Re: [gtkmm] TreeView selection question

[Marco <schwein chello nl>]

On Wed, 29 Sep 2004 10:57:45 -0400, Carl Nygard <cjnygard fast net> wrote:

> On Wed, 2004-09-29 at 03:57, Marco Scholten wrote:
> > ----- Original Message -----
> > From: "Carl Nygard" <cjnygard fast net>
> > To: <gtkmm-list gnome org>
> > Sent: Wednesday, September 29, 2004 5:05 AM
> > Subject: [gtkmm] TreeView selection question
> >
> >
> > >
> > > I have a treeview with two columns, first is a simple check button,
> > > second column is a label.
> > >
> > > I'd like to be able to toggle the check buttons in various rows 
> > without
> > > actually selecting the row.
> > >
> > > But of course, I don't know how to accomplish that.  Clues???
> > >
> > > Regards,
> > > Carl
> > >
> > > _______________________________________________
> > > gtkmm-list mailing list
> > > gtkmm-list gnome org
> > > http://mail.gnome.org/mailman/listinfo/gtkmm-list
> > >
> >
> > Maybe this will help, taken form
> > http://www.gtkmm.org/gtkmm2/docs/tutorial/html/ch08s04.html
> >
> > Preventing row selection
> >
> > Maybe the user should not be able to select every item in your list or 
> > tree.
> > For instance, in the gtk-demo, you can select a demo to see the source 
> > code,
> > but it doesn't make any sense to select a demo category.
> >
> > To control which rows can be selected, use the set_select_function() 
> > method,
> > providing a SigC::Slot callback. For instance:
> >
> > m_refTreeSelection->set_select_function( SigC::slot(*this,
> > &DemoWindow::select_function) );
> >
> > and then
> >
> > bool DemoWindow::select_function(const Glib::RefPtr<Gtk::TreeModel>& 
> > model,
> >                                  const Gtk::TreeModel::Path& path, bool)
> > {
> >   const Gtk::TreeModel::iterator iter = model->get_iter(path);
> >   return iter->children().empty(); // only allow leaf nodes to be 
> > selected
> > }
>
> That's fine, but how do I decide to ignore it?  The problem is that I
> only want to ignore the selection if the checkbox was toggled, but I
> don't know that information.  Unless the Path tells me which cell was
> chosen?
>
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtkmm-list

Experiment a little with Gtk::CellRendererToggle::signal_toggled () to 
detect if the checkbox was toggled or 
Gtk::TreeViewColumn::signal_clicked() to detect wich column was clicked, 
set some variable like last_clicked_column, and return 
(last_clicked_column != 0) in DemoWindow::select_function()
I don't know if this will work because i don't know if these signals get 
fired before or after the select function.

Regards,
 Marco