Bug 166383 [Viewers] Provide Tabing from Editor to Editor
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ColumnViewer.java
*
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation; bug 153993
												   fix in bug 163317
 ******************************************************************************/
package org.eclipse.jface.viewers;
import org.eclipse.core.runtime.Assert;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.Widget;
/**
 * The ColumnViewer is the abstract superclass of viewers that have columns
 * (e.g., AbstractTreeViewer and AbstractTableViewer). Concrete subclasses of
 * {@link ColumnViewer} should implement a matching concrete subclass of
 * {@link ViewerColumn}.
 * 
 * <strong> This class is not intended to be subclassed outside of the JFace
 * viewers framework.</strong>
 * 
 * @since 3.3 <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.
 * 
 */
public abstract class ColumnViewer extends StructuredViewer {