org.jdesktop.swingx.RepaintManagerX Maven / Gradle / Ivy
/*
* $Id$
*
* Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
* Santa Clara, California 95054, U.S.A. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.jdesktop.swingx;
import java.awt.Point;
import javax.swing.JComponent;
import javax.swing.RepaintManager;
import javax.swing.SwingUtilities;
/**
* An implementation of {@link RepaintManager} which adds support for transparency
* in {@link JXPanel}s. JXPanel (which supports translucency) will
* replace the current RepaintManager with an instance of RepaintManagerX
* unless the current RepaintManager is tagged by the {@link TranslucentRepaintManager}
* annotation.
*
* @author zixle
* @author rbair
* @author Karl Schaefer
*/
@TranslucentRepaintManager
public class RepaintManagerX extends ForwardingRepaintManager {
/**
* Creates a new manager that forwards all calls to the delegate.
*
* @param delegate
* the manager backing this {@code RepaintManagerX}
* @throws NullPointerException
* if {@code delegate} is {@code null}
*/
public RepaintManagerX(RepaintManager delegate) {
super(delegate);
}
/**
* {@inheritDoc}
*/
@Override
public void addDirtyRegion(JComponent c, int x, int y, int w, int h) {
AlphaPaintable alphaPaintable = (AlphaPaintable) SwingUtilities.getAncestorOfClass(AlphaPaintable.class, c);
if (alphaPaintable != null && alphaPaintable.getAlpha() < 1f) {
Point p = SwingUtilities.convertPoint(c, x, y, (JComponent) alphaPaintable);
addDirtyRegion((JComponent) alphaPaintable, p.x, p.y, w, h);
} else {
super.addDirtyRegion(c, x, y, w, h);
}
}
}