Activator.java

/*******************************************************************************
 * Copyright (c) 2010 protos software gmbh (http://www.protos.de).
 * 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:
 * 		Thomas Schuetz and Henrik Rentz-Reichert (initial contribution)
 * 
 *******************************************************************************/

package org.eclipse.etrice.ui.structure;

import org.osgi.framework.BundleContext;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;

public class Activator extends AbstractUIPlugin {

	// The shared instance
	private static Activator plugin;

	// The plug-in ID
	public static final String PLUGIN_ID = "org.eclipse.etrice.ui.structure";

	private ImageRegistry imageRegistry = new ImageRegistry();
	
	/*
	 * (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
	}

	/*
	 * (non-Javadoc)
	 * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		plugin.imageRegistry.dispose();
		plugin = null;
		super.stop(context);
	}

	/**
	 * Returns the shared instance
	 *
	 * @return the shared instance
	 */
	public static Activator getDefault() {
		return plugin;
	}

	/**
	 * Returns an image descriptor for the image file at the given
	 * plug-in relative path
	 *
	 * @param path
	 *            the path
	 * @return the image descriptor
	 */
	public static Image getImage(String path) {
		Image img = getDefault().imageRegistry.get(path);
		if (img==null) {
			ImageDescriptor desc = imageDescriptorFromPlugin(PLUGIN_ID, path);
			if (desc==null)
				System.err.println("image not found: "+path);
			else {
				getDefault().imageRegistry.put(path, desc);
				getDefault().imageRegistry.get(path);
			}
		}
		return img;
	}

}