public unowned Window? get_window_at_position (out int win_x, out int win_y)
Obtains the window underneath this, returning the location of the device in
Returns null if the window tree under this is not known to GDK (for example, belongs to another application).
As a slave device coordinates are those of its master pointer, This function may not be called on devices of type gdk_device_type_slave, unless there is an ongoing grab on them, see grab.
pointer Device to query info to.
return location for the X coordinate of the device location, relative to the window origin, or null.
return location for the Y coordinate of the device location, relative to the window origin, or null.
the Window under the device position, or null.