Mega Code Archive
Color Difference
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import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
/*
* ColorDifference.java
*
* Created on May 3, 2007, 7:12 AM
*
* Copyright (c) 2007, Sun Microsystems, Inc
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the TimingFramework project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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.
*/
/**
*
* @author Chet
*/
public class ColorDifference extends JComponent implements ActionListener {
private Color largeRectColors[] = { Color.BLACK, new Color(3, 3, 3) };
private Color smallRectColors[] = { Color.BLACK, Color.WHITE };
private int colorIndex = 0;
private static int FADE_X = 0;
private static int BLANK_X = 0;
/** Creates a new instance of ColorDifference */
public ColorDifference() {
Timer timer = new Timer(1000, this);
timer.start();
setPreferredSize(new Dimension(300, 200));
}
/**
* Displays our component with the animating colors of the areas on the left
* and right, separated by an area of white in the middle
*/
@Override
protected void paintComponent(Graphics g) {
int fadeX = 0;
int blankX = getWidth() / 3;
int bigRectW = getWidth() / 3;
// Fill left-side rectangle with current animating color
g.setColor(largeRectColors[colorIndex]);
g.fillRect(0, 0, bigRectW, getHeight());
// Fill middle area with white
g.setColor(Color.WHITE);
g.fillRect(bigRectW, 0, bigRectW, getHeight());
// Fill right-side rectangle with black, with a white square
// in the middle
int bigRectX = 2 * bigRectW;
int smallRectW = 4;
int smallRectH = 4;
int smallRectX = bigRectX + (bigRectW / 2) - (smallRectW / 2);
int smallRectY = (getHeight() / 2) - (smallRectH / 2);
g.setColor(Color.BLACK);
g.fillRect(2 * getWidth() / 3, 0, getWidth() / 3, getHeight());
g.setColor(smallRectColors[colorIndex]);
g.fillRect(smallRectX, smallRectY, smallRectW, smallRectH);
}
/**
* Handles Timer events by toggling the colorIndex used to fill the left-side
* rectangle
*/
public void actionPerformed(ActionEvent ae) {
colorIndex++;
colorIndex = colorIndex % 2;
repaint();
}
private static void createAndShowGUI() {
JFrame f = new JFrame("Color Difference");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(300, 200);
ColorDifference component = new ColorDifference();
f.add(component);
f.pack();
f.setVisible(true);
}
/**
* @param args
* the command line arguments
*/
public static void main(String[] args) {
Runnable doCreateAndShowGUI = new Runnable() {
public void run() {
createAndShowGUI();
}
};
SwingUtilities.invokeLater(doCreateAndShowGUI);
}
}
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