ScatterViews, Touch Events and Manipulators

Hi everyone !

I added a 3d viewport inside a scatterview item. So I had to manually add a manipulator to the cameracontroller in order to catch the manipulation events on the viewport, otherwise the scatterview catch it. I did it this way :

        private void HV3DTouchDown(object sender, TouchEventArgs e)
        {
            CameraController cameraController = Viewport3D.CameraController;
            try
            {
                Manipulation.AddManipulator(Viewport3D, e.TouchDevice.AsManipulator());
            }
            catch
            {
                Console.WriteLine("Error occured in Sketch3D.HV3DTouchDown");
            }
            e.Handled = true;
            CaptureTouch(e.TouchDevice);
        }

        private void HV3DTouchLeave(object sender, TouchEventArgs e)
        {
            CameraController cameraController = Viewport3D.CameraController;
            try
            {
                Manipulation.RemoveManipulator(cameraController, e.TouchDevice.AsManipulator());
            }
            catch
            {
                Console.WriteLine("Error occured in Sketch3D.HV3DTouchLeave");
            }
            e.Handled = true;
            CaptureTouch(e.TouchDevice);
        }

But now, I would like to catch the manipulation on a manipulator (or any other 3D object in my scene) and I can't figure out how to achieve it, because of the AddManipulator method which only takes a UIElement and not a UIElement3D...

Is there any workaround about this ?

Thanks in advance ! Regards.
(Sorry for my bad english...)