Представление компонентов в виде списка. Flex

Создать ItemVO.as с кодом:

package<br>{<br>import flash.events.IEventDispatcher;<br>import flash.events.EventDispatcher;<br>[Bindable]<br>public class ItemVO extends EventDispatcher<br>{<br>public var label : String;<br>public var checked : Boolean;<br>}<br>}<br>

Создать CheckBoxItemRender.mxml с кодом:

<?xml version="1.0" encoding="utf-8"?><br><?xml:namespace prefix = mx /><mx:canvas height="20" width="100" mx="http://www.adobe.com/2006/mxml"><br><mx:checkbox id="checker" change="{data.checked = checker.selected}" selected="{data.checked}" label="{data.label}"></mx:checkbox><br></mx:canvas><br>

Создать ComponentListTest.mxml с кодом:

<?xml version="1.0" encoding="utf-8"?><br><!-- Tree control example. --><br><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:local="*" layout="vertical"><br><mx:Script><br><![CDATA[<br>public function clearItems() : void<br>{<br>for (var i : Number=0; i<arcoltest.length; i++)<br>{<br>arcoltest.getItemAt(i).checked = false;<br>}<br>}<br>]]><br></mx:Script><br><mx:ArrayCollection id="arcoltest"><br><local:ItemVO label="qewqw" checked="true" /><br><local:ItemVO label="1" checked="true" /><br><local:ItemVO label="2" checked="true" /><br><local:ItemVO label="1231" checked="true" /><br><local:ItemVO label="qweqwe" checked="true" /><br></mx:ArrayCollection><br><mx:List dataProvider="{arcoltest}" itemRenderer="CheckBoxItemRender" /><br><mx:Button label="Clear all" click="clearItems()"/><br></mx:Application>

Обработчик события. MXML

Можно добавить обработчик события в скрипте:

video_playback.addEventListener(MouseEvent.MOUSE_OVER,this.onMouseOver);

Или прямо в теге:

<mx:videodisplay id="video_playback" height="302" width="697" y="74" x="37.5" autoplay="true" mouseover="onMouseOver(event);"></mx:videodisplay>

Класс Dictionary. AS3

Пример перебора элементов Dictionary:

import flash.utils.Dictionary;<br><br>var a:Object = new Object();<br>var b:Object = new Object();<br><br>var dict:Dictionary = new Dictionary();<br>dict[a] = 1; // dict[a] = 1;<br>dict[b] = 2; // dict[b] = 2;<br><br>for (var prop:* in dict) {<br>trace(prop); // traces: [object Object], [object Object]<br>trace(dict[prop]); // traces: 1, 2<br>}

Источник.

Удаление элемента из Dictionary:

delete dict[a];

Код для статьи "Делаем прелоадер для Flex-приложения". AS3.

Код основного класса MainClass:

package {<br>import flash.display.Sprite;<br>import flash.display.Bitmap;<br><br>[Frame(factoryClass="MyFactory")]<br>public class FrameTest extends Sprite<br>{<br>[Embed(source="big_asset.jpg")]<br>private var Asset:Class;<br><br>public function FrameTest()<br>{<br>init();<br>}<br><br>public function init():void<br>{<br>var asset:Bitmap = new Asset();<br>addChild(asset);<br>}<br>}<br>}<br>

Код класса фабрики MyFactoryClass:

package<br>{<br>import flash.display.DisplayObject;<br>import flash.display.MovieClip;<br>import flash.display.StageAlign;<br>import flash.display.StageScaleMode;<br>import flash.events.Event;<br>import flash.utils.getDefinitionByName;<br><br>public class MyFactory extends MovieClip<br>{<br>public function MyFactory()<br>{<br>stop();<br>stage.scaleMode = StageScaleMode.NO_SCALE;<br>stage.align = StageAlign.TOP_LEFT;<br>addEventListener(Event.ENTER_FRAME, onEnterFrame);<br>}<br><br>public function onEnterFrame(event:Event):void<br>{<br>graphics.clear();<br>if(framesLoaded == totalFrames)<br>{<br>removeEventListener(Event.ENTER_FRAME, onEnterFrame);<br>nextFrame();<br>init();<br>}<br>else<br>{<br>var percent:Number = root.loaderInfo.bytesLoaded / root.loaderInfo.bytesTotal;<br>graphics.beginFill(0);<br>graphics.drawRect(0, stage.stageHeight / 2 - 10,<br>stage.stageWidth * percent, 20);<br>graphics.endFill();<br>}<br>}<br><br>private function init():void<br>{<br>var mainClass:Class = Class(getDefinitionByName("FrameTest"));<br>if(mainClass)<br>{<br>var app:Object = new mainClass();<br>addChild(app as DisplayObject);<br>}<br>}<br>}<br>}<br><br>