haskell - How do I get the arrow keys to change the focus to the next element in a threepenny-gui grid?

Question

The tab key changes the focus in a grid to the next element. How do I get the up/down/left/right arrow keys to work also?

Answer 1

很简单，您首先确定箭头键值并编写代码 onKeyPress 并检查键的值并编写适当的代码并让我知道发生了什么。