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
initializeTypesViewer(vajViewer, keyListener, IContextMenuConstants.TARGET_ID_HIERARCHY_VIEW);
		fAllViewers= new TypeHierarchyViewer[3];
		fAllViewers[VIEW_ID_SUPER]= superTypesViewer;
		fAllViewers[VIEW_ID_SUB]= subTypesViewer;
		fAllViewers[VIEW_ID_TYPE]= vajViewer;
		
		int currViewerIndex;
		try {
			currViewerIndex= fDialogSettings.getInt(DIALOGSTORE_HIERARCHYVIEW);
			if (currViewerIndex < 0 || currViewerIndex > 2) {
				currViewerIndex= VIEW_ID_TYPE;
			}
		} catch (NumberFormatException e) {
			currViewerIndex= VIEW_ID_TYPE;
		}
			
		fEmptyTypesViewer= new Label(fViewerbook, SWT.TOP | SWT.LEFT | SWT.WRAP);
		
		for (int i= 0; i < fAllViewers.length; i++) {
			fAllViewers[i].setInput(fAllViewers[i]);
		}
		
		
		fCurrentViewerIndex= -1;
		setView(currViewerIndex);
				
		return fViewerbook;
	}
	
	private KeyListener createKeyListener() {