是否阻止SuggestBox中的无效用户输入？

Question

我让SuggestBox接受用户输入，并使用GWT在弹出窗口中显示suggestions。

SuggestBox suggestBox = new SuggestBox(myData, new TextArea());

如何防止用户在TextArea中输入没有建议的字符？

我认为SuggestBox会检查输入到TextArea中的文本，然后显示建议。但是我怎样才能阻止不匹配的字符呢？

Answer 1

如果你真的需要它

   TextArea area = new TextArea();
             area.addKeyDownHandler(new KeyDownHandler() {

                @Override
                public void onKeyDown(KeyDownEvent event) {
                    if(event.getNativeKeyCode()==13 ||....){//Add remaining key codes which you dont want.For example i added enter key which keycode is 13.Remove that and add your key codes there. 
                        event.preventDefault();
                 }  
                }
            });

然后

SuggestBox suggestBox = new SuggestBox(myData,area);