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DataDisplay/Graph/LineGraph.cs

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+using DataDisplay.Common;
+using DataDisplay.DataSource;
+using SkiaSharp;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace DataDisplay.Graph
+{
+  public class LineGraph
+  {
+    private SKPoint[] points=null;
+    private CompositeDataSource compositeDataSource;
+    private SKPaint paint;
+
+    public LineGraph(SKPaint paint,CompositeDataSource compositeDataSource)
+    {
+      this.compositeDataSource = compositeDataSource;
+      this.paint=paint;
+      points=GetSKPoints();
+    }
+    public void SetPaint(SKPaint paint)
+    {
+      this.paint=paint;
+    }
+    public void SetDataSource(CompositeDataSource compositeDataSource)
+    {
+      this.compositeDataSource=compositeDataSource;
+      points=GetSKPoints();
+    }
+    public void Render(SKCanvas canvas,PointMapping pointMapping)
+    {
+      if(null==points)return;
+      SKPoint[] mappedPoints = new SKPoint[points.Length];
+      for (int index = 0; index < points.Length; index++) mappedPoints[index] = pointMapping.MapPoint(points[index]);
+      canvas.DrawPoints(SKPointMode.Polygon,mappedPoints,paint);
+    }
+    public SKPoint[] GetSKPoints()
+    {
+      IEnumerable<SKPoint> pointsEnumerable=DataSourceHelper.GetPoints(compositeDataSource);
+      IEnumerator<SKPoint> pointsEnumerator=pointsEnumerable.GetEnumerator();
+      List<SKPoint> points=new List<SKPoint>();
+      while(pointsEnumerator.MoveNext())points.Add(pointsEnumerator.Current);
+      return points.ToArray();
+    }
+    public SKPoint[] SKPoints
+    {
+      get{return points;}
+      private set{;}
+    }
+    public double GetXExtent()
+    {
+      if(null==points)return 0.00;
+      double xExtents=points.Max(x=>x.X);
+      return xExtents;
+    }
+    public double GetXExtentMin()
+    {
+      if(null==points)return 0.00;
+      double xExtents=points.Min(x=>x.X);
+      return xExtents;
+    }
+    public double GetYExtent()
+    {
+      if(null==points)return 0.00;
+      double yExtents=points.Max(x=>x.Y);
+      return yExtents;
+    }
+    public double GetYExtentMin()
+    {
+      if(null==points)return 0.00;
+      double yExtents=points.Min(x=>x.Y);
+      return yExtents;
+    }
+  }
+}