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/***************************************************************************
* $Id$
**
* Definition of something or other
**
* Created : 979899
**
* Copyright (C) 1997 by 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.util.Random;
class Forever extends QWidget
{
static final int numColors = 120;
private int rectangles;
private QColor[] colors = new QColor[numColors];
private Random generator = new Random(System.currentTimeMillis());
//
// Forever - a widget that draws rectangles forever.
//
//
// Constructs a Forever widget.
//
Forever( )
{
this(null, null);
}
Forever( QWidget parent, String name )
{
super( parent, name );
for (int a=0; a<numColors; a++) {
colors[a] = new QColor( generator.nextInt(255),
generator.nextInt(255),
generator.nextInt(255) );
}
rectangles = 0;
startTimer( 0 ); // run continuous timer
QTimer counter = new QTimer( this );
connect( counter, SIGNAL("timeout()"),
this, SLOT("updateCaption()") );
counter.start( 1000 );
}
void updateCaption()
{
String s = "Qt Example - Forever - " + rectangles + " rectangles/second";
rectangles = 0;
setCaption( s );
}
//
// Handles paint events for the Forever widget.
//
protected void paintEvent( QPaintEvent e )
{
QPainter paint = new QPainter( this ); // painter object
int w = width();
int h = height();
if(w <= 0 || h <= 0)
return;
paint.setPen( NoPen ); // do not draw outline
paint.setBrush( colors[generator.nextInt(numColors)]);// set random brush color
// QPoint p1 = new QPoint( generator.nextInt(w), generator.nextInt(h)); // p1 = top left
// QPoint p2 = new QPoint( generator.nextInt(w), generator.nextInt(h)); // p2 = bottom right
// QRect r = new QRect( p1, p2 );
// paint.drawRect( r ); // draw filled rectangle
paint.drawRect( generator.nextInt(w), generator.nextInt(h),
generator.nextInt(w), generator.nextInt(h) ); // draw filled rectangle
}
//
// Handles timer events for the Forever widget.
//
protected void timerEvent( QTimerEvent e )
{
for ( int i=0; i<100; i++ ) {
repaint( false ); // repaint, don't erase
rectangles++;
}
}
//
// Create and display Forever widget.
//
public static void main( String[] args )
{
QApplication a = new QApplication( args ); // create application object
Forever always = new Forever(); // create widget
a.setMainWidget( always ); // set as main widget
always.setCaption("Qt Example - Forever");
always.show(); // show widget
a.exec(); // run event loop
return;
}
static {
qtjava.initialize();
}
}
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