| /******************************************************************************* |
| * Copyright (c) 2000, 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.views.framelist; |
| |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.util.IPropertyChangeListener; |
| import org.eclipse.jface.util.PropertyChangeEvent; |
| |
| /** |
| * Abstract superclass for actions dealing with frames or a frame list. |
| * This listens for changes to the frame list and updates itself |
| * accordingly. |
| */ |
| public abstract class FrameAction extends Action { |
| private FrameList frameList; |
| |
| private IPropertyChangeListener propertyChangeListener = new IPropertyChangeListener() { |
| public void propertyChange(PropertyChangeEvent event) { |
| FrameAction.this.handlePropertyChange(event); |
| } |
| }; |
| |
| /** |
| * Constructs a new action for the specified frame list. |
| * and adds a property change listener on it. |
| * |
| * @param frameList the frame list |
| */ |
| protected FrameAction(FrameList frameList) { |
| this.frameList = frameList; |
| frameList.addPropertyChangeListener(propertyChangeListener); |
| } |
| |
| /** |
| * Disposes this frame action. |
| * This implementation removes the property change listener from the frame list. |
| */ |
| public void dispose() { |
| frameList.removePropertyChangeListener(propertyChangeListener); |
| } |
| |
| /** |
| * Returns the frame list. |
| */ |
| public FrameList getFrameList() { |
| return frameList; |
| } |
| |
| /** |
| * Handles a property change event from the frame list. |
| * This implementation calls <code>update()</code>. |
| */ |
| protected void handlePropertyChange(PropertyChangeEvent event) { |
| update(); |
| } |
| |
| /** |
| * Updates this action. This implementation does nothing. |
| * Most implementations will override this method. |
| */ |
| public void update() { |
| } |
| |
| } |