Create a new folder mode

The file chooser will let the user name an existing or new folder.

Property definitions

gtk $ GtkFileChooserAction :: create_folder
	# Create a new folder mode
	#
	# The file chooser will let the user name an existing or new folder.
	new create_folder `{ return GTK_FILE_CHOOSER_ACTION_CREATE_FOLDER; `}
lib/gtk/v3_4/gtk_dialogs.nit:200,2--203,70