/*****************************************************************************
* Copyright (c) 2010 CEA LIST.
*
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Patrick Tessier (CEA LIST) Patrick.tessier@cea.fr - Initial API and implementation
*/
package org.eclipse.papyrus.uml.diagram.activity.edit.policies;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.gef.RequestConstants;
import org.eclipse.gef.requests.ChangeBoundsRequest;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.ResizableShapeEditPolicy;
import org.eclipse.papyrus.uml.diagram.common.editparts.UMLNodeEditPart;
/**
* A resizable editpolicy for shape editparts. It ensure that the resize keeps
* the shape as a fork or a join
*
* @see ResizableShapeEditPolicy
*/
public class ForkJoinResizeEditPolicy extends ResizableShapeEditPolicy {
/**
* Shows or updates feedback for a change bounds request. The request is
* updated by the way so that the shape stays a square.
*
* @param request
* the request
*/
@Override
protected void showChangeBoundsFeedback(ChangeBoundsRequest request) {
// adapt the request for a square resize
if(request.getType().equals(RequestConstants.REQ_RESIZE) && getHost() instanceof UMLNodeEditPart) {
Dimension dim = getHostFigure().getBounds().getSize();
Dimension preferedDim = ((UMLNodeEditPart)getHost()).getPrimaryShape().getPreferredSize();
Dimension delta = request.getSizeDelta();
int dH = delta.height;
int dW = delta.width;
if(dH > dW) {
dW = preferedDim.width - dim.width;
} else {
dH = preferedDim.height - dim.height;
}
request.setSizeDelta(new Dimension(dW, dH));
}
super.showChangeBoundsFeedback(request);
}
}