Shadow Popup Border
/*
* Copyright (c) 2001-2009 JGoodies Karsten Lentzsch. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* o 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.
*
* o Neither the name of JGoodies Karsten Lentzsch 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,
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Insets;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.border.AbstractBorder;
/**
* A border with a drop shadow intended to be used as the outer border
* of popups. Can paint the screen background if used with heavy-weight
* popup windows.
*
* @author Karsten Lentzsch
* @author Andrej Golovnin
* @version $Revision: 1.6 $
*
* @see ShadowPopup
* @see ShadowPopupFactory
*/
final class ShadowPopupBorder extends AbstractBorder {
/**
* The drop shadow needs 5 pixels at the bottom and the right hand side.
*/
private static final int SHADOW_SIZE = 5;
/**
* The singleton instance used to draw all borders.
*/
private static ShadowPopupBorder instance = new ShadowPopupBorder();
/**
* The drop shadow is created from a PNG image with 8 bit alpha channel.
*/
private static Image shadow
= new ImageIcon(ShadowPopupBorder.class.getResource("shadow.png")).getImage();
// Instance Creation *****************************************************
/**
* Returns the singleton instance used to draw all borders.
*/
public static ShadowPopupBorder getInstance() {
return instance;
}
/**
* Paints the border for the specified component with the specified
* position and size.
*/
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
// draw drop shadow
g.drawImage(shadow, x + 5, y + height - 5, x + 10, y + height, 0, 6, 5, 11, null, c);
g.drawImage(shadow, x + 10, y + height - 5, x + width - 5, y + height, 5, 6, 6, 11, null, c);
g.drawImage(shadow, x + width - 5, y + 5, x + width, y + 10, 6, 0, 11, 5, null, c);
g.drawImage(shadow, x + width - 5, y + 10, x + width, y + height - 5, 6, 5, 11, 6, null, c);
g.drawImage(shadow, x + width - 5, y + height - 5, x + width, y + height, 6, 6, 11, 11, null, c);
}
/**
* Returns the insets of the border.
*/
public Insets getBorderInsets(Component c) {
return new Insets(0, 0, SHADOW_SIZE, SHADOW_SIZE);
}
/**
* Reinitializes the insets parameter with this Border's current Insets.
* @param c the component for which this border insets value applies
* @param insets the object to be reinitialized
* @return the <code>insets</code> object
*/
public Insets getBorderInsets(Component c, Insets insets) {
insets.left = insets.top = 0;
insets.right = insets.bottom = SHADOW_SIZE;
return insets;
}
}
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