如何处理退出ScalaFX

import scalafx.application.JFXApp
import scalafx.application.JFXApp.PrimaryStage
import scalafx.scene.Scene
import scalafx.scene.control.Button
import scalafx.Includes._
import scalafx.stage.WindowEvent

object MyApp extends JFXApp {
  // 创建主舞台对象
  stage = new PrimaryStage {
    title = "My ScalaFX App"
    width = 400
    height = 300

    // 设置关闭行为
    onCloseRequest = (we: WindowEvent) => {
      // 执行退出应用程序的操作
      Platform.exit()
    }

    // 创建场景和按钮
    scene = new Scene {
      content = new Button("Exit") {
        onAction = handle {
          // 执行退出应用程序的操作
          Platform.exit()
        }
      }
    }
  }

  // 启动应用程序
  def main(args: Array[String]): Unit = {
    launch(args)
  }
}