How to expand all items in a GtkTreeView at start

Question

Can any one tell me how to set tree view attribute so that all tree items can show up by default?

The first image shows what I get and the second image shows what I would like to get automatically, that is, to expand the GtkTreeView without clicking the expander.

Answer 1

You have not specified the language. In C, you should call gtk_tree_view_expand_all(). In Python you should call my_tree.expand_all()