device position, or null.
Device.getWindowAtPositionDouble
gdk.window.Window getWindowAtPositionDouble(out double winX, out double winY)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].
Parameters
winX | return location for the X coordinate of the device location, relative to the window origin, or null. |
winY | return location for the Y coordinate of the device location, relative to the window origin, or null. |
Returns
the #GdkWindow under the