columnviewcolumn: Add private api to set the position

This is needed to make columns reorder their cells when
their position in the column views list of columns
changes.

1 files changed, 19 insertions, 0 deletions

diff --git a/gtk/gtkcolumnviewcolumn.c b/gtk/gtkcolumnviewcolumn.c
index 0567931905..dd8a4cd3a4 100644
--- a/gtk/gtkcolumnviewcolumn.c
+++ b/gtk/gtkcolumnviewcolumn.c
@@ -625,6 +625,25 @@ gtk_column_view_column_set_column_view (GtkColumnViewColumn *self,
   g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_COLUMN_VIEW]);
 }
 
+void
+gtk_column_view_column_set_position (GtkColumnViewColumn *self,
+                                     guint                position)
+{
+  GtkColumnViewCell *cell;
+
+  gtk_list_item_widget_reorder_child (gtk_column_view_get_header_widget (self->view),
+                                      self->header,
+                                      position);
+
+  for (cell = self->first_cell; cell; cell = gtk_column_view_cell_get_next (cell))
+    {
+      GtkListItemWidget *list_item;
+
+      list_item = GTK_LIST_ITEM_WIDGET (gtk_widget_get_parent (GTK_WIDGET (cell)));
+      gtk_list_item_widget_reorder_child (list_item, GTK_WIDGET (cell), position);
+    }
+}
+
 /**
  * gtk_column_view_column_get_factory:
  * @self: a #GtkColumnViewColumn