Question

I m trying to trap key downs in GWT, and I ve tried both addKeyDownHandler and onBrowserEvent. The problem is that they work as long as the appropriate widget had the focus, but it stops working when something else has the focus. I could add the code to every single widget, but that seems crazy. I also tried forcing one single widget to always have the focus, but that causes other problems with things like TextBoxes (which need the focus for typing).

是否只有一种简单、高层次的方法,才能在金星在关贸总会受到压力时启动某些法典,而不论哪一种植被有重点?

Answer 1

(capture) 阶段在IEE中推广。

Answer 2

Why don t you add the keyDownHandler to the body element like this and add the handler to that? All javascript events will bubble down unless you prevent it in a function().

例:

。

然后将它归入一个类别,使其成为Widget和AddDomHandler,如:。或者,如果这证明不十分简单,那么简单地说,在东道网页上写上 j字,或者使用本地方法(GWT允许你用本地关键词撰写 j。)

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