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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Qt Toolkit - qfd/qfd.cpp example file</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: white; color: black; }--></style></head><body bgcolor="#ffffff"><table width="100%"><tr><td><a href="index.html"><img width="100" height="100" src="qtlogo.png"alt="Home" border="0"><img width="100"height="100" src="face.png" alt="Home" border="0"></a><td valign="top"><div align="right"><img src="dochead.png" width="472" height="27"><br><a href="classes.html"><b>Classes</b></a>- <a href="annotated.html">Annotated</a>- <a href="hierarchy.html">Tree</a>- <a href="functions.html">Functions</a>- <a href="index.html">Home</a>- <a href="topicals.html"><b>Structure</b> <font face="Arial,Helvetica,Geneva,Swiss,SunSans-Regular" align="center" size=32>Qte</font></a></div></table><h1 align=center>Font Displayer</h1><br clear="all"> This example program displays all characters of a font. <hr> Header file: <pre>/****************************************************************************** $Id: qt/examples/qfd/fontdisplayer.h 2.3.8 edited 2004-05-12 $**** 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 QFrame { Q_OBJECTpublic: 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 QString&);public slots: void setRow(int);protected: <a href="qsize.html">QSize</a> cellSize() const; void paintEvent( <a href="qpaintevent.html">QPaintEvent</a>* );private: int row;};class FontDisplayer : public QMainWindow { Q_OBJECTpublic: FontDisplayer( <a href="qwidget.html">QWidget</a>* parent=0, const char* name=0 );};#endif</pre> <hr> Implementation: <pre>/****************************************************************************** $Id: qt/examples/qfd/fontdisplayer.cpp 2.3.8 edited 2004-05-12 $**** 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="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 <stdlib.h>FontRowTable::FontRowTable( <a href="qwidget.html">QWidget</a>* parent, const char* name ) : <a href="qframe.html">QFrame</a>(parent,name){ <a href="qwidget.html#e84bbe">setBackgroundMode</a>(PaletteBase); <a href="qframe.html#558f79">setFrameStyle</a>(Panel|Sunken); <a href="qframe.html#b11d00">setMargin</a>(8); <a href=#236>setRow</a>(0);}<a href="qsize.html">QSize</a> <a name="233"></a>FontRowTable::sizeHint() const{ return 16*cellSize()+QSize(2,2)*(<a href="qframe.html#cb5472">margin</a>()+frameWidth());}<a href="qsize.html">QSize</a> <a name="234"></a>FontRowTable::cellSize() const{ <a href="qfontmetrics.html">QFontMetrics</a> fm = fontMetrics(); return QSize( fm.<a href="qfontmetrics.html#20f575">maxWidth</a>(), fm.<a href="qfontmetrics.html#e6e380">lineSpacing</a>()+1 );}void <a name="235"></a>FontRowTable::paintEvent( <a href="qpaintevent.html">QPaintEvent</a>* e ){ <a href="qframe.html#963e1a">QFrame::paintEvent</a>(e); <a href="qpainter.html">QPainter</a> p(this); p.<a href="qpainter.html#15cc78">setClipRegion</a>(e-><a href="qpaintevent.html#dc5fc5">region</a>()); <a href="qrect.html">QRect</a> r = e-><a href="qpaintevent.html#2d6e18">rect</a>(); <a href="qfontmetrics.html">QFontMetrics</a> fm = fontMetrics(); int ml = frameWidth()+margin() + 1 + QMAX(0,-fm.<a href="qfontmetrics.html#de5799">minLeftBearing</a>()); int mt = frameWidth()+margin(); <a href="qsize.html">QSize</a> cell((<a href="qwidget.html#2edab1">width</a>()-15-ml)/16,(<a href="qwidget.html#e3c588">height</a>()-15-mt)/16); if ( !cell.<a href="qsize.html#37cddf">width</a>() || !cell.<a href="qsize.html#a35c26">height</a>() ) return; int mini = r.<a href="qrect.html#369cab">left</a>() / cell.<a href="qsize.html#37cddf">width</a>(); int maxi = (r.<a href="qrect.html#896e32">right</a>()+cell.<a href="qsize.html#37cddf">width</a>()-1) / cell.<a href="qsize.html#37cddf">width</a>(); int minj = r.<a href="qrect.html#4dd27e">top</a>() / cell.