Bug 8686 Type Hierarchy: no methods shown
Smoke for build 20020129 - open type hierarchy on TestCase - switch to Subtype hierarchy - observe: you don't see any members of TestCase - lock the method view observe: now it is impossible to get the members back. You can click on any node in the upper class pane. You have to unlock the view
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
} else {
			title= viewerTitle;
			tooltip= viewerTitle;
		}
		setTitle(title);
		setTitleToolTip(tooltip);
	}
	
	private void updateToolbarButtons() {
		boolean isType= fInputElement instanceof IType;
		for (int i= 0; i < fViewActions.length; i++) {
			ToggleViewAction action= fViewActions[i];
			if (action.getViewerIndex() == VIEW_ID_TYPE) {
				action.setEnabled(fInputElement != null);
			} else {
				action.setEnabled(isType);
			}
		}
	}
		
	/**
	 * Sets the current view (see view id)
	 * called from ToggleViewAction. Must be called after creation of the viewpart.
	 */	
	public void setView(int viewerIndex) {
		Assert.isNotNull(fAllViewers);
		if (viewerIndex < fAllViewers.length && fCurrentViewerIndex != viewerIndex) {			
			fCurrentViewerIndex= viewerIndex;
			
			updateHierarchyViewer();