[英]Prevent invalid user input in SuggestBox?
我有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());
如何防止用户将字符放入没有建议的TextArea
中?
我认为SuggestBox
会检查已放入TextArea
的文本,然后显示建议。 但是,如何防止不再匹配的字符呢?
如果您真的需要
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();
}
}
});
接着
SuggestBox suggestBox = new SuggestBox(myData,area);
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