struct Gtk::ComboBox::FormatEntryTextSignal

• Gtk::ComboBox::FormatEntryTextSignal
• GObject::Signal
• Struct
• Value
• Object

Overview

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,
                      -1);

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

Defined in:

Instance Method Summary

• #connect(*, after : Bool = false, &block : Proc(String, String)) : GObject::SignalConnection
• #connect(handler : Proc(String, String), *, after : Bool = false) : GObject::SignalConnection
• #connect(handler : Proc(Gtk::ComboBox, String, String), *, after : Bool = false) : GObject::SignalConnection
• #emit(path : String) : Nil
• #name : String

  The signal name

Instance Method Detail