The contains-pointer property of type :boolean (Read)
Whether the pointer of a Drag-and-Drop operation is in the controller’s widget or a descendant. See also the is-pointer property. When handling crossing events, this property is updated before the "enter" signal, but after the "leave" signal is emitted.

The drop property of type gdk:drop (Read)
The ongoing drop operation over the widget of the controller or its descendant. If no drop operation is going on, this property returns nil. The event controller should not modify the drop, but it might want to query its properties. When handling crossing events, this property is updated before the "enter" signal, but after the "leave" signal is emitted.

The is-pointer property of type :boolean (Read)
Whether the pointer is in the controllers widget itself, as opposed to in a descendent widget. See also the contains-pointer property. When handling crossing events, this property is updated before the "enter" signal, but after the "leave" signal is emitted.