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
|
<!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"/>
<title>Qwt User's Guide: QwtTextEngine Class Reference</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.7.3 -->
<div id="top">
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">Qwt User's Guide <span id="projectnumber">5.2.2</span></div>
</td>
</tr>
</tbody>
</table>
</div>
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="pages.html"><span>Related Pages</span></a></li>
<li class="current"><a href="annotated.html"><span>Classes</span></a></li>
<li><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
<div id="navrow2" class="tabs2">
<ul class="tablist">
<li><a href="annotated.html"><span>Class List</span></a></li>
<li><a href="classes.html"><span>Class Index</span></a></li>
<li><a href="inherits.html"><span>Class Hierarchy</span></a></li>
<li><a href="functions.html"><span>Class Members</span></a></li>
</ul>
</div>
</div>
<div class="header">
<div class="summary">
<a href="#pub-methods">Public Member Functions</a> |
<a href="#pro-methods">Protected Member Functions</a> </div>
<div class="headertitle">
<h1>QwtTextEngine Class Reference</h1> </div>
</div>
<div class="contents">
<!-- doxytag: class="QwtTextEngine" -->
<p>Abstract base class for rendering text strings.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="qwt__text__engine_8h_source.html">qwt_text_engine.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for QwtTextEngine:</div>
<div class="dyncontent">
<div class="center"><img src="class_qwt_text_engine__inherit__graph.png" border="0" usemap="#_qwt_text_engine_inherit__map" alt="Inheritance graph"/></div>
<map name="_qwt_text_engine_inherit__map" id="_qwt_text_engine_inherit__map">
<area shape="rect" id="node3" href="class_qwt_math_m_l_text_engine.html" title="Text Engine for the MathML renderer of the Qt solutions package." alt="" coords="5,86,160,117"/><area shape="rect" id="node5" href="class_qwt_plain_text_engine.html" title="A text engine for plain texts." alt="" coords="184,86,323,117"/><area shape="rect" id="node7" href="class_qwt_rich_text_engine.html" title="A text engine for Qt rich texts." alt="" coords="347,86,480,117"/></map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="class_qwt_text_engine-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_text_engine.html#acf750dd01aa35f5c9fc836460c30d663">draw</a> (QPainter *painter, const QRect &rect, int flags, const QString &text) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_text_engine.html#aac1112e5b1005d020d596dd174bbabf6">heightForWidth</a> (const QFont &font, int flags, const QString &text, int width) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_text_engine.html#a98316f2f6f4f50216ceffbe9babe2901">mightRender</a> (const QString &text) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_text_engine.html#ad84ebda640e65f23ebd758cd545a5b9a">textMargins</a> (const QFont &font, const QString &text, int &left, int &right, int &top, int &bottom) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual QSize </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_text_engine.html#a73214e1778edf6eb870fc96bf9c5091e">textSize</a> (const QFont &font, int flags, const QString &text) const =0</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_text_engine.html#adda9e23494429c54b3cc3452940fb2bc">~QwtTextEngine</a> ()</td></tr>
<tr><td colspan="2"><h2><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="class_qwt_text_engine.html#a97c5ef76ee920ab0f19e178e85017d9d">QwtTextEngine</a> ()</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Abstract base class for rendering text strings. </p>
<p>A text engine is responsible for rendering texts for a specific text format. They are used by <a class="el" href="class_qwt_text.html" title="A class representing a text.">QwtText</a> to render a text.</p>
<p><a class="el" href="class_qwt_plain_text_engine.html" title="A text engine for plain texts.">QwtPlainTextEngine</a> and <a class="el" href="class_qwt_rich_text_engine.html" title="A text engine for Qt rich texts.">QwtRichTextEngine</a> are part of the Qwt library.</p>
<p><a class="el" href="class_qwt_math_m_l_text_engine.html" title="Text Engine for the MathML renderer of the Qt solutions package.">QwtMathMLTextEngine</a> can be found in Qwt MathML extension, that needs the MathML renderer of the Qt solutions package. Unfortunately it is only available with a commercial Qt license.</p>
<dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="class_qwt_text.html#aef6a1e71b1feba3116ce69f6c9de70ad">QwtText::setTextEngine()</a> </dd></dl>
</div><hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="adda9e23494429c54b3cc3452940fb2bc"></a><!-- doxytag: member="QwtTextEngine::~QwtTextEngine" ref="adda9e23494429c54b3cc3452940fb2bc" args="()" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">QwtTextEngine::~QwtTextEngine </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Destructor. </p>
</div>
</div>
<a class="anchor" id="a97c5ef76ee920ab0f19e178e85017d9d"></a><!-- doxytag: member="QwtTextEngine::QwtTextEngine" ref="a97c5ef76ee920ab0f19e178e85017d9d" args="()" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">QwtTextEngine::QwtTextEngine </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [protected]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Constructor. </p>
</div>
</div>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="acf750dd01aa35f5c9fc836460c30d663"></a><!-- doxytag: member="QwtTextEngine::draw" ref="acf750dd01aa35f5c9fc836460c30d663" args="(QPainter *painter, const QRect &rect, int flags, const QString &text) const =0" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">virtual void QwtTextEngine::draw </td>
<td>(</td>
<td class="paramtype">QPainter * </td>
<td class="paramname"><em>painter</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const QRect & </td>
<td class="paramname"><em>rect</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>flags</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const QString & </td>
<td class="paramname"><em>text</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const<code> [pure virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Draw the text in a clipping rectangle</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">painter</td><td>Painter </td></tr>
<tr><td class="paramname">rect</td><td>Clipping rectangle </td></tr>
<tr><td class="paramname">flags</td><td>Bitwise OR of the flags like in for QPainter::drawText </td></tr>
<tr><td class="paramname">text</td><td>Text to be rendered </td></tr>
</table>
</dd>
</dl>
<p>Implemented in <a class="el" href="class_qwt_plain_text_engine.html#ad953f35830710b9527ca61d931a3debc">QwtPlainTextEngine</a>, <a class="el" href="class_qwt_rich_text_engine.html#a3b22116710e9095a95e2739e84623725">QwtRichTextEngine</a>, and <a class="el" href="class_qwt_math_m_l_text_engine.html#a476c19642bf2c69a1abf0021547a1d7e">QwtMathMLTextEngine</a>.</p>
</div>
</div>
<a class="anchor" id="aac1112e5b1005d020d596dd174bbabf6"></a><!-- doxytag: member="QwtTextEngine::heightForWidth" ref="aac1112e5b1005d020d596dd174bbabf6" args="(const QFont &font, int flags, const QString &text, int width) const =0" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">virtual int QwtTextEngine::heightForWidth </td>
<td>(</td>
<td class="paramtype">const QFont & </td>
<td class="paramname"><em>font</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>flags</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const QString & </td>
<td class="paramname"><em>text</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>width</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const<code> [pure virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Find the height for a given width</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">font</td><td>Font of the text </td></tr>
<tr><td class="paramname">flags</td><td>Bitwise OR of the flags used like in QPainter::drawText </td></tr>
<tr><td class="paramname">text</td><td>Text to be rendered </td></tr>
<tr><td class="paramname">width</td><td>Width</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Calculated height </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_plain_text_engine.html#a167f419dc7a3a172b59f78c9f480fd0d">QwtPlainTextEngine</a>, <a class="el" href="class_qwt_rich_text_engine.html#aff5b59b422c64eb30230b767675b0b79">QwtRichTextEngine</a>, and <a class="el" href="class_qwt_math_m_l_text_engine.html#a2af5e9efb10eee9c28cce50699cdfdab">QwtMathMLTextEngine</a>.</p>
</div>
</div>
<a class="anchor" id="a98316f2f6f4f50216ceffbe9babe2901"></a><!-- doxytag: member="QwtTextEngine::mightRender" ref="a98316f2f6f4f50216ceffbe9babe2901" args="(const QString &text) const =0" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">virtual bool QwtTextEngine::mightRender </td>
<td>(</td>
<td class="paramtype">const QString & </td>
<td class="paramname"><em>text</em></td><td>)</td>
