[chronojump] Cairo jumps by years now can show also months if X resolution is high

[Xavier de Blas <xaviblas src gnome org>]

commit b4ece02589d52b861b6c6b47111288728e174e9e
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon Jan 13 12:14:12 2020 +0100

    Cairo jumps by years now can show also months if X resolution is high

 src/gui/cairo/jumpsEvolution.cs | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/src/gui/cairo/jumpsEvolution.cs b/src/gui/cairo/jumpsEvolution.cs
index 723761ab..b1a17c6a 100644
--- a/src/gui/cairo/jumpsEvolution.cs
+++ b/src/gui/cairo/jumpsEvolution.cs
@@ -93,6 +93,16 @@ public class JumpsEvolutionGraph : CairoXY
                g.SetDash(new double[]{1, 2}, 0);
 
                bool paintMonths = (Convert.ToInt32(Math.Floor(maxX)) - Convert.ToInt32(Math.Floor(minX)) < 
3); //paint months if few years
+               //or if years are very separated (high X resolution)
+               if(! paintMonths)
+               {
+                       int year = Convert.ToInt32(Math.Floor(minX)) -1;
+                       int xtemp1 = Convert.ToInt32(calculatePaintX(year, graphWidth, maxX, minX, 
outerMargins + innerMargins, outerMargins + innerMargins));
+                       int xtemp2 = Convert.ToInt32(calculatePaintX(year + 1, graphWidth, maxX, minX, 
outerMargins + innerMargins, outerMargins + innerMargins));
+                       if(xtemp2 - xtemp1 > 500)
+                               paintMonths = true;
+
+               }
 
                //-1 to start on previous year to see last months (if fit into graph)
                for(int year = Convert.ToInt32(Math.Floor(minX)) -1; year <= 
Convert.ToInt32(Math.Floor(maxX)); year ++)