public override void DrawOrMove(ChartPoint previousDrawn, ChartPoint current, int index, ChartCore chart)
        {
            var invertedMode = ((StepLineSeries)current.SeriesView).InvertedMode;

            if (IsNew)
            {
                if (invertedMode)
                {
                    Line1.X1 = current.ChartLocation.X;
                    Line1.X2 = current.ChartLocation.X - DeltaX;
                    Line1.Y1 = chart.DrawMargin.Height;
                    Line1.Y2 = chart.DrawMargin.Height;

                    Line2.X1 = current.ChartLocation.X - DeltaX;
                    Line2.X2 = current.ChartLocation.X - DeltaX;
                    Line2.Y1 = chart.DrawMargin.Height;
                    Line2.Y2 = chart.DrawMargin.Height;
                }
                else
                {
                    Line1.X1 = current.ChartLocation.X;
                    Line1.X2 = current.ChartLocation.X;
                    Line1.Y1 = chart.DrawMargin.Height;
                    Line1.Y2 = chart.DrawMargin.Height;

                    Line2.X1 = current.ChartLocation.X - DeltaX;
                    Line2.X2 = current.ChartLocation.X;
                    Line2.Y1 = chart.DrawMargin.Height;
                    Line2.Y2 = chart.DrawMargin.Height;
                }

                if (Shape != null)
                {
                    Canvas.SetLeft(Shape, current.ChartLocation.X - Shape.Width / 2);
                    Canvas.SetTop(Shape, chart.DrawMargin.Height);
                }
            }

            if (DataLabel != null && double.IsNaN(Canvas.GetLeft(DataLabel)))
            {
                Canvas.SetTop(DataLabel, chart.DrawMargin.Height);
                Canvas.SetLeft(DataLabel, current.ChartLocation.X);
            }

            if (HoverShape != null)
            {
                HoverShape.Width  = Shape != null ? Shape.Width > 5 ? Shape.Width : 5 : 5;
                HoverShape.Height = Shape != null ? Shape.Height > 5 ? Shape.Height : 5 : 5;
                Canvas.SetLeft(HoverShape, current.ChartLocation.X - HoverShape.Width / 2);
                Canvas.SetTop(HoverShape, current.ChartLocation.Y - HoverShape.Height / 2);
            }

            if (chart.View.DisableAnimations)
            {
                if (invertedMode)
                {
                    Line1.X1 = current.ChartLocation.X;
                    Line1.X2 = current.ChartLocation.X - DeltaX;
                    Line1.Y1 = current.ChartLocation.Y;
                    Line1.Y2 = current.ChartLocation.Y;

                    Line2.X1 = current.ChartLocation.X - DeltaX;
                    Line2.X2 = current.ChartLocation.X - DeltaX;
                    Line2.Y1 = current.ChartLocation.Y;
                    Line2.Y2 = current.ChartLocation.Y - DeltaY;
                }
                else
                {
                    Line1.X1 = current.ChartLocation.X;
                    Line1.X2 = current.ChartLocation.X;
                    Line1.Y1 = current.ChartLocation.Y;
                    Line1.Y2 = current.ChartLocation.Y - DeltaY;

                    Line2.X1 = current.ChartLocation.X - DeltaX;
                    Line2.X2 = current.ChartLocation.X;
                    Line2.Y1 = current.ChartLocation.Y - DeltaY;
                    Line2.Y2 = current.ChartLocation.Y - DeltaY;
                }

                if (Shape != null)
                {
                    Canvas.SetLeft(Shape, current.ChartLocation.X - Shape.Width / 2);
                    Canvas.SetTop(Shape, current.ChartLocation.Y - Shape.Height / 2);
                }

                if (DataLabel != null)
                {
                    DataLabel.UpdateLayout();
                    var xl = CorrectXLabel(current.ChartLocation.X - DataLabel.ActualWidth * .5, chart);
                    var yl = CorrectYLabel(current.ChartLocation.Y - DataLabel.ActualHeight * .5, chart);
                    Canvas.SetLeft(DataLabel, xl);
                    Canvas.SetTop(DataLabel, yl);
                }

                return;
            }

            var animSpeed = chart.View.AnimationsSpeed;

            if (invertedMode)
            {
                Line1.BeginAnimation(Line.X1Property,
                                     new DoubleAnimation(current.ChartLocation.X, animSpeed));
                Line1.BeginAnimation(Line.X2Property,
                                     new DoubleAnimation(current.ChartLocation.X - DeltaX, animSpeed));
                Line1.BeginAnimation(Line.Y1Property,
                                     new DoubleAnimation(current.ChartLocation.Y, animSpeed));
                Line1.BeginAnimation(Line.Y2Property,
                                     new DoubleAnimation(current.ChartLocation.Y, animSpeed));

                Line2.BeginAnimation(Line.X1Property,
                                     new DoubleAnimation(current.ChartLocation.X - DeltaX, animSpeed));
                Line2.BeginAnimation(Line.X2Property,
                                     new DoubleAnimation(current.ChartLocation.X - DeltaX, animSpeed));
                Line2.BeginAnimation(Line.Y1Property,
                                     new DoubleAnimation(current.ChartLocation.Y, animSpeed));
                Line2.BeginAnimation(Line.Y2Property,
                                     new DoubleAnimation(current.ChartLocation.Y - DeltaY, animSpeed));
            }
            else
            {
                Line1.BeginAnimation(Line.X1Property,
                                     new DoubleAnimation(current.ChartLocation.X, animSpeed));
                Line1.BeginAnimation(Line.X2Property,
                                     new DoubleAnimation(current.ChartLocation.X, animSpeed));
                Line1.BeginAnimation(Line.Y1Property,
                                     new DoubleAnimation(current.ChartLocation.Y, animSpeed));
                Line1.BeginAnimation(Line.Y2Property,
                                     new DoubleAnimation(current.ChartLocation.Y - DeltaY, animSpeed));

                Line2.BeginAnimation(Line.X1Property,
                                     new DoubleAnimation(current.ChartLocation.X - DeltaX, animSpeed));
                Line2.BeginAnimation(Line.X2Property,
                                     new DoubleAnimation(current.ChartLocation.X, animSpeed));
                Line2.BeginAnimation(Line.Y1Property,
                                     new DoubleAnimation(current.ChartLocation.Y - DeltaY, animSpeed));
                Line2.BeginAnimation(Line.Y2Property,
                                     new DoubleAnimation(current.ChartLocation.Y - DeltaY, animSpeed));
            }

            if (Shape != null)
            {
                Shape.BeginAnimation(Canvas.LeftProperty,
                                     new DoubleAnimation(current.ChartLocation.X - Shape.Width / 2, animSpeed));
                Shape.BeginAnimation(Canvas.TopProperty,
                                     new DoubleAnimation(current.ChartLocation.Y - Shape.Height / 2, animSpeed));
            }

            if (DataLabel != null)
            {
                DataLabel.UpdateLayout();
                var xl = CorrectXLabel(current.ChartLocation.X - DataLabel.ActualWidth * .5, chart);
                var yl = CorrectYLabel(current.ChartLocation.Y - DataLabel.ActualHeight * .5, chart);
                Canvas.SetLeft(DataLabel, xl);
                Canvas.SetTop(DataLabel, yl);
            }
        }