views: use the new GcalClock to redraw

Instead of having each view manage it's own timeout (or
even worse, making GcalWindow manage it), use the newly
introduced GcalClock API to do that.

src/views/gcal-week-header.c

@@ -67,7 +67,6 @@ struct _GcalWeekHeader
   gboolean          expanded;
 
   gboolean          use_24h_format;
-  gint              redraw_timeout_id;
 
   icaltimetype     *active_date;
 
@@ -976,14 +975,6 @@ on_expand_action_activated (GcalWeekHeader *self,
     header_expand (self);
 }
 
-static gboolean
-on_redraw_timeout_cb (gpointer data)
-{
-  gtk_widget_queue_draw (data);
-
-  return G_SOURCE_CONTINUE;
-}
-
 /* Drawing area content and size */
 static gdouble
 get_weekday_names_height (GtkWidget *widget)
@@ -1038,12 +1029,6 @@ gcal_week_header_finalize (GObject *object)
 
   g_clear_pointer (&self->active_date, g_free);
 
-  if (self->redraw_timeout_id > 0)
-    {
-      g_source_remove (self->redraw_timeout_id);
-      self->redraw_timeout_id = 0;
-    }
-
   for (i = 0; i < 7; i++)
     g_list_free (self->events[i]);
 }
@@ -1292,14 +1277,6 @@ gcal_week_header_draw (GtkWidget      *widget,
 
   GTK_WIDGET_CLASS (gcal_week_header_parent_class)->draw (widget, cr);
 
-  /* Fire the redraw timeout if needed */
-  if (self->redraw_timeout_id == 0)
-    {
-      self->redraw_timeout_id = g_timeout_add_seconds (5,
-                                                       (GSourceFunc) on_redraw_timeout_cb,
-                                                       self);
-    }
-
   g_clear_pointer (&week_start, g_date_time_unref);
   g_clear_pointer (&week_end, g_date_time_unref);
 
@@ -1526,6 +1503,11 @@ gcal_week_header_set_manager (GcalWeekHeader *self,
   g_return_if_fail (GCAL_IS_WEEK_HEADER (self));
 
   self->manager = manager;
+
+  g_signal_connect_swapped (gcal_manager_get_clock (manager),
+                            "day-changed",
+                            G_CALLBACK (gtk_widget_queue_draw),
+                            self);
 }
 
 void