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123 lines
2.8 KiB
123 lines
2.8 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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import java.util.Random;
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//
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// ConnectWidget - draws connected lines
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//
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class ConnectWidget extends TQWidget
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{
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static final int MAXPOINTS = 2000; // maximum number of points
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static final int MAXCOLORS = 40;
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private TQPoint[] points; // point array
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private TQColor[] colors; // color array
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private int count; // count = number of points
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private boolean down; // true if mouse down
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private Random generator = new Random(System.currentTimeMillis());
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//
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// Constructs a ConnectWidget.
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//
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public ConnectWidget( )
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{
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this(null, null);
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}
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public ConnectWidget( TQWidget parent, String name )
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{
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super( parent, name, WStaticContents );
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setBackgroundColor( white() ); // white background
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count = 0;
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down = false;
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points = new TQPoint[MAXPOINTS];
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colors = new TQColor[MAXCOLORS];
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for ( int i=0; i<MAXCOLORS; i++ ) // init color array
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colors[i] = new TQColor( generator.nextInt(255), generator.nextInt(255), generator.nextInt(255) );
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}
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//
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// Handles paint events for the connect widget.
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//
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protected void paintEvent( TQPaintEvent e )
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{
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TQPainter paint = new TQPainter( this );
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for ( int i=0; i<count-1; i++ ) { // connect all points
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for ( int j=i+1; j<count; j++ ) {
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paint.setPen( colors[generator.nextInt(MAXCOLORS)] ); // set random pen color
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paint.drawLine( points[i], points[j] ); // draw line
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}
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}
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paint.end();
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}
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//
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// Handles mouse press events for the connect widget.
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//
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protected void mousePressEvent( TQMouseEvent e )
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{
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down = true;
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count = 0; // start recording points
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erase(); // erase widget contents
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}
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//
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// Handles mouse release events for the connect widget.
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//
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protected void mouseReleaseEvent( TQMouseEvent e )
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{
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down = false; // done recording points
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update(); // draw the lines
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}
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//
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// Handles mouse move events for the connect widget.
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//
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protected void mouseMoveEvent( TQMouseEvent e )
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{
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if ( down && count < MAXPOINTS ) {
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TQPainter paint = new TQPainter( this );
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points[count++] = new TQPoint(e.pos()); // add point
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paint.drawPoint( e.pos() ); // plot point
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paint.end();
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}
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}
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//
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// Create and display a ConnectWidget.
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//
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public static void main( String[] args )
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{
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TQApplication a = new TQApplication( args );
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ConnectWidget connect = new ConnectWidget();
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connect.setCaption( "Qt Example - Draw lines");
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a.setMainWidget( connect );
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connect.show();
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a.exec();
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return;
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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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