Scala深入浅出进阶经典 第72讲：Scala界面事件处理编程实战详解

package com.dt.scalaInAction.demo_072import scala.swing._import scala.swing.event.ButtonClicked/** * Scala界面事件处理编程实战详解 */object CUI_Panel_Layout extends SimpleSwingApplication {     def top = new MainFrame {        title = "Second GUI"        val button = new Button {           text = "Scala"        }        var label = new Label {           text = "Here is Spark!!!"        }        //定义容器内部组件        contents = new BoxPanel(Orientation.Vertical){            contents += button            contents += label            border = Swing.EmptyBorder(50, 50, 50, 50)        }                /**         * Source:         *  trait Reactor {              val reactions: Reactions = new Reactions.Impl              def listenTo(ps: Publisher*) = for (p <- ps) p.subscribe(reactions)              def deafTo(ps: Publisher*) = for (p <- ps) p.unsubscribe(reactions)            }         */        //事件监听        listenTo(button)        var clicks = 0        //reactions方法是用于对事件进行处理 +=函数添加对应的事件处理 -=函数除去对应的事件处理        /**         * source:         * abstract class Reactions extends Reactions.Reaction {              def += (r: Reactions.Reaction): this.type              def -= (r: Reactions.Reaction): this.type          }         */        reactions += {            //通过模式匹配出合适的事件源 可以匹配多种事件源            case ButtonClicked(button) => {                clicks += 1                label.text = "Clicked" + clicks + " times"            }         }            }}

以上内容是从王家林老师DT大数据课程第72讲的学习笔记和个人整理。
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