WindowClosingEventSubject.java 文件源码

@Override
protected WindowListener onSubscribe(final Observer<? super WindowEvent> observer) {
    LOG.trace("onSubscribe(): {}", observer);

    checkNotNull(observer, "observer");

    final WindowListener listener = new WindowAdapter() {
        @Override
        public void windowClosing(WindowEvent e) {
            LOG.trace("windowClosing(): {}", e);
            onNext(e);
        }
    };

    window.addWindowListener(listener);

    return listener;
}