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/*
* Copyright (c) 2008-2011, Piccolo2D project, http://piccolo2d.org
* Copyright (c) 1998-2008, University of Maryland
* 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.
*
* None of the name of the University of Maryland, the name of the Piccolo2D project, or 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.piccolo2d.extras.swt;
import org.piccolo2d.PCamera;
import org.piccolo2d.PNode;
import org.piccolo2d.util.PBounds;
import org.piccolo2d.util.PPickPath;
/**
* A class for managing the position of a sticky handle.
*/
public class PSWTStickyHandleManager extends PNode {
private static final long serialVersionUID = 1L;
private PNode target;
private PCamera camera;
/**
* Creates a sticky handle that will be displayed on the given camera and
* will update the provided target.
*
* @param camera camera on which to display the sticky handle
* @param target target being controlled by the handle
*/
public PSWTStickyHandleManager(final PCamera camera, final PNode target) {
setCameraTarget(camera, target);
PSWTBoundsHandle.addBoundsHandlesTo(this);
}
/**
* Changes the associated camera and target for this sticky handle.
*
* @param newCamera new camera onto which this handle should appear
* @param newTarget new target which this handle will control
*/
public void setCameraTarget(final PCamera newCamera, final PNode newTarget) {
camera = newCamera;
camera.addChild(this);
target = newTarget;
}
/** {@inheritDoc} */
public boolean setBounds(final double x, final double y, final double width, final double height) {
final PBounds b = new PBounds(x, y, width, height);
camera.localToGlobal(b);
camera.localToView(b);
target.globalToLocal(b);
target.setBounds(b);
return super.setBounds(x, y, width, height);
}
/**
* Always returns true to ensure that they will always be displayed
* appropriately.
*
* @return true
*/
protected boolean getBoundsVolatile() {
return true;
}
/** {@inheritDoc} */
public PBounds getBoundsReference() {
final PBounds targetBounds = target.getFullBounds();
camera.viewToLocal(targetBounds);
camera.globalToLocal(targetBounds);
final PBounds bounds = super.getBoundsReference();
bounds.setRect(targetBounds);
return super.getBoundsReference();
}
/** {@inheritDoc} */
public void startResizeBounds() {
super.startResizeBounds();
target.startResizeBounds();
}
/** {@inheritDoc} */
public void endResizeBounds() {
super.endResizeBounds();
target.endResizeBounds();
}
/**
* Since PSWTStickyHandle manager is not visible on screen, it just returns
* false when it is asked to be repainted.
*
* @param pickPath path of this node in which the interaction occurred that
* required the repaint
*
* @return always false
*/
public boolean pickAfterChildren(final PPickPath pickPath) {
return false;
}
}
