Java/2D Graphics GUI/XOR
Another XOR example
<source lang="java"> import java.awt.Color; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.geom.AffineTransform; import java.awt.geom.Rectangle2D; import javax.swing.JFrame; import javax.swing.JPanel; public class XORRectangles extends JPanel{
public void paint(Graphics g) { Graphics2D g2 = (Graphics2D) g; // using white as the XOR color. g2.setXORMode(Color.white); // Paint a red rectangle. Rectangle2D r = new Rectangle2D.Double(50, 50, 150, 100); g2.setPaint(Color.red); g2.fill(r); g2.transform(AffineTransform.getTranslateInstance(25, 25)); // Draw a blue rectangle. g2.setPaint(Color.blue); g2.fill(r); } public static void main(String[] args) { JFrame f = new JFrame(); f.getContentPane().add(new XORRectangles()); f.setSize(300, 200); f.setVisible(true); }
}
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Layers - Try to use alpha values (transparency) to draw in layers
<source lang="java"> /*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002. * All rights reserved. Software written by Ian F. Darwin and others. * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $ * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS"" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee * cup" logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s, * pioneering role in inventing and promulgating (and standardizing) the Java * language and environment is gratefully acknowledged. * * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for * inventing predecessor languages C and C++ is also gratefully acknowledged. */
import java.awt.Color; import java.awt.Graphics; import javax.swing.JFrame; /**
* Layers - Try to use "alpha values (transparency) to draw in layers. * * @author Ian Darwin, http://www.darwinsys.ru/ * @version $Id: Layers.java,v 1.5 2004/02/09 03:33:49 ian Exp $ */
public class Layers extends JFrame {
int width, height; Layers(String s) { this(s, 400, 300); } Layers(String s, int w, int h) { setTitle(s); setSize(width = w, height = h); // a short form setBackground(Color.black); setDefaultCloseOperation(EXIT_ON_CLOSE); } public void paint(Graphics g) { Color c1 = new Color(200, 100, 100, 50); // r, g, b, a Color c2 = new Color(100, 200, 000, 128); Color c3 = new Color(100, 200, 000, 255); g.setColor(c1); g.fillRect(0, 0, width / 2, height / 2); g.setColor(c2); g.fillRect(width / 4, height / 4, width / 2, height / 2); g.setColor(c3); g.fillRect(width / 3, height / 3, width / 4, height / 4); } public static void main(String[] a) { new Layers("Default Size").setVisible(true); new Layers("Smaller", 100, 100).setVisible(true); }
}
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