I have a two TreeView controls, one on the left side and one on the right side. The users should be able to drag items from the left side to the right side, but not the other way around. I have this functionality working, but I want to remove the visual elements (Drag Preview, Preview Line and Tooltip) when the drag is over the left side so that the users don't think that they are allowed to drag.
I've tried setting the following:
But I still get all the visuals. I'd be fine with the visual queue that shows the red indicator saying no to the user.