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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/examples/qfd/qfd.doc:4 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Font Displayer</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: #ffffff; color: black; }--></style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr bgcolor="#E5E5E5"><td valign=center> <a href="index.html"><font color="#004faf">Home</font></a> | <a href="classes.html"><font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> | <a href="annotated.html"><font color="#004faf">Annotated</font></a> | <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"><font color="#004faf">Functions</font></a></td><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> <p> This example program displays all characters of a font.<p> <hr><p> Header file:<p> <pre>/****************************************************************************** $Id: qt/fontdisplayer.h 3.0.5 edited Oct 12 2001 $**** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.**** This file is part of an example program for Qt. This example** program may be used, distributed and modified without limitation.*******************************************************************************/#ifndef FontDisplayer_H#define FontDisplayer_H#include <<a href="qframe-h.html">qframe.h</a>>#include <<a href="qmainwindow-h.html">qmainwindow.h</a>>class QSlider;class FontRowTable : public <a href="qframe.html">QFrame</a> { <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>public: FontRowTable( <a href="qwidget.html">QWidget</a>* parent=0, const char* name=0 ); <a href="qsize.html">QSize</a> sizeHint() const;signals: void fontInformation(const <a href="qstring.html">QString</a>&);public slots: void setRow(int); void chooseFont();protected: <a href="qsize.html">QSize</a> cellSize() const; void paintEvent( <a href="qpaintevent.html">QPaintEvent</a>* );private: <a href="qfont.html">QFont</a> tablefont; int row;};class FontDisplayer : public <a href="qmainwindow.html">QMainWindow</a> { Q_OBJECTpublic: FontDisplayer( <a href="qwidget.html">QWidget</a>* parent=0, const char* name=0 );};#endif</pre><p> <hr><p> Implementation:<p> <pre>/****************************************************************************** $Id: qt/fontdisplayer.cpp 3.0.5 edited Oct 12 2001 $**** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.**** This file is part of an example program for Qt. This example** program may be used, distributed and modified without limitation.*******************************************************************************/#include "fontdisplayer.h"#include <<a href="qapplication-h.html">qapplication.h</a>>#include <<a href="qslider-h.html">qslider.h</a>>#include <<a href="qspinbox-h.html">qspinbox.h</a>>#include <<a href="qpainter-h.html">qpainter.h</a>>#include <<a href="qtoolbar-h.html">qtoolbar.h</a>>#include <<a href="qstatusbar-h.html">qstatusbar.h</a>>#include <<a href="qlabel-h.html">qlabel.h</a>>#include <<a href="qpushbutton-h.html">qpushbutton.h</a>>#include <<a href="qfontdialog-h.html">qfontdialog.h</a>>#include <stdlib.h><a name="f530"></a>FontRowTable::FontRowTable( <a href="qwidget.html">QWidget</a>* parent, const char* name ) : <a href="qframe.html">QFrame</a>(parent,name){ <a href="qwidget.html#setBackgroundMode">setBackgroundMode</a>(PaletteBase); <a href="qframe.html#setFrameStyle">setFrameStyle</a>(Panel|Sunken); <a href="qframe.html#setMargin">setMargin</a>(8); setRow(0);<a name="x1965"></a> tablefont = QApplication::<a href="qapplication.html#font">font</a>();}<a name="x1978"></a>QSize FontRowTable::<a href="qwidget.html#sizeHint">sizeHint</a>() const{ return 16*cellSize()+QSize(2,2)*(<a href="qframe.html#margin">margin</a>()+frameWidth());}QSize <a name="f531"></a>FontRowTable::cellSize() const{ <a href="qfontmetrics.html">QFontMetrics</a> fm = <a href="qwidget.html#fontMetrics">fontMetrics</a>();<a name="x1972"></a><a name="x1971"></a> return QSize( fm.