docs/examples/swing/CountButton.scala


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package examples.swing

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

object CountButton extends SimpleSwingApplication {
  def top = new MainFrame {
    title = "My Frame"
    contents = new GridPanel(2, 2) {
      hGap = 3
      vGap = 3
      val button = new Button {
        text = "Press Me!"
      }
      contents += button
      val label = new Label {
        text = "No button clicks registered"
      }
      contents += label

      listenTo(button)
      var nclicks = 0
      reactions += {
        case ButtonClicked(b) =>
          nclicks += 1
          label.text = "Number of button clicks: "+nclicks
      }
    }
  }
}