static void OnSideLinesBrushChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            BeamArcMask me = sender as BeamArcMask;

            if (me != null)
            {
                me.DrawArc();
            }
        }
        static void OnWallRatioChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            BeamArcMask me = sender as BeamArcMask;

            if (me != null)
            {
                me.CalculateLines();
                me.DrawArc();
            }
        }
        static void OnDataChange(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            BeamArcMask me = sender as BeamArcMask;

            if (me != null)
            {
                me.SetCenterImagePosition();
                me.DrawCenterLine();
                me.CalculateLines();
                me.DrawArc();
            }
        }