Bug 34335 DND doesn't work
RC2 Linux-GTK Drag and drop doesn't work. I've tried it in the DNDExample and in the package explorer and drags are never initiated.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
return;
		}
		
		Display display= getDisplay();
		if (display != null) {
			fIsRefreshRunnablePosted= true;
			display.asyncExec(new Runnable() {
				public void run() {
					try {
						if (fPagebook != null && !fPagebook.isDisposed()) {
							doTypeHierarchyChangedOnViewers(changedTypes);
						}
					} finally {
						fIsRefreshRunnablePosted= false;
					}
				}
			});
		}
	}
	
	protected void doTypeHierarchyChangedOnViewers(IType[] changedTypes) {
		if (fHierarchyLifeCycle.getHierarchy() == null || !fHierarchyLifeCycle.getHierarchy().exists()) {
			clearInput();
		} else {
			if (changedTypes == null) {
				
				try { 
					fHierarchyLifeCycle.ensureRefreshedTypeHierarchy(fInputElement, getSite().getWorkbenchWindow());
				} catch (InvocationTargetException e) {
					ExceptionHandler.handle(e, getSite().getShell(), TypeHierarchyMessages.getString("TypeHierarchyViewPart.exception.title"), TypeHierarchyMessages.getString("TypeHierarchyViewPart.exception.message"));