简化 Flex/AS3 代码

发布于 2024-08-08 09:06:43 字数 6443 浏览 4 评论 0原文

我用 php 编程了一段时间,但它都是面向过程的。现在我在 Flex 3 中有一个项目,我制作了一个简单的脚本,它可以动画(移动)几个对象,但我认为我在这里错过了面向对象编程的要点,因为我一遍又一遍地重复一些东西......也许它与我对 AS3 仍然存在的所有困惑混合在一起,所以请告诉我是否有任何“更聪明”的方式来编写这段代码:

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"
    width="100%" height="100%"
    paddingBottom="0" paddingLeft="0" paddingRight="0" paddingTop="0"
    horizontalScrollPolicy="off" verticalScrollPolicy="off"
    creationComplete="init()">

    <mx:Script>
        <![CDATA[
            import mx.events.EffectEvent;

            public var opened1:Boolean;
            public var opened2:Boolean;
            public var opened3:Boolean;
            public var opened4:Boolean;

            [Bindable] public var pgW:Number;

            private function init():void{
                pgW = this.width;

                opened1 = false;
                opened2 = false;
                opened3 = false;
                opened4 = false;

                addListeners();
            }

            private function mouseOver1(event:MouseEvent):void{
                removeListeners();

                if (opened2){
                    moveOut.target = txt2;
                }
                if (opened3){
                    moveOut.target = txt3;
                }
                if (opened4){
                    moveOut.target = txt4;
                }

                moveOut.play();
                setOpened(1);
                moveIn.target = txt1;
                moveIn.play();
            }

            private function mouseOver2(event:MouseEvent):void{
                removeListeners();

                if (opened1){
                    moveOut.target = txt1;
                }
                if (opened3){
                    moveOut.target = txt3;
                }
                if (opened4){
                    moveOut.target = txt4;
                }

                moveOut.play();
                setOpened(2);
                moveIn.target = txt2;
                moveIn.play();
            }

            private function mouseOver3(event:MouseEvent):void{
                removeListeners();

                if (opened1){
                    moveOut.target = txt1;
                }
                if (opened2){
                    moveOut.target = txt2;
                }
                if (opened4){
                    moveOut.target = txt4;
                }

                moveOut.play();
                setOpened(3);
                moveIn.target = txt3;
                moveIn.play();
            }

            private function mouseOver4(event:MouseEvent):void{
                removeListeners();

                if (opened1){
                    moveOut.target = txt1;
                }
                if (opened2){
                    moveOut.target = txt2;
                }
                if (opened3){
                    moveOut.target = txt3;
                }

                moveOut.play();
                setOpened(4);
                moveIn.target = txt4;
                moveIn.play();
            }




            private function addListeners():void{
                btn1.addEventListener(MouseEvent.MOUSE_DOWN, mouseOver1);
                btn2.addEventListener(MouseEvent.MOUSE_DOWN, mouseOver2);
                btn3.addEventListener(MouseEvent.MOUSE_DOWN, mouseOver3);
                btn4.addEventListener(MouseEvent.MOUSE_DOWN, mouseOver4);
            }

            private function removeListeners():void{
                btn1.removeEventListener(MouseEvent.MOUSE_DOWN, mouseOver1);
                btn2.removeEventListener(MouseEvent.MOUSE_DOWN, mouseOver2);
                btn3.removeEventListener(MouseEvent.MOUSE_DOWN, mouseOver3);
                btn4.removeEventListener(MouseEvent.MOUSE_DOWN, mouseOver4);
            }

            private function setOpened(nr:int):void{
                if (nr == 1){
                    opened1 = true;
                    opened2 = false;
                    opened3 = false;
                    opened4 = false;
                }
                if (nr == 2){
                    opened1 = false;
                    opened2 = true;
                    opened3 = false;
                    opened4 = false;
                }
                if (nr == 3){
                    opened1 = false;
                    opened2 = false;
                    opened3 = true;
                    opened4 = false;
                }
                if (nr == 4){
                    opened1 = false;
                    opened2 = false;
                    opened3 = false;
                    opened4 = true;
                }
                trace("opened" + nr);
            }

            private function setPositions(event:EffectEvent):void{
                event.effectInstance.target.x = -(pgW);
            }

            private function klik(event:MouseEvent):void {
                event.stopPropagation();
            }
        ]]>
    </mx:Script>

