001 /*
002 * $Id: RepaintManagerX.java 3290 2009-03-10 17:30:14Z kschaefe $
003 *
004 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
005 * Santa Clara, California 95054, U.S.A. All rights reserved.
006 *
007 * This library is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * This library is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 * Lesser General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
020 */
021
022 package org.jdesktop.swingx;
023
024 import java.awt.Container;
025 import java.awt.Rectangle;
026
027 import javax.swing.JComponent;
028 import javax.swing.RepaintManager;
029
030 /**
031 * <p>An implementation of {@link RepaintManager} which adds support for transparency
032 * in {@link JXPanel}s. <code>JXPanel</code> (which supports translucency) will
033 * replace the current RepaintManager with an instance of RepaintManagerX
034 * <em>unless</em> the current RepaintManager is tagged by the {@link TranslucentRepaintManager}
035 * annotation.</p>
036 *
037 * @author zixle
038 * @author rbair
039 */
040 @TranslucentRepaintManager
041 public class RepaintManagerX extends ForwardingRepaintManager {
042 /**
043 * @param delegate
044 */
045 public RepaintManagerX(RepaintManager delegate) {
046 super(delegate);
047 }
048
049 /**
050 * Add a component in the list of components that should be refreshed.
051 * If <i>c</i> already has a dirty region, the rectangle <i>(x,y,w,h)</i>
052 * will be unioned with the region that should be redrawn.
053 *
054 * @param c Component to repaint, null results in nothing happening.
055 * @param x X coordinate of the region to repaint
056 * @param y Y coordinate of the region to repaint
057 * @param w Width of the region to repaint
058 * @param h Height of the region to repaint
059 * @see JComponent#repaint
060 */
061 public void addDirtyRegion(JComponent c, int x, int y, int w, int h) {
062 Rectangle dirtyRegion = getDirtyRegion(c);
063 if (dirtyRegion.width == 0 && dirtyRegion.height == 0) {
064 int lastDeltaX = c.getX();
065 int lastDeltaY = c.getY();
066 Container parent = c.getParent();
067 while (parent instanceof JComponent) {
068 if (!parent.isVisible() || !parent.isDisplayable()) {
069 return;
070 }
071 if (parent instanceof JXPanel && (((JXPanel)parent).getAlpha() < 1f ||
072 !parent.isOpaque())) {
073 x += lastDeltaX;
074 y += lastDeltaY;
075 lastDeltaX = lastDeltaY = 0;
076 c = (JComponent)parent;
077 }
078 lastDeltaX += parent.getX();
079 lastDeltaY += parent.getY();
080 parent = parent.getParent();
081 }
082 }
083 super.addDirtyRegion(c, x, y, w, h);
084 }
085 }