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

/*******************************************************************************
 * Copyright (c) 2000, 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.core.runtime.IConfigurationElement;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.*;

/**
 * A workbench window pulldown action.  
 */
public class WWinPluginPulldown extends WWinPluginAction {
	private IMenuCreator menuProxy;
	private class MenuProxy implements IMenuCreator {
		public Menu getMenu(Control parent) {
			IWorkbenchWindowPulldownDelegate delegate = getPulldownDelegate();
			if (delegate != null) {
				return delegate.getMenu(parent);
			} else {
				return null;
			}
		}
		public Menu getMenu(Menu parent) {
			IWorkbenchWindowPulldownDelegate delegate = getPulldownDelegate();
			if (delegate instanceof IWorkbenchWindowPulldownDelegate2) {
				IWorkbenchWindowPulldownDelegate2 delegate2 = (IWorkbenchWindowPulldownDelegate2) delegate;
				return delegate2.getMenu(parent);
			}
			return null;
		}
		public void dispose() {
		}
	};
	
	/**
	 * WWinPluginPulldown constructor comment.
	 * @param actionElement org.eclipse.core.runtime.IConfigurationElement
	 * @param runAttribute java.lang.String
	 * @param window org.eclipse.ui.IWorkbenchWindow
	 */
	public WWinPluginPulldown(IConfigurationElement actionElement, String runAttribute, IWorkbenchWindow window, String definitionId, int style) {
		super(actionElement, runAttribute, window, definitionId, style);
		menuProxy = new MenuProxy();
		setMenuCreator(menuProxy);
	}

	/* (non-Javadoc)
	 * Method declared on PluginAction.
	 */
	protected IActionDelegate validateDelegate(Object obj) throws WorkbenchException {
		if (obj instanceof IWorkbenchWindowPulldownDelegate)
			return (IWorkbenchWindowPulldownDelegate)obj;
		else
			throw new WorkbenchException("Action must implement IWorkbenchWindowPulldownDelegate"); //$NON-NLS-1$
	}

	/**
	 * Returns the pulldown delegate.  If it does not exist it is created.
	 */
	protected IWorkbenchWindowPulldownDelegate getPulldownDelegate() {
		IActionDelegate delegate = getDelegate();
		if (delegate == null) {
			createDelegate();
			delegate = getDelegate();
		}
		return (IWorkbenchWindowPulldownDelegate) delegate;
	}
}