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 action is
Available since: 2.4
The action that the file selector is performing.