Eclipse Image/Overlay Helper

gistfile1.java

public class AEclipsePluginImages{
	

	private final static ImageRegistry PLUGIN_REGISTRY = new ImageRegistry();
	public final static String ICONS_PATH = "icons/"; //$NON-NLS-1$
	private static final String PATH_OBJ = ICONS_PATH + "obj16/"; //$NON-NLS-1$
	private static final String PATH_LCL = ICONS_PATH + "elcl16/"; //$NON-NLS-1$
	private static final String PATH_LCL_DISABLED = ICONS_PATH + "dlcl16/"; //$NON-NLS-1$

	public static final ImageDescriptor DESC_MODEL_OVERVIEW = create(PATH_OBJ,
			"some_obj.gif"); //$NON-NLS-1$
	//..... rest of default image descriptors

	private static ImageDescriptor create(String prefix, String name) {
		return ImageDescriptor.createFromURL(makeImageURL(prefix, name));
	}

	public static ImageDescriptor createOverlay(ImageDescriptor base,
			ImageDescriptor overlay, int quadrant) {
		return new DecorationOverlayIcon(getImage(base), overlay, quadrant);
	}

	private static URL makeImageURL(String prefix, String name) {
		String path = "$nl$/" + prefix + name; //$NON-NLS-1$
		return FileLocator.find(APDEditorPlugin.getDefault().getBundle(),
				new Path(path), null);
	}

	public static Image getImage(ImageDescriptor desc) {
		String key = String.valueOf(desc.hashCode());
		Image image = PLUGIN_REGISTRY.get(key);
		if (image == null) {
			image = desc.createImage();
			PLUGIN_REGISTRY.put(key, image);
		}
		return image;
	}
}