source: trunk/doc/html/qfd-example.html

Last change on this file was 190, checked in by rudi, 14 years ago

reference documentation added
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1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
2<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/qfd/qfd.doc:4 -->
3<html>
4<head>
5<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
6<title>Font Displayer</title>
7<style type="text/css"><!--
8fn { margin-left: 1cm; text-indent: -1cm; }
9a:link { color: #004faf; text-decoration: none }
10a:visited { color: #672967; text-decoration: none }
11body { background: #ffffff; color: black; }
12--></style>
13</head>
14<body>
15
16<table border="0" cellpadding="0" cellspacing="0" width="100%">
17<tr bgcolor="#E5E5E5">
18<td valign=center>
19 <a href="index.html">
20<font color="#004faf">Home</font></a>
21 | <a href="classes.html">
22<font color="#004faf">All&nbsp;Classes</font></a>
23 | <a href="mainclasses.html">
24<font color="#004faf">Main&nbsp;Classes</font></a>
25 | <a href="annotated.html">
26<font color="#004faf">Annotated</font></a>
27 | <a href="groups.html">
28<font color="#004faf">Grouped&nbsp;Classes</font></a>
29 | <a href="functions.html">
30<font color="#004faf">Functions</font></a>
31</td>
32<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Font Displayer</h1>
33
34
35<p>
36This example program displays all characters of a font.
37<p> <hr>
38<p> Header file:
39<p> <pre>/****************************************************************************
40** $Id: qfd-example.html 2051 2007-02-21 10:04:20Z chehrlic $
41**
42** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
43**
44** This file is part of an example program for Qt. This example
45** program may be used, distributed and modified without limitation.
46**
47*****************************************************************************/
48
49#ifndef FontDisplayer_H
50#define FontDisplayer_H
51
52#include &lt;<a href="qframe-h.html">qframe.h</a>&gt;
53#include &lt;<a href="qmainwindow-h.html">qmainwindow.h</a>&gt;
54
55class QSlider;
56
57class FontRowTable : public <a href="qframe.html">QFrame</a> {
58 <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
59public:
60 FontRowTable( <a href="qwidget.html">QWidget</a>* parent=0, const char* name=0 );
61
62 <a href="qsize.html">QSize</a> sizeHint() const;
63
64signals:
65 void fontInformation(const <a href="qstring.html">QString</a>&amp;);
66
67public slots:
68 void setRow(int);
69 void chooseFont();
70
71
72protected:
73 <a href="qsize.html">QSize</a> cellSize() const;
74 void paintEvent( <a href="qpaintevent.html">QPaintEvent</a>* );
75private:
76 <a href="qfont.html">QFont</a> tablefont;
77 int row;
78};
79
80class FontDisplayer : public <a href="qmainwindow.html">QMainWindow</a> {
81 Q_OBJECT
82public:
83 FontDisplayer( <a href="qwidget.html">QWidget</a>* parent=0, const char* name=0 );
84};
85
86#endif
87</pre>
88
89<p> <hr>
90<p> Implementation:
91<p> <pre>/****************************************************************************
92** $Id: qfd-example.html 2051 2007-02-21 10:04:20Z chehrlic $
93**
94** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
95**
96** This file is part of an example program for Qt. This example
97** program may be used, distributed and modified without limitation.
