/*******************************************************************************
 * Copyright (c) 2000, 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
 *******************************************************************************/
package org.eclipse.gef.ui.stackview;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.TreeViewer;

/**
 * An internal class for the command stack inspector tool.
 * 
 * @deprecated since 3.1
 */
public class CommandStackViewerAction extends Action {

	/** The TreeViewer associated with this CommandStackViewerAction **/
	protected TreeViewer viewer;

	/**
	 * Creates a new CommandStackViewerAction with the given TreeViewer
	 * 
	 * @param viewer
	 *            the TreeViewer
	 */
	public CommandStackViewerAction(TreeViewer viewer) {
		super("Toggle Debug Labels", //$NON-NLS-1$
				ImageDescriptor.createFromFile(CommandStackInspector.class,
						"icons/stackDebug.gif"));//$NON-NLS-1$

		this.viewer = viewer;
		setChecked(((TreeLabelProvider) viewer.getLabelProvider())
				.getLabelStyle() == TreeLabelProvider.DEBUG_LABEL_STYLE);
	}

	/**
	 * @see Action#run()
	 */
	public void run() {
		if (viewer == null)
			return;
		TreeLabelProvider labelProvider = (TreeLabelProvider) viewer
				.getLabelProvider();
		if (!isChecked()) {
			labelProvider.setLabelStyle(TreeLabelProvider.NORMAL_LABEL_STYLE);
		} else {
			labelProvider.setLabelStyle(TreeLabelProvider.DEBUG_LABEL_STYLE);
		}
		viewer.refresh();
	}

}
