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120 lines
3.2 KiB
120 lines
3.2 KiB
/****************************************************************************
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** $Id$
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**
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** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
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**
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** This file is part of an example program for Qt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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import org.kde.qt.*;
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class PictureDisplay extends QWidget // picture display widget
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{
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static void paintCar( QPainter p ) // paint a car
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{
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QPointArray a = new QPointArray();
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QBrush brush = new QBrush( Qt.yellow(), Qt.SolidPattern );
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p.setBrush( brush ); // use solid, yellow brush
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a.setPoints( 5, new short[] { 50,50, 350,50, 450,120, 450,250, 50,250 } );
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p.drawPolygon( a ); // draw car body
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QFont f = new QFont( "courier", 12, QFont.Bold, false );
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p.setFont( f );
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QColor windowColor = new QColor( 120, 120, 255 ); // a light blue color
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brush.setColor( windowColor ); // set this brush color
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p.setBrush( brush ); // set brush
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p.drawRect( 80, 80, 250, 70 ); // car window
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p.drawText( 180, 80, 150, 70, Qt.AlignCenter, "-- Qt --\nTrolltech AS" );
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QPixmap pixmap = new QPixmap();
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if ( pixmap.load("flag.bmp") ) // load and draw image
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p.drawPixmap( 100, 90, pixmap );
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p.setBackgroundMode( Qt.OpaqueMode ); // set opaque mode
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p.setBrush( Qt.DiagCrossPattern ); // black diagonal cross pattern
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p.drawEllipse( 90, 210, 80, 80 ); // back wheel
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p.setBrush( Qt.CrossPattern ); // black cross fill pattern
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p.drawEllipse( 310, 210, 80, 80 ); // front wheel
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}
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private QPicture pict;
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private String name;
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public PictureDisplay( String fileName )
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{
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pict = new QPicture();
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name = fileName;
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if ( !pict.load(fileName) ) { // cannot load picture
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pict = null;
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name = "Not able to load picture: " + fileName;
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}
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}
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protected void paintEvent( QPaintEvent event )
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{
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QPainter paint = new QPainter( this ); // paint widget
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if ( pict != null )
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paint.drawPicture( pict ); // draw picture
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else
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paint.drawText( rect(), AlignCenter, name );
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}
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protected void keyPressEvent( QKeyEvent k )
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{
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// switch ( tolower(k.ascii()) ) {
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switch ( k.ascii() ) {
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case 'r': // reload
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pict.load( name );
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update();
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break;
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case 'q': // quit
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QApplication.exit();
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break;
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}
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}
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static public void main( String[] args )
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{
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QApplication a = new QApplication( args ); // QApplication required!
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String fileName = "car.pic"; // default picture file name
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if ( args.length == 1 ) // use argument as file name
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fileName = args[0];
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if ( !QFile.exists(fileName) ) {
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QPicture pict = new QPicture(); // our picture
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QPainter paint = new QPainter(); // our painter
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paint.begin( pict ); // begin painting onto picture
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paintCar( paint ); // paint!
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paint.end(); // painting done
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pict.save( fileName ); // save picture
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QMessageBox.information(null, "Qt picture example", "Saved. Run me again!");
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return;
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} else {
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PictureDisplay test = new PictureDisplay( fileName ); // create picture display
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a.setMainWidget( test); // set main widget
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test.show(); // show it
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a.exec(); // start event loop
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return;
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}
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}
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static {
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qtjava.initialize();
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}
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}
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