struct ti_info *info = (struct ti_info *) xtb_lookup(win);

    if (val)
	*val = info->val;
    (void) strcpy(text, info->text);
}

int
xtb_ti_set(win, text, val)
Window  win;			/* Widget window    */
char   *text;			/* Replacement text */
xtb_data val;			/* User info        */

/*
 * This routine sets the text of a text widget.  The widget
 * will be redrawn.  Note:  for incremental changes,  ti_ins and
 * ti_dch should be used.  If `val' is non-zero,  it will replace
 * the user information for the widget.  The widget is redrawn.
 * Will return zero if `text' is too long.
 */
{
    struct ti_info *info = (struct ti_info *) xtb_lookup(win);
    int     newlen;

    if (text) {
	if ((newlen = strlen(text)) >= info->maxlen)
	    return 0;
    }
    else {
	newlen = 0;
    }
    info->curidx = newlen;
    if (text)
	(void) strcpy(info->text, text);
    else
	info->text[0] = '\0';
    info->curxval = text_width(norm_font, info->text, info->curidx);
    if (val)
	info->val = val;
    ti_draw(win, info, 1);
    return 1;
}

int
xtb_ti_ins(win, ch)
Window  win;			/* Widget window */
int     ch;			/* Character     */

/*
 * Inserts the character `ch' onto the end of the text for `win'.
 * Will return zero if there isn't any more room left.  Does
 * all appropriate display updates.
 */
{
    struct ti_info *info = (struct ti_info *) xtb_lookup(win);
    char    lstr[1];

    if (info->curidx >= info->maxlen - 1)
	return 0;
    info->text[info->curidx] = ch;
    info->text[info->curidx + 1] = '\0';
    /* Turn off cursor */
    ti_cursor_off(win, info);
    /* Text */
    lstr[0] = (char) ch;
    XDrawImageString(t_disp, win,
		     set_gc(win, norm_pix, back_pix, norm_font->fid, 0),
		     info->curxval + TI_HPAD, TI_VPAD + norm_font->ascent,
		     lstr, 1);
    info->curidx += 1;
    info->curxval += text_width(norm_font, lstr, 1);
    ti_cursor_on(win, info);
    return 1;
}

int
xtb_ti_dch(win)
Window  win;			/* Widget window */

/*
 * Deletes the character at the end of the text for `win'.  Will
 * return zero if there aren't any characters to delete.  Does
 * all appropriate display updates.
 */
{
    struct ti_info *info = (struct ti_info *) xtb_lookup(win);
    int     chw;

    if (info->curidx == 0)
	return 0;
    /* Wipe out cursor */
    ti_cursor_off(win, info);
    info->curidx -= 1;
    chw = text_width(norm_font, &(info->text[info->curidx]), 1);
    info->curxval -= chw;
    /* Wipe out character */
    XClearArea(t_disp, win, info->curxval + TI_HPAD, TI_VPAD,
	       (unsigned int) chw + 1,
	       (unsigned int) norm_font->ascent + norm_font->descent,
	       False);
    info->text[info->curidx] = '\0';
    ti_cursor_on(win, info);
    return 1;
}

void
xtb_ti_del(win, info)
Window  win;
xtb_data *info;

/*
 * Deletes an input text widget.  User defined data is returned in `info'.
 */
{
    struct ti_info *ti;

    if (xtb_unregister(win, (xtb_data *) & ti)) {
	*info = ti->val;
	Free((char *) ti);
	XDestroyWindow(t_disp, win);
    }
}


/*
 * Simple colored output frame - usually used for drawing lines
 */

void
xtb_bk_new(win, width, height, frame)
Window  win;			/* Parent window */
unsigned width,
        height;			/* Size          */
xtb_frame *frame;		/* Returned size */

/*
 * This routine creates a new frame that displays a block
 * of color whose size is given by `width' and `height'.
 * It is usually used to draw lines.  No user interaction
 * is defined for the frame.  The color used is the default
 * foreground color set in xtb_init().
 */
{
    frame->x_loc = frame->y_loc = 0;
    frame->width = width;
    frame->height = height;
    frame->win = XCreateSimpleWindow(t_disp, win,
				     frame->x_loc, frame->y_loc,
				     frame->width, frame->height,
				     0, norm_pix, norm_pix);
    XMapWindow(t_disp, frame->win);
}


void
xtb_bk_del(win)
Window  win;

/*
 * Deletes a block frame.
 */
{
    XDestroyWindow(t_disp, win);
}




/*
 * Formatting support
 */

#define ERROR(msg) printf("%s\n", msg); abort();

xtb_fmt *
xtb_w(w)
xtb_frame *w;

/*
 * Returns formatting structure for a widget.
 */
{
    xtb_fmt *ret;

    ret = (xtb_fmt *) Malloc((unsigned) sizeof(xtb_fmt));
    ret->wid.type = W_TYPE;
    ret->wid.w = w;
    return ret;
}

