Example line plotting

Example Line Plotting

        #region Plotting methods
        #region PlotLine
        protected void PlotLine(Graphics graphics, Rectangle bounds, double min, double max, Pen pen, Func<int, double?> GetLineValueAtIndex) {
            var firstBarIndex = ChartControl.FirstBarPainted;
            var lastBarIndex = Math.Min(BarsArray[0].Count - 1, ChartControl.LastBarPainted);
            using (var path = new GraphicsPath()) {
                for (var barIndex = firstBarIndex; barIndex < lastBarIndex; barIndex++) {
                    var value1 = GetLineValueAtIndex(barIndex);
                    var value2 = GetLineValueAtIndex(barIndex + 1);
                    if (value1.HasValue && value2.HasValue) {
                        var x1 = ChartControl.GetXByBarIdx(BarsArray[0], barIndex);
                        var x2 = ChartControl.GetXByBarIdx(BarsArray[0], barIndex + 1);
                        var y1 = ChartControl.GetYByValue(BarsArray[0], value1.Value);
                        var y2 = ChartControl.GetYByValue(BarsArray[0], value2.Value);
                        path.AddLine(x1, y1, x2, y2);
                    }
                }
                graphics.DrawPath(pen, path);
            }
            #region demo code
            //NinjaTrader.Gui.Chart.PlotStyle plotStyle = Gui.Chart.PlotStyle.Line;
            //switch (plotStyle) {
            //    case NinjaTrader.Gui.Chart.PlotStyle.Line: {
            //            if (lastX >= 0) {
            //                if (graphicsPath == null)
            //                    graphicsPath = new GraphicsPath();

            //                int offset = (int)Math.Ceiling(drawPenWidth / 4); // this is a heuristic value to make style 'Line' math with style 'Bar' CH 20100624
            //                graphicsPath.AddLine(lastX - offset, lastY, x - offset, y);
            //            }
            //            break;
            //        }
            //}
            #endregion
        }
        #endregion
        #endregion