[gnome-clocks] Fix start timer button styling

[Paolo Borelli <pborelli src gnome org>]

commit 0d9efed18cf18509517482a7de6a5d50d721c695
Author: Paolo Borelli <pborelli gnome org>
Date:   Fri Aug 17 01:02:19 2012 +0200

    Fix start timer button styling
    
    Apply "clocks-gp" class to the start timer button only when sensitive

 gnomeclocks/timer.py |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gnomeclocks/timer.py b/gnomeclocks/timer.py
index 8c1e543..80b9d4b 100644
--- a/gnomeclocks/timer.py
+++ b/gnomeclocks/timer.py
@@ -190,8 +190,10 @@ class TimerWelcomeScreen (Gtk.Box):
         seconds = self.seconds.get_value()
         if hours == 0 and minutes == 0 and seconds == 0:
             self.startButton.set_sensitive(False)
+            self.startButton.get_style_context ().remove_class ("clocks-go")
         else:
             self.startButton.set_sensitive(True)
+            self.startButton.get_style_context ().add_class ("clocks-go")
 
     def _on_start_clicked(self, data):
         if self.timer.state == 0: