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<title>Font Displayer</title>
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<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 3.3.8 edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA. 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_OBJECT
public:
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 3.3.8 edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA. 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="f531"></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="x1979"></a> tablefont = QApplication::<a href="qapplication.html#font">font</a>();
}
<a name="x1996"></a>QSize FontRowTable::<a href="qwidget.html#sizeHint">sizeHint</a>() const
{
return 24*cellSize()+QSize(2,2)*(<a href="qframe.html#margin">margin</a>()+frameWidth());
}
QSize <a name="f532"></a>FontRowTable::cellSize() const
{
<a href="qfontmetrics.html">QFontMetrics</a> fm = <a href="qwidget.html#fontMetrics">fontMetrics</a>();
<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 );
}
<a name="x1995"></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="x2002"></a><a name="x1999"></a> p.<a href="qpainter.html#setClipRegion">setClipRegion</a>(e-><a href="qpaintevent.html#region">region</a>());
<a name="x2001"></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="x1991"></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="x2008"></a><a name="x2007"></a> if ( !cell.<a href="qsize.html#width">width</a>() || !cell.<a href="qsize.html#height">height</a>() )
return;
int mini = r.<a href="qrect.html#left">left</a>() / cell.<a href="qsize.html#width">width</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="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>();
<a name="x1986"></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="x1987"></a> if ( fm.<a href="qfontmetrics.html#inFont">inFont</a>(ch) ) {
<a name="x1994"></a> int w = fm.<a href="qfontmetrics.html#width">width</a>(ch);
<a name="x1988"></a> int l = fm.<a href="qfontmetrics.html#leftBearing">leftBearing</a>(ch);
<a name="x1993"></a> int r = fm.<a href="qfontmetrics.html#rightBearing">rightBearing</a>(ch);
x += ml;
y += mt+h;
<a name="x1998"></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="f533"></a>FontRowTable::setRow(int r)
{
row = r;
<a href="qfontmetrics.html">QFontMetrics</a> fm = <a href="qwidget.html#fontMetrics">fontMetrics</a>();
<a href="qfontinfo.html">QFontInfo</a> fi = <a href="qwidget.html#fontInfo">fontInfo</a>();
<a href="qstring.html">QString</a> str = QString("%1 %2pt%3%4 mLB=%5 mRB=%6 mW=%7")
<a name="x1983"></a> .arg(fi.<a href="qfontinfo.html#family">family</a>())
<a name="x1985"></a> .arg(fi.<a href="qfontinfo.html#pointSize">pointSize</a>())
<a name="x1982"></a> .arg(fi.<a href="qfontinfo.html#bold">bold</a>() ? " bold" : "")
<a name="x1984"></a> .arg(fi.<a href="qfontinfo.html#italic">italic</a>() ? " italic" : "")
.arg(fm.<a href="qfontmetrics.html#minLeftBearing">minLeftBearing</a>())
<a name="x1992"></a> .arg(fm.<a href="qfontmetrics.html#minRightBearing">minRightBearing</a>())
.arg(fm.<a href="qfontmetrics.html#maxWidth">maxWidth</a>());
emit fontInformation(str);
<a href="qwidget.html#update">update</a>();
}
void <a name="f534"></a>FontRowTable::chooseFont()
{
bool ok;
<a href="qfont.html">QFont</a> oldfont = tablefont;
<a name="x1981"></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="f530"></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="x2010"></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="x2009"></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 3.3.8 edited Jan 11 14:37 $
**
** Copyright (C) 1992-2007 Trolltech ASA. 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)
{
<a href="qapplication.html">QApplication</a> app(argc,argv);
FontDisplayer m;
<a name="x2013"></a> <a href="qsize.html">QSize</a> sh = m.<a href="qmainwindow.html#centralWidget">centralWidget</a>()->sizeHint();
<a name="x2017"></a> m.<a href="qwidget.html#resize">resize</a>(sh.<a href="qsize.html#width">width</a>(),
<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>()->height());
app.<a href="qapplication.html#setMainWidget">setMainWidget</a>(&m);
m.<a href="qwidget.html#setCaption">setCaption</a>("Qt Example - QFD");
<a name="x2014"></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>.
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