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/****************************************************************************
** $Id: qt/examples/qfd/fontdisplayer.cpp 2.3.1 edited 2001-01-26 $
**
** 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 <qslider.h>
#include <qspinbox.h>
#include <qpainter.h>
#include <qtoolbar.h>
#include <qstatusbar.h>
#include <stdlib.h>
FontRowTable::FontRowTable( QWidget* parent, const char* name ) :
QFrame(parent,name)
{
setBackgroundMode(PaletteBase);
setFrameStyle(Panel|Sunken);
setMargin(8);
setRow(0);
}
QSize FontRowTable::sizeHint() const
{
return 16*cellSize()+QSize(2,2)*(margin()+frameWidth());
}
QSize FontRowTable::cellSize() const
{
QFontMetrics fm = fontMetrics();
return QSize( fm.maxWidth(), fm.lineSpacing()+1 );
}
void FontRowTable::paintEvent( QPaintEvent* e )
{
QFrame::paintEvent(e);
QPainter p(this);
p.setClipRegion(e->region());
QRect r = e->rect();
QFontMetrics fm = fontMetrics();
int ml = frameWidth()+margin() + 1 + QMAX(0,-fm.minLeftBearing());
int mt = frameWidth()+margin();
QSize 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();
QColor body(255,255,192);
QColor negative(255,192,192);
QColor positive(192,192,255);
QColor rnegative(255,128,128);
QColor 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();
QChar ch = QChar(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);
}
}
QString s;
s += ch;
p.setPen(QPen(Qt::black));
p.drawText(x,y,s);
}
}
}
}
}
void FontRowTable::setRow(int r)
{
row = r;
QFontMetrics fm = fontMetrics();
QString str;
str.sprintf("mLB=%d mRB=%d mW=%d",
fm.minLeftBearing(),
fm.minRightBearing(),
fm.maxWidth()
);
emit fontInformation(str);
update();
}
FontDisplayer::FontDisplayer( QWidget* parent, const char* name ) :
QMainWindow(parent,name)
{
FontRowTable* table = new FontRowTable(this);
QToolBar* controls = new QToolBar(this);
QSpinBox *row = new QSpinBox(0,255,1,controls);
connect(row,SIGNAL(valueChanged(int)),table,SLOT(setRow(int)));
connect(table,SIGNAL(fontInformation(const QString&)),
statusBar(),SLOT(message(const QString&)));
table->setRow(0);
setCentralWidget(table);
}
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