VARARGS(xtb_hort, xtb_fmt *, (xtb_just just, int padding, int interspace,...))
/*
 * Builds a horizontal structure
 */
{
    va_list ap;
    xtb_fmt *ret,
           *val;

#ifdef __STDC__
    va_start(ap, interspace);
#else
    xtb_just just;
    int     padding,
            interspace;

    va_start(ap);
    just = va_arg(ap, xtb_just);
    padding = va_arg(ap, int);
    interspace = va_arg(ap, int);
#endif
    ret = (xtb_fmt *) Malloc((unsigned) sizeof(xtb_fmt));
    ret->align.type = A_TYPE;
    ret->align.dir = HORIZONTAL;
    ret->align.just = just;
    ret->align.padding = padding;
    ret->align.interspace = interspace;
    /* Build array of incoming xtb_fmt structures */
    ret->align.ni = 0;
    while ((val = va_arg(ap, xtb_fmt *)) != (xtb_fmt *) 0) {
	if (ret->align.ni < MAX_BRANCH) {
	    ret->align.items[ret->align.ni] = val;
	    ret->align.ni++;
	}
	else {
	    ERROR("too many branches\n");
	}
    }
    return ret;
}


VARARGS(xtb_vert, xtb_fmt *, (xtb_just just, int padding, int interspace,...))
/*
 * Builds a vertical structure
 */
{
    va_list ap;
    xtb_fmt *ret,
           *val;

#ifdef __STDC__
    va_start(ap, interspace);
#else
    xtb_just just;
    int     padding,
            interspace;

    va_start(ap);
    just = va_arg(ap, xtb_just);
    padding = va_arg(ap, int);
    interspace = va_arg(ap, int);
#endif
    ret = (xtb_fmt *) Malloc((unsigned) sizeof(xtb_fmt));
    ret->align.type = A_TYPE;
    ret->align.dir = VERTICAL;
    ret->align.just = just;
    ret->align.padding = padding;
    ret->align.interspace = interspace;
    /* Build array of incoming xtb_fmt structures */
    ret->align.ni = 0;
    while ((val = va_arg(ap, xtb_fmt *)) != (xtb_fmt *) 0) {
	if (ret->align.ni < MAX_BRANCH) {
	    ret->align.items[ret->align.ni] = val;
	    ret->align.ni++;
	}
	else {
	    ERROR("too many branches\n");
	}
    }
    return ret;
}


static void
xtb_fmt_setpos(def, x, y)
xtb_fmt *def;
int     x,
        y;

/*
 * Sets all position fields of widgets in `def' to x,y.
 */
{
    int     i;

    switch (def->type) {
    case W_TYPE:
	def->wid.w->x_loc = x;
	def->wid.w->y_loc = y;
	break;
    case A_TYPE:
	for (i = 0; i < def->align.ni; i++) {
	    xtb_fmt_setpos(def->align.items[i], x, y);
	}
	break;
    default:
	ERROR("bad type");
    }
}


static void
xtb_fmt_addpos(def, x, y)
xtb_fmt *def;
int     x,
        y;

/*
 * Adds the offset specified to all position fields of widgets in `def'.
 */
{
    int     i;

    switch (def->type) {
    case W_TYPE:
	def->wid.w->x_loc += x;
	def->wid.w->y_loc += y;
	break;
    case A_TYPE:
	for (i = 0; i < def->align.ni; i++) {
	    xtb_fmt_addpos(def->align.items[i], x, y);
	}
	break;
    default:
	ERROR("bad type");
    }
}

static void
xtb_fmt_hort(nd, defs, widths, heights, just, pad, inter, rw, rh)
int     nd;			/* Number of children     */
xtb_fmt *defs[];		/* Definitions themselves */
unsigned int     widths[];		/* Widths of children     */
unsigned int     heights[];		/* Heights of children    */
xtb_just just;			/* Justification          */
int     pad,
        inter;			/* Padding and interspace */
unsigned int    *rw,
       *rh;			/* Returned size          */

/*
 * Formats items horizontally subject to the widths and heights
 * of the items passed.
 */
{
    int     i;
    int     max_height = 0;
    int     tot_width = 0;
    int     xspot;

