Gets the current location of @device in double precision. As a slave device's
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 gdk_device_grab().
Gets the current location of @device in double precision. As a slave device's 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 gdk_device_grab().