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/window/ToolTip.java
* overlap the monitors bounds. The monitor the tooltip belongs to is the
	 * same is control's monitor the tooltip is shown for.
	 * <p>
	 * Default is <code>true</code>
	 * </p>
	 *
	 * @param respectMonitorBounds
	 */
	public void setRespectMonitorBounds(boolean respectMonitorBounds) {
		this.respectMonitorBounds = respectMonitorBounds;
	}
	/**
	 * Should the tooltip displayed because of the given event.
	 * <p>
	 * <b>Subclasses may overwrite this to get custom behaviour</b>
	 * </p>
	 *
	 * @param event
	 *            the event
	 * @return <code>true</code> if tooltip should be displayed
	 */
	protected boolean shouldCreateToolTip(Event event) {
		if ((style & NO_RECREATE) != 0) {
			Object tmp = getToolTipArea(event);
			
			if (tmp == null) {
				hide();
				return false;
			}
			boolean rv = !tmp.equals(currentArea);