Bug 4369 F2 should work even if "Hide Text Hover" is enabled
- enable "Hide Text Hover" - position the cursor on a type - press F2 observe: nothing happens although I explicitly requested JavaDoc help.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/hover/JavaTextHover.java
* @see IPartListener#partActivated(IWorkbenchPart)
		 */
		public void partActivated(IWorkbenchPart part) {
			update();
		}
		
		public void partBroughtToTop(IWorkbenchPart part) {
			update();
		}	
	};
	
	class PropertyChangeListener implements IPropertyChangeListener {
		/**
		 * @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
		 */
		public void propertyChange(PropertyChangeEvent event) {
			if (IPreferencesConstants.EDITOR_SHOW_HOVER.equals(event.getProperty())) {
				Object newValue= event.getNewValue();
				if (newValue instanceof Boolean)
					fEnabled= ((Boolean) newValue).booleanValue();
			}
		}
	};
	
	
	protected IEditorPart fEditor;
	protected IPartListener fPartListener;
	protected IPropertyChangeListener fPropertyChangeListener;
	
	protected String fCurrentPerspective;