[Glade-users] Adding entries to a gtkcomboboxentry

[tristan.van.berkom at gmail.com (Tristan Van Berkom)]

Leo - wrote:

> I hope I do this right, first time mailing list user :)
>
> I'm designing an app with glade and is going to use a gtkcomboboxentry as a
> command input+command history part = The user edits the command in the
> "entry" part and when he/she presses enter the command gets executed and
> gets prepended in the history (popup menu part of the comboboxentry)
>
> How would I go on about prepending the neew command as a new row in the
> menu?
> I searched the gtk reference manual and found the function
> "gtk_combo_box_append_text"
> But when running the program with that command I get the errors
>
> (<unknown>:21581): Gtk-CRITICAL **: gtk_combo_box_append_text: assertion
> `GTK_IS_LIST_STORE (combo_box->priv->model)' failed
>
> There is a note attached to the gtk reference saying
>
> "Note that you can only use this function with combo boxes constructed with
> gtk_combo_box_new_text()."
>
> Could that be the problem?, that glade doesn't create the widget with that
> function?
> If I choose export and look in the c source there is the following part in
> the interface.c file:
>
>  combo_result = gtk_combo_box_new_text ();
>
> So that shouldn't be the case should it?
>
> However, I am using glade through the glade-xml library and using the xml
> file and not the c source, could it be
> that the library generates/inits widgets differently?
>
> My crack at it:
> The widget data seems to be stored in a gtktreemodel, a widget I know
> nothing
> about, but which seems to have some append/prepend functions, only that
> they Invoke a third widget adding to the confusion.
>
> I would need help on understanding how to accomplish the above.
>
> Another person had a similar question:
> http://lists.ximian.com/pipermail/glade-users/2004-October/002215.html
> and got this answer:
>
> Look at the code for gtk_combo_box_new_text(). You just have to set upthe
> combo in a similar way and append_text() will work fine.
> That would be in the gtk source wouldn't it? If so how would I obtain it,
> find the special part, etc?
>  
Heh,
   you've definitly stumbled upon one or glade/libglade's wierder
glitches ;-)

glade-2 will allow you to set an "items" property (that I assume you
dont need to set since your items are completely dynamic).

libglade will create the GtkListStore and add the GtkCellRendererText
*if* there were any items in the glade file.

So the confusing bottom line is that, libglade will setup you combo-box
for regular gtk_combo_box_new_text() type interaction *if* there were any
items set in the glade file, otherwise you just get a naked combo-box and
you'll have to set it up yourself.

Cheers,
                                          -Tristan