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/*******************************************************************************
 * Copyright (c) 2004, 2006 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;

/**
 * Extends IBaseLabelProvider with the methods
 * to update the label for a given element.  The label is represented by a 
 * ViewerLabel.
 * Unlike ILabelProvider, this allows the text and image to be
 * set in the same request, rather than via separate requests.  
 * 
 * It also allows the current values for the text and image to be considered by 
 * the label provider, allowing for potential optimizations.
 * For example, decorating label providers that run in the background can hold off
 * applying an update to a previously populated label until the decoration is ready,
 * thereby reducing flicker.
 * 
 * 
 * @see IDelayedLabelDecorator
 * @since 3.0
 */
public interface IViewerLabelProvider extends IBaseLabelProvider {

    /**
     * Updates the label for the given element.
     * 
     * @param label the label to update
     * @param element the element
     */
    public void updateLabel(ViewerLabel label, Object element);
}