Re: [gtkmm] Problem with Gdk::Pixbuf in Gtk::TreeView

[Martin Schulze <martin-ml hippogriff de>]

Am 2003.09.04 17:00 schrieb(en) Simon Fuhrmann:
> Hi!
>
> On Wed, Sep 03, 2003 at 09:51:53PM +0200, Martin Schulze wrote:
> >>  /* FIXME: This relation causes errors */
> >>  this->tree_view.append_column ("Icon", this->column_set.icon);
> >>  /* This works. */
> >>  this->tree_view.append_column ("Filename",
> >>  this->column_set.filename);
> >>  this->tree_view.append_column ("Size", this->column_set.size);
> >>  this->tree_view.append_column ("UID", this->column_set.uid);
> >>  this->tree_view.append_column ("GID", this->column_set.gid);
> >>  this->tree_view.append_column ("Blocks", this->column_set.
> blocks);
> >>  this->tree_view.append_column ("Hlink", this->column_set.hlink);
> >>}
>
> >> I figured out that the problem has something to do with the
> relation
> >> of
> >> the Gtk::TreeView::Column and the Gtk::ModelViewColumn. Because the
> >> error messages appear even if I omit filling a
> >> Glib::RefPtr<Gdk::Pixbuf>
> >> into the store. If I create the Gtk::TreeView::Column manually with
> a
> >> Gtk::CellRendererPixbuf without that relation, I don't get this
> error
> >> message (but no pixbufs aswell, of corse).
>
> > Try to append the manually created column and see if it works then.
>
> I have tried, but like I said, the problem appears only if I establish
> the connection between the Gtk::TreeView::Column and the
> Gtk::ModelView::Column. For example this code does not generate
> errors:
>
>   Gtk::CellRendererPixbuf *imagerenderer =
>       Gtk::manage(new Gtk::CellRendererPixbuf);
>   Gtk::TreeViewColumn* iconcolumn =
>       Gtk::manage(new Gtk::TreeViewColumn("Icon", *imagerenderer));
>   this->tree_view.append_column (*iconcolumn);

Sorry, I haven't been very clear.
I meant you should try exactly this but insert the line

iconcolumn->set_renderer(*imagerenderer, this->columns_set.icon);

before appending the column to the treeview (I don't know if the
order matters). This is the way you would set up a column if you
needed to specify the cellrenderer type explicitly (like e.g. the
custom cellrenderer type CellRendererList in the examples).

> But I have no relation and no Pixbufs. This code does not work and
> produces the same errors I was talking about:

If the code above produces the same errors then the bug is somewhere
else. I think it would be best if you would file a bug at bugzilla
(http://www.bugzilla.org) and attach a small-as-possible test case
to coordinate further investigations.

Regards,

  Martin