void gtk_file_chooser_set_action ( GtkFileChooser* chooser, GtkFileChooserAction action )
Sets the type of operation that the chooser is performing.
The user interface is adapted to suit the selected action.
For example, an option to create a new folder might be shown
if the action is
GTK_FILE_CHOOSER_ACTION_SAVE but not if the
the action that the file selector is performing