Bug 6765 Type hierarchy missing buttons when in "Hierarchy View Only" mode
Build 20011206, Win2000 Steps: 1) Put the type hierarchy view in "Hierarchy View Only" 2) Shutdown the workbench and restart 3) The type hierarchy is now missing its toolbar buttons, the ones that cycle between the different type hierarchy modes. Workaround is to switch to "Vertical Viewer Orientation", then back to "Hierarchy View Only", then the buttons reappear. Side note: This seems to be the only place in the UI that the term "Viewer" is used. Maybe it should say "Vertical View Orientation", etc. There's probably a JFace viewer underneath, but users are only aware of views, not viewers.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
private SashForm fTypeMethodsSplitter;
	private PageBook fViewerbook;
	private PageBook fPagebook;
	
	private Label fNoHierarchyShownLabel;
	private Label fEmptyTypesViewer;
	
	private ViewForm fTypeViewerViewForm;
	private ViewForm fMethodViewerViewForm;
	
	private CLabel fMethodViewerPaneLabel;
	private JavaElementLabelProvider fPaneLabelProvider;
	
	private IDialogSettings fDialogSettings;
	
	private ToggleViewAction[] fViewActions;
	
	private HistoryDropDownAction fHistoryDropDownAction;
	
	private ToggleOrientationAction[] fToggleOrientationActions;
	private int fCurrentOrientation;
	
	private EnableMemberFilterAction fEnableMemberFilterAction;
	private AddMethodStubAction fAddStubAction;
	private FocusOnTypeAction fFocusOnTypeAction;
	private FocusOnSelectionAction fFocusOnSelectionAction;
	
	private IPartListener fPartListener;