[chronojump] encoder rhythm simulates eccentric and concentric phase

[Xavier de Blas <xaviblas src gnome org>]

commit efc849dd2c198332f6f17dd7c143415ec07175ab
Author: Xavier de Blas <xaviblas gmail com>
Date:   Wed Jan 17 11:29:14 2018 +0100

    encoder rhythm simulates eccentric and concentric phase

 src/gui/encoder.cs |   28 +++++++++++++++++++++++++++-
 1 files changed, 27 insertions(+), 1 deletions(-)
---
diff --git a/src/gui/encoder.cs b/src/gui/encoder.cs
index ccac7f2..e718bcd 100644
--- a/src/gui/encoder.cs
+++ b/src/gui/encoder.cs
@@ -6014,19 +6014,45 @@ public partial class ChronoJumpWindow
                }
        }
 
+       //TODO: create a class will all encoder rhythm stuff
        private void updatePulsebarRhythm()
        {
                //at first repetition don't show pulsebar rhythm (wait first repetition ended)
                if(lastRepetitionDT == DateTime.MinValue)
                {
                        encoder_pulsebar_rhythm.Fraction = 0;
+                       encoder_pulsebar_rhythm.Visible = false;
                        return;
                }
 
+               encoder_pulsebar_rhythm.Visible = true;
+
                TimeSpan span = DateTime.Now - lastRepetitionDT;
                double totalSeconds = span.TotalSeconds;
 
-               encoder_pulsebar_rhythm.Fraction = Util.DivideSafeFraction(totalSeconds, 1.0);
+               //this goes up from 0 to 1 second and beyond
+               //encoder_pulsebar_rhythm.Fraction = Util.DivideSafeFraction(totalSeconds, 1.0);
+               //this simulates ecc and con
+               double phase = Util.DivideSafeFraction(totalSeconds, 1.0);
+               if(phase < 0.5)
+               {
+                       //totalSeconds == 0 graph will show 1
+                       //totalSeconds == 0.1 graph will show 0.8
+                       //totalSeconds == 0.4 graph will show 0.2
+                       encoder_pulsebar_rhythm.Fraction = 1 - (phase * 2);
+               }
+               else {
+                       //totalSeconds == 0.5 graph will show 0
+                       //totalSeconds == 0.75 graph will show 0.5
+                       //totalSeconds == 0.9 graph will show 0.8
+                       //totalSeconds >= 1 graph will show 1
+                       double phaseSup = phase - .5;
+                       double fraction = phaseSup * 2;
+                       if(fraction > 1)
+                               fraction = 1;
+                       encoder_pulsebar_rhythm.Fraction = fraction;
+               }
+
                if(totalSeconds >= 1)
                        image_encoder_rhythm.Visible = true;
        }