[chronojump] raceAnalyzer capture speed graph with arrow and text on background color

[Xavier de Blas <xaviblas src gnome org>]

commit 0861027748329a68140f2985c533fa1e46833eda
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Dec 18 15:00:59 2020 +0100

    raceAnalyzer capture speed graph with arrow and text on background color

 src/gui/cairo/radial.cs | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)
---
diff --git a/src/gui/cairo/radial.cs b/src/gui/cairo/radial.cs
index 25b0b43b..7c1cd196 100644
--- a/src/gui/cairo/radial.cs
+++ b/src/gui/cairo/radial.cs
@@ -36,7 +36,7 @@ public class CairoRadial
        private int graphHeight;
        private double minSide;
        private Cairo.Color black;
-       private Cairo.Color red;
+       private Cairo.Color colorArrow;
        private Cairo.Color gray;
 
        public CairoRadial (Gtk.DrawingArea area, string font)
@@ -72,10 +72,7 @@ public class CairoRadial
 
                black = colorFromRGB(0,0,0);
                gray = colorFromRGB(99,99,99); //gray99
-               //white = colorFromRGB(255,255,255);
-               red = colorFromRGB(200,0,0);
-               //blue = colorFromRGB(178, 223, 238); //lightblue
-               //bluePlots = colorFromRGB(0, 0, 200);
+               colorArrow = colorFromGdk(Config.ColorBackground);
 
                g.Color = black;
                minSide = graphWidth;
@@ -110,11 +107,11 @@ public class CairoRadial
                /*
                //TEST:
                g.LineWidth = 2;
-               graphLineFromCenter(3, red);
+               graphLineFromCenter(3, colorArrow);
                printText(Convert.ToInt32(margin + graphWidth/2),
                                Convert.ToInt32(margin + (.66 * graphHeight)),
                                0, textHeight, "Speed: 3 m/s", g, alignTypes.CENTER);
-               */
+                               */
        }
 
        //TODO: currently max is 20
@@ -135,14 +132,14 @@ public class CairoRadial
                //g.SetSourceRGB(0.5, 0.5, 0.5);
 
                g.LineWidth = 2;
-               graphLineFromCenter(speed, red);
-               if(speedMax > speed)
-                       graphLineFromCenter(speedMax, gray);
-
+               graphLineFromCenter(speed, colorArrow);
                printText(Convert.ToInt32(margin + graphWidth/2),
                                Convert.ToInt32(margin + (.66 * graphHeight)),
                                0, textHeight, "Speed: " + Util.TrimDecimals(speed, 1) + " m/s", g, 
alignTypes.CENTER);
 
+               if(speedMax > speed)
+                       graphLineFromCenter(speedMax, gray);
+
                endGraphDisposing();
        }
 
@@ -173,7 +170,11 @@ public class CairoRadial
        {
                return new Cairo.Color(red/256.0, green/256.0, blue/256.0);
        }
-       
+       protected Cairo.Color colorFromGdk(Gdk.Color color)
+       {
+               return new Cairo.Color(color.Red/65536.0, color.Green/65536.0, color.Blue/65536.0);
+       }
+
        private enum alignTypes { LEFT, CENTER, RIGHT }
        private void printText (int x, int y, int height, int textHeight, string text, Cairo.Context g, 
alignTypes align)
        {