Re: Inserting paramenter into a ROW/NODE in a TreeView

[Ross McFarland <rwmcfa1 neces com>]

On Fri, 2005-01-14 at 08:21, Raul Dias wrote:
> > > So, how do I keep private data with each row/node?
> >
> > Add another column to your model, but don't display it in the view.
> >
> >    use constant THING_1_COLUMN => 0;
> >    use constant THING_2_COLUMN => 1;
> >    use constant PRIVATE_1_COLUMN => 2;
> >    use constant PRIVATE_2_COLUMN => 3;
> >
> >    # create and fill the model with four columns of data
> >    my $model = Gtk2::ListStore->new ('Glib::String', # THING_1_COLUMN
> >                                      'Glib::Int', # THING_2_COLUMN
> >                                      'Glib::Int', # PRIVATE_1_COLUMN
> >                                      'Glib::Scalar); # PRIVATE_2_COLUMN
> >
> >    # only show two of those columns, and in reverse order, at that.
> >    my $view = Gtk2::TreeView->new ($model);
> >    $view->insert_column_with_attributes
> >                            (0, "Thing 2", Gtk2::CellRendererText->new,
> >                             text => THING_2_COLUMN);
> >    $view->insert_column_with_attributes
> >                            (1, "Thing 1", Gtk2::CellRendererText->new,
> >                             text => THING_1_COLUMN);
>
> Great!
>
> I thought I would have to call insert_column_with_attributes to every
> column and them call $renderer->set(visible => 0); to make it invisible.
>
> The problem was that the header was still visible.

you don't create a renderer for those columns in the first place. they
are then in the store, but not the view. the view knows nothing about
their existence. this is a side benefit of the MVC arch. you can make
arbitrary views of stores picking and choosing what and how you want to
show it, if at all.

-- 
-rm
http://www.neces.com/