clicks.scala

package wakita.lx14

import scala.compat.Platform

import scalafx.Includes._
import scalafx.application.JFXApp
import scalafx.application.JFXApp.PrimaryStage
import scalafx.scene.Scene
import scalafx.scene.input.{MouseEvent}
import scalafx.scene.layout.{Pane}

object Clicks extends JFXApp {

  val canvas = new Pane { }

  val DOUBLE_CLICK_WAIT_MS = 300; // milliseconds

  var clickedAt = Long.MinValue
  canvas.onMousePressed = { (ev: MouseEvent) =>
    clickedAt = Platform.currentTime
    new Thread {
      override def run {
        val clicked = clickedAt
        Thread.sleep(DOUBLE_CLICK_WAIT_MS)
        if (clicked >= clickedAt) println(f"#Clicks = ${ev.clickCount}")
        else println(f"Click(${ev.clickCount}) is ignored")
      }
    }.start
  }

  stage = new PrimaryStage {
    title = "Click Test"
    scene = new Scene(600, 400) {
      root = canvas
    }
  }
}

This scalafx sample code presents how to detect multiple mouse-clicks.