*/
public void partDeactivated(IWorkbenchPart part) {
super.partDeactivated(part);
IWorkbenchPartSite site = part.getSite();
SubActionBars bars = (SubActionBars) ((PartSite) site).getActionBars();
bars.removePropertyChangeListener(propertyChangeListener);
IWorkbenchPart activePart = part.getSite().getPage().getActivePart();
if (activePart != null) {
// We are going to get a part activated message so don't bother setting the
// action handler to null. This prevents enablement flash in the toolbar