bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/MaximizePartAction.java

/*******************************************************************************
 * Copyright (c) 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.internal;

import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPartReference;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.help.WorkbenchHelp;

/**
 * Toggles the maximize/restore state of the active part, if there is one.
 */
public class MaximizePartAction extends PageEventAction {

	/**
	 * Creates a MaximizePartAction.
	 */
	public MaximizePartAction(IWorkbenchWindow window) {
		super(WorkbenchMessages.getString("MaximizePartAction.text"), window); //$NON-NLS-1$
		setToolTipText(WorkbenchMessages.getString("MaximizePartAction.toolTip")); //$NON-NLS-1$
		// @issue missing action id
		updateState();
		WorkbenchHelp.setHelp(this, IHelpContextIds.MAXIMIZE_PART_ACTION);
		setActionDefinitionId("org.eclipse.ui.window.maximizePart"); //$NON-NLS-1$
	}
	
	/* (non-Javadoc)
	 * Method declared on PageEventAction.
	 */
	public void pageActivated(IWorkbenchPage page) {
		super.pageActivated(page);
		updateState();
	}
	
	/* (non-Javadoc)
	 * Method declared on PageEventAction.
	 */
	public void pageClosed(IWorkbenchPage page) {
		super.pageClosed(page);
		updateState();
	}
	
	/* (non-Javadoc)
	 * Method declared on IAction.
	 */
	public void run() {
		if (getWorkbenchWindow() == null) {
			// action has been dispose
			return;
		}
		IWorkbenchPage page = getActivePage();
		if (page != null) {
			IWorkbenchPartReference partRef = page.getActivePartReference();
			if (partRef != null) {
				((WorkbenchPage) page).toggleZoom(partRef);
			}
		}
	}
	
	/**
	 * Updates the enabled state.
	 */
	private void updateState() {
		setEnabled(getActivePage() != null);
	}
}