/*******************************************************************************
* Copyright (c) 2004, 2005 Elias Volanakis and others.
�* 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:
�*����Elias Volanakis - initial API and implementation
�*******************************************************************************/
package com.windowtester.internal.customer.cat.shapes.model.commands;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.RequestConstants;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.requests.ChangeBoundsRequest;
import com.windowtester.internal.customer.cat.shapes.model.Shape;
/**
* A command to resize and/or move a shape.
* The command can be undone or redone.
* @author Elias Volanakis
*/
public class ShapeSetConstraintCommand extends Command {
/** Stores the new size and location. */
private final Rectangle newBounds;
/** Stores the old size and location. */
private Rectangle oldBounds;
/** A request to move/resize an edit part. */
private final ChangeBoundsRequest request;
/** Shape to manipulate. */
private final Shape shape;
/**
* Create a command that can resize and/or move a shape.
* @param shape the shape to manipulate
* @param req the move and resize request
* @param newBounds the new size and location
* @throws IllegalArgumentException if any of the parameters is null
*/
public ShapeSetConstraintCommand(Shape shape, ChangeBoundsRequest req,
Rectangle newBounds) {
if (shape == null || req == null || newBounds == null) {
throw new IllegalArgumentException();
}
this.shape = shape;
this.request = req;
this.newBounds = newBounds.getCopy();
setLabel("move / resize");
}
/* (non-Javadoc)
* @see org.eclipse.gef.commands.Command#canExecute()
*/
public boolean canExecute() {
Object type = request.getType();
// make sure the Request is of a type we support:
return (RequestConstants.REQ_MOVE.equals(type)
|| RequestConstants.REQ_MOVE_CHILDREN.equals(type)
|| RequestConstants.REQ_RESIZE.equals(type)
|| RequestConstants.REQ_RESIZE_CHILDREN.equals(type));
}
/* (non-Javadoc)
* @see org.eclipse.gef.commands.Command#execute()
*/
public void execute() {
oldBounds = new Rectangle(shape.getLocation(), shape.getSize());
redo();
}
/* (non-Javadoc)
* @see org.eclipse.gef.commands.Command#redo()
*/
public void redo() {
shape.setSize(newBounds.getSize());
shape.setLocation(newBounds.getLocation());
}
/* (non-Javadoc)
* @see org.eclipse.gef.commands.Command#undo()
*/
public void undo() {
shape.setSize(oldBounds.getSize());
shape.setLocation(oldBounds.getLocation());
}
}