+ // get the iterator for the given index, returns false if invalid
+ bool GtkGetIteratorFor(unsigned pos, _GtkTreeIter *iter) const;
+
+ // get the index for the given iterator, return wxNOT_FOUND on failure
+ int GtkGetIndexFor(_GtkTreeIter& iter) const;
+
+ // set the specified item
+ void GtkSetItem(_GtkTreeIter& iter, const _GtkTreeEntry *entry);
+
+ // common part of DoSetFirstItem() and EnsureVisible()
+ void DoScrollToCell(int n, float alignY, float alignX);