Re: GtkListStore wit multiple selection.

[Harring Figueiredo <harringf yahoo com>]

 Martyn,

 Thanks for the reply.

 Yes, I am using a GtkTreeModel.

 The fuction to listen for the "changed" signal is:

static void
selection_changed (GtkTreeSelection *selection)
{
    ...
    if (gtk_tree_selection_get_selected (selection, &model, &iter))
    {
     ... This fails because of the code assertion (see [1] below)
    }
...
}

  In this case, I cannot use the "changed" signal to listen for
selected/unselected on a GtkSelectionMode MULTIPLE.

  The only other way is to interate through all the nodes/rows and see if they
are selected -- quite expensive.)





[1]
From: gtktreeselection.c

line 360   g_return_val_if_fail (selection->type != GTK_SELECTION_MULTIPLE,
FALSE);






--- Martyn Russell <ginxd btopenworld com> wrote:
> On Wed, 2002-10-09 at 19:21, Harring Figueiredo wrote:
> >  Hello all,
> >
> >
> >  I have a liststore with MULTIPLE selection. Is there a way to find out if
> the
> > rows are selected ?
> >
> >  Here is what I am trying to do:
> >
> >   If any rows are selected , activate Del Button.
> >   else, inactivate Del button.
> >
> >  The problem is that the "changed" signal is only a hint to the selection.
> If
> > the row is selected and the user unselects it, the signal is also emitted.
> (The
> > documentation describes this.). Keep in mind that my selection mode is
> > MULTIPLE.
>
> I know this sounds strange, but have you looked at GtkTreeSelection??
> http://developer.gnome.org/doc/API/2.0/gtk/gtktreeselection.html
>
> It may work, after all, Im sure you have to use GtkTreeModel for a
> GtkListStore.
>
> >   Thanks in advance for any help.
> >
> > Harring.
> >
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>
> Regards,
>
> Martyn


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