[chronojump] Jumps profile draws a white area if some indexes are not > 0 or not exist

[Xavier de Blas <xaviblas src gnome org>]

commit ff31025cc44f6a30ae543de733ae95aebc8473fe
Author: Xavier de Blas <xaviblas gmail com>
Date:   Thu Jan 7 19:51:04 2021 +0100

    Jumps profile draws a white area if some indexes are not > 0 or not exist

 src/gui/cairo/jumpsProfile.cs | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)
---
diff --git a/src/gui/cairo/jumpsProfile.cs b/src/gui/cairo/jumpsProfile.cs
index c20940d4..25981b6e 100644
--- a/src/gui/cairo/jumpsProfile.cs
+++ b/src/gui/cairo/jumpsProfile.cs
@@ -67,6 +67,9 @@ public static class JumpsProfileGraph
                g.Paint();
 
                //3 calculate sum
+               //but is not needed, because sum has to be dja
+               //so if we have sum = 1 we can plot grey areas when not all indexes are calculated
+               //so later sum will be 1, now is ok to just show an error message
                double sum = 0;
                foreach(JumpsProfileIndex jpi in l_jpi)
                        if(jpi.Result >= 0)
@@ -87,18 +90,30 @@ public static class JumpsProfileGraph
                        return;
                }
 
-
                //5 plot arcs
-               if(sum > 0 ) {
+               if(sum > 0 )
+               {
                        double acc = 0; //accumulated
+                       bool someIndexNotPositive = false; //is not positive if does not exist (need jumps) 
or is negative
                        foreach(JumpsProfileIndex jpi in l_jpi) {
-                               double percent = 2 * jpi.Result / sum; //*2 to be in range 0*pi - 2*pi
+                               //double percent = 2 * jpi.Result / sum; //*2 to be in range 0*pi - 2*pi
+                               double percent = 2 * jpi.Result / 1; //*2 to be in range 0*pi - 2*pi
+                               //LogB.Information("percent: " + percent.ToString());
+
                                if(percent > 0)
                                {
                                        plotArc(200, 200, 150, acc -.5, acc + percent -.5, g, jpi.Color); 
//-.5 to start at top of the pie
                                        acc += percent;
-                               }
+                               } else
+                                       someIndexNotPositive = true;
                        }
+                       if(someIndexNotPositive) //then draw in white to complete the circle
+                       {
+                               //Cairo.Color white90 = new Cairo.Color(233/256.0, 233/256.0, 233/256.0);
+                               Cairo.Color white100 = new Cairo.Color(1,1,1);
+                               plotArc(200, 200, 150, acc -.5, 2 -.5, g, white100); //-.5 to start at top of 
the pie
+                       }
+
                        //fix last radius line, because ClosePath has been disabled
                        g.MoveTo (200,50);
                        g.LineTo (200, 200);