<a href="qsize.html#a35c26">height</a>(); int maxj = (r.<a href="qrect.html#2de4b0">bottom</a>()+cell.<a href="qsize.html#a35c26">height</a>()-1) / cell.<a href="qsize.html#a35c26">height</a>(); int h = fm.<a href="qfontmetrics.html#341253">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#37cddf">width</a>(); int y = j*cell.<a href="qsize.html#a35c26">height</a>(); <a href="qchar.html">QChar</a> ch = QChar(j*16+i,row); if ( fm.<a href="qfontmetrics.html#245094">inFont</a>(ch) ) { int w = fm.<a href="qfontmetrics.html#3b6f39">width</a>(ch); int l = fm.<a href="qfontmetrics.html#54cc7d">leftBearing</a>(ch); int r = fm.<a href="qfontmetrics.html#1057f3">rightBearing</a>(ch); x += ml; y += mt+h; p.<a href="qpainter.html#5308a7">fillRect</a>(x,y,w,-h,body); if ( w ) { if ( l ) { p.<a href="qpainter.html#5308a7">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#5308a7">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#0183e4">setPen</a>(<a href="qpen.html">QPen</a>(Qt::black)); p.<a href="qpainter.html#0f088f">drawText</a>(x,y,s); } } } }}void <a name="236"></a>FontRowTable::setRow(int r){ row = r; <a href="qfontmetrics.html">QFontMetrics</a> fm = fontMetrics(); <a href="qstring.html">QString</a> str; str.<a href="qstring.html#926f67">sprintf</a>("mLB=%d mRB=%d mW=%d", fm.<a href="qfontmetrics.html#de5799">minLeftBearing</a>(), fm.<a href="qfontmetrics.html#108c37">minRightBearing</a>(), fm.<a href="qfontmetrics.html#20f575">maxWidth</a>() ); emit fontInformation(str); <a href="qwidget.html#f3f721">update</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); <a href="qspinbox.html">QSpinBox</a> *row = new <a href="qspinbox.html">QSpinBox</a>(0,255,1,controls); <a href="qobject.html#fbde73">connect</a>(row,SIGNAL(valueChanged(int)),table,SLOT(setRow(int))); <a href="qobject.html#fbde73">connect</a>(table,SIGNAL(fontInformation(const QString&)), <a href="qmainwindow.html#530937">statusBar</a>(),SLOT(message(const QString&))); table->setRow(0); <a href="qmainwindow.html#fce9ba">setCentralWidget</a>(table);}</pre> <hr> Main:<pre>/****************************************************************************** $Id: qt/examples/qfd/qfd.cpp 2.3.8 edited 2004-05-12 $**** 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 name="qapplication.h"></a><a href="qapplication-h.html">qapplication.h</a>>#include <<a name="qslider.h"></a><a href="qslider-h.html">qslider.h</a>>#include <<a name="qpainter.h"></a><a href="qpainter-h.html">qpainter.h</a>>#include <<a name="qstatusbar.h"></a><a href="qstatusbar-h.html">qstatusbar.h</a>>int main(int argc, char** argv){ // Use an interesting font <a name="QApplication::setFont"></a><a href="qapplication.html#3d926a">QApplication::setFont</a>(<a name="QFont"></a><a href="qfont.html">QFont</a>("unifont",16)); <a name="QApplication"></a><a href="qapplication.html">QApplication</a> app(argc,argv); FontDisplayer m; <a name="QSize"></a><a href="qsize.html">QSize</a> sh = m.<a name="centralWidget"></a><a href="qmainwindow.html#4bc1f4">centralWidget</a>()->sizeHint(); m.<a name="resize"></a><a href="qwidget.html#ff9d07">resize</a>(sh.<a name="width"></a><a href="qsize.html#37cddf">width</a>(), sh.<a name="height"></a><a href="qsize.html#a35c26">height</a>()+3*m.<a name="statusBar"></a><a href="qmainwindow.html#530937">statusBar</a>()->height()); app.<a name="setMainWidget"></a><a href="qapplication.html#7ad759">setMainWidget</a>(&m); m.<a name="setCaption"></a><a href="qwidget.html#d6a291">setCaption</a>("Qt Example - QFD"); m.<a name="show"></a><a href="qmainwindow.html#eb53e3">show</a>(); return app.<a name="exec"></a><a href="qapplication.html#84c7bf">exec</a>();}</pre><p><address><hr><div align="center"><table width="100%" cellspacing="0" border="0"><tr><td>Copyright ⌨️ 快捷键说明
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