| /******************************************************************************* |
| * Copyright (c) 2005, 2006 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 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 AddBoxOperation extends BoxOperation { |
| |
| /** |
| * Create a box |
| * @param label |
| * @param context |
| * @param boxes |
| * @param box |
| * @param canvas |
| */ |
| public AddBoxOperation(String label, IUndoContext context, Boxes boxes, Box box, Canvas canvas) { |
| super(label, context, boxes, box, canvas); |
| } |
| |
| public IStatus execute(IProgressMonitor monitor, IAdaptable info) { |
| boxes.add(box); |
| canvas.redraw(box.x1, box.y1, box.x2, box.y2, false); |
| return Status.OK_STATUS; |
| } |
| |
| public boolean canUndo() { |
| return boxes.contains(box); |
| } |
| |
| public IStatus undo(IProgressMonitor monitor, IAdaptable info) { |
| boxes.remove(box); |
| canvas.redraw(box.x1, box.y1, box.x2, box.y2, false); |
| return Status.OK_STATUS; |
| } |
| |
| public boolean canRedo() { |
| return !boxes.contains(box); |
| } |
| public IStatus redo(IProgressMonitor monitor, IAdaptable info) { |
| return execute(monitor, info); |
| } |
| |
| |
| |
| } |