<a href="qfontmetrics.html#maxWidth">maxWidth</a>(), fm.<a href="qfontmetrics.html#lineSpacing">lineSpacing</a>()+1 );}<a name="x1977"></a>void FontRowTable::<a href="qframe.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">QPaintEvent</a>* e ){ QFrame::<a href="qframe.html#paintEvent">paintEvent</a>(e); <a href="qpainter.html">QPainter</a> p(this);<a name="x1984"></a><a name="x1981"></a> p.<a href="qpainter.html#setClipRegion">setClipRegion</a>(e-><a href="qpaintevent.html#region">region</a>());<a name="x1983"></a> <a href="qrect.html">QRect</a> r = e-><a href="qpaintevent.html#rect">rect</a>(); <a href="qfontmetrics.html">QFontMetrics</a> fm = <a href="qwidget.html#fontMetrics">fontMetrics</a>();<a name="x1973"></a> int ml = <a href="qframe.html#frameWidth">frameWidth</a>()+margin() + 1 + QMAX(0,-fm.<a href="qfontmetrics.html#minLeftBearing">minLeftBearing</a>()); int mt = <a href="qframe.html#frameWidth">frameWidth</a>()+margin(); <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);<a name="x1990"></a><a name="x1989"></a> if ( !cell.<a href="qsize.html#width">width</a>() || !cell.<a href="qsize.html#height">height</a>() ) return;<a name="x1986"></a> int mini = r.<a href="qrect.html#left">left</a>() / cell.<a href="qsize.html#width">width</a>();<a name="x1987"></a> 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>(); int minj = r.<a href="qrect.html#top">top</a>() / cell.<a href="qsize.html#height">height</a>();<a name="x1985"></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>();<a name="x1968"></a> int h = fm.<a href="qfontmetrics.html#height">height</a>(); <a href="qcolor.html">QColor</a> body(255,255,192); <a href="qcolor.html">QColor</a> negative(255,192,192); <a href="qcolor.html">QColor</a> positive(192,192,255); <a href="qcolor.html">QColor</a> rnegative(255,128,128); <a href="qcolor.html">QColor</a> rpositive(128,128,255); for (int j = minj; j<=maxj; j++) { for (int i = mini; i<=maxi; i++) { if ( i < 16 && j < 16 ) { int x = i*cell.<a href="qsize.html#width">width</a>(); int y = j*cell.<a href="qsize.html#height">height</a>(); <a href="qchar.html">QChar</a> ch = QChar(j*16+i,row);<a name="x1969"></a> if ( fm.<a href="qfontmetrics.html#inFont">inFont</a>(ch) ) {<a name="x1976"></a> int w = fm.<a href="qfontmetrics.html#width">width</a>(ch);<a name="x1970"></a> int l = fm.<a href="qfontmetrics.html#leftBearing">leftBearing</a>(ch);<a name="x1975"></a> int r = fm.<a href="qfontmetrics.html#rightBearing">rightBearing</a>(ch); x += ml; y += mt+h;<a name="x1980"></a> p.<a href="qpainter.html#fillRect">fillRect</a>(x,y,w,-h,body); if ( w ) { if ( l ) { p.<a href="qpainter.html#fillRect">fillRect</a>(x+(l>0?0:l), y-h/2, abs(l),-h/2, l < 0 ? negative : positive); } if ( r ) { p.<a href="qpainter.html#fillRect">fillRect</a>(x+w-(r>0?r:0),y+2, abs(r),-h/2, r < 0 ? rnegative : rpositive); } } <a href="qstring.html">QString</a> s; s += ch; p.<a href="qpainter.html#setPen">setPen</a>(QPen(Qt::black)); p.<a href="qpainter.html#drawText">drawText</a>(x,y,s); } } } }}void <a name="f532"></a>FontRowTable::setRow(int r){ row = r; <a href="qfontmetrics.html">QFontMetrics</a> fm = <a href="qwidget.html#fontMetrics">fontMetrics</a>(); <a href="qstring.html">QString</a> str; str.<a href="qstring.html#sprintf">sprintf</a>("mLB=%d mRB=%d mW=%d", fm.<a href="qfontmetrics.html#minLeftBearing">minLeftBearing</a>(),<a name="x1974"></a> fm.