Bug 30655 [DND] Check selection in NavigatorDragAdapter.dragStart
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/navigator/NavigatorDragAdapter.java
return;
			
			checker = new ReadOnlyStateChecker(shell, CHECK_MOVE_TITLE, CHECK_DELETE_MESSAGE);
			resources = checker.checkReadOnlyResources(resources);		
			
			for (int i = 0; i < resources.length; i++) {
				try {
					resources[i].delete(IResource.KEEP_HISTORY | IResource.FORCE, null);
				} catch (CoreException e) {
					e.printStackTrace();
				}
			}
		} else if (event.detail == DND.DROP_TARGET_MOVE) {
			IResource[] resources = getSelectedResources(typeMask);
			
			
			if (resources == null)
				return;
			for (int i = 0; i < resources.length; i++) {
				try {
					resources[i].refreshLocal(IResource.DEPTH_INFINITE, null);
				} catch (CoreException e) {
					e.printStackTrace();
				}
			}
		}
	}
	/**
	 * @see DragSourceListener#dragSetData
	 */