default_button

Description:

public int default_button { get; set; }

This property determines what happens when the Return key is pressed while the alert is shown.

If this property holds the index of a button in [property@Gtk.AlertDialog:buttons], then pressing Return is treated as if that button was pressed. If it is -1 or not a valid index for the `buttons` array, then nothing happens.

If `buttons` is `NULL`, then the automatically created 'Close' button is treated as both cancel and default button, so 0 is returned.