SmartQuant.FinChart.Pad.Update C# (CSharp) Method

        internal void Update(Graphics g)
        {
            if (this.chart.MainSeries == null || this.chart.MainSeries.Count == 0)
                return;
            Graphics = g;
            if (MinValue != double.MaxValue && MaxValue != double.MinValue)
            {
                Axis.Paint();
                g.SetClip(new Rectangle(X1, Y1, this.width, this.height));
                foreach (IChartDrawable drawable in this.simplePrimitives)
                    if (DrawItems || drawable is SeriesView)
                        drawable.Paint();
                if (DrawItems)
                {
                    int nextIndex = this.rangeList.GetNextIndex(this.chart.MainSeries.GetDateTime(this.chart.FirstIndex));
                    int prevIndex = this.rangeList.GetPrevIndex(this.chart.MainSeries.GetDateTime(this.chart.LastIndex));
                    if (nextIndex != -1 && prevIndex != -1)
                        for (int i = nextIndex; i <= prevIndex; ++i)
                            foreach (IChartDrawable drawable in this.rangeList[i])
                                drawable.Paint();
                }
                g.ResetClip();
            }
            float num = X1 + 2f;
            string legend = null;
            foreach (IChartDrawable drawable in this.simplePrimitives)
            {
                if (drawable is SeriesView)
                {
                    var sView = drawable as SeriesView;
                    if (sView.DisplayNameEnabled)
                    {
                        legend = legend == null ? sView.DisplayName : " " + sView.DisplayName;
                        var size = g.MeasureString(legend, this.chart.Font);
                        g.FillRectangle(new SolidBrush(this.chart.CanvasColor), num + 2f, Y1 + 2f, size.Width, size.Height);
                        g.DrawString(legend, this.chart.Font, new SolidBrush(sView.Color), num + 2f, Y1 + 2f);
                        num += size.Width;
                    }
                }
            }
            if (this.outlineEnabled)
                g.DrawRectangle(new Pen(Color.Green), this.outlineRectangle);
        }