private void slider2D_ItemSelected(object sender, SelectableSlider2DSelectEventArgs e)
{
if (handHandler != null)
{
handHandler.HandlePush(e.SelectDirection);
}
if (e.SelectDirection == Direction.Backward)
{
slider2D.Reposition(new XnMPoint(lastRealHandPoint.X, lastRealHandPoint.Y, lastRealHandPoint.Z));
}
}