| /******************************************************************************* |
| * Copyright (c) 2008, 2010 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 |
| * |
| * @author Prakash G. R. |
| ******************************************************************************/ |
| |
| package org.eclipse.ui.handlers; |
| import org.eclipse.core.commands.AbstractHandler; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.jface.viewers.AbstractTreeViewer; |
| import org.eclipse.ui.IWorkbenchCommandConstants; |
| |
| /** |
| * Expand a tree viewer. |
| * <p> |
| * It can be used in a part's createPartControl(Composite) method: |
| * |
| * <pre> |
| * IHandlerService handlerService = (IHandlerService) getSite().getService( |
| * IHandlerService.class); |
| * expandHandler = new ExpandAllHandler(myViewer); |
| * handlerService.activateHandler(ExpandAllHandler.COMMAND_ID, expandHandler); |
| * </pre> |
| * |
| * The part should dispose the handler in its own dispose() method. The part can |
| * provide its own expand all handler if desired, or if it needs to delegate to |
| * multiple tree viewers. |
| * </p> |
| * <p> |
| * <b>Note</b>: This class can be instantiated. It should not be subclasses. |
| * </p> |
| * |
| * @since 3.6 |
| */ |
| public class ExpandAllHandler extends AbstractHandler { |
| /** |
| * The command id for collapse all. |
| */ |
| public static final String COMMAND_ID = IWorkbenchCommandConstants.NAVIGATE_EXPAND_ALL; |
| |
| private AbstractTreeViewer treeViewer; |
| |
| /** |
| * Create the handler for this tree viewer. |
| * |
| * @param viewer |
| * The viewer to expand. Must not be <code>null</code>. |
| */ |
| public ExpandAllHandler(AbstractTreeViewer viewer) { |
| Assert.isNotNull(viewer); |
| treeViewer = viewer; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent) |
| */ |
| public Object execute(ExecutionEvent event) { |
| treeViewer.expandAll(); |
| return null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.commands.AbstractHandler#dispose() |
| */ |
| public void dispose() { |
| treeViewer = null; |
| } |
| } |