Adds a 'choice' to the file chooser. This is typically implemented
as a combobox or, for boolean choices, as a checkbutton. You can select
a value using gtk_file_chooser_set_choice() before the dialog is shown,
and you can obtain the user-selected value in the ::response signal handler
using gtk_file_chooser_get_choice().
Adds a 'choice' to the file chooser. This is typically implemented as a combobox or, for boolean choices, as a checkbutton. You can select a value using gtk_file_chooser_set_choice() before the dialog is shown, and you can obtain the user-selected value in the ::response signal handler using gtk_file_chooser_get_choice().
Compare gtk_file_chooser_set_extra_widget().