RE: Gtk2::TreeModel - foreach

[Jeff Hallock <Jhallock WBandA com>]

> -----Original Message-----
> From: gtk-perl-list-bounces gnome org [mailto:gtk-perl-list-bounces gnome org] On Behalf Of Zettai Muri
> Sent: Thursday, November 19, 2009 3:56 PM
> To: Martin Schlemmer; gtk-perl-list gnome org
> Subject: Re: Gtk2::TreeModel - foreach
>
>
>
> > > Not exactly sure what you want, but attached is an example for a
> > > Gtk2::ListStore's foreach.
>
> Where does the $user_data (scalar) part of the method come into play?
> Is it possible to get an extended example that shows how this is used?
>
> $model->foreach(
>    sub {
>        my($model,$path,$iter) = @_;
>        my($item)              = $model->get($iter, 0);
>
>        print "$item\n";
>
>        # return TRUE to end
>        return FALSE;
>    }, $user_data <----------------------- ???
> );
>
> Is this data within the ListStore or some other data passed to the method?  How does the method act on this 
> data?
>
> Again thanks for the help.


If you supply $user_data - then you it will be passed in as the last argument to the ForEach function.



$model->foreach(
    sub {
        my($model,$path,$iter,$user_data <-------------) = @_;
        my($item)              = $model->get($iter, 0);

        print "$item\n";

        # return TRUE to end
        return FALSE;
    }, $user_data <----------------------- ???
);


Here is an example that searches for a name in model:

sub search {
        my($model,$path,$iter,$search_string) = @_;
      my($item) = $model->get($iter, 0);

        if ($item =~ /$search_string/) {
          print "FOUND\n";
          return TRUE;
      }
      else {
          return FALSE;
      }
}

$model->foreach(\&search, 'Bob');
$model->foreach(\&search, 'Billy');