Re: Problem with a TreeView - speed

[Murray Cumming <murrayc murrayc com>]

On Mon, 2009-03-16 at 17:19 +0100, Dimitri Holz wrote:
> Murray Cumming schrieb:
> > On Mon, 2009-03-16 at 15:00 +0100, Dimitri Holz wrote:
> >   
> >> ____I'm programming C++ and Gtkmm since less than one year and I'm a
> >> student without programming-experiences. Because of that I don't
> >> perfectly ____understand what you mean with using of cell_data_func to
> >> show the visible parts of the row.
> >>     
> >
> > Sorry. I meant to post a link. Actually, we don't seem to mention this
> > in the book. But it is used in an unrelated example. Search for
> > "ExampleWindow::treeviewcolumn_validated_on_cell_data" here:
> > http://www.gtkmm.org/docs/gtkmm-2.4/docs/tutorial/html/ch08s08.html
> >
> > This is the API reference:
> > http://www.gtkmm.org/docs/gtkmm-2.4/docs/reference/html/classGtk_1_1TreeViewColumn.html#765296845c9e9757ba405becbbc13d96
> >
> > Your callback function will set whatever cellrenderer properties (in the
> > view) that you want to set, and will only be called for visible rows.
> >   
> 
> I really not understand where in your link a solution for "not showing
> the visible parts of the row" is !?

You _do_ want to show the _visible_ parts. You don't want to waste
processor time or memory on the non visible parts.
 
>  Can you describe it, please?

I have tried to explain. I think you should try to use
set_cell_data_func() in an example and see when it is called.

-- 
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