insertAfter
Inserts a new row after @sibling.
If @sibling is null, then the row will be prepended to @parent’s children.
If @parent and @sibling are null, then the row will be prepended to the toplevel.
If both @sibling and @parent are set, then @parent must be the parent of @sibling. When @sibling is set, @parent is optional.
The @iter parameter will be changed to point to this new row. The row will be empty after this function is called. To fill in values, you need to call gtk_tree_store_set() or gtk_tree_store_set_value().
Parameters
iter
An unset GtkTreeIter
to set to the new row
parent
A valid GtkTreeIter
sibling
A valid GtkTreeIter