Showing the value in a GtkTreeViewColumn depending on a condition

[Tilman Sauerbeck <tilman sauerbeck web de>]

Hi,
I'm having a GtkTreeView with a bunch of columns which I fill with
gtk_tree_store_append(); and
gtk_tree_store_set();

I'd like the value in column X only to be shown on root level tree items, not on any child items.

Is there some special value I set to the tree store so it doesn't get displayed? ;)
Is there any other (simple *g*) way to do this?

Thanks in advance,
Tilman

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