98**
99*****************************************************************************/
100
101#include "fontdisplayer.h"
102#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
103#include &lt;<a href="qslider-h.html">qslider.h</a>&gt;
104#include &lt;<a href="qspinbox-h.html">qspinbox.h</a>&gt;
105#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;
106#include &lt;<a href="qtoolbar-h.html">qtoolbar.h</a>&gt;
107#include &lt;<a href="qstatusbar-h.html">qstatusbar.h</a>&gt;
108#include &lt;<a href="qlabel-h.html">qlabel.h</a>&gt;
109#include &lt;<a href="qpushbutton-h.html">qpushbutton.h</a>&gt;
110#include &lt;<a href="qfontdialog-h.html">qfontdialog.h</a>&gt;
111#include &lt;stdlib.h&gt;
112
113
114<a name="f531"></a>FontRowTable::FontRowTable( <a href="qwidget.html">QWidget</a>* parent, const char* name ) :
115 <a href="qframe.html">QFrame</a>(parent,name)
116{
117 <a href="qwidget.html#setBackgroundMode">setBackgroundMode</a>(PaletteBase);
118 <a href="qframe.html#setFrameStyle">setFrameStyle</a>(Panel|Sunken);
119 <a href="qframe.html#setMargin">setMargin</a>(8);
120 setRow(0);
121<a name="x1979"></a> tablefont = QApplication::<a href="qapplication.html#font">font</a>();
122}
123
124<a name="x1996"></a>QSize FontRowTable::<a href="qwidget.html#sizeHint">sizeHint</a>() const
125{
126 return 24*cellSize()+QSize(2,2)*(<a href="qframe.html#margin">margin</a>()+frameWidth());
127}
128
129QSize <a name="f532"></a>FontRowTable::cellSize() const
130{
131 <a href="qfontmetrics.html">QFontMetrics</a> fm = <a href="qwidget.html#fontMetrics">fontMetrics</a>();
132<a name="x1990"></a><a name="x1989"></a> return QSize( fm.<a href="qfontmetrics.html#maxWidth">maxWidth</a>(), fm.<a href="qfontmetrics.html#lineSpacing">lineSpacing</a>()+1 );
133}
134
135<a name="x1995"></a>void FontRowTable::<a href="qframe.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a>* e )
136{
137 QFrame::<a href="qframe.html#paintEvent">paintEvent</a>(e);
138 <a href="qpainter.html">QPainter</a> p(this);
139<a name="x2002"></a><a name="x1999"></a> p.<a href="qpainter.html#setClipRegion">setClipRegion</a>(e-&gt;<a href="qpaintevent.html#region">region</a>());
140<a name="x2001"></a> <a href="qrect.html">QRect</a> r = e-&gt;<a href="qpaintevent.html#rect">rect</a>();
141 <a href="qfontmetrics.html">QFontMetrics</a> fm = <a href="qwidget.html#fontMetrics">fontMetrics</a>();
142<a name="x1991"></a> int ml = <a href="qframe.html#frameWidth">frameWidth</a>()+margin() + 1 + QMAX(0,-fm.<a href="qfontmetrics.html#minLeftBearing">minLeftBearing</a>());
143 int mt = <a href="qframe.html#frameWidth">frameWidth</a>()+margin();
144 <a href="qsize.html">QSize</a> cell((<a href="qwidget.html#width">width</a>()-15-ml)/16,(<a href="qwidget.html#height">height</a>()-15-mt)/16);
145
146<a name="x2008"></a><a name="x2007"></a> if ( !cell.<a href="qsize.html#width">width</a>() || !cell.<a href="qsize.html#height">height</a>() )
147 return;
148
149 int mini = r.<a href="qrect.html#left">left</a>() / cell.<a href="qsize.html#width">width</a>();
150 int maxi = (r.<a href="qrect.html#right">right</a>()+cell.<a href="qsize.html#width">width</a>()-1) / cell.<a href="qsize.html#width">width</a>();
151 int minj = r.<a href="qrect.html#top">top</a>() / cell.<a href="qsize.html#height">height</a>();
