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

namespace ExampleLibrary
{
    using OxyPlot;
    using OxyPlot.Annotations;
    using OxyPlot.Axes;

    [Examples("PolylineAnnotation"), Tags("Annotations")]
    public static class PolylineAnnotationExamples
    {
        [Example("PolylineAnnotation")]
        public static PlotModel PolylineAnnotations()
        {
            var model = new PlotModel { Title = "PolylineAnnotation" };
            model.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom, Minimum = 0, Maximum = 30 });
            model.Axes.Add(new LinearAxis { Position = AxisPosition.Left, Minimum = 0, Maximum = 30 });
            var a1 = new PolylineAnnotation { Text = "Polyline" };
            a1.Points.AddRange(new[] { new DataPoint(0, 10), new DataPoint(5, 5), new DataPoint(20, 1), new DataPoint(30, 20) });
            var a2 = new PolylineAnnotation
            {
                InterpolationAlgorithm = InterpolationAlgorithms.CanonicalSpline,
                Text = "Smooth Polyline"
            };
            a2.Points.AddRange(new[] { new DataPoint(0, 15), new DataPoint(3, 23), new DataPoint(9, 30), new DataPoint(20, 12), new DataPoint(30, 10) });
            model.Annotations.Add(a1);
            model.Annotations.Add(a2);
            return model;
        }

        [Example("Koch Surfaces")]
        public static PlotModel KochSurface()
        {
            DataPoint[] plane(DataPoint centre)
            {
                return new[]
                {
                    new DataPoint(centre.X - 1, centre.Y),
                    new DataPoint(centre.X + 1, centre.Y),
                };
            }

            var model = new PlotModel { Title = "PolygonAnnotation", PlotType = PlotType.Cartesian };
            model.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom, Minimum = -2, Maximum = 2 });
            model.Axes.Add(new LinearAxis { Position = AxisPosition.Left, Minimum = -2, Maximum = 2 });

            var a1 = new PolylineAnnotation { Text = "MSL = 4", MinimumSegmentLength = 4, LineStyle = LineStyle.Solid, TextPosition = new DataPoint(0, 1) };
            a1.Points.AddRange(PolygonAnnotationExamples.KochFractal(plane(new DataPoint(0, 1)), 8, true, false));
            model.Annotations.Add(a1);

            var a2 = new PolylineAnnotation { Text = "MSL = 2", MinimumSegmentLength = 2, LineStyle = LineStyle.Solid, TextPosition = new DataPoint(0, 0) };
            a2.Points.AddRange(PolygonAnnotationExamples.KochFractal(plane(new DataPoint(0, 0)), 8, true, false));
            model.Annotations.Add(a2);

            var a3 = new PolylineAnnotation { Text = "MSL = 1", MinimumSegmentLength = 1, LineStyle = LineStyle.Solid, TextPosition = new DataPoint(0, -1) };
            a3.Points.AddRange(PolygonAnnotationExamples.KochFractal(plane(new DataPoint(0, -1)), 8, true, false));
            model.Annotations.Add(a3);

            return model;
        }
    }
}