//------------------------------------------------------------------------------
// Copyright (c) 2005, 2007 IBM Corporation and others.
// 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:
// IBM Corporation - initial implementation
//------------------------------------------------------------------------------
/**
 * 
 */
package org.eclipse.epf.diagram.core.actions;

import org.eclipse.epf.diagram.core.part.AbstractDiagramEditor;
import org.eclipse.gmf.runtime.diagram.ui.parts.IDiagramWorkbenchPart;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

/**
 * Refresh action refreshes the DiagramEditPart, performs deactivate and activate. 
 * 
 * @author Shashidhar Kannoori
 * @author Phong Nguyen Le
 */
public class RefreshAction implements IObjectActionDelegate {
	private IDiagramWorkbenchPart activePart;

	public RefreshAction() {
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface.action.IAction, org.eclipse.ui.IWorkbenchPart)
	 */
	public void setActivePart(IAction action, IWorkbenchPart targetPart) {
		if(targetPart instanceof IDiagramWorkbenchPart) {
			activePart = ((IDiagramWorkbenchPart)targetPart);
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
	 */
	public void run(IAction action) {
		if(activePart != null) {
			if(activePart instanceof AbstractDiagramEditor) {
				AbstractDiagramEditor editor = ((AbstractDiagramEditor)activePart); 
				editor.refresh();
			}
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection)
	 */
	public void selectionChanged(IAction action, ISelection selection) {
	}

}