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/*******************************************************************************
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* Copyright (c) 2000, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package org.eclipse.gef;
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import org.eclipse.jface.action.IMenuListener;
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import org.eclipse.jface.action.IMenuManager;
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import org.eclipse.jface.action.MenuManager;
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/**
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* Extends MenuManager to allow populating the menu directly from the manager
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* itself. Using this class is no different than using a standalone
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* <code>MenuManager</code>, and adding a menuAboutToShow listener.
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*
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* @author hudsonr
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*/
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public abstract class ContextMenuProvider extends MenuManager implements
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IMenuListener {
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private EditPartViewer viewer;
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/**
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* Constructs a context menu for the specified EditPartViewer.
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*
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* @param viewer
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* the editpart viewer
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*/
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public ContextMenuProvider(EditPartViewer viewer) {
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setViewer(viewer);
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addMenuListener(this);
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setRemoveAllWhenShown(true);
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}
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/**
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* Called when the menu is about to show. Subclasses must implement this
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* method to populate the menu each time it is shown.
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*
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* @param menu
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* this parameter is actually <code>this</code> object
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*/
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public abstract void buildContextMenu(IMenuManager menu);
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/**
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* Returns the EditPartViewer
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*
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* @return the viewer
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*/
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protected EditPartViewer getViewer() {
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return viewer;
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}
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/**
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* @see IMenuListener#menuAboutToShow(IMenuManager)
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*/
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public void menuAboutToShow(IMenuManager menu) {
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buildContextMenu(menu);
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}
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/**
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* Sets the editpart viewer. Called during construction.
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*
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* @param viewer
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* the viewer
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*/
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protected void setViewer(EditPartViewer viewer) {
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this.viewer = viewer;
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}
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}
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