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
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.14"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>Qwt User's Guide: QwtColorMap Class Reference</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtreedata.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(document).ready(initResizable);
/* @license-end */</script>
<link href="search/search.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="search/searchdata.js"></script>
<script type="text/javascript" src="search/search.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td id="projectalign" style="padding-left: 0.5em;">
<div id="projectname">Qwt User's Guide
 <span id="projectnumber">6.1.4</span>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.14 -->
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
var searchBox = new SearchBox("searchBox", "search",false,'Search');
/* @license-end */
</script>
<script type="text/javascript" src="menudata.js"></script>
<script type="text/javascript" src="menu.js"></script>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(function() {
initMenu('',true,false,'search.php','Search');
$(document).ready(function() { init_search(); });
});
/* @license-end */</script>
<div id="main-nav"></div>
</div><!-- top -->
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
<div id="nav-sync" class="sync"></div>
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
$(document).ready(function(){initNavTree('class_qwt_color_map.html','');});
/* @license-end */
</script>
<div id="doc-content">
<!-- window showing the filter options -->
<div id="MSearchSelectWindow"
onmouseover="return searchBox.OnSearchSelectShow()"
onmouseout="return searchBox.OnSearchSelectHide()"
onkeydown="return searchBox.OnSearchSelectKey(event)">
</div>
<!-- iframe showing the search results (closed by default) -->
<div id="MSearchResultsWindow">
<iframe src="javascript:void(0)" frameborder="0"
name="MSearchResults" id="MSearchResults">
</iframe>
</div>
<div class="header">
<div class="summary">
<a href="#pub-types">Public Types</a> |
<a href="#pub-methods">Public Member Functions</a> |
<a href="class_qwt_color_map-members.html">List of all members</a> </div>
<div class="headertitle">
<div class="title">QwtColorMap Class Reference<span class="mlabels"><span class="mlabel">abstract</span></span></div> </div>
</div><!--header-->
<div class="contents">
<p><a class="el" href="class_qwt_color_map.html" title="QwtColorMap is used to map values into colors. ">QwtColorMap</a> is used to map values into colors.
<a href="class_qwt_color_map.html#details">More...</a></p>
<p><code>#include <<a class="el" href="qwt__color__map_8h_source.html">qwt_color_map.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for QwtColorMap:</div>
<div class="dyncontent">
<div class="center"><img src="class_qwt_color_map__inherit__graph.png" border="0" usemap="#_qwt_color_map_inherit__map" alt="Inheritance graph"/></div>
<map name="_qwt_color_map_inherit__map" id="_qwt_color_map_inherit__map">
<area shape="rect" id="node2" href="class_qwt_alpha_color_map.html" title="QwtAlphaColorMap varies the alpha value of a color. " alt="" coords="5,80,144,107"/>
<area shape="rect" id="node3" href="class_qwt_linear_color_map.html" title="QwtLinearColorMap builds a color map from color stops. " alt="" coords="168,80,309,107"/>
</map>
<center><span class="legend">[<a target="top" href="graph_legend.html">legend</a>]</span></center></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:a9e5570790910fa3894887bca7dc5a670"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_color_map.html#a9e5570790910fa3894887bca7dc5a670">Format</a> { <a class="el" href="class_qwt_color_map.html#a9e5570790910fa3894887bca7dc5a670a663473fd836d9a84fe48ae1755de326a">RGB</a>,
<a class="el" href="class_qwt_color_map.html#a9e5570790910fa3894887bca7dc5a670a304cb055c004223ca77f1a4cbbf27ea2">Indexed</a>
}</td></tr>
<tr class="separator:a9e5570790910fa3894887bca7dc5a670"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a2ab0a6041ea6d37c0609ca2e3bd976ca"><td class="memItemLeft" align="right" valign="top"><a id="a2ab0a6041ea6d37c0609ca2e3bd976ca"></a>
 </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_color_map.html#a2ab0a6041ea6d37c0609ca2e3bd976ca">QwtColorMap</a> (<a class="el" href="class_qwt_color_map.html#a9e5570790910fa3894887bca7dc5a670">Format</a>=<a class="el" href="class_qwt_color_map.html#a9e5570790910fa3894887bca7dc5a670a663473fd836d9a84fe48ae1755de326a">QwtColorMap::RGB</a>)</td></tr>
<tr class="memdesc:a2ab0a6041ea6d37c0609ca2e3bd976ca"><td class="mdescLeft"> </td><td class="mdescRight">Constructor. <br /></td></tr>
<tr class="separator:a2ab0a6041ea6d37c0609ca2e3bd976ca"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af20e4ffdb3c5d34f5a6dc301bcbb9f7e"><td class="memItemLeft" align="right" valign="top"><a id="af20e4ffdb3c5d34f5a6dc301bcbb9f7e"></a>
virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_color_map.html#af20e4ffdb3c5d34f5a6dc301bcbb9f7e">~QwtColorMap</a> ()</td></tr>
<tr class="memdesc:af20e4ffdb3c5d34f5a6dc301bcbb9f7e"><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <br /></td></tr>
<tr class="separator:af20e4ffdb3c5d34f5a6dc301bcbb9f7e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6a7defcce42e779c1596e277c78986c2"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_qwt_color_map.html#a9e5570790910fa3894887bca7dc5a670">Format</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_color_map.html#a6a7defcce42e779c1596e277c78986c2">format</a> () const</td></tr>
<tr class="separator:a6a7defcce42e779c1596e277c78986c2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aaed0bb47b6379696c588732348438136"><td class="memItemLeft" align="right" valign="top">virtual QRgb </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_color_map.html#aaed0bb47b6379696c588732348438136">rgb</a> (const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &interval, double value) const =0</td></tr>
<tr class="separator:aaed0bb47b6379696c588732348438136"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a762baa2edca8773ec09e0c1c5df2cf04"><td class="memItemLeft" align="right" valign="top">virtual unsigned char </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_color_map.html#a762baa2edca8773ec09e0c1c5df2cf04">colorIndex</a> (const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &interval, double value) const =0</td></tr>
<tr class="separator:a762baa2edca8773ec09e0c1c5df2cf04"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7ef0ebd270a05712715bfdfbe59f35d5"><td class="memItemLeft" align="right" valign="top">QColor </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_color_map.html#a7ef0ebd270a05712715bfdfbe59f35d5">color</a> (const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &, double value) const</td></tr>
<tr class="separator:a7ef0ebd270a05712715bfdfbe59f35d5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2e41c503838aea8ed617958aa9b9e5bf"><td class="memItemLeft" align="right" valign="top">virtual QVector< QRgb > </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_color_map.html#a2e41c503838aea8ed617958aa9b9e5bf">colorTable</a> (const <a class="el" href="class_qwt_interval.html">QwtInterval</a> &) const</td></tr>
<tr class="separator:a2e41c503838aea8ed617958aa9b9e5bf"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p><a class="el" href="class_qwt_color_map.html" title="QwtColorMap is used to map values into colors. ">QwtColorMap</a> is used to map values into colors. </p>
<p>For displaying 3D data on a 2D plane the 3rd dimension is often displayed using colors, like f.e in a spectrogram.</p>
<p>Each color map is optimized to return colors for only one of the following image formats:</p>
<ul>
<li>QImage::Format_Indexed8<br />
</li>
<li>QImage::Format_ARGB32<br />
<dl class="section see"><dt>See also</dt><dd><a class="el" href="class_qwt_plot_spectrogram.html" title="A plot item, which displays a spectrogram. ">QwtPlotSpectrogram</a>, <a class="el" href="class_qwt_scale_widget.html" title="A Widget which contains a scale. ">QwtScaleWidget</a> </dd></dl>
</li>
</ul>
</div><h2 class="groupheader">Member Enumeration Documentation</h2>
<a id="a9e5570790910fa3894887bca7dc5a670"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a9e5570790910fa3894887bca7dc5a670">◆ </a></span>Format</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">enum <a class="el" href="class_qwt_color_map.html#a9e5570790910fa3894887bca7dc5a670">QwtColorMap::Format</a></td>
</tr>
</table>
</div><div class="memdoc">
<p>Format for color mapping </p><dl class="section see"><dt>See also</dt><dd><a class="el" href="class_qwt_color_map.html#aaed0bb47b6379696c588732348438136">rgb()</a>, <a class="el" href="class_qwt_color_map.html#a762baa2edca8773ec09e0c1c5df2cf04">colorIndex()</a>, <a class="el" href="class_qwt_color_map.html#a2e41c503838aea8ed617958aa9b9e5bf">colorTable()</a> </dd></dl>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="a9e5570790910fa3894887bca7dc5a670a663473fd836d9a84fe48ae1755de326a"></a>RGB </td><td class="fielddoc"><p>The map is intended to map into RGB values. </p>
</td></tr>
<tr><td class="fieldname"><a id="a9e5570790910fa3894887bca7dc5a670a304cb055c004223ca77f1a4cbbf27ea2"></a>Indexed </td><td class="fielddoc"><p>The map is intended to map into 8 bit values, that are indices into the color table. </p>
</td></tr>
</table>
</div>
</div>
<h2 class="groupheader">Member Function Documentation</h2>
<a id="a7ef0ebd270a05712715bfdfbe59f35d5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7ef0ebd270a05712715bfdfbe59f35d5">◆ </a></span>color()</h2>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">QColor QwtColorMap::color </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & </td>
