GTK in C, Treeview items not showing

I'm working on an app in C with GTK 3, the issue I'm having is my treeviews have blank items, the treeviews get filled, but I can't see any text, it's just a bunch of blank items I can select. I created a function so when I click on an item it prints it's value, and it prints the correct value, it's just not displaying the values in the treeview.
Here's a screenshot:
Attachment 12422

Here's a little code snippet of how I'm creating my treeviews and adding data:

Code:

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GtkTreeIter iter;
GtkCellRenderer *text_cell = gtk_cell_renderer_text_new();
GtkListStore *library_model = gtk_list_store_new(1, G_TYPE_STRING);
gtk_list_store_append(library_model, &iter);
gtk_list_store_set(library_model, &iter, 0, "Item", -1);
   
GtkWidget *library_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(library_model));
  gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(library_view), 0, "Library", text_cell, NULL);

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Obviously there's more to my code, but that's how I'm creating my treeviews, and adding items to them. Any help is greatly apprecieated

This particular forum is for strictly just ANSI C. We don't support libraries here... I'd like to help but I really have no idea why it wouldn't, according to the man page for gtk_list_store_set it looks like you're using it correctly. Try posting in the Linux dev forum.

I don't know about GTK 3, but in GTK 2.24 (latest maintained version in Windows), there is a "demo" directory in the dev package which demonstrates all widgets. It defines two sample callback functions in particular for your interest: do_tree_store and do_list_store which you can connect into your program.

I don't do GTK so I could only connect them into the "Hello World" program suggested by the tutorial and they work well enough in this context. As a general approach, why not start from one of these demos and modify it. Then you can compile at stages and see what leads to do the problem.

The problem is with your call to gtk_tree_view_insert_column_with_attributes; you're missing two parameters. Try the following:

Code:

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gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(library_view), 0, "Library", text_cell, "text", 0, (void *) 0);

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EDIT: See this for more info.: GtkTreeViewColumn

Quote:

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Originally Posted by Barney McGrew

The problem is with your call to gtk_tree_view_insert_column_with_attributes; you're missing two parameters. Try the following:

Code:

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gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(library_view), 0, "Library", text_cell, "text", 0, (void *) 0);

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EDIT: See this for more info.: GtkTreeViewColumn

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This is right, I actually just figured it out after looking at some other examples and playing with my code, well, the only thing I needed to add was "text", not (void *), NULL works just fine, in fact the manpages say to end with NULL. Thanks for all the replies everyone, I always come to this forum for help because it's never failed me :D

Well, whether you use NULL or 0 depends entirely on your preference, but it's necessary to explicitly cast both to the target type before passing them as parameters that lack types. See these:

Question 5.9
Question 5.11