"automatically scale axis" Code Answer's

automatically scale axis

By Distinct Dove on Apr 25, 2021

public Form1()
        {
            InitializeComponent();
            InitializeChart();
        }

        private DataSet GetData()
        {
            DataSet TeeDataSet = new DataSet();
            DateTime dt = DateTime.Today;
            DataTable TeeDataTable = new DataTable("DataTable1");
            DataColumn xval = new DataColumn("DateTime", typeof(DateTime));
            DataColumn yval = new DataColumn("SystemName", typeof(double));

            TeeDataTable.Columns.Add(xval);
            TeeDataTable.Columns.Add(yval);
            Random rnd = new Random();
            for (int i = 0; i < 10; i++)
            {
                DataRow newRow = TeeDataTable.NewRow();
                newRow[xval] = dt;
                newRow[yval] = rnd.Next(100);
                TeeDataTable.Rows.Add(newRow);
                dt = dt.AddMonths(1);
            }
            TeeDataSet.Tables.Add(TeeDataTable);
            return TeeDataSet;
        }
        private void InitializeChart()
        {
            tChart1.Aspect.View3D = false;
            tChart1.Header.Visible = false;
            tChart1.Legend.Alignment = LegendAlignments.Bottom;
            tChart1.Legend.CheckBoxes = true;
            for (int i = 0; i < 5; i++)
            {
                new Steema.TeeChart.Styles.Line(tChart1.Chart);
                tChart1[i].Title = "SystemName";
                tChart1[i].DataSource = GetData();//Add values using DataSource
                tChart1[i].XValues.DataMember = "DateTime";
                tChart1[i].XValues.DateTime = true;
                tChart1[i].XValues.Order = Steema.TeeChart.Styles.ValueListOrder.Ascending;
                tChart1[i].YValues.DataMember = "SystemName";
                tChart1.Axes.Custom.Add(new Steema.TeeChart.Axis(tChart1.Chart));
                tChart1[i].CustomVertAxis = tChart1.Axes.Custom[i];
                tChart1.Axes.Custom[i].AxisPen.Color = tChart1[i].Color;
                tChart1.Axes.Custom[i].Grid.Visible = false;

                tChart1.Axes.Custom[i].PositionUnits = PositionUnits.Pixels;
            }

            tChart1.Panel.MarginUnits = PanelMarginUnits.Pixels;
            tChart1.Panel.MarginTop = 20;
            tChart1.Draw();
            PlaceAxes(0, 0, 0, 0, 0);
            tChart1.AfterDraw += new PaintChartEventHandler(tChart1_AfterDraw);
            tChart1.ClickLegend += new MouseEventHandler(tChart1_ClickLegend);
            tChart1.Draw();
        }

        void tChart1_ClickLegend(object sender, MouseEventArgs e)
        {
            tChart1.Draw();
        }

        void tChart1_AfterDraw(object sender, Graphics3D g)
        {
            PlaceAxes(0, 0, 0, 0, 0);
        }

        private void PlaceAxes(int nSeries, int NextXLeft, int NextXRight, int MargLeft, int MargRight)
        {
            const int extraPos = 12;
            const int extraMargin = 60;
            //Variable 
            int MaxLabelsWidth;
            int lenghtTicks;
            int extraSpaceBetweenTitleAndLabels;
            foreach (Steema.TeeChart.Styles.Line s in tChart1.Series)
            {
                if (s.Active)
                {
                    s.CustomVertAxis.Visible = true;
                    s.CustomVertAxis.SetMinMax(tChart1[0].YValues.Minimum, tChart1[0].YValues.Maximum);
                    MaxLabelsWidth = s.CustomVertAxis.MaxLabelsWidth();
                    lenghtTicks = s.CustomVertAxis.Ticks.Length;
                    extraSpaceBetweenTitleAndLabels = (s.CustomVertAxis.Title.Width);//- tChart1.Axes.Custom[nSeries].MaxLabelsWidth());
                    if (s.CustomVertAxis.Title.Visible)
                    {
                        s.CustomVertAxis.RelativePosition = NextXLeft;
                        NextXLeft = NextXLeft - (MaxLabelsWidth + lenghtTicks + extraSpaceBetweenTitleAndLabels + extraPos);
                        MargLeft = MargLeft + extraMargin;
                    }

                    else
                    {
                        s.CustomVertAxis.RelativePosition = NextXLeft;
                        NextXLeft = NextXLeft - (MaxLabelsWidth + lenghtTicks + extraPos);
                        MargLeft = MargLeft + extraMargin;
                    }

                    tChart1.Panel.MarginLeft = MargLeft;
                    tChart1.Panel.MarginRight = MargRight;

                }
                else
                {
                    s.CustomVertAxis.Visible = false;
                }
            }
        }

Source: stackoverflow.com

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