/*
* Copyright (c) 2012, 2013 Hemanta Sapkota.
* 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:
* Hemanta Sapkota (laex.pearl@gmail.com)
*/
package com.laex.cg2d.screeneditor.commands;
import org.eclipse.gef.commands.Command;
import com.laex.cg2d.model.model.Layer;
import com.laex.cg2d.model.model.ShapesDiagram;
/**
* The Class LayerChangeOrderCommand.
*/
public class LayerChangeOrderCommand extends Command {
/** The diagram. */
private ShapesDiagram diagram;
/** The layers. */
private Layer[] layers;
/**
* Instantiates a new layer change order command.
*
* @param diagram
* the diagram
* @param layers
* the layers
*/
public LayerChangeOrderCommand(ShapesDiagram diagram, Layer[] layers) {
this.diagram = diagram;
this.layers = layers;
setLabel("Change layer order");
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.commands.Command#canExecute()
*/
@Override
public boolean canExecute() {
return (layers != null) && (diagram != null);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.commands.Command#canUndo()
*/
@Override
public boolean canUndo() {
return false;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.commands.Command#execute()
*/
@Override
public void execute() {
redo();
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.commands.Command#redo()
*/
@Override
public void redo() {
// clear the layers
diagram.getLayers().clear();
// add the layers in the specified order
for (Layer o : layers) {
diagram.getLayers().add(o);
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.commands.Command#undo()
*/
@Override
public void undo() {
}
}