month-view: hold a pointer to the singleton GcalManager

It'll be used in the next commit to save the DnD'ed event.

src/gcal-month-view.c

@@ -85,6 +85,7 @@ typedef struct
 
   /* property */
   icaltimetype   *date;
+  GcalManager    *manager;
 } GcalMonthViewPrivate;
 
 enum
@@ -2267,3 +2268,12 @@ gcal_month_view_set_use_24h_format (GcalMonthView *view,
   priv = gcal_month_view_get_instance_private (view);
   priv->use_24h_format = use_24h;
 }
+
+void
+gcal_month_view_set_manager (GcalMonthView *view,
+                             GcalManager   *manager)
+{
+  GcalMonthViewPrivate *priv = gcal_month_view_get_instance_private (view);
+
+  priv->manager = manager;
+}

src/gcal-month-view.h

@@ -53,6 +53,9 @@ void           gcal_month_view_set_first_weekday  (GcalMonthView *view,
 void           gcal_month_view_set_use_24h_format (GcalMonthView *view,
                                                    gboolean       use_24h);
 
+void           gcal_month_view_set_manager        (GcalMonthView *view,
+                                                   GcalManager   *manager);
+
 G_END_DECLS
 
 #endif /* __GCAL_MONTH_VIEW_H__ */

src/gcal-window.c

@@ -1507,6 +1507,7 @@ gcal_window_set_property (GObject      *object,
           g_signal_connect_swapped (self->manager, "source-changed", G_CALLBACK (source_changed), object);
 
           gcal_edit_dialog_set_manager (GCAL_EDIT_DIALOG (self->edit_dialog), self->manager);
+          gcal_month_view_set_manager (GCAL_MONTH_VIEW (self->month_view), self->manager);
           gcal_year_view_set_manager (GCAL_YEAR_VIEW (self->year_view), self->manager);
           gcal_quick_add_popover_set_manager (GCAL_QUICK_ADD_POPOVER (self->quick_add_popover), self->manager);
           gcal_source_dialog_set_manager (GCAL_SOURCE_DIALOG (self->source_dialog), self->manager);