/*******************************************************************************
* Copyright 2017 Capital One Services, LLC and Bitwise, Inc.
* 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 hydrograph.ui.menus.handlers;
import hydrograph.ui.graph.editor.ELTGraphicalEditor;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.handlers.HandlerUtil;
/**
* The Class UndoHandler.
* <p>
* Handler for Undo functionality in the canvas.
*
* @author Bitwise
*/
public class UndoHandler extends AbstractHandler implements IHandler{
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
IEditorPart editor = HandlerUtil.getActiveEditor(event);
if(editor instanceof ELTGraphicalEditor)((ELTGraphicalEditor)editor).undoSelection();
return null;
}
}