Bug 80793 [Viewers] null image returned from ILabelProvider.getImage should remove any image
I20041208 (-gtk) I have an ILabelProvider which in some cases returns an image in its getImage method, in some cases it does not. If I have once set an image, and then want to remove it, I return null; however, ViewerLabel.hasNewImage treats null as "no change". IMO, if a null image is returned, the viewer should remove the image from the label, alternatively, you could provide a "NullImage" and doc its usage. Currently, there is no way I can remove an image I once set without creating an empty image myself.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerLabel.java
/*******************************************************************************
 * Copyright (c) 2004 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.jface.viewers;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
/**
 * The ViewerLabel is the class that is passed to a viewer to handle updates of
 * labels. It keeps track of both original and updates text.
 * 
 * @see IViewerLabelProvider
 * @since 3.0
 */
public class ViewerLabel {