L'élément choisi

• Programming with gtkmm 3
• Boîtes combinées

To discover what item, if any, the user has chosen from the ComboBox, call ComboBox::get_active(). This returns a TreeModel::iterator that you can dereference to a Row in order to read the values in your columns. For instance, you might read an integer ID value from the model, even though you have chosen only to show the human-readable description in the ComboBox. For instance:

Gtk::TreeModel::iterator iter = m_Combo.get_active();
if(iter)
{
  Gtk::TreeModel::Row row = *iter;

  // Obtenir les données de la ligne choisie grâce à notre 
  // connaissance du modèle d'arborescence :
  int id = row[m_Columns.m_col_id];
  set_something_id_chosen(id); // Votre fonction.
}
else
  set_nothing_chosen(); // Votre fonction.