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scala-swing事件框架-我应该在哪里添加我的反应器?

scala-swing scala events

6

oxbow_lakes · 技术社区 · 16 年前

我正在尝试捕捉鼠标点击,即使在 Table (这将导致弹出窗口显示)。桌子在一个 ScrollPane 它(依次)在 Panel . 我已经为所有的类添加了反应,但我似乎从来没有真正得到一个点击事件被捕获!

class MyPanel extends GridBagPanel {
  val gbc = new GridBagContraints( ... )

  add(new ScrollPane {
    reactions += {
      case MouseClicked(src, point, mod, clicks, pops) =>
        println("Scroll pops: " + pops)
    } 

    viewportView = new Table {
      reactions += {
        case MouseClicked(src, point, mod, clicks, pops) =>
          println("Table pops: " + pops)
      } 

      ...
    }

  }, gbc)

  reactions += {
    case MouseClicked(src, point, mod, clicks, pops) =>
      println("Panel pops: " + pops)
  } 
}

无论我点击哪里,都不会打印任何内容。我做错什么了?

1 回复 | 直到 16 年前

1

5

oxbow_lakes 16 年前

好的-你必须听为了正确的事情:

class MyPanel extends GridBagPanel {
  val gbc = new GridBagContraints( ... )

  val table = new Table { ... }

  add(new ScrollPane {

    viewportView = table
  }

  }, gbc)

  listenTo(table.Mouse.clicks) //THIS LINE IS IMPORTANT :-)

  reactions += {
    case MouseClicked(`table`, point, mod, clicks, pops) =>
      println("Panel pops: " + pops)
    } 
  }
}