Inheritance: PointView, IPieSlicePointView
        /// <summary>
        /// Gets the view of a given point
        /// </summary>
        /// <param name="point"></param>
        /// <param name="label"></param>
        /// <returns></returns>
        public override IChartPointView GetPointView(ChartPoint point, string label)
        {
            var pbv = (PiePointView) point.View;

            if (pbv == null)
            {
                pbv = new PiePointView
                {
                    IsNew = true,
                    Slice = new PieSlice()
                };
                Model.Chart.View.AddToDrawMargin(pbv.Slice);
            }
            else
            {
                pbv.IsNew = false;
                point.SeriesView.Model.Chart.View
                    .EnsureElementBelongsToCurrentDrawMargin(pbv.Slice);
                point.SeriesView.Model.Chart.View
                    .EnsureElementBelongsToCurrentDrawMargin(pbv.HoverShape);
                point.SeriesView.Model.Chart.View
                    .EnsureElementBelongsToCurrentDrawMargin(pbv.DataLabel);
            }

            pbv.Slice.Fill = Fill;
            pbv.Slice.Stroke = Stroke;
            pbv.Slice.StrokeThickness = StrokeThickness;
            pbv.Slice.StrokeDashArray = StrokeDashArray;
            pbv.Slice.PushOut = PushOut;
            pbv.Slice.Visibility = Visibility;
            Panel.SetZIndex(pbv.Slice, Panel.GetZIndex(this));

            if (Model.Chart.RequiresHoverShape && pbv.HoverShape == null)
            {
                pbv.HoverShape = new PieSlice
                {
                    Fill = Brushes.Transparent,
                    StrokeThickness = 0
                };

                Panel.SetZIndex(pbv.HoverShape, int.MaxValue);

                var wpfChart = (Chart)Model.Chart.View;
                wpfChart.AttachHoverableEventTo(pbv.HoverShape);

                Model.Chart.View.AddToDrawMargin(pbv.HoverShape);
            }

            if (pbv.HoverShape != null) pbv.HoverShape.Visibility = Visibility;

            if (DataLabels && pbv.DataLabel == null)
            {
                pbv.DataLabel = BindATextBlock(0);
                Panel.SetZIndex(pbv.DataLabel, int.MaxValue - 1);

                Model.Chart.View.AddToDrawMargin(pbv.DataLabel);
            }

            if (pbv.DataLabel != null) pbv.DataLabel.Text = label;

            pbv.OriginalPushOut  = PushOut;

            return pbv;
        }
        public override IChartPointView GetPointView(IChartPointView view, ChartPoint point, string label)
        {
            var pbv = (view as PiePointView);

            if (pbv == null)
            {
                pbv = new PiePointView
                {
                    IsNew = true,
                    Slice = new PieSlice()
                };

                BindingOperations.SetBinding(pbv.Slice, Shape.FillProperty,
                    new Binding { Path = new PropertyPath(FillProperty), Source = this });
                BindingOperations.SetBinding(pbv.Slice, Shape.StrokeProperty,
                    new Binding { Path = new PropertyPath(StrokeProperty), Source = this });
                BindingOperations.SetBinding(pbv.Slice, Shape.StrokeThicknessProperty,
                    new Binding {Path = new PropertyPath(StrokeThicknessProperty), Source = this});
                BindingOperations.SetBinding(pbv.Slice, Shape.StrokeDashArrayProperty,
                    new Binding {Path = new PropertyPath(StrokeDashArrayProperty), Source = this});
                BindingOperations.SetBinding(pbv.Slice, PieSlice.PushOutProperty,
                    new Binding {Path = new PropertyPath(PushOutProperty), Source = this});
                BindingOperations.SetBinding(pbv.Slice, Panel.ZIndexProperty,
                    new Binding {Path = new PropertyPath(Panel.ZIndexProperty), Source = this});
                BindingOperations.SetBinding(pbv.Slice, VisibilityProperty,
                    new Binding {Path = new PropertyPath(VisibilityProperty), Source = this});

                Model.Chart.View.AddToDrawMargin(pbv.Slice);
            }
            else
            {
                pbv.IsNew = false;
                point.SeriesView.Model.Chart.View
                    .EnsureElementBelongsToCurrentDrawMargin(pbv.Slice);
                point.SeriesView.Model.Chart.View
                    .EnsureElementBelongsToCurrentDrawMargin(pbv.HoverShape);
                point.SeriesView.Model.Chart.View
                    .EnsureElementBelongsToCurrentDrawMargin(pbv.DataLabel);
            }

            if (Model.Chart.RequiresHoverShape && pbv.HoverShape == null)
            {
                pbv.HoverShape = new PieSlice
                {
                    Fill = Brushes.Transparent,
                    StrokeThickness = 0
                };

                Panel.SetZIndex(pbv.HoverShape, int.MaxValue);
                BindingOperations.SetBinding(pbv.HoverShape, VisibilityProperty,
                    new Binding {Path = new PropertyPath(VisibilityProperty), Source = this});

                var wpfChart = (Chart)Model.Chart.View;
                wpfChart.AttachHoverableEventTo(pbv.HoverShape);

                Model.Chart.View.AddToDrawMargin(pbv.HoverShape);
            }

            if (DataLabels && pbv.DataLabel == null)
            {
                pbv.DataLabel = BindATextBlock(0);
                Panel.SetZIndex(pbv.DataLabel, int.MaxValue - 1);

                Model.Chart.View.AddToDrawMargin(pbv.DataLabel);
            }

            if (pbv.DataLabel != null) pbv.DataLabel.Text = label;

            return pbv;
        }