Bug 166236 [Viewers] ViewerColumn needs a dispose method
ViewerColumn adds a listener to its label provider which is never removed. We need a dispose method that removes the listener. Furthermore, if the column's label provider wraps a non-column-specific label provider, the viewer is already listening to it and the viewer column shouldn't. Must be fixed before the next I build.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerColumn.java
/*******************************************************************************
 * Copyright (c) 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
 *     Tom Shindl <tom.schindl@bestsolution.at> - initial API and implementation
 * 												  fix for bug 163317
 ******************************************************************************/
package org.eclipse.jface.viewers;
import org.eclipse.jface.util.Policy;
import org.eclipse.swt.widgets.Widget;
/**
 * Instances of this class represent a column of a {@link ColumnViewer}. Label
 * providers and editing support can be configured for each column separately.
 * 
 * <strong>EXPERIMENTAL</strong> This class or interface has been added as part
 * of a work in progress. This API may change at any given time. Please do not
 * use this API without consulting with the Platform/UI team.
 * 
 * @since 3.3
 * 
 */
public abstract class ViewerColumn {