Re: [gtkmm] Gtk::Combo get_list()->children().clear() howto?

[Jeff Gavin <jeff ezclick net>]

Jeff Gavin wrote:
> Murray Cumming Comneon com wrote:
>
> > http://bugzilla.gnome.org/show_bug.cgi?id=110206
>
> Thanks,
>
> It's a bug.  Thanks for the URL.
>
> > By the way, for gtkmm 2.2 these are the workarounds that I can think of:
> > 1. Remove all the items and add them again. (Removing might need 2.)
> > 2. Use GTK+ functions, after using gobj() to get the C instance.
>
>
> O.K. Cool.  I think this might put me back on track.  I can grab the C 
> instance hidden in the Gtk::Combo, use the GTK+ functions to manipulate 
> my combo box and then I might be home on time for supper!

FYI,

For the future archive readers I used the following work around:

   gtk_list_clear_items(mycombo->get_list()->gobj(), 0, -1);

to clear the items from the combo box.

Regards,

Jeff

P.S. for supper I had 3 eggs, 3 pieces of bacon, toast, a beer and two 
glasses of sunny-D.  Mmmm.

> Regards,
>
> Jeffrey S. Gavin
>
> > Murray Cumming
> > murrayc usa net
> > www.murrayc.com
> >
> > > -----Original Message-----
> > > From: Jeff Gavin [mailto:jeff ezclick net] Sent: Dienstag, 3. Juni 
> > > 2003 03:15
> > > To: gtkmm-list gnome org
> > > Subject: [gtkmm] Gtk::Combo get_list()->children().clear() howto?
> > >
> > >
> > > I am using a combo box as a search entry.  As the user types into the 
> > > combo box, a database lookup happens, and the top match is displayed 
> > > in the entry.   If the user clicks on the drop-down button, a list of 
> > > matching entries is displayed.  Just like your mozilla browser does 
> > > when you type on the address line.
> > >
> > > I can populate the combo box on the first search, but CANNOT figure 
> > > out how to delete and repopulate the combo box on subsequent searches.
> > >
> > > I have tried:
> > >
> > >     combo->get_list()->children().clear();
> > >
> > > but this crashes.  It's not clear to me that this is a bug, or I 
> > > don't know how to program it correctly.  The debugger says:
> > >
> > > Program received signal SIGSEGV, Segmentation fault.
> > > [Switching to Thread 1086466976 (LWP 15014)]
> > > 0x4012322f in 
> > > Gtk::ComboDropDown_Helpers::ComboDropDownList::erase(Glib::Lis
> > > t_Iterator<Gtk::ComboDropDownItem>) (this=0x827f2b8, 
> > > position={<List_Iterator_Base<Gtk::ComboDropDownItem>> = {<No data 
> > > fields>}, head_ = 0x829c804, node_ = 0x82a4e9c}) at combo.h:105 in 
> > > combo.h
> > >
> > > How do you manage (delete and add) the items in a dynamic combo box 
> > > like this?  Is it possible?  Certainly someone out there does this.
> > >
> > > I have read the list archives and discovered that MANY people have 
> > > had this problem in the past, but I cannot find any message that 
> > > posts a solution, workaround or an example.  All of the examples that 
> > > I can find for Gtk::Combo are static combo boxes.
> > >
> > > It would be nice if one could simply myCombo->clear(); and get a 
> > > fresh empty combo box to repopulate, but I cannot make this happen. 
> > > Any help would be great!
> > >
> > > If and when I get this working, I will update the combo example to 
> > > show future gtkmm programmers how to do this.
> > >
> > > Thanks,
> > >
> > > Jeffrey S. Gavin
> > >
> > > _______________________________________________
> > > gtkmm-list mailing list
> > > gtkmm-list gnome org
> > > http://mail.gnome.org/mailman/listinfo/gtkmm-list
>
>
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