week-header: reposition present events on changing active date.

When an event lasts beyond the active week, the event placement doesn't change on changing the week.

We removed all the present events and added them to the list of events to be added to reposition them.

src/views/gcal-week-header.c

@@ -63,6 +63,8 @@ static void           update_headers                        (GcalWeekHeader *sel
 
 static void           place_events                          (GcalWeekHeader *self);
 
+static void           clear_current_events                  (GcalWeekHeader *self);
+
 static void           gcal_week_header_finalize             (GObject *object);
 
 static void           gcal_week_header_get_property         (GObject    *object,
@@ -237,6 +239,28 @@ place_events (GcalWeekHeader *self)
     g_list_free (iter);
 }
 
+static void
+clear_current_events (GcalWeekHeader *self)
+{
+  GList *children, *l;
+
+  children = g_list_copy (gtk_container_get_children (GTK_CONTAINER (self->grid)));
+
+  for (l = children; l != NULL; l = l->next)
+    {
+      if (!GCAL_IS_EVENT_WIDGET (l->data))
+        continue;
+
+      /* Add current events to events list to add later if necessary */
+      self->events = g_list_append (self->events,
+                                    gcal_event_widget_get_event (l->data));
+
+      gtk_widget_destroy (l->data);
+    }
+
+  g_list_free (children);
+}
+
 static void
 gcal_week_header_finalize (GObject *object)
 {
@@ -313,6 +337,7 @@ gcal_week_header_set_property (GObject      *object,
       self->active_date = g_value_dup_boxed (value);
 
       update_headers (self);
+      clear_current_events (self);
       place_events (self);
 
       gtk_widget_queue_draw (self->draw_area);
@@ -573,6 +598,7 @@ gcal_week_header_set_current_date (GcalWeekHeader *self,
   self->current_date = gcal_dup_icaltime (current_date);
 
   update_headers (self);
+  clear_current_events (self);
   place_events (self);
 
   gtk_widget_queue_draw (self->draw_area);