AS3 在班级之间调度自定义事件

Question

我想从 Country() 调度一个自定义事件到 MenuButton();

国家/地区事件

package  {
import flash.events.Event;

public class CountryEvent extends Event {

    public static const COUNTRY_HOVERED:String = "onCountryOver";

    private var _countryName:String = "";

    public function CountryEvent(type:String, countryName:String, bubbles:Boolean=true, cancelable:Boolean=false) {
        super(type, bubbles, cancelable);
        _countryName = countryName;
    }

    public function get countryName():String {
        return _countryName;
    }

    public override function clone():Event
    {
        return new CountryEvent(type,countryName,bubbles,cancelable);
    }
}

} 国家/地区类

package 
{

    import flash.display.MovieClip;
    import flash.events.MouseEvent;
    import flash.events.Event;

    public class Country extends MovieClip
    {
        private var countryEvent:CountryEvent;


        public function Country()
        {
            this.addEventListener(MouseEvent.MOUSE_OVER,onMouseOver);
            this.addEventListener(MouseEvent.MOUSE_OUT,onMouseOut);
        }

        private function onMouseOver(e:MouseEvent):void
        {

                countryEvent = new CountryEvent("onCountryOver",this.name);

                dispatchEvent(countryEvent);

            }
        }

        private function onMouseOut(e:MouseEvent):void
        {

        }
    }

}

菜单按钮类

package  {

    import flash.display.MovieClip;
    import flash.events.MouseEvent;
    import CountryEvent;


    public class MenuButton extends MovieClip {

        public var countryName:String = "";

        public function MenuButton() {

            this.buttonMode = true;
            this.addEventListener(MouseEvent.MOUSE_OVER,onMouseOver);
            this.addEventListener(MouseEvent.MOUSE_OUT,onMouseOut);
            this.addEventListener(CountryEvent.COUNTRY_HOVERED,onCountryOver);
        }

        private function onCountryOver(e:CountryEvent):void {
            if(e.countryName == countryName) {
                this.gotoAndPlay(2);
            }
        }

        private function onMouseOver(e:MouseEvent):void {
            this.gotoAndPlay(2);

        }

        private function onMouseOut(e:MouseEvent):void {
            this.gotoAndPlay(11);
        }
    }

}

当悬停在一个国家/地区时，会调度一个自定义事件，我希望菜单按钮侦听该事件，并且如果传递的参数与其名称相同，则突出显示。 Country 类是我在舞台上的国家电影剪辑的基类，MenuButton 是菜单按钮的基类

似乎该事件永远不会完成

提前感谢

Answer 1

您必须进行两项修改：

首先，将事件 bubbles 属性设置为 true，这样当 Country 剪辑调度事件时，它就会上升到顶层。

那么你的MenuButtons应该监听stage，而不是它们自己。因此，当 Country 调度一个事件时，它会进入 stage 并可以被按钮捕获。如果你想听舞台，你必须对你的代码做一些轻微的改变：

public function MenuButton() {

    this.buttonMode = true;
    this.addEventListener(MouseEvent.MOUSE_OVER,onMouseOver);
    this.addEventListener(MouseEvent.MOUSE_OUT, onMouseOut);
    this.addEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
}

private function onAddedToStage(e:Event):void 
{
    removeEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
    stage.addEventListener(CountryEvent.COUNTRY_HOVERED,onCountryOver); 
}

Answer 2

解决此问题的最佳且简单的方法是简单地将阶段引用作为类级别参数传递，并将事件添加到阶段引用并将事件分派到阶段引用。

国家/地区类

package{

import flash.display.MovieClip;
import flash.events.MouseEvent;
import flash.events.Event;

public class Country extends MovieClip
{
    private var countryEvent:CountryEvent;
    private var _stageRef:Stage;


    public function Country(pStageRef:Stage)
    {
        _stageRef = pStageRef;

        this.addEventListener(MouseEvent.MOUSE_OVER,onMouseOver);
        this.addEventListener(MouseEvent.MOUSE_OUT,onMouseOut);
    }

    private function onMouseOver(e:MouseEvent):void
    {

            countryEvent = new CountryEvent("onCountryOver",this.name);

            _stageRef.dispatchEvent(countryEvent);

        }
    }

    private function onMouseOut(e:MouseEvent):void
    {

    }
}

菜单按钮类

package  {

import flash.display.MovieClip;
import flash.events.MouseEvent;
import CountryEvent;


public class MenuButton extends MovieClip {

    public var countryName:String = "";
    private var _stageRef:Stage;

    public function MenuButton(pStageRef:Stage) {
        _stageRef = pStageRef;
        this.buttonMode = true;
        this.addEventListener(MouseEvent.MOUSE_OVER,onMouseOver);
        this.addEventListener(MouseEvent.MOUSE_OUT,onMouseOut);
        _stageRef.addEventListener(CountryEvent.COUNTRY_HOVERED,onCountryOver);
    }

    private function onCountryOver(e:CountryEvent):void {
        if(e.countryName == countryName) {
            this.gotoAndPlay(2);
        }
    }

    private function onMouseOver(e:MouseEvent):void {
        this.gotoAndPlay(2);

    }

    private function onMouseOut(e:MouseEvent):void {
        this.gotoAndPlay(11);
    }
}