[gnome-calendar] month-view: add selection background fill

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 8a72bf0ce7649a0107d94dba1a731532126bad1e
Author: fosero <fosero users noreply github com>
Date:   Tue Mar 8 18:11:24 2016 +0100

    month-view: add selection background fill
    
    https://bugzilla.gnome.org/show_bug.cgi?id=763217

 src/gcal-month-view.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/src/gcal-month-view.c b/src/gcal-month-view.c
index 407b53e..59d9c42 100644
--- a/src/gcal-month-view.c
+++ b/src/gcal-month-view.c
@@ -1762,8 +1762,11 @@ gcal_month_view_draw (GtkWidget *widget,
          cairo_line_to (cr, start_x, start_y);
        }
 
-     cairo_stroke (cr);
-   }
+     cairo_stroke_preserve (cr);
+     /* selection background fill */
+     cairo_set_source_rgba(cr, color.red, color.green, color.blue, 0.1);
+     cairo_fill(cr);
+  }
 
   /* Draw focus rectangle */
   if (priv->keyboard_cell > priv->days_delay - 1)