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

/************************************************************************
Copyright (c) 2000, 2002 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 - Initial 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 {
		private Menu menu;
		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;
	}
}