Bug 198089 [ToolTips] Open/Add new API for ToolTips
- don't make shouldCreateToolTip final - add new API method ColumnViewerToolTipSupport#createToolTipContentArea(Event, Object, Composite) - Allow DefaultToolTips displayed more than once (For ToolTips in ToolTips).
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ColumnViewerToolTipSupport.java
*/
	protected ColumnViewerToolTipSupport(ColumnViewer viewer, int style, boolean manualActivation ) {
		super(viewer.getControl(),style,manualActivation);
		this.viewer = viewer;
	}
	/**
	 * Enable ToolTip support for the viewer by creating an instance from this
	 * class. To get all necessary informations this support class consults the
	 * {@link CellLabelProvider}.
	 *
	 * @param viewer
	 *            the viewer the support is attached to
	 */
	public static void enableFor(ColumnViewer viewer) {
		new ColumnViewerToolTipSupport(viewer,ToolTip.NO_RECREATE,false);
	}
	/**
	 * Enable ToolTip support for the viewer by creating an instance from this
	 * class. To get all necessary informations this support class consults the
	 * {@link CellLabelProvider}.
	 *
	 * @param viewer
	 *            the viewer the support is attached to
	 * @param style style passed to control tool tip behavior
	 *
	 * @see ToolTip#RECREATE
	 * @see ToolTip#NO_RECREATE
	 */
	public static void enableFor(ColumnViewer viewer, int style) {
		new ColumnViewerToolTipSupport(viewer,style,false);