| /******************************************************************************* |
| * Copyright (c) 2005 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.ui.examples.undo; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.core.commands.operations.IUndoContext; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.swt.widgets.Canvas; |
| |
| /** |
| * An operation that adds a box. |
| */ |
| public class ClearBoxesOperation extends BoxOperation { |
| |
| /* |
| * The boxes that are saved after clearing |
| */ |
| private List savedBoxes = new ArrayList(); |
| |
| public ClearBoxesOperation(String label, IUndoContext context, Boxes boxes, Canvas canvas) { |
| super(label, context, boxes, null, canvas); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * @see org.eclipse.core.commands.operations.IUndoableOperation#execute(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable) |
| */ |
| public IStatus execute(IProgressMonitor monitor, IAdaptable info) |
| throws ExecutionException { |
| savedBoxes = boxes.getBoxes(); |
| boxes.clear(); |
| canvas.redraw(); |
| return Status.OK_STATUS; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * @see org.eclipse.core.commands.operations.IUndoableOperation#redo(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable) |
| */ |
| public IStatus redo(IProgressMonitor monitor, IAdaptable info) |
| throws ExecutionException { |
| return execute(monitor, info); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * @see org.eclipse.core.commands.operations.IUndoableOperation#undo(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.core.runtime.IAdaptable) |
| */ |
| public IStatus undo(IProgressMonitor monitor, IAdaptable info) |
| throws ExecutionException { |
| boxes.setBoxes(savedBoxes); |
| canvas.redraw(); |
| return Status.OK_STATUS; |
| } |
| |
| } |