FilterBox.java 文件源码

private void fixHandlers(final FilterBox box, Widget w) {
    if (w instanceof HasBlurHandlers)
        ((HasBlurHandlers)w).addBlurHandler(box.iBlurHandler);
    if (w instanceof HasFocusHandlers)
        ((HasFocusHandlers)w).addFocusHandler(box.iFocusHandler);
    if (w instanceof HasKeyDownHandlers)
        ((HasKeyDownHandlers)w).addKeyDownHandler(new KeyDownHandler() {
            @Override
            public void onKeyDown(KeyDownEvent event) {
                if (event.getNativeEvent().getKeyCode() == KeyCodes.KEY_ESCAPE)
                    if (box.isFilterPopupShowing()) box.hideFilterPopup();
            }
        });
}