getDeviceTool
Returns the GdkDeviceTool
currently driving input through this gesture.
This function must be called from the handler of one of the signal@Gtk.GestureStylus::down, signal@Gtk.GestureStylus::motion, signal@Gtk.GestureStylus::up or signal@Gtk.GestureStylus::proximity signals.
Return
The current stylus tool