/*
* Copyright (c) 2007, Romain Guy
* 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.
*/
package org.clothocore.tool.pluginmanager.gui;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.LayoutManager;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import javax.swing.JPanel;
import org.openide.util.ImageUtilities;
public class GradientPanel extends JPanel {
protected BufferedImage gradientImage;
protected static BufferedImage close = (BufferedImage) ImageUtilities.loadImage("org/clothocore/tool/pluginmanager/images/close.png", false);
//JCA these colors correspond to background colors of entire window
protected Color gradientStart = new Color(0, 0, 0);
protected Color gradientEnd = new Color(25, 25, 25);
public GradientPanel() {
this(new BorderLayout());
}
public GradientPanel(LayoutManager layout) {
super(layout);
addComponentListener(new GradientCacheManager());
}
@Override
protected void paintComponent(Graphics g) {
createImageCache();
if (gradientImage != null) {
g.drawImage(gradientImage, 0, 0, getWidth(), getHeight(), null);
}
g.drawImage(close, getWidth() - 26, 5, 18, 18, null);
}
protected void createImageCache() {
int width = 2;
int height = getHeight();
if (width == 0 || height == 0) {
return;
}
if (gradientImage == null ||
width != gradientImage.getWidth() ||
height != gradientImage.getHeight()) {
gradientImage = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = gradientImage.createGraphics();
GradientPaint painter = new GradientPaint(0, 0, gradientEnd,
0, height / 2, gradientStart);
g2.setPaint(painter);
Rectangle2D rect = new Rectangle2D.Double(0, 0, width, height / 2.0);
g2.fill(rect);
painter = new GradientPaint(0, height / 2, gradientStart,
0, height, gradientEnd);
g2.setPaint(painter);
rect = new Rectangle2D.Double(0, (height / 2.0) - 1.0, width, height);
g2.fill(rect);
g2.dispose();
}
}
private void disposeImageCache() {
synchronized (gradientImage) {
gradientImage.flush();
gradientImage = null;
}
}
private class GradientCacheManager implements ComponentListener {
public void componentResized(ComponentEvent e) {
}
public void componentMoved(ComponentEvent e) {
}
public void componentShown(ComponentEvent e) {
}
public void componentHidden(ComponentEvent e) {
disposeImageCache();
}
}
}