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 #GdkWindow under the device position, or null.
Obtains the window underneath device, returning the location of the device in win_x and win_y in double precision. Returns null if the window tree under device 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.types.DeviceType.Slave, unless there is an ongoing grab on them, see gdk.device.Device.grab.