ComboBox.addOnFormatEntryText

For combo boxes that are created with an entry (See GtkComboBox:has-entry).

A signal which allows you to change how the text displayed in a combo box's entry is displayed.

Connect a signal handler which returns an allocated string representing path. That string will then be used to set the text in the combo box's entry. The default signal handler uses the text from the GtkComboBox::entry-text-column model column.

Here's an example signal handler which fetches data from the model and displays it in the entry.

static gchar*
format_entry_text_callback (GtkComboBox *combo,
const gchar *path,
gpointer     user_data)
{
GtkTreeIter iter;
GtkTreeModel model;
gdouble      value;

model = gtk_combo_box_get_model (combo);

gtk_tree_model_get_iter_from_string (model, &iter, path);
gtk_tree_model_get (model, &iter,
THE_DOUBLE_VALUE_COLUMN, &value,
-1);

return g_strdup_printf ("`g`", value);
}