    /* Find parameters */
    for (i = 0; i < nd; i++) {
	if (heights[i] > max_height)
	    max_height = heights[i];
	tot_width += widths[i];
    }
    /* Place items -- assumes center justification */
    xspot = pad;
    for (i = 0; i < nd; i++) {
	switch (just) {
	case XTB_TOP:
	    xtb_fmt_addpos(defs[i], xspot, pad);
	    break;
	case XTB_BOTTOM:
	    xtb_fmt_addpos(defs[i], xspot, max_height - heights[i] + pad);
	    break;
	case XTB_CENTER:
	default:
	    /* Everyone else center */
	    xtb_fmt_addpos(defs[i], xspot, (max_height - heights[i]) / 2 + pad);
	    break;
	}
	xspot += (widths[i] + inter);
    }
    /* Figure out resulting size */
    *rw = tot_width + (nd - 1) * inter + (2 * pad);
    *rh = max_height + (2 * pad);
}


static void
xtb_fmt_vert(nd, defs, widths, heights, just, pad, inter, rw, rh)
int     nd;			/* Number of children     */
xtb_fmt *defs[];		/* Definitions themselves */
unsigned int     widths[];		/* Widths of children     */
unsigned int     heights[];		/* Heights of children    */
xtb_just just;			/* Justification          */
int     pad,
        inter;			/* Padding and interspace */
unsigned int    *rw,
       *rh;			/* Returned size          */

/*
 * Formats items vertically subject to the widths and heights
 * of the items passed.
 */
{
    int     i;
    int     max_width = 0;
    int     tot_height = 0;
    int     yspot;

    /* Find parameters */
    for (i = 0; i < nd; i++) {
	if (widths[i] > max_width)
	    max_width = widths[i];
	tot_height += heights[i];
    }
    /* Place items -- assumes center justification */
    yspot = pad;
    for (i = 0; i < nd; i++) {
	switch (just) {
	case XTB_LEFT:
	    xtb_fmt_addpos(defs[i], pad, yspot);
	    break;
	case XTB_RIGHT:
	    xtb_fmt_addpos(defs[i], max_width - widths[i] + pad, yspot);
	    break;
	case XTB_CENTER:
	default:
	    /* Everyone else center */
	    xtb_fmt_addpos(defs[i], (max_width - widths[i]) / 2 + pad, yspot);
	    break;
	}
	yspot += (heights[i] + inter);
    }
    /* Figure out resulting size */
    *rw = max_width + (2 * pad);
    *rh = tot_height + (nd - 1) * inter + (2 * pad);
}

static void
xtb_fmt_top(def, w, h)
xtb_fmt *def;
unsigned *w,
       *h;

/*
 * Recursive portion of formatter
 */
{
    unsigned widths[MAX_BRANCH];
    unsigned heights[MAX_BRANCH];
    int     i;

    switch (def->type) {
    case A_TYPE:
	/* Formatting directive */
	/* place children and determine sizes */
	for (i = 0; i < def->align.ni; i++) {
	    xtb_fmt_top(def->align.items[i], &(widths[i]), &(heights[i]));
	}
	/* now format based on direction */
	switch (def->align.dir) {
	case HORIZONTAL:
	    xtb_fmt_hort(def->align.ni, def->align.items, widths, heights,
			 def->align.just, def->align.padding,
			 def->align.interspace, w, h);
	    break;
	case VERTICAL:
	    xtb_fmt_vert(def->align.ni, def->align.items, widths, heights,
			 def->align.just, def->align.padding,
			 def->align.interspace, w, h);
	    break;
	default:
	    ERROR("bad direction");
	}
	break;
    case W_TYPE:
	/* Simple widget - return size */
	*w = def->wid.w->width;
	*h = def->wid.w->height;
	break;
    default:
	ERROR("bad type");
    }
}

#ifdef DEBUG
static void
xtb_fmt_debug(def)
xtb_fmt *def;

/*
 * Dumps formatting structure for debugging purposes.
 */
{
    int     i;

    switch (def->type) {
    case W_TYPE:
	printf("%d %d %d %d\n",
	       def->wid.w->x_loc, def->wid.w->y_loc,
	       def->wid.w->width, def->wid.w->height);
	break;
    case A_TYPE:
	for (i = 0; i < def->align.ni; i++) {
	    xtb_fmt_debug(def->align.items[i]);
	}
	break;
    default:
	ERROR("bad type");
    }
}

#endif

xtb_fmt *
xtb_fmt_do(def, w, h)
xtb_fmt *def;
unsigned *w,
       *h;

/*
 * Actually does formatting
 */
{
    /* First zero out all positions */
    xtb_fmt_setpos(def, 0, 0);

    /* Now call recursive portion */
    xtb_fmt_top(def, w, h);

#ifdef DEBUG
    xtb_fmt_debug(def);
#endif
    return def;
}

void
xtb_fmt_free(def)
xtb_fmt *def;

/*
 * Frees resources associated with formatting routines
 */
{
    int     i;

    if (def->type == A_TYPE) {
	for (i = 0; i < def->align.ni; i++) {
	    xtb_fmt_free(def->align.items[i]);
	}
    }
    Free((char *) def);
}

void
xtb_mv_frames(nf, frames)
int     nf;			/* Number of frames */
xtb_frame frames[];		/* Array of frames  */

/*
 * Moves frames to the location indicated in the frame
 * structure for each item.
 */
{
    int     i;

    for (i = 0; i < nf; i++) {
	XMoveWindow(t_disp, frames[i].win, frames[i].x_loc, frames[i].y_loc);
    }
}