Re: Remove Multiple Rows from Gtk2::ListStore

[Torsten Schoenfeld <kaffeetisch gmx de>]

On 16.12.2009 20:24, Zettai Muri wrote:
> So then I tried:
>
>          my @paths = $selection->get_selected_rows;
>          foreach my $p (@paths)
>          {
>              my $iter = $model->get_iter($p);
>              $model->remove($iter);
>          }
>
> But when I select multiple rows and try to remove them it gives this error:
> *** unhandled exception in callback:
> ***   variable not allowed to be undef where GtkTreeIter is wanted at line 654.

That likely happens because by removing rows you made one of the later 
paths refer to non-existant rows so that $model->get_iter($path) returns 
undef.  One quick hack that might make this work is to iterate over the 
@paths in reverse order.  But to be safe you should follow the doc's 
advice[1] of converting the paths to Gtk2::TreeRowReferences (which 
listen to changes in the model and adapt accordingly).

[1] 
<http://library.gnome.org/devel/gtk/stable/GtkTreeSelection.html#gtk-tree-selection-get-selected-rows>