<a href="qfontmetrics.html#minRightBearing">minRightBearing</a>(), fm.<a href="qfontmetrics.html#maxWidth">maxWidth</a>() ); emit fontInformation(str); <a href="qwidget.html#update">update</a>();}void <a name="f533"></a>FontRowTable::chooseFont(){ bool ok; <a href="qfont.html">QFont</a> oldfont = tablefont;<a name="x1967"></a> tablefont = QFontDialog::<a href="qfontdialog.html#getFont">getFont</a>(&ok, oldfont, this); if (ok) <a href="qwidget.html#setFont">setFont</a>(tablefont); else tablefont = oldfont;}<a name="f529"></a>FontDisplayer::FontDisplayer( <a href="qwidget.html">QWidget</a>* parent, const char* name ) : <a href="qmainwindow.html">QMainWindow</a>(parent,name){ FontRowTable* table = new FontRowTable(this); <a href="qtoolbar.html">QToolBar</a>* controls = new <a href="qtoolbar.html">QToolBar</a>(this); (void) new <a href="qlabel.html">QLabel</a>(<a href="qobject.html#tr">tr</a>("Row:"), controls); <a href="qspinbox.html">QSpinBox</a> *row = new <a href="qspinbox.html">QSpinBox</a>(0,255,1,controls);<a name="x1993"></a> controls-><a href="qtoolbar.html#addSeparator">addSeparator</a>(); <a href="qpushbutton.html">QPushButton</a> *fontbutton = new <a href="qpushbutton.html">QPushButton</a>(<a href="qobject.html#tr">tr</a>("Font..."), controls);<a name="x1991"></a> <a href="qobject.html#connect">connect</a>(row,SIGNAL(<a href="qspinbox.html#valueChanged">valueChanged</a>(int)),table,SLOT(setRow(int))); <a href="qobject.html#connect">connect</a>(fontbutton, SIGNAL(<a href="qbutton.html#clicked">clicked</a>()), table, SLOT(chooseFont())); <a href="qobject.html#connect">connect</a>(table,SIGNAL(fontInformation(const <a href="qstring.html">QString</a>&)), <a href="qmainwindow.html#statusBar">statusBar</a>(),SLOT(message(const <a href="qstring.html">QString</a>&))); table->setRow(0); <a href="qmainwindow.html#setCentralWidget">setCentralWidget</a>(table);}</pre><p> <hr><p> Main:<p> <pre>/****************************************************************************** $Id: qt/qfd.cpp 3.0.5 edited Oct 12 2001 $**** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.**** This file is part of an example program for Qt. This example** program may be used, distributed and modified without limitation.*******************************************************************************/#include "fontdisplayer.h"#include <<a href="qapplication-h.html">qapplication.h</a>>#include <<a href="qslider-h.html">qslider.h</a>>#include <<a href="qpainter-h.html">qpainter.h</a>>#include <<a href="qstatusbar-h.html">qstatusbar.h</a>>int main(int argc, char** argv){ // Use an interesting font<a name="x1995"></a> QApplication::<a href="qapplication.html#setFont">setFont</a>(QFont("unifont",16)); <a href="qapplication.html">QApplication</a> app(argc,argv); FontDisplayer m;<a name="x1997"></a> <a href="qsize.html">QSize</a> sh = m.<a href="qmainwindow.html#centralWidget">centralWidget</a>()->sizeHint();<a name="x2001"></a> m.<a href="qwidget.html#resize">resize</a>(sh.<a href="qsize.html#width">width</a>(),<a name="x2000"></a><a name="x1999"></a> sh.<a href="qsize.html#height">height</a>()+3*m.<a href="qmainwindow.html#statusBar">statusBar</a>()->height()); app.<a href="qapplication.html#setMainWidget">setMainWidget</a>(&m); m.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - QFD");<a name="x1998"></a> m.<a href="qwidget.html#show">show</a>(); return app.<a href="qapplication.html#exec">exec</a>();}</pre><p>See also <a href="examples.html">Examples</a>.<!-- eof --><p><address><hr><div align=center><table width=100% cellspacing=0 border=0><tr><td>Copyright © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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