Bug 100429 dropping on type hierarchy method viewer updates input
20050616-0010 - Open a element in the type hierarchy - enable 'Show all inherited methods' - select a method from Object, drop it to itself - Hierarchy of Object is built Drop to itself can happen easely when clicking quickly on entries. Dropping on the method viewer should be disabled (and I think it was before)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
private Control createMethodViewerControl(Composite parent) {
		fMethodsViewer= new MethodsViewer(parent, fHierarchyLifeCycle, this);
		fMethodsViewer.initContextMenu(new IMenuListener() {
			public void menuAboutToShow(IMenuManager menu) {
				fillMethodsViewerContextMenu(menu);
			}
		}, IContextMenuConstants.TARGET_ID_MEMBERS_VIEW, getSite());
		fMethodsViewer.addPostSelectionChangedListener(fSelectionChangedListener);
		
		Control control= fMethodsViewer.getTable();
		control.addKeyListener(createKeyListener());
		control.addFocusListener(new FocusListener() {
			public void focusGained(FocusEvent e) {
				fSelectAllAction.setEnabled(true);
			}
			public void focusLost(FocusEvent e) {
				fSelectAllAction.setEnabled(false);
			}
		});
		
		return control;
	}
	
	private void initDragAndDrop() {
		for (int i= 0; i < fAllViewers.length; i++) {
			addDragAdapters(fAllViewers[i]);
			addDropAdapters(fAllViewers[i]);
		}	
		addDragAdapters(fMethodsViewer);