Arguments for the TreeView
The look-up info for the item onto which the dragged item is dropped.
A reference of the TreeView onto which the dragged item is dropped.
Describes where the dragged item is dropped relative to the drop target item.
The original pointer event holding details about the current pointer position.
The look-up info for the dragged item.
A reference of the TreeView from which the dragged item originates.
If the event is prevented by any of its subscribers, returns
true if the default action was prevented. Otherwise, returns
Prevents the default action for a specified event. In this way, the source component suppresses the built-in behavior that follows the event.
Specifies if the drop action should be marked as valid.
If set to
removeItem events will not be fired and the drag clue
will be animated back to the source item to indicate the action is marked as invalid.