AirScout/OxyPlot/Source/Examples/ExampleLibrary/Axes/CustomAxisExamples.cs

// --------------------------------------------------------------------------------------------------------------------
// <copyright file="CustomAxisExamples.cs" company="OxyPlot">
//   Copyright (c) 2014 OxyPlot contributors
// </copyright>
// --------------------------------------------------------------------------------------------------------------------

namespace ExampleLibrary
{
    using System.Collections.Generic;

    using OxyPlot;
    using OxyPlot.Axes;

    [Examples("Custom axes"), Tags("Axes")]
    public static class CustomAxisExamples
    {
        public class ArrowAxis : LinearAxis
        {
            public override void Render(IRenderContext rc, int pass)
            {
                base.Render(rc, pass);
                var points = new List<ScreenPoint>();
                if (this.IsHorizontal())
                {
                    var xmax = this.Transform(this.ActualMaximum);
                    points.Add(new ScreenPoint(xmax + 4, this.PlotModel.PlotArea.Bottom - 4));
                    points.Add(new ScreenPoint(xmax + 18, this.PlotModel.PlotArea.Bottom));
                    points.Add(new ScreenPoint(xmax + 4, this.PlotModel.PlotArea.Bottom + 4));
                    //// etc.
                }
                else
                {
                    var ymax = this.Transform(this.ActualMaximum);
                    points.Add(new ScreenPoint(this.PlotModel.PlotArea.Left - 4, ymax - 4));
                    points.Add(new ScreenPoint(this.PlotModel.PlotArea.Left, ymax - 18));
                    points.Add(new ScreenPoint(this.PlotModel.PlotArea.Left + 4, ymax - 4));
                    //// etc.
                }

                rc.DrawPolygon(points, OxyColors.Black, OxyColors.Undefined);
            }
        }

        [Example("ArrowAxis")]
        public static PlotModel CustomArrowAxis()
        {
            var model = new PlotModel { PlotAreaBorderThickness = new OxyThickness(0), PlotMargins = new OxyThickness(60, 60, 60, 60) };
            model.Axes.Add(new ArrowAxis { Position = AxisPosition.Bottom, AxislineStyle = LineStyle.Solid });
            model.Axes.Add(new ArrowAxis { Position = AxisPosition.Left, AxislineStyle = LineStyle.Solid });
            return model;
        }
    }
}