<td> const<code> [pure virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Test if a string can be rendered by this text engine</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">text</td><td>Text to be tested </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>true, if it can be rendered </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_plain_text_engine.html#ae7bd7417f0173e2d35fe1bf7a514ec9b">QwtPlainTextEngine</a>, <a class="el" href="class_qwt_rich_text_engine.html#a42da46eee5fbda55e34b18c64b0b5e0b">QwtRichTextEngine</a>, and <a class="el" href="class_qwt_math_m_l_text_engine.html#a59ca5842c32fd12cfd2aeeef5c985600">QwtMathMLTextEngine</a>.</p>
</div>
</div>
<a class="anchor" id="ad84ebda640e65f23ebd758cd545a5b9a"></a><!-- doxytag: member="QwtTextEngine::textMargins" ref="ad84ebda640e65f23ebd758cd545a5b9a" args="(const QFont &font, const QString &text, int &left, int &right, int &top, int &bottom) const =0" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">virtual void QwtTextEngine::textMargins </td>
<td>(</td>
<td class="paramtype">const QFont & </td>
<td class="paramname"><em>font</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const QString & </td>
<td class="paramname"><em>text</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int & </td>
<td class="paramname"><em>left</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int & </td>
<td class="paramname"><em>right</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int & </td>
<td class="paramname"><em>top</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int & </td>
<td class="paramname"><em>bottom</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const<code> [pure virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Return margins around the texts</p>
<p>The textSize might include margins around the text, like QFontMetrics::descent. In situations where texts need to be aligend in detail, knowing these margins might improve the layout calculations.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">font</td><td>Font of the text </td></tr>
<tr><td class="paramname">text</td><td>Text to be rendered </td></tr>
<tr><td class="paramname">left</td><td>Return value for the left margin </td></tr>
<tr><td class="paramname">right</td><td>Return value for the right margin </td></tr>
<tr><td class="paramname">top</td><td>Return value for the top margin </td></tr>
<tr><td class="paramname">bottom</td><td>Return value for the bottom margin </td></tr>
</table>
</dd>
</dl>
<p>Implemented in <a class="el" href="class_qwt_plain_text_engine.html#ad14b14ba0f38576c7d562e5c5d70d8f3">QwtPlainTextEngine</a>, <a class="el" href="class_qwt_rich_text_engine.html#a675bb28d8526fbcdbecc1833edffb980">QwtRichTextEngine</a>, and <a class="el" href="class_qwt_math_m_l_text_engine.html#a21ae25c70e4ff79cde60072e4bd75a29">QwtMathMLTextEngine</a>.</p>
</div>
</div>
<a class="anchor" id="a73214e1778edf6eb870fc96bf9c5091e"></a><!-- doxytag: member="QwtTextEngine::textSize" ref="a73214e1778edf6eb870fc96bf9c5091e" args="(const QFont &font, int flags, const QString &text) const =0" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">virtual QSize QwtTextEngine::textSize </td>
<td>(</td>
<td class="paramtype">const QFont & </td>
<td class="paramname"><em>font</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>flags</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const QString & </td>
<td class="paramname"><em>text</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td> const<code> [pure virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Returns the size, that is needed to render text</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">font</td><td>Font of the text </td></tr>
<tr><td class="paramname">flags</td><td>Bitwise OR of the flags like in for QPainter::drawText </td></tr>
<tr><td class="paramname">text</td><td>Text to be rendered</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Caluclated size </dd></dl>
<p>Implemented in <a class="el" href="class_qwt_plain_text_engine.html#a3d6bd4659b061733ddfd9b3915077b75">QwtPlainTextEngine</a>, <a class="el" href="class_qwt_rich_text_engine.html#af6232e54a4991dcee4a7b3c783163537">QwtRichTextEngine</a>, and <a class="el" href="class_qwt_math_m_l_text_engine.html#aecb16b442a1ff15418dc31860e11c27b">QwtMathMLTextEngine</a>.</p>
</div>
</div>
</div>
<hr class="footer"/><address class="footer"><small>Generated by 
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.3 </small></address>
</body>
</html>
|
