| /******************************************************************************* |
| * 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.osgi.util.NLS; |
| import org.eclipse.ui.ISharedImages; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.internal.views.framelist.FrameListMessages; |
| |
| /** |
| * Generic "Back" action which goes back one frame, |
| */ |
| public class BackAction extends FrameAction { |
| |
| /** |
| * Constructs a new action for the specified frame list. |
| * |
| * @param frameList the frame list |
| */ |
| public BackAction(FrameList frameList) { |
| super(frameList); |
| setText(FrameListMessages.Back_text); |
| ISharedImages images = PlatformUI.getWorkbench().getSharedImages(); |
| setImageDescriptor(images |
| .getImageDescriptor(ISharedImages.IMG_TOOL_BACK)); |
| setDisabledImageDescriptor(images |
| .getImageDescriptor(ISharedImages.IMG_TOOL_BACK_DISABLED)); |
| PlatformUI.getWorkbench().getHelpSystem().setHelp(this, |
| IFrameListHelpContextIds.BACK_ACTION); |
| update(); |
| } |
| |
| private Frame getPreviousFrame() { |
| FrameList list = getFrameList(); |
| return list.getFrame(list.getCurrentIndex() - 1); |
| } |
| |
| private String getToolTipText(Frame previousFrame) { |
| if (previousFrame != null) { |
| String text = previousFrame.getToolTipText(); |
| if (text != null && text.length() > 0) { |
| return NLS.bind(FrameListMessages.Back_toolTipOneArg, text); |
| } |
| } |
| return FrameListMessages.Back_toolTip; |
| } |
| |
| /** |
| * Calls <code>back()</code> on the frame list. |
| */ |
| public void run() { |
| getFrameList().back(); |
| } |
| |
| /** |
| * Updates this action's enabled state and tool tip text. |
| * This action is enabled only when there is a previous frame in the frame list. |
| * The tool tip text is "Back to " plus the tool tip text for the previous frame. |
| */ |
| public void update() { |
| super.update(); |
| Frame previousFrame = getPreviousFrame(); |
| setEnabled(previousFrame != null); |
| setToolTipText(getToolTipText(previousFrame)); |
| } |
| |
| } |