152<a name="x2003"></a> int maxj = (r.<a href="qrect.html#bottom">bottom</a>()+cell.<a href="qsize.html#height">height</a>()-1) / cell.<a href="qsize.html#height">height</a>();
153
154<a name="x1986"></a> int h = fm.<a href="qfontmetrics.html#height">height</a>();
155
156 <a href="qcolor.html">QColor</a> body(255,255,192);
157 <a href="qcolor.html">QColor</a> negative(255,192,192);
158 <a href="qcolor.html">QColor</a> positive(192,192,255);
159 <a href="qcolor.html">QColor</a> rnegative(255,128,128);
160 <a href="qcolor.html">QColor</a> rpositive(128,128,255);
161
162 for (int j = minj; j&lt;=maxj; j++) {
163 for (int i = mini; i&lt;=maxi; i++) {
164 if ( i &lt; 16 &amp;&amp; j &lt; 16 ) {
165 int x = i*cell.<a href="qsize.html#width">width</a>();
166 int y = j*cell.<a href="qsize.html#height">height</a>();
167
168 <a href="qchar.html">QChar</a> ch = QChar(j*16+i,row);
169
170<a name="x1987"></a> if ( fm.<a href="qfontmetrics.html#inFont">inFont</a>(ch) ) {
171<a name="x1994"></a> int w = fm.<a href="qfontmetrics.html#width">width</a>(ch);
172<a name="x1988"></a> int l = fm.<a href="qfontmetrics.html#leftBearing">leftBearing</a>(ch);
173<a name="x1993"></a> int r = fm.<a href="qfontmetrics.html#rightBearing">rightBearing</a>(ch);
174
175 x += ml;
176 y += mt+h;
177
178<a name="x1998"></a> p.<a href="qpainter.html#fillRect">fillRect</a>(x,y,w,-h,body);
179 if ( w ) {
180 if ( l ) {
181 p.<a href="qpainter.html#fillRect">fillRect</a>(x+(l&gt;0?0:l), y-h/2, abs(l),-h/2,
182 l &lt; 0 ? negative : positive);
183 }
184 if ( r ) {
185 p.<a href="qpainter.html#fillRect">fillRect</a>(x+w-(r&gt;0?r:0),y+2, abs(r),-h/2,
186 r &lt; 0 ? rnegative : rpositive);
187 }
188 }
189 <a href="qstring.html">QString</a> s;
190 s += ch;
191 p.<a href="qpainter.html#setPen">setPen</a>(QPen(Qt::black));
192 p.<a href="qpainter.html#drawText">drawText</a>(x,y,s);
193 }
194 }
195 }
196 }
197}
198
199void <a name="f533"></a>FontRowTable::setRow(int r)
200{
201 row = r;
202
203 <a href="qfontmetrics.html">QFontMetrics</a> fm = <a href="qwidget.html#fontMetrics">fontMetrics</a>();
204 <a href="qfontinfo.html">QFontInfo</a> fi = <a href="qwidget.html#fontInfo">fontInfo</a>();
205 <a href="qstring.html">QString</a> str = QString("%1 %2pt%3%4 mLB=%5 mRB=%6 mW=%7")
206<a name="x1983"></a> .arg(fi.<a href="qfontinfo.html#family">family</a>())
207<a name="x1985"></a> .arg(fi.<a href="qfontinfo.html#pointSize">pointSize</a>())
208<a name="x1982"></a> .arg(fi.<a href="qfontinfo.html#bold">bold</a>() ? " bold" : "")
209<a name="x1984"></a> .arg(fi.<a href="qfontinfo.html#italic">italic</a>() ? " italic" : "")
210 .arg(fm.<a href="qfontmetrics.html#minLeftBearing">minLeftBearing</a>())
211<a name="x1992"></a> .arg(fm.<a href="qfontmetrics.html#minRightBearing">minRightBearing</a>())
212 .arg(fm.<a href="qfontmetrics.html#maxWidth">maxWidth</a>());
213
214 emit fontInformation(str);
215 <a href="qwidget.html#update">update</a>();
216}
217
218void <a name="f534"></a>FontRowTable::chooseFont()
219{
220 bool ok;
221 <a href="qfont.html">QFont</a> oldfont = tablefont;
222<a name="x1981"></a> tablefont = QFontDialog::<a href="qfontdialog.html#getFont">getFont</a>(&amp;ok, oldfont, this);
223
224 if (ok)
225 <a href="qwidget.html#setFont">setFont</a>(tablefont);
226 else
227 tablefont = oldfont;
228}
229
230<a name="f530"></a>FontDisplayer::FontDisplayer( <a href="qwidget.html">QWidget</a>* parent, const char* name ) :
