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/***************************************************************************
* $Id$
**
* 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.
**
****************************************************************************/
import org.kde.qt.*;
import java.math.*;
class FontDisplayer extends QMainWindow {
class FontRowTable extends QFrame {
private QFont tablefont;
private int row;
FontRowTable( QWidget parent )
{
this(parent, null);
}
FontRowTable( QWidget parent, String name )
{
super(parent,name);
setBackgroundMode(PaletteBase);
setFrameStyle(Panel|Sunken);
setMargin(8);
setRow(0);
tablefont = QApplication.font();
}
public QSize sizeHint()
{
return new QSize( 16*cellSize().width()+2*(margin()+frameWidth()),
16*cellSize().height()+2*(margin()+frameWidth()) );
}
QSize cellSize()
{
QFontMetrics fm = fontMetrics();
return new QSize( fm.maxWidth(), fm.lineSpacing()+1 );
}
protected void paintEvent( QPaintEvent e )
{
super.paintEvent(e);
System.out.println("In paintEvent");
QPainter p = new QPainter(this);
p.setClipRegion(e.region());
QRect r = e.rect();
QFontMetrics fm = fontMetrics();
int ml = frameWidth()+margin() + 1 + (-fm.minLeftBearing() > 0 ? -fm.minLeftBearing() : 0);
int mt = frameWidth()+margin();
QSize cell = new QSize((width()-15-ml)/16,(height()-15-mt)/16);
if ( cell.width() == 0 || cell.height() == 0 )
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 = new QColor(255,255,192);
QColor negative = new QColor(255,192,192);
QColor positive = new QColor(192,192,255);
QColor rnegative = new QColor(255,128,128);
QColor rpositive = new QColor(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();
char ch = (char) ((j*16+i) + (row*256));
if ( fm.inFont(ch) ) {
int w = fm.width(ch);
int lb = fm.leftBearing(ch);
int rb = fm.rightBearing(ch);
x += ml;
y += mt+h;
p.fillRect(x,y,w,-h,new QBrush(body));
if ( w != 0) {
if ( lb != 0 ) {
p.fillRect(x+(lb>0?0:lb), y-h/2, Math.abs(lb),-h/2,
new QBrush(lb < 0 ? negative : positive));
}
if ( rb != 0) {
p.fillRect(x+w-(rb>0?rb:0),y+2, Math.abs(rb),-h/2,
new QBrush(rb < 0 ? rnegative : rpositive));
}
}
String s = "";
s += ch;
p.setPen(new QPen(Qt.black()));
p.drawText(x,y,s);
}
}
}
}
p.end();
}
void setRow(int r)
{
row = r;
QFontMetrics fm = fontMetrics();
String str = "mLB=" + fm.minLeftBearing() +
" mRB=" + fm.minRightBearing() +
" mW=" + fm.maxWidth();
emit("fontInformation", str);
update();
}
void chooseFont()
{
boolean[] ok = { true };
QFont oldfont = tablefont;
tablefont = QFontDialog.getFont(ok, oldfont, this);
if (ok[0])
setFont(tablefont);
else
tablefont = oldfont;
}
}
FontDisplayer( )
{
this(null, null);
}
FontDisplayer( QWidget parent, String name )
{
super(parent,name);
FontRowTable table = new FontRowTable(this);
QToolBar controls = new QToolBar(this);
new QLabel(tr("Row:"), controls);
QSpinBox row = new QSpinBox(0,255,1,controls);
controls.addSeparator();
QPushButton fontbutton = new QPushButton(tr("Font..."), controls);
connect(row,SIGNAL("valueChanged(int)"),table,SLOT("setRow(int)"));
connect(fontbutton, SIGNAL("clicked()"), table, SLOT("chooseFont()"));
connect(table,SIGNAL("fontInformation(String)"),
statusBar(),SLOT("message(String)"));
table.setRow(0);
setCentralWidget(table);
}
}
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