FileInputButton.java 文件源码

public FileInputButton() {
    wrapper = new Span();
    wrapper.addStyleName(Styles.BTN);
    upload = new FileUpload();

    upload.addChangeHandler(new ChangeHandler() {
        @Override
        public void onChange(ChangeEvent event) {
            fireChanged();
        }
    });

    wrapper.add(upload);
    wrapper.addStyleName("btn-file");
    initWidget(wrapper);
}