如何识别Scala中的鼠标点击？

Question

我正在写一个小的GUI程序.一切正常,除了我想要识别鼠标双击.但是,我根本无法识别鼠标点击(如此),但我可以单击按钮并从列表中选择代码.

以下代码改编自Ingo Maier的"The scala.swing package":

import scala.swing._
import scala.swing.event._

object MouseTest extends SimpleGUIApplication {
  def top = new MainFrame {
    listenTo(this.mouse) // value mouse is not a member of scala.swing.MainFrame
    reactions += {
      case e: MouseClicked =>
        println("Mouse clicked at " + e.point)
    }
  }
}

我尝试了多种变体:鼠标与鼠标,SimpleSwingApplication,从java.awt.event等导入MouseEvent.错误信息足够清晰 - MainFrame中没有值鼠标 - 所以,它在哪里呢？救命!

Answer 1

也许那样？

object App extends SimpleSwingApplication {
  lazy val ui = new Panel {
    listenTo(mouse.clicks)
    reactions += {
      case e: MouseClicked =>
        println("Mouse clicked at " + e.point)
    }
  }
  def top = new MainFrame {
    contents = ui
  }
}

BTW,SimpleGUIApplication已被弃用