views: Redraw week view after changing week-start-day

Part-of: <https://gitlab.gnome.org/GNOME/gnome-calendar/-/merge_requests/822>

src/gui/views/gcal-week-grid.c

@@ -1302,3 +1302,17 @@ gcal_week_grid_set_date (GcalWeekGrid *self,
   invalidate_layout_blocks (self);
 }
 
+/**
+ * gcal_week_grid_redraw:
+ * @self: a #GcalWeekGrid
+ *
+ * Triggers a redraw of the grid after e.g.
+ * changing the start day of week.
+ */
+void
+gcal_week_grid_redraw (GcalWeekGrid *self)
+{
+  g_assert (GCAL_IS_WEEK_GRID (self));
+
+  invalidate_layout_blocks (self);
+}

src/gui/views/gcal-week-grid.h

@@ -45,6 +45,8 @@ void                 gcal_week_grid_clear_marks                  (GcalWeekGrid
 void                 gcal_week_grid_set_date                     (GcalWeekGrid       *self,
                                                                   GDateTime          *date);
 
+void                 gcal_week_grid_redraw                       (GcalWeekGrid       *self);
+
 G_END_DECLS
 
 #endif /* GCAL_WEEK_GRID_H */

src/gui/views/gcal-week-header.c

@@ -1907,3 +1907,22 @@ gcal_week_header_set_expanded (GcalWeekHeader *self,
 
   g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_EXPANDED]);
 }
+
+/**
+ * gcal_week_header_redraw:
+ * @self: a #GcalWeekHeader
+ *
+ * Triggers a redraw of the week header
+ * after changing the start day of week.
+ */
+void
+gcal_week_header_redraw (GcalWeekHeader *self)
+{
+  g_assert (GCAL_IS_WEEK_HEADER (self));
+
+  update_title (self);
+  gtk_widget_queue_draw (GTK_WIDGET (self));
+
+  update_unchanged_events (self, self->active_date);
+  update_weather_infos (self);
+}

src/gui/views/gcal-week-header.h

@@ -50,6 +50,8 @@ gboolean             gcal_week_header_get_expanded               (GcalWeekHeader
 void                 gcal_week_header_set_expanded               (GcalWeekHeader     *self,
                                                                   gboolean            expanded);
 
+void                 gcal_week_header_redraw                     (GcalWeekHeader     *self);
+
 G_END_DECLS
 
 #endif /* GCAL_WEEK_HEADER_H */

src/gui/views/gcal-week-view.c

@@ -464,6 +464,15 @@ gcal_week_view_get_previous_date (GcalView *view)
   return g_date_time_add_weeks (self->date, -1);
 }
 
+static void
+gcal_week_view_first_weekday_changed (GcalView *view)
+{
+  GcalWeekView *self = GCAL_WEEK_VIEW (view);
+
+  gcal_week_header_redraw (GCAL_WEEK_HEADER (self->header));
+  gcal_week_grid_redraw (GCAL_WEEK_GRID (self->week_grid));
+}
+
 static void
 gcal_view_interface_init (GcalViewInterface *iface)
 {
@@ -473,6 +482,7 @@ gcal_view_interface_init (GcalViewInterface *iface)
   iface->clear_marks = gcal_week_view_clear_marks;
   iface->get_next_date = gcal_week_view_get_next_date;
   iface->get_previous_date = gcal_week_view_get_previous_date;
+  iface->first_weekday_changed = gcal_week_view_first_weekday_changed;
 }