Bug 164350 [JFace] Listener optimization in ToolTip
The hideListener in ToolTip is a bit too eager. If we're not handling mouse down events it doesn't need to be applied recursively. Also, the mouseExit hander doesn't need to be on anything under the shell. If fixed we should be careful to re-tool the listener in the event that the setHideOnMouseDown event changes state of that field.
bundles/org.eclipse.jface/src/org/eclipse/jface/window/ToolTip.java
* 
	 * @param p
	 *            the new shift
	 */
	public void setShift(Point p) {
		xShift = p.x;
		yShift = p.y;
	}
	/**
	 * Activate tooltip support for this control
	 */
	public void activate() {
		deactivate();
		control.addListener(SWT.Dispose, listener);
		control.addListener(SWT.MouseHover, listener);
		control.addListener(SWT.MouseMove, listener);
		control.addListener(SWT.MouseExit, listener);
		control.addListener(SWT.MouseDown, listener);
	}
	/**
	 * Deactivate tooltip support for the underlying control
	 */
	public void deactivate() {
		control.removeListener(SWT.Dispose, listener);
		control.removeListener(SWT.MouseHover, listener);
		control.removeListener(SWT.MouseMove, listener);
		control.removeListener(SWT.MouseExit, listener);
		control.removeListener(SWT.MouseDown, listener);
	}
	/**