[chronojump] jumpsRjFatigue divide in two and shows avgs

[Xavier de Blas <xaviblas src gnome org>]

commit 0d743a0930c0c1db4bd68e2fe1dfe4db3dccb343
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon Aug 17 12:50:04 2020 +0200

    jumpsRjFatigue divide in two and shows avgs

 src/gui/cairo/jumpsRjFatigue.cs | 52 +++++++++++++++++++++++++++++++++++++++++
 src/gui/cairo/xy.cs             |  2 +-
 2 files changed, 53 insertions(+), 1 deletion(-)
---
diff --git a/src/gui/cairo/jumpsRjFatigue.cs b/src/gui/cairo/jumpsRjFatigue.cs
index f3034814..9896b775 100644
--- a/src/gui/cairo/jumpsRjFatigue.cs
+++ b/src/gui/cairo/jumpsRjFatigue.cs
@@ -75,7 +75,12 @@ public class JumpsRjFatigueGraph : CairoXY
                paintGrid(gridTypes.VERTICALLINES, false);
                paintAxis();
 
+               g.Color = red;
                plotPredictedLine(predictedLineTypes.STRAIGHT, predictedLineCrossMargins.TOUCH);
+               g.Color = black;
+
+               divideInTwoAndPlotAverage();
+
                plotRealPoints(true);
 
                writeTitle();
@@ -102,4 +107,51 @@ public class JumpsRjFatigueGraph : CairoXY
                writeTextAtRight(ypos++, date, false);
        }
 
+       private void divideInTwoAndPlotAverage()
+       {
+               List<PointF> point_l_start = new List<PointF>();
+               List<PointF> point_l_end = new List<PointF>();
+               double sumIni = 0;
+               double sumEnd = 0;
+
+               int i = 0;
+               foreach(PointF point in point_l)
+               {
+                       if(i < Math.Floor(point_l.Count / 2.0))
+                       {
+                               point_l_start.Add(point);
+                               sumIni += point.Y;
+                               //LogB.Information(string.Format("Added to point_l_start: {0}", point));
+                       }
+                       if(point_l.Count - i -1 < Math.Floor(point_l.Count / 2.0))
+                       {
+                               point_l_end.Add(point);
+                               sumEnd += point.Y;
+                               //LogB.Information(string.Format("Added to point_l_end: {0}", point));
+                       }
+
+                       i ++;
+               }
+
+               double avgIni = sumIni / point_l_start.Count;
+               double avgEnd = sumEnd / point_l_end.Count;
+
+               g.MoveTo(calculatePaintX(point_l_start[0].X), calculatePaintY(avgIni));
+               g.LineTo(calculatePaintX(point_l_start[point_l_start.Count -1].X), calculatePaintY(avgIni));
+               printText(
+                               //Convert.ToInt32(calculatePaintX(point_l_start[0].X)) -2,
+                               graphWidth - outerMargins,
+                               Convert.ToInt32(calculatePaintY(avgIni)),
+                               0, textHeight, Util.TrimDecimals(avgIni, 2), g, alignTypes.CENTER);
+
+               g.MoveTo(calculatePaintX(point_l_end[0].X), calculatePaintY(avgEnd));
+               g.LineTo(calculatePaintX(point_l_end[point_l_end.Count -1].X), calculatePaintY(avgEnd));
+               printText(
+                               //Convert.ToInt32(calculatePaintX(point_l_end[point_l_end.Count -1].X)) +2,
+                               graphWidth - outerMargins,
+                               Convert.ToInt32(calculatePaintY(avgEnd)),
+                               0, textHeight, Util.TrimDecimals(avgEnd, 2), g, alignTypes.CENTER);
+
+               g.Stroke ();
+       }
 }
diff --git a/src/gui/cairo/xy.cs b/src/gui/cairo/xy.cs
index 9039ea60..9909c90a 100644
--- a/src/gui/cairo/xy.cs
+++ b/src/gui/cairo/xy.cs
@@ -69,7 +69,7 @@ public abstract class CairoXY
        protected int graphWidth;
        protected int graphHeight;
 
-       Cairo.Color black;
+       protected Cairo.Color black;
        Cairo.Color white;
        protected Cairo.Color red;
        Cairo.Color blue;