bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/presentations/SystemMenuClose.java

/*******************************************************************************
 * Copyright (c) 2004 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.presentations;

import org.eclipse.jface.action.Action;
import org.eclipse.ui.internal.WorkbenchMessages;
import org.eclipse.ui.presentations.IPresentablePart;
import org.eclipse.ui.presentations.IStackPresentationSite;

/**
 * This convenience class provides a "close" system menu item that closes
 * the currently selected pane in a presentation. Presentations can use
 * this to add a close item to their system menu.
 * 
 * @since 3.0
 */
public final class SystemMenuClose extends Action implements ISelfUpdatingAction {

    private IStackPresentationSite site;

    public SystemMenuClose(IStackPresentationSite site) {
    	this.site = site;
    	setText(WorkbenchMessages.getString("PartPane.close")); //$NON-NLS-1$
    }

    public void dispose() {
    	site = null;
    }
    
    public void run() {
    	IPresentablePart part = site.getSelectedPart();
    	if (part != null) {
    		site.close(new IPresentablePart[]{part});
    	}
    }
    
    public void update() {
    	IPresentablePart presentablePart = site.getSelectedPart();
    	setEnabled(presentablePart != null && site.isCloseable(presentablePart));
    }
    
    public boolean shouldBeVisible() {
    	return true;
    }
}