    <mx:Move id="moveIn"
        xFrom="{-pgW}" xTo="0"
        yFrom="0" yTo="0"
        duration="1000"
        effectEnd="addListeners();"/>

    <mx:Move id="moveOut"
        xFrom="0" xTo="0"
        yFrom="0" yTo="250"
        duration="1000"/>


    <mx:Image id="btn1" source="assets/img/32/32-btn1.swf"
            x="0" y="0"
            width="100%"
            click="klik(event)"/>

    <mx:Image id="btn2" source="assets/img/32/32-btn2.swf"
            x="0" y="0"
            width="100%"
            click="klik(event)"/>

    <mx:Image id="btn3" source="assets/img/32/32-btn3.swf"
            x="0" y="0"
            width="100%"
            click="klik(event)"/>

    <mx:Image id="btn4" source="assets/img/32/32-btn4.swf"
            x="0" y="0"
            width="100%"
            click="klik(event)"/>



    <mx:Image id="txt1" source="assets/img/32/32-txt1.swf"
            x="{-pgW}" y="0"
            width="100%"/>

    <mx:Image id="txt2" source="assets/img/32/32-txt2.swf"
            x="{-pgW}" y="0"
            width="100%"/>

    <mx:Image id="txt3" source="assets/img/32/32-txt3.swf"
            x="{-pgW}" y="0"
            width="100%"/>

    <mx:Image id="txt4" source="assets/img/32/32-txt4.swf"
            x="{-pgW}" y="0"
            width="100%"/>
</mx:Canvas>

非常感谢您的宝贵时间!

米。

I was programming in php for a while but it was all procedural-oriented. Now I have a project in Flex 3 and I made a simple script which animates (moves) few objects but I think that I am missing the point of object-oriented programming here because I am repeating some stuff over and over... Maybe it is mixed together with all of confusions I still have regarding AS3, so please tell me is there any 'smarter' way of writing this code:

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"
    width="100%" height="100%"
    paddingBottom="0" paddingLeft="0" paddingRight="0" paddingTop="0"
    horizontalScrollPolicy="off" verticalScrollPolicy="off"
    creationComplete="init()">

    <mx:Script>
        <![CDATA[
            import mx.events.EffectEvent;

            public var opened1:Boolean;
            public var opened2:Boolean;
            public var opened3:Boolean;
            public var opened4:Boolean;

            [Bindable] public var pgW:Number;

            private function init():void{
                pgW = this.width;

                opened1 = false;
                opened2 = false;
                opened3 = false;
                opened4 = false;

                addListeners();
            }

            private function mouseOver1(event:MouseEvent):void{
                removeListeners();

                if (opened2){
                    moveOut.target = txt2;
                }
                if (opened3){
                    moveOut.target = txt3;
                }
                if (opened4){
                    moveOut.target = txt4;
                }

                moveOut.play();
                setOpened(1);
                moveIn.target = txt1;
                moveIn.play();
            }

            private function mouseOver2(event:MouseEvent):void{
                removeListeners();

                if (opened1){
                    moveOut.target = txt1;
                }
                if (opened3){
                    moveOut.target = txt3;
                }
                if (opened4){
                    moveOut.target = txt4;
                }

                moveOut.play();
                setOpened(2);
                moveIn.target = txt2;
                moveIn.play();
            }

            private function mouseOver3(event:MouseEvent):void{
                removeListeners();

                if (opened1){
                    moveOut.target = txt1;
                }
                if (opened2){
                    moveOut.target = txt2;
                }
                if (opened4){
                    moveOut.target = txt4;
                }

