Re: ComboBox/ComboBoxEntry don't inherit from CellEditable

[Armin Burgmeier <armin arbur net>]

On Thu, 2008-04-24 at 23:27 -0400, Karthik Ganesan wrote:
> Hi,
> Shouldn't ComboBox/ComboBoxEntry inherit from CellEditable : The 
> following program verifies it (dynamic casting to CellEditable returns 
> NULL pointers).

It should, but this would break ABI. GtkComboBox implements
GtkCellEditable since GTK+ 2.6, and we cannot add the new base class
without breaking ABI.

> I was trying to grab the combo box instance used by CellRendererCombo in 
> the editing_started signal and get a NULL pointer. Any workarounds?

You can bind the ComboBox to the signal handler, like

void editing_started(Gtk::CellEditable* editable, const Glib::ustring&
path, Gtk::ComboBox& box) { ... }

crc.signal_editing_started().connect(sigc::bind(sigc::ptr_fun(&editing_started), sigc::ref(cb)));

Armin