struct Gtk::ComboBox::FormatEntryTextSignal


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.

WARNING ⚠️ The following code is in c ⚠️

static char *
format_entry_text_callback (Gtk::ComboBox *combo,
                            const char *path,
                            gpointer     user_data)
  Gtk::TreeIter iter;
  Gtk::TreeModel 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,

  return g_strdup_printf ("%g", value);

Defined in:


Instance Method Summary

Instance methods inherited from struct GObject::Signal

[](detail : String) : self [], name : String name

Constructor methods inherited from struct GObject::Signal

new(source : GObject::Object, detail : String? = nil) new

Instance Method Detail

def connect(*, after : Bool = false, &block : Proc(String, String)) : GObject::SignalConnection #

def connect(handler : Proc(String, String), *, after : Bool = false) : GObject::SignalConnection #

def connect(handler : Proc(Gtk::ComboBox, String, String), *, after : Bool = false) : GObject::SignalConnection #

def emit(path : String) : Nil #

def name : String #
Description copied from struct GObject::Signal

The signal name