<td class="paramname"><em>interval</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>value</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Map a value into a color</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">interval</td><td>Valid interval for values </td></tr>
<tr><td class="paramname">value</td><td>Value</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Color corresponding to value</dd></dl>
<dl class="section warning"><dt>Warning</dt><dd>This method is slow for Indexed color maps. If it is necessary to map many values, its better to get the color table once and find the color using <a class="el" href="class_qwt_color_map.html#a762baa2edca8773ec09e0c1c5df2cf04">colorIndex()</a>. </dd></dl>
</div>
</div>
<a id="a762baa2edca8773ec09e0c1c5df2cf04"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a762baa2edca8773ec09e0c1c5df2cf04">◆ </a></span>colorIndex()</h2>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">virtual unsigned char QwtColorMap::colorIndex </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & </td>
<td class="paramname"><em>interval</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>value</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">pure virtual</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Map a value of a given interval into a color index</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">interval</td><td>Range for the values </td></tr>
<tr><td class="paramname">value</td><td>Value </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>color index, corresponding to value </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_linear_color_map.html#a0daffa17d380dd51b6186f75cf207ec6">QwtLinearColorMap</a>.</p>
</div>
</div>
<a id="a2e41c503838aea8ed617958aa9b9e5bf"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a2e41c503838aea8ed617958aa9b9e5bf">◆ </a></span>colorTable()</h2>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">QVector< QRgb > QwtColorMap::colorTable </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & </td>
<td class="paramname"><em>interval</em></td><td>)</td>
<td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">virtual</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Build and return a color map of 256 colors</p>
<p>The color table is needed for rendering indexed images in combination with using <a class="el" href="class_qwt_color_map.html#a762baa2edca8773ec09e0c1c5df2cf04">colorIndex()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">interval</td><td>Range for the values </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>A color table, that can be used for a QImage </dd></dl>
</div>
</div>
<a id="a6a7defcce42e779c1596e277c78986c2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a6a7defcce42e779c1596e277c78986c2">◆ </a></span>format()</h2>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="class_qwt_color_map.html#a9e5570790910fa3894887bca7dc5a670">QwtColorMap::Format</a> QwtColorMap::format </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<dl class="section return"><dt>Returns</dt><dd>Intended format of the color map </dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="class_qwt_color_map.html#a9e5570790910fa3894887bca7dc5a670">Format</a> </dd></dl>
</div>
</div>
<a id="aaed0bb47b6379696c588732348438136"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aaed0bb47b6379696c588732348438136">◆ </a></span>rgb()</h2>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">virtual QRgb QwtColorMap::rgb </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="class_qwt_interval.html">QwtInterval</a> & </td>
<td class="paramname"><em>interval</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"><em>value</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">pure virtual</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Map a value of a given interval into a RGB value.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">interval</td><td>Range for the values </td></tr>
<tr><td class="paramname">value</td><td>Value </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>RGB value, corresponding to value </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_alpha_color_map.html#a15815e2d6637941bc8e806afbb99c170">QwtAlphaColorMap</a>, and <a class="el" href="class_qwt_linear_color_map.html#a2b3a87791791eea4b53a94fafd541f9c">QwtLinearColorMap</a>.</p>
</div>
</div>
</div><!-- contents -->
</div><!-- doc-content -->
<!-- start footer part -->
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
<ul>
<li class="navelem"><a class="el" href="class_qwt_color_map.html">QwtColorMap</a></li>
<li class="footer">Generated by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.14 </li>
</ul>
</div>
</body>
</html>
|
