Problems with KeyEvents

Question

I'm wondering why the following code doesn't work:

object Main extends SimpleSwingApplication {

  val dim = new Dimension(500, 110)

  def top = new MainFrame {
    contents = new FlowPanel{
      listenTo(keys, mouse.clicks)
      reactions += {
        case MouseClicked(_,_,_,_,_) => println("Mouse clicked")
        case KeyPressed(_, Key.C, _, _) => println("C pressed")
        case KeyTyped(_, Key.C, _, _) => println("C typed")
        case KeyReleased(_, Key.C, _, _) => println("C released")
      }
    }
    size = dim
  }

}

The mouse clicks will be recognized, but the keystrokes won't. I also tried different keys or modifiers, but nothing seems to have an effect. What am I doing wrong?

(In the unlikely case that this might have something to do with the environment: I'm running this code with SBT on Windows 7)

Just as a side note: it's not so unlikely as you might think: I had problems with swing popup cause on different OS [it behaves differently](http://stackoverflow.com/q/5736872/298389). — om-nom-nom, Dec 03 '12 at 04:30
Maybe because a panel isn't made for keyevents? Does it work for a TextField? — user unknown, Dec 03 '12 at 05:29

score 2 · Accepted Answer · edited May 23 '17 at 12:04

2

Working from this answer, it seems you need to include the line

focusable = true

for your FlowPanel. It should then work.

edited May 23 '17 at 12:04

Community

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answered Dec 03 '12 at 05:40

Luigi Plinge

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Thanks, and sorry for posting this kinda duplicate question. (I guess the problem was that I was searching with [scala-swing]) – SHildebrandt Dec 03 '12 at 05:52
@SHildebrandt I find Google works better than the search on this site! – Luigi Plinge Dec 03 '12 at 08:38

Problems with KeyEvents

1 Answers1