RapEventAdapterFactory.java

/*******************************************************************************
 * Copyright (c) 2008 Olivier Moises
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Olivier Moises- initial API and implementation
 *******************************************************************************/

package org.eclipse.wazaabi.engine.rap.events;

import org.eclipse.emf.common.notify.Adapter;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.wazaabi.engine.core.editparts.AbstractWidgetEditPart;
import org.eclipse.wazaabi.engine.core.editparts.WidgetEditPart;
import org.eclipse.wazaabi.engine.edp.adapters.EventAdapter;
import org.eclipse.wazaabi.engine.edp.adapters.EventHandlerAdapter;
import org.eclipse.wazaabi.engine.edp.events.EventAdapterFactory;
import org.eclipse.wazaabi.engine.rap.viewers.RapControlViewer;
import org.eclipse.wazaabi.engine.swt.commons.viewers.AbstractSWTViewer;
import org.eclipse.wazaabi.mm.edp.events.Event;

public class RapEventAdapterFactory implements EventAdapterFactory {

	public boolean isFactoryFor(Object context, Object source, Object creationHint) {
		if (source instanceof Event
				&& getAbstractSWTViewer(context) instanceof RapControlViewer) {
			return true;
		}
		return false;
	}

	public String getFactoryID() {
		return getClass().getName();
	}

	public EventAdapter createEventAdapter(Object context, Event event) {
		// if (event is ui event) ...
		if (context instanceof EventHandlerAdapter
				&& ((EventHandlerAdapter) context).getEventDispatcherAdapter() instanceof WidgetEditPart)
			return new RapUIEventAdapter();
		return null;
	}

	/**
	 * Returns the AbstractSWTControlViewer associated to this context (here,
	 * the context is supposed to be an EventHandlerAdapter. Returns null if no
	 * viewer can be found.
	 * 
	 * @param context
	 * @return
	 */
	private AbstractSWTViewer getAbstractSWTViewer(Object context) {
		if (context instanceof EventHandlerAdapter
				&& ((EventHandlerAdapter) context).getEventDispatcherAdapter() instanceof AbstractWidgetEditPart
				&& ((AbstractWidgetEditPart) ((EventHandlerAdapter) context)
						.getEventDispatcherAdapter()).getViewer() instanceof AbstractSWTViewer)
			return (AbstractSWTViewer) ((AbstractWidgetEditPart) ((EventHandlerAdapter) context)
					.getEventDispatcherAdapter()).getViewer();
		return null;
	}

	public Adapter createAdapter(Object context, EObject model, Object creationHint) {
		if (context instanceof EventHandlerAdapter
				&& ((EventHandlerAdapter) context).getEventDispatcherAdapter() instanceof WidgetEditPart)
			return new RapUIEventAdapter();
		return null;
	}
}