timer: Improve duration api

- rename duration setter
- add duration getter

src/gcal-timer.c

@@ -262,8 +262,8 @@ gcal_timer_is_running (GcalTimer *self)
  * Changes the duration between two events.
  */
 void
-gcal_timer_set_duration (GcalTimer *self,
-                         gint64     duration)
+gcal_timer_set_default_duration (GcalTimer *self,
+                                 gint64     duration)
 {
   gint64 now;
 
@@ -283,6 +283,21 @@ gcal_timer_set_duration (GcalTimer *self,
 
 
 
+/**
+ * gcal_timer_get_default_duration:
+ * @self: The #GcalTimer.
+ *
+ * Returns the default duration.
+ */
+gint64
+gcal_timer_get_default_duration (GcalTimer *self)
+{
+  g_return_val_if_fail (self != NULL, -1);
+
+  return self->default_duration;
+}
+
+
 /**
  * gcal_timer_set_callback:
  * @self:   The #GcalTimer.

src/gcal-timer.h

@@ -38,9 +38,11 @@ void            gcal_timer_stop                   (GcalTimer       *self);
 
 gboolean        gcal_timer_is_running             (GcalTimer *self);
 
-void            gcal_timer_set_duration           (GcalTimer       *self,
+void            gcal_timer_set_default_duration   (GcalTimer       *self,
                                                    gint64           duration);
 
+gint64          gcal_timer_get_default_duration   (GcalTimer *self);
+
 void            gcal_timer_set_callback           (GcalTimer       *self,
                                                    GCalTimerFunc    func,
                                                    gpointer         data,

src/gcal-weather-service.c

@@ -1235,7 +1235,7 @@ static void
 update_timeout_interval (GcalWeatherService *self)
 {
   g_return_if_fail (GCAL_IS_WEATHER_SERVICE (self));
-  gcal_timer_set_duration (self->timer, self->check_interval_renew);
+  gcal_timer_set_default_duration (self->timer, self->check_interval_renew);
 }