Device.getPosition

void getPosition(out gdk.screen.Screen screen, out int x, out int y)

Gets the current location of device. 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].

Parameters

screenlocation to store the #GdkScreen the device is on, or null.
xlocation to store root window X coordinate of device, or null.
ylocation to store root window Y coordinate of device, or null.