GtkProgress::set_activity_mode
void set_activity_mode(bool
activity_mode);
警告! このメソッドは PHP-GTK 2 では非推奨です。
新しく書くコードでは使用してはいけません。
A GtkProgress can be in one of two different modes: percentage mode
(the default) and activity mode. In activity mode, the progress is
simply indicated as activity rather than as a percentage complete.