| /*=============================================================================# |
| # Copyright (c) 2011, 2021 Stephan Wahlbrink and others. |
| # |
| # This program and the accompanying materials are made available under the |
| # terms of the Eclipse Public License 2.0 which is available at |
| # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 |
| # which is available at https://www.apache.org/licenses/LICENSE-2.0. |
| # |
| # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 |
| # |
| # Contributors: |
| # Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation |
| #=============================================================================*/ |
| |
| package org.eclipse.statet.ecommons.ui.actions; |
| |
| import static org.eclipse.statet.jcommons.lang.ObjectUtils.nonNullAssert; |
| |
| import org.eclipse.core.commands.AbstractHandler; |
| import org.eclipse.core.commands.ExecutionEvent; |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.jface.viewers.AbstractTreeViewer; |
| import org.eclipse.ui.IWorkbenchCommandConstants; |
| |
| import org.eclipse.statet.jcommons.lang.NonNullByDefault; |
| import org.eclipse.statet.jcommons.lang.Nullable; |
| |
| import org.eclipse.statet.ecommons.ui.util.UIAccess; |
| |
| |
| /** |
| * Handler for command {@link IWorkbenchCommandConstants#NAVIGATE_EXPAND_ALL} |
| * for a single tree viewer. |
| */ |
| @NonNullByDefault |
| public class ExpandAllHandler extends AbstractHandler { |
| |
| |
| private @Nullable AbstractTreeViewer viewer; |
| |
| |
| public ExpandAllHandler(final AbstractTreeViewer viewer) { |
| this.viewer= nonNullAssert(viewer); |
| } |
| |
| @Override |
| public void dispose() { |
| this.viewer= null; |
| super.dispose(); |
| } |
| |
| |
| @Override |
| public @Nullable Object execute(final ExecutionEvent event) throws ExecutionException { |
| final AbstractTreeViewer viewer= this.viewer; |
| if (viewer != null && UIAccess.isOkToUse(viewer.getControl())) { |
| viewer.expandAll(); |
| } |
| return null; |
| } |
| |
| } |