Bug 29698 drag and drop of java files between packages in package explorer doesn't work
the <preview> <ok> <cancel> dialog shows up, but <ok> has the same effect as <cancel> and <preview> would only show movements of files and no changes in imports of other java files. on <ok> in the preview it only moves the file(s) (as indicated ) without changing referencing imports.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/SelectionTransferDropAdapter.java
}
		return fCanMoveElements == 2;
	}
	
	private boolean canActivate(ReorgRefactoring ref){
		try{
			return ref.checkActivation(new NullProgressMonitor()).isOK();
		} catch(JavaModelException e){
			ExceptionHandler.handle(e, PackagesMessages.getString("SelectionTransferDropAdapter.error.title"), PackagesMessages.getString("SelectionTransferDropAdapter.error.message")); 
			return false;
		}
	}
	private void handleDropLink(Object target, DropTargetEvent event) {
		if (fAddMethodStubAction.init((IType)target, getSelection())) 
			fAddMethodStubAction.run();
	}
	private int handleValidateLink(Object target, DropTargetEvent event) {
		if (target instanceof IType && AddMethodStubAction.canActionBeAdded((IType)target, getSelection()))
			return DND.DROP_LINK;
		else		
			return DND.DROP_NONE;
	}
	
	private void handleDropMove(final Object target, DropTargetEvent event) throws JavaModelException{
		if (canPasteSourceReferences(target)){
			pasteSourceReferences(target, event);
			return;
		}
		new DragNDropMoveAction(new SimpleSelectionProvider(fElements), target).run();
	}