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/*******************************************************************************
* Copyright (c) 2003, 2005 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 API and implementation
*******************************************************************************/
package org.eclipse.jst.server.ui.internal;
import java.net.URL;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import org.eclipse.swt.graphics.Image;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
/**
* Utility class to handle image resources.
*/
public class ImageResource {
// the image registry
private static ImageRegistry imageRegistry;
// map of image descriptors since these
// will be lost by the image registry
private static Map imageDescriptors;
// map of IElement images
private static Map elementImages;
// base urls for images
private static URL ICON_BASE_URL;
static {
try {
String pathSuffix = "icons/";
ICON_BASE_URL = JavaServerUIPlugin.getInstance().getBundle().getEntry(pathSuffix);
} catch (Exception e) {
Trace.trace(Trace.SEVERE, "Could not set icon base URL", e);
}
}
private static final String URL_WIZBAN = "wizban/";
protected static final String IMG_WIZ_RUNTIME_TYPE = "wiz_runtimeType";
public static final String IMG_WIZ_CACTUS_TEST = "wiz_cactus_test";
/**
* Cannot construct an ImageResource. Use static methods only.
*/
private ImageResource() {
// do nothing
}
/**
* Dispose of element images that were created.
*/
protected static void dispose() {
try {
Trace.trace(Trace.FINEST, "Disposing of element images");
Iterator iterator = elementImages.values().iterator();
while (iterator.hasNext()) {
Image image = (Image) iterator.next();
image.dispose();
}
} catch (Exception e) {
Trace.trace(Trace.WARNING, "Could not dispose of images");
}
}
/**
* Return the image with the given key.
*
* @param key java.lang.String
* @return org.eclipse.swt.graphics.Image
*/
public static Image getImage(String key) {
if (imageRegistry == null)
initializeImageRegistry();
return imageRegistry.get(key);
}
/**
* Return the image descriptor with the given key.
*
* @param key java.lang.String
* @return org.eclipse.jface.resource.ImageDescriptor
*/
public static ImageDescriptor getImageDescriptor(String key) {
if (imageRegistry == null)
initializeImageRegistry();
return (ImageDescriptor) imageDescriptors.get(key);
}
/**
* Initialize the image resources.
*/
protected static void initializeImageRegistry() {
imageRegistry = new ImageRegistry();
imageDescriptors = new HashMap();
registerImage(IMG_WIZ_RUNTIME_TYPE, URL_WIZBAN + "new_runtime_wiz.gif");
registerImage(IMG_WIZ_CACTUS_TEST, URL_WIZBAN + "new_test_wiz.gif");
}
/**
* Register an image with the registry.
*
* @param key java.lang.String
* @param partialURL java.lang.String
*/
private static void registerImage(String key, String partialURL) {
try {
ImageDescriptor id = ImageDescriptor.createFromURL(new URL(ICON_BASE_URL, partialURL));
imageRegistry.put(key, id);
imageDescriptors.put(key, id);
} catch (Exception e) {
Trace.trace(Trace.WARNING, "Error registering image " + key + " from " + partialURL, e);
}
}
}
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