                moveOut.play();
                setOpened(3);
                moveIn.target = txt3;
                moveIn.play();
            }

            private function mouseOver4(event:MouseEvent):void{
                removeListeners();

                if (opened1){
                    moveOut.target = txt1;
                }
                if (opened2){
                    moveOut.target = txt2;
                }
                if (opened3){
                    moveOut.target = txt3;
                }

                moveOut.play();
                setOpened(4);
                moveIn.target = txt4;
                moveIn.play();
            }




            private function addListeners():void{
                btn1.addEventListener(MouseEvent.MOUSE_DOWN, mouseOver1);
                btn2.addEventListener(MouseEvent.MOUSE_DOWN, mouseOver2);
                btn3.addEventListener(MouseEvent.MOUSE_DOWN, mouseOver3);
                btn4.addEventListener(MouseEvent.MOUSE_DOWN, mouseOver4);
            }

            private function removeListeners():void{
                btn1.removeEventListener(MouseEvent.MOUSE_DOWN, mouseOver1);
                btn2.removeEventListener(MouseEvent.MOUSE_DOWN, mouseOver2);
                btn3.removeEventListener(MouseEvent.MOUSE_DOWN, mouseOver3);
                btn4.removeEventListener(MouseEvent.MOUSE_DOWN, mouseOver4);
            }

            private function setOpened(nr:int):void{
                if (nr == 1){
                    opened1 = true;
                    opened2 = false;
                    opened3 = false;
                    opened4 = false;
                }
                if (nr == 2){
                    opened1 = false;
                    opened2 = true;
                    opened3 = false;
                    opened4 = false;
                }
                if (nr == 3){
                    opened1 = false;
                    opened2 = false;
                    opened3 = true;
                    opened4 = false;
                }
                if (nr == 4){
                    opened1 = false;
                    opened2 = false;
                    opened3 = false;
                    opened4 = true;
                }
                trace("opened" + nr);
            }

            private function setPositions(event:EffectEvent):void{
                event.effectInstance.target.x = -(pgW);
            }

            private function klik(event:MouseEvent):void {
                event.stopPropagation();
            }
        ]]>
    </mx:Script>

    <mx:Move id="moveIn"
        xFrom="{-pgW}" xTo="0"
        yFrom="0" yTo="0"
        duration="1000"
        effectEnd="addListeners();"/>

    <mx:Move id="moveOut"
        xFrom="0" xTo="0"
        yFrom="0" yTo="250"
        duration="1000"/>


    <mx:Image id="btn1" source="assets/img/32/32-btn1.swf"
            x="0" y="0"
            width="100%"
            click="klik(event)"/>

    <mx:Image id="btn2" source="assets/img/32/32-btn2.swf"
            x="0" y="0"
            width="100%"
            click="klik(event)"/>

    <mx:Image id="btn3" source="assets/img/32/32-btn3.swf"
            x="0" y="0"
            width="100%"
            click="klik(event)"/>

    <mx:Image id="btn4" source="assets/img/32/32-btn4.swf"
            x="0" y="0"
            width="100%"
            click="klik(event)"/>



    <mx:Image id="txt1" source="assets/img/32/32-txt1.swf"
            x="{-pgW}" y="0"
            width="100%"/>

    <mx:Image id="txt2" source="assets/img/32/32-txt2.swf"
            x="{-pgW}" y="0"
            width="100%"/>

    <mx:Image id="txt3" source="assets/img/32/32-txt3.swf"
            x="{-pgW}" y="0"
            width="100%"/>

    <mx:Image id="txt4" source="assets/img/32/32-txt4.swf"
            x="{-pgW}" y="0"
            width="100%"/>
</mx:Canvas>

Thank you very much for your time!

m.

