| /******************************************************************************* |
| * Copyright (c) 2003, 2010 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.gef.examples.flow.model.commands; |
| |
| import org.eclipse.gef.commands.Command; |
| import org.eclipse.gef.examples.flow.model.Activity; |
| import org.eclipse.gef.examples.flow.model.StructuredActivity; |
| import org.eclipse.gef.examples.flow.model.Transition; |
| |
| /** |
| * SplitTransitionCommand |
| * |
| * @author Daniel Lee |
| */ |
| public class SplitTransitionCommand extends Command { |
| |
| private StructuredActivity parent; |
| private Activity oldSource; |
| private Activity oldTarget; |
| private Transition transition; |
| |
| private Activity newActivity; |
| private Transition newIncomingTransition; |
| private Transition newOutgoingTransition; |
| |
| /** |
| * @see org.eclipse.gef.commands.Command#execute() |
| */ |
| public void execute() { |
| oldSource.removeOutput(transition); |
| oldTarget.removeInput(transition); |
| parent.addChild(newActivity); |
| newIncomingTransition = new Transition(oldSource, newActivity); |
| newOutgoingTransition = new Transition(newActivity, oldTarget); |
| } |
| |
| /** |
| * @see org.eclipse.gef.commands.Command#redo() |
| */ |
| public void redo() { |
| oldSource.addOutput(newIncomingTransition); |
| oldTarget.addInput(newOutgoingTransition); |
| newActivity.addInput(newIncomingTransition); |
| newActivity.addOutput(newOutgoingTransition); |
| parent.addChild(newActivity); |
| oldSource.removeOutput(transition); |
| oldTarget.removeInput(transition); |
| } |
| |
| /** |
| * Sets the parent Activity. The new Activity will be added as a child to |
| * the parent. |
| * |
| * @param activity |
| * the parent |
| */ |
| public void setParent(StructuredActivity activity) { |
| parent = activity; |
| } |
| |
| /** |
| * Sets the transition to be "split". |
| * |
| * @param transition |
| * the transition to be "split". |
| */ |
| public void setTransition(Transition transition) { |
| this.transition = transition; |
| oldSource = transition.source; |
| oldTarget = transition.target; |
| } |
| |
| /** |
| * Sets the Activity to be added. |
| * |
| * @param activity |
| * the new activity |
| */ |
| public void setNewActivity(Activity activity) { |
| newActivity = activity; |
| newActivity.setName("a " + (parent.getChildren().size() + 1)); |
| } |
| |
| /** |
| * @see org.eclipse.gef.commands.Command#undo() |
| */ |
| public void undo() { |
| oldSource.removeOutput(newIncomingTransition); |
| oldTarget.removeInput(newOutgoingTransition); |
| newActivity.removeInput(newIncomingTransition); |
| newActivity.removeOutput(newOutgoingTransition); |
| parent.removeChild(newActivity); |
| oldSource.addOutput(transition); |
| oldTarget.addInput(transition); |
| } |
| |
| } |