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This example program displays all characters of a font.
Header file:
/**************************************************************************** ** $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 TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #ifndef FontDisplayer_H #define FontDisplayer_H #include <ntqframe.h> #include <ntqmainwindow.h> class TQSlider; class FontRowTable : public TQFrame { TQ_OBJECT public: FontRowTable( TQWidget* parent=0, const char* name=0 ); TQSize sizeHint() const; signals: void fontInformation(const TQString&); public slots: void setRow(int); void chooseFont(); protected: TQSize cellSize() const; void paintEvent( TQPaintEvent* ); private: TQFont tablefont; int row; }; class FontDisplayer : public TQMainWindow { TQ_OBJECT public: FontDisplayer( TQWidget* parent=0, const char* name=0 ); }; #endif
Implementation:
/**************************************************************************** ** $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 TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #include "fontdisplayer.h" #include <ntqapplication.h> #include <ntqslider.h> #include <ntqspinbox.h> #include <ntqpainter.h> #include <ntqtoolbar.h> #include <ntqstatusbar.h> #include <ntqlabel.h> #include <ntqpushbutton.h> #include <ntqfontdialog.h> #include <stdlib.h> FontRowTable::FontRowTable( TQWidget* parent, const char* name ) : TQFrame(parent,name) { setBackgroundMode(PaletteBase); setFrameStyle(Panel|Sunken); setMargin(8); setRow(0); tablefont = TQApplication::font(); } TQSize FontRowTable::sizeHint() const { return 24*cellSize()+TQSize(2,2)*(margin()+frameWidth()); } TQSize FontRowTable::cellSize() const { TQFontMetrics fm = fontMetrics(); return TQSize( fm.maxWidth(), fm.lineSpacing()+1 ); } void FontRowTable::paintEvent( TQPaintEvent* e ) { TQFrame::paintEvent(e); TQPainter p(this); p.setClipRegion(e->region()); TQRect r = e->rect(); TQFontMetrics fm = fontMetrics(); int ml = frameWidth()+margin() + 1 + TQMAX(0,-fm.minLeftBearing()); int mt = frameWidth()+margin(); TQSize cell((width()-15-ml)/16,(height()-15-mt)/16); if ( !cell.width() || !cell.height() ) return; int mini = r.left() / cell.width(); int maxi = (r.right()+cell.width()-1) / cell.width(); int minj = r.top() / cell.height(); int maxj = (r.bottom()+cell.height()-1) / cell.height(); int h = fm.height(); TQColor body(255,255,192); TQColor negative(255,192,192); TQColor positive(192,192,255); TQColor rnegative(255,128,128); TQColor 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.width(); int y = j*cell.height(); TQChar ch = TQChar(j*16+i,row); if ( fm.inFont(ch) ) { int w = fm.width(ch); int l = fm.leftBearing(ch); int r = fm.rightBearing(ch); x += ml; y += mt+h; p.fillRect(x,y,w,-h,body); if ( w ) { if ( l ) { p.fillRect(x+(l>0?0:l), y-h/2, abs(l),-h/2, l < 0 ? negative : positive); } if ( r ) { p.fillRect(x+w-(r>0?r:0),y+2, abs(r),-h/2, r < 0 ? rnegative : rpositive); } } TQString s; s += ch; p.setPen(TQPen(TQt::black)); p.drawText(x,y,s); } } } } } void FontRowTable::setRow(int r) { row = r; TQFontMetrics fm = fontMetrics(); TQFontInfo fi = fontInfo(); TQString str = TQString("%1 %2pt%3%4 mLB=%5 mRB=%6 mW=%7") .arg(fi.family()) .arg(fi.pointSize()) .arg(fi.bold() ? " bold" : "") .arg(fi.italic() ? " italic" : "") .arg(fm.minLeftBearing()) .arg(fm.minRightBearing()) .arg(fm.maxWidth()); emit fontInformation(str); update(); } void FontRowTable::chooseFont() { bool ok; TQFont oldfont = tablefont; tablefont = TQFontDialog::getFont(&ok, oldfont, this); if (ok) setFont(tablefont); else tablefont = oldfont; } FontDisplayer::FontDisplayer( TQWidget* parent, const char* name ) : TQMainWindow(parent,name) { FontRowTable* table = new FontRowTable(this); TQToolBar* controls = new TQToolBar(this); (void) new TQLabel(tr("Row:"), controls); TQSpinBox *row = new TQSpinBox(0,255,1,controls); controls->addSeparator(); TQPushButton *fontbutton = new TQPushButton(tr("Font..."), controls); connect(row,TQ_SIGNAL(valueChanged(int)),table,TQ_SLOT(setRow(int))); connect(fontbutton, TQ_SIGNAL(clicked()), table, TQ_SLOT(chooseFont())); connect(table,TQ_SIGNAL(fontInformation(const TQString&)), statusBar(),TQ_SLOT(message(const TQString&))); table->setRow(0); setCentralWidget(table); }
Main:
/**************************************************************************** ** $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 TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #include "fontdisplayer.h" #include <ntqapplication.h> #include <ntqslider.h> #include <ntqpainter.h> #include <ntqstatusbar.h> int main(int argc, char** argv) { TQApplication app(argc,argv); FontDisplayer m; TQSize sh = m.centralWidget()->sizeHint(); m.resize(sh.width(), sh.height()+3*m.statusBar()->height()); app.setMainWidget(&m); m.setCaption("TQt Example - TQFD"); m.show(); return app.exec(); }
See also Examples.
Copyright © 2007 Trolltech | Trademarks | TQt 3.3.8
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