Re: Changing TreeView Cell Renderers

[Murray Cumming <murrayc murrayc com>]

On Fri, 2005-03-18 at 15:53 -0600, Bob Caryl wrote:
> Hello all,
> 
> I'm trying to use a treeview and I would like to have a boolean field in 
> the data to be rendered as a checkbox and be editable.
> 
> The code I'm using looks like this:
> 
>     class ModelColumns : public Gtk::TreeModel::ColumnRecord       
>     {                                                               
>     public:
>         ModelColumns()
>         {     add(m_disp);
>             add(m_check);
>             add(m_tag);
>             add(m_desg);
>             add(m_exec);
>         }
>         Gtk::TreeModelColumn<Glib::ustring> m_disp;                    
> // column for menu display text
>         Gtk::TreeModelColumn<gboolean> m_check; 

C++ has bool. gboolean is actually an int, used in C because it does not
have bool.

Just use append_column() with a bool column and you will get a checkbox
by default.
               
> // column for check button
>         Gtk::TreeModelColumn<Glib::ustring> m_tag;                    // 
> column for menu xml tag
>         Gtk::TreeModelColumn<Glib::ustring> m_desg;                    
> // column for menu designator text
>         Gtk::TreeModelColumn<Glib::ustring> m_exec;                    
> // column for menu action text.
>     };
> 
>     ModelColumns m_columns;                                            
> // columns for Gtk::ListStore object
>     Glib::RefPtr<Gtk::TreeStore> list;                                // 
> our listore object for the treeview
> 
> 
>     list = Gtk::TreeStore::create(m_columns);
>     tree->append_column_editable(" SEL ", m_columns.m_check);   
>     tree->append_column(" Name ", m_columns.m_disp);   
> 
>     Gtk::CellRendererToggle *toggle = new Gtk::CellRendererToggle;
>     Gtk::TreeView::Column *pColumn = tree->get_column(0);
>     pColumn->clear();
>     pColumn->pack_start(*toggle);
> 
> 
> The foregoing code does indeed place a checkbox type renderer in the 
> column cell, but it does not appropriately display the data, nor is it 
> editable.  Oh yeah, that code does not appear inline like that in the 
> app.. just wanted to show all the declarations and definitions.
> 
> Any ideas on what I'm omitting or doing wrong here?
> 
> Thanks,
> Bob Caryl

-- 
Murray Cumming
murrayc murrayc com
www.murrayc.com
www.openismus.com