| /******************************************************************************* |
| * 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.debug.internal.ui.actions; |
| |
| |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| import org.eclipse.swt.custom.BusyIndicator; |
| |
| /** |
| * A generic Toggle filter action, meant to be subclassed to provide |
| * a specific filter. |
| */ |
| public abstract class ToggleFilterAction extends Action { |
| |
| /** |
| * The viewer that this action works for |
| */ |
| private StructuredViewer fViewer; |
| |
| /** |
| * The filter this action applies to the viewer |
| */ |
| private ViewerFilter fViewerFilter; |
| |
| public void run() { |
| valueChanged(isChecked()); |
| } |
| /** |
| * Adds or removes the viewer filter depending |
| * on the value of the parameter. |
| */ |
| protected void valueChanged(final boolean on) { |
| if (getViewer().getControl().isDisposed()) { |
| return; |
| } |
| BusyIndicator.showWhile(getViewer().getControl().getDisplay(), new Runnable() { |
| public void run() { |
| if (on) { |
| ViewerFilter filter= getViewerFilter(); |
| ViewerFilter[] filters= getViewer().getFilters(); |
| boolean alreadyAdded= false; |
| for (int i= 0; i < filters.length; i++) { |
| ViewerFilter addedFilter= filters[i]; |
| if (addedFilter.equals(filter)) { |
| alreadyAdded= true; |
| break; |
| } |
| } |
| if (!alreadyAdded) { |
| getViewer().addFilter(filter); |
| } |
| |
| } else { |
| getViewer().removeFilter(getViewerFilter()); |
| } |
| } |
| }); |
| } |
| |
| /** |
| * Returns the <code>ViewerFilter</code> that this action |
| * will add/remove from the viewer, or <code>null</code> |
| * if no filter is involved. |
| */ |
| protected ViewerFilter getViewerFilter() { |
| return fViewerFilter; |
| } |
| |
| protected void setViewerFilter(ViewerFilter filter) { |
| fViewerFilter= filter; |
| } |
| |
| protected StructuredViewer getViewer() { |
| return fViewer; |
| } |
| |
| protected void setViewer(StructuredViewer viewer) { |
| fViewer = viewer; |
| } |
| } |