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评论(4

铜锣湾横着走 2024-08-15 09:06:43

您的示例代码非常适合 OO(面向对象)。

您有四件事(您将使用一个类来定义),它们保存对按钮、文本、打开状态等的引用。因此,您将一个类定义为 MXML 组件,该组件保存按钮、文本和任何内容。其他状态,并将方法放在该组件上(在 块中)。另外,您可以在其 creationComplete 方法中初始化组件,以便在完成初始绘制时 open 变量为 false。甚至您的 mouseOver 方法也是完美的:您可以让对象决定是否需要执行某些操作(并且 MXML 组件将自动进行事件处理)。基本上,这就是我们想要的:MXML 组件处理其自己的内部状态,而不是拥有必须管理列表状态的外部对象。

由于 MouseOver 方法将被放入 MXML 组件中,因此每个组件都必须保存对其他组件的引用。有很多方法可以做到这一点,包括在早些时候传递一个引用并存储它,或者使用一个静态变量来保存其他 x 个对象的列表。

希望这有一定道理并有所帮助。

Your sample code is PERFECT for being OO'ed (made object oriented).

You have four things (which you'll define using one class) which hold a reference to a Button, a text, an open state, etc. So you define one class as an MXML component which holds a button, a text, and any other state and you put the methods ON THAT COMPONENT (in the <mx:Script> block). Plus you initialize the component in it's creationComplete method so that the open variable is false when it finishes the intial drawing. Even your mouseOver method is perfect: you can let the objects decide if they need to do something or not (and the MXML component will automatically have the event handling). Basically, that's what we're going for: the MXML component deals with its own internal state rather than having an external object which has to manage state for a list.

Since the MouseOver method would be put in your MXML component, each would have to hold references to the others. There are many ways to do this, including passing a reference at some point earlier and storing it, or having a static var that holds a list of the other x number of objects.

Hope that makes some sense and helps.

背叛残局 2024-08-15 09:06:43

而是做类似的事情。在伪代码中:

init()
  btn[] = create array of buttons
  txt[] = create array of txt
  opened[] = create array of boolean
  opened[] = false
  for each btn
           btn.mouseover = mouseover
           add listeners

mouseover
  remove listeners
  i = find source btn index from event
  moveout.target = movein.target
  moveout.play
  opened[] = false
  opened[i] = true
  movein.target = txt[i]
  movein.play

可能您不需要打开的变量。

Rather do something like. In pseudocode:

init()
  btn[] = create array of buttons
  txt[] = create array of txt
  opened[] = create array of boolean
  opened[] = false
  for each btn
           btn.mouseover = mouseover
           add listeners

mouseover
  remove listeners
  i = find source btn index from event
  moveout.target = movein.target
  moveout.play
  opened[] = false
  opened[i] = true
  movein.target = txt[i]
  movein.play

Probably you won't need the opened variables.

潜移默化 2024-08-15 09:06:43

事实上,如果opened3true,则执行以下代码段后moveOut.target的值将始终为txt3(无论opened2/3 的值如何)。这是设计使然,还是 opened1/2/3/4 相互排斥(一次只能有一个为真),或者您是否缺少 else 语句或...?

if (opened1){
 moveOut.target = txt1;
}
if (opened2){
 moveOut.target = txt2;
}
if (opened3){
 moveOut.target = txt3;
}

As a matter of fact, the value of moveOut.target after executing the following code segment will always be txt3 if opened3 is true (irrespective of the values of opened2/3). Is that by design or are opened1/2/3/4 mutually exclusive (only one can be true at a time) or are you missing else statements or ...?

if (opened1){
 moveOut.target = txt1;
}
if (opened2){
 moveOut.target = txt2;
}
if (opened3){
 moveOut.target = txt3;
}
影子是时光的心 2024-08-15 09:06:43

遵循一些有关构建应用程序的教程,使用一些模式,尝试 MVC 或 MVP,查看 Smartypants IOC

Follow some tutorial on architecting applications, use some patterns, try out MVC or MVP, checkout Smartypants IOC

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