Re: Attach invisible data to a TreeRow?

[Marco <mscholtn xs4all nl>]

On Fri, 16 Dec 2005 21:50:39 +0100, Matthias Kaeppler  
<matthias finitestate org> wrote:

> Hello,
>
> I was wondering if it's possible to attach additional, invisible data to  
> a TreeRow in a ListStore. I'm not talking about any actual values which  
> are visible to the user, but some form of meta data which can be used to  
> relate the row to certain other data in an efficient way (e.g. through a  
> pointer).
> I need this kind of funtionality to map filenames in display format to  
> actual filenames on the disk, in order to avoid having two containers of  
> filenames, one holding the actual names, the other the names in  
> displayable format (this would introduce a lot of redundancy).
>
> I thought about deriving from TreeRow and add a new data field, in fact  
> a pointer to the real filename which matches the displayed name in the  
> row, but that doesn't help because ListStore creates the rows for me  
> using append().


Just add a column to your modelcolumns but don't append a column for that  
to your treeview.
Here are some code fragments where i do this in my project.

    //Tree model columns:
    class PageListModelColumns : public Gtk::TreeModel::ColumnRecord
    {
    public:
        PageListModelColumns()
        { add(m_col_name); add(m_col_page); }

        Gtk::TreeModelColumn<Glib::ustring> m_col_name;
        Gtk::TreeModelColumn<DialogPage*> m_col_page;
    };
    PageListModelColumns m_PageListColumns;


    //Add the TreeView's view columns:
    m_pPagelist->append_column("Name", m_PageListColumns.m_col_name);
    //m_pPagelist is a treeview

--
Marco