/*******************************************************************************
 * Copyright (c) 2007- VTT Technical Research Centre of Finland.
 * 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:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.proconf.g3d.base;

import org.eclipse.ui.IPartListener;
import org.eclipse.ui.IWorkbenchPart;

/**
 * IPartListener that allows editor to load its content after the editorPart is activated.
 * 
 * This is crucial with 3D graphics, which does not work if the editor part is activated
 * after the data has been loaded.
 * 
 * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
 *
 */
public abstract class EditorLoader implements IPartListener {

	boolean opened = false;
	boolean activated = false;
	
    public void partOpened(IWorkbenchPart part) {
        if (part.equals(getWorkbechPart())) {
            opened = true;
        }
    }
    
    public void partActivated(IWorkbenchPart part) {
    	if (part.equals(getWorkbechPart())) {
            if (opened & !activated) {
            	activated = true;
            	load();
            }
    	}
    }
    
    public void partBroughtToTop(IWorkbenchPart part) {}
    
    public void partClosed(IWorkbenchPart part) {}
    
    public void partDeactivated(IWorkbenchPart part) {}
    
    /**
     * Returns the IWorkbenchPart of the editor
     * @return
     */
    public abstract IWorkbenchPart getWorkbechPart();
    
    /**
     * Starts the content loading process
     */
    public abstract void load();
}