Adobe flash cs4 website tutorial: 0109 XML Image Gallery

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Fla Timeline code: var xml:XML = new XML(); var img_count:uint; var loader:URLLoader = new URLLoader(); var img_holder:Sprite=new Sprite(); var sw:Number=stage.stageWidth; addChild(img_holder); function xmlloaded(e:Event):void { xml=XML(e.target.data); img_count = xml.img.length()-1; for (var i:uint = 0; i<img_count; i++) { var thumb:Sprite=new createThumb(img_holder,String(xml.img[i].@thumburl),String(xml.img[i].@mainurl)); thumb.x=205*i; img_holder.addChild(thumb); } stage.addEventListener(Event.ENTER_FRAME,mousescroll); } function mousescroll(e:Event):void { var ihw:Number = (img_holder.width-sw+100)*-1; var percent:Number = 50+(mouseX/sw)*(ihw); img_holder.x=percent; } loader.load(new URLRequest('photogallery.xml')); loader.addEventListener(Event.COMPLETE,xmlloaded); createThumb Class: /* VERSION: 0.1 DATE: 6/27/2009 ACTIONSCRIPT VERSION: 3.0 UPDATES & MORE DETAILED DOCUMENTATION AT: http://www.onenterflