[chronojump] JumpsProfile better info when missing all indexes

[Xavier de Blas <xaviblas src gnome org>]

commit 880ebf187cf986cc1abac46f3c5e9fa8cc99edbb
Author: Xavier de Blas <xaviblas gmail com>
Date:   Thu Jul 7 17:13:19 2016 +0200

    JumpsProfile better info when missing all indexes

 src/gui/jumpsProfile.cs |   24 ++++++++++++++----------
 1 files changed, 14 insertions(+), 10 deletions(-)
---
diff --git a/src/gui/jumpsProfile.cs b/src/gui/jumpsProfile.cs
index a7bd99d..f7d48ff 100644
--- a/src/gui/jumpsProfile.cs
+++ b/src/gui/jumpsProfile.cs
@@ -34,25 +34,24 @@ public static class JumpsProfileGraph
                g.SetSourceRGB(1,1,1);
                g.Paint();
 
-               //3 calculate sum and return if empty
+               //3 calculate sum
                double sum = 0;
                foreach(JumpsProfileIndex jpi in l_jpi)
                        sum += jpi.Result;
                
-               if(sum == 0)
-                       return;
-               
                //4 prepare font
                g.SelectFontFace("Helvetica", Cairo.FontSlant.Normal, Cairo.FontWeight.Normal);
                int textHeight = 12;
                g.SetFontSize(textHeight);
 
                //5 plot arcs
-               double acc = 0; //accumulated
-               foreach(JumpsProfileIndex jpi in l_jpi) {
-                       double percent = 2 * jpi.Result / sum; //*2 to be in range 0*pi - 2*pi
-                       plotArc(200, 200, 150, acc, acc + percent, g, jpi.Color);
-                       acc += percent;
+               if(sum > 0 ) {
+                       double acc = 0; //accumulated
+                       foreach(JumpsProfileIndex jpi in l_jpi) {
+                               double percent = 2 * jpi.Result / sum; //*2 to be in range 0*pi - 2*pi
+                               plotArc(200, 200, 150, acc, acc + percent, g, jpi.Color);
+                               acc += percent;
+                       }
                }
 
                //6 draw legend at right
@@ -61,7 +60,12 @@ public static class JumpsProfileGraph
                //[1] 50 119 188 257 326 #difference is 69
                foreach(JumpsProfileIndex jpi in l_jpi) {
                        drawRoundedRectangle (400,  y, 40, 24, 6, g, jpi.Color);
-                       printText(460,  y, 24, textHeight, Util.TrimDecimals((100 * jpi.Result / sum),1) + 
jpi.Text, g);
+                       
+                       double percent = 0;
+                       if(sum > 0)
+                               percent = 100 * jpi.Result / sum;
+
+                       printText(460,  y, 24, textHeight, Util.TrimDecimals(percent, 1) + jpi.Text, g);
                        y += 69;
                }