ComboBox.addOnFormatEntryText

Emitted to allow changing how the text in a combo box's entry is displayed.

See [property@Gtk.ComboBox:has-entry].

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 [property@Gtk.ComboBox:entry-text-column] model column.

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

static char *
format_entry_text_callback (GtkComboBox *combo,
const char *path,
gpointer     user_data)
{
GtkTreeIter iter;
GtkTreeModel model;
double       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);
}