/*
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.eclipse.editors.rete.commands;
import org.drools.eclipse.reteoo.BaseVertex;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.RequestConstants;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.requests.ChangeBoundsRequest;
/**
* A command to move a vertex.
*/
public class NodeSetConstraintCommand 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;
/** BaseVertex to manipulate. */
private final BaseVertex vertex;
/**
* Create a command that can resize and/or move a vertex.
*
* @param vertex the vertex to manipulate
* @param req the move request
* @param newBounds the new location. size is ignored
* @throws IllegalArgumentException if any of the parameters is null
*/
public NodeSetConstraintCommand(BaseVertex vertex,
ChangeBoundsRequest req,
Rectangle newBounds) {
if ( vertex == null || req == null || newBounds == null ) {
throw new IllegalArgumentException();
}
this.vertex = vertex;
this.request = req;
this.newBounds = newBounds.getCopy();
}
/* (non-Javadoc)
* @see org.eclipse.gef.commands.Command#canExecute()
*/
public boolean canExecute() {
Object type = request.getType();
return (RequestConstants.REQ_MOVE.equals( type ) || RequestConstants.REQ_MOVE_CHILDREN.equals( type ));
}
/* (non-Javadoc)
* @see org.eclipse.gef.commands.Command#execute()
*/
public void execute() {
oldBounds = new Rectangle( vertex.getLocation(),
vertex.getSize() );
redo();
}
/* (non-Javadoc)
* @see org.eclipse.gef.commands.Command#redo()
*/
public void redo() {
vertex.setSize( newBounds.getSize() );
vertex.setLocation( newBounds.getLocation() );
}
/* (non-Javadoc)
* @see org.eclipse.gef.commands.Command#undo()
*/
public void undo() {
vertex.setSize( oldBounds.getSize() );
vertex.setLocation( oldBounds.getLocation() );
}
}