Translucent Button : Fade « Advanced Graphics « Java

1. Java
2. Advanced Graphics
3. Fade

Translucent Button

 
 


import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

/*
 * TranslucentButton.java
 *
 * Created on May 1, 2007, 3:54 PM
 *
 * 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 TranslucentButton extends JButton {

  BufferedImage buttonImage = null;

  /** Creates a new instance of TranslucentButton */
  public TranslucentButton(String label) {
    super(label);
    setOpaque(false);
  }

  public void paint(Graphics g) {
    // Create an image for the button graphics if necessary
    if (buttonImage == null || buttonImage.getWidth() != getWidth()
        || buttonImage.getHeight() != getHeight()) {
      buttonImage = getGraphicsConfiguration().createCompatibleImage(getWidth(), getHeight());
    }
    Graphics gButton = buttonImage.getGraphics();
    gButton.setClip(g.getClip());

    // Have the superclass render the button for us
    super.paint(gButton);

    // Make the graphics object sent to this paint() method translucent
    Graphics2D g2d = (Graphics2D) g;
    AlphaComposite newComposite = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, .5f);
    g2d.setComposite(newComposite);

    // Copy the button's image to the destination graphics, translucently
    g2d.drawImage(buttonImage, 0, 0, null);
  }

  private static void createAndShowGUI() {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setSize(300, 300);
    JPanel checkerboard = new Checkerboard();
    checkerboard.add(new TranslucentButton("Translucent Button"));
    f.add(checkerboard);
    f.setVisible(true);
  }

  public static void main(String args[]) {
    Runnable doCreateAndShowGUI = new Runnable() {
      public void run() {
        createAndShowGUI();
      }
    };
    SwingUtilities.invokeLater(doCreateAndShowGUI);
  }

  private static class Checkerboard extends JPanel {
    private static final int DIVISIONS = 10;

    static final int CHECKER_SIZE = 60;

    public void paintComponent(Graphics g) {
      g.setColor(Color.white);
      g.fillRect(0, 0, getWidth(), getHeight());
      g.setColor(Color.BLACK);
      for (int stripeX = 0; stripeX < getWidth(); stripeX += CHECKER_SIZE) {
        for (int y = 0, row = 0; y < getHeight(); y += CHECKER_SIZE / 2, ++row) {
          int x = (row % 2 == 0) ? stripeX : (stripeX + CHECKER_SIZE / 2);
          g.fillRect(x, y, CHECKER_SIZE / 2, CHECKER_SIZE / 2);
        }
      }
    }
  }
}

 

 

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