231 <a href="qmainwindow.html">QMainWindow</a>(parent,name)
232{
233 FontRowTable* table = new FontRowTable(this);
234 <a href="qtoolbar.html">QToolBar</a>* controls = new <a href="qtoolbar.html">QToolBar</a>(this);
235 (void) new <a href="qlabel.html">QLabel</a>(<a href="qobject.html#tr">tr</a>("Row:"), controls);
236 <a href="qspinbox.html">QSpinBox</a> *row = new <a href="qspinbox.html">QSpinBox</a>(0,255,1,controls);
237<a name="x2010"></a> controls-&gt;<a href="qtoolbar.html#addSeparator">addSeparator</a>();
238 <a href="qpushbutton.html">QPushButton</a> *fontbutton = new <a href="qpushbutton.html">QPushButton</a>(<a href="qobject.html#tr">tr</a>("Font..."), controls);
239
240<a name="x2009"></a> <a href="qobject.html#connect">connect</a>(row,SIGNAL(<a href="qspinbox.html#valueChanged">valueChanged</a>(int)),table,SLOT(setRow(int)));
241 <a href="qobject.html#connect">connect</a>(fontbutton, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), table, SLOT(chooseFont()));
242 <a href="qobject.html#connect">connect</a>(table,SIGNAL(fontInformation(const <a href="qstring.html">QString</a>&amp;)),
243 <a href="qmainwindow.html#statusBar">statusBar</a>(),SLOT(message(const <a href="qstring.html">QString</a>&amp;)));
244 table-&gt;setRow(0);
245 <a href="qmainwindow.html#setCentralWidget">setCentralWidget</a>(table);
246}
247</pre>
248
249<p> <hr>
250<p> Main:
251<p> <pre>/****************************************************************************
252** $Id: qfd-example.html 2051 2007-02-21 10:04:20Z chehrlic $
253**
254** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
255**
256** This file is part of an example program for Qt. This example
257** program may be used, distributed and modified without limitation.
258**
259*****************************************************************************/
260
261#include "fontdisplayer.h"
262
263#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
264#include &lt;<a href="qslider-h.html">qslider.h</a>&gt;
265#include &lt;<a href="qpainter-h.html">qpainter.h</a>&gt;
266#include &lt;<a href="qstatusbar-h.html">qstatusbar.h</a>&gt;
267
268
269
270int main(int argc, char** argv)
271{
272 <a href="qapplication.html">QApplication</a> app(argc,argv);
273
274 FontDisplayer m;
275<a name="x2013"></a> <a href="qsize.html">QSize</a> sh = m.<a href="qmainwindow.html#centralWidget">centralWidget</a>()-&gt;sizeHint();
276<a name="x2017"></a> m.<a href="qwidget.html#resize">resize</a>(sh.<a href="qsize.html#width">width</a>(),
277<a name="x2016"></a><a name="x2015"></a> sh.<a href="qsize.html#height">height</a>()+3*m.<a href="qmainwindow.html#statusBar">statusBar</a>()-&gt;height());
278 app.<a href="qapplication.html#setMainWidget">setMainWidget</a>(&amp;m);
279 m.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - QFD");
280<a name="x2014"></a> m.<a href="qwidget.html#show">show</a>();
281
282 return app.<a href="qapplication.html#exec">exec</a>();
283}
284</pre>
285
286<p>See also <a href="examples.html">Examples</a>.
287
288<!-- eof -->
289<p><address><hr><div align=center>
290<table width=100% cellspacing=0 border=0><tr>
291<td>Copyright &copy; 2007
292<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
293<td align=right><div align=right>Qt 3.3.8</div>
294</table></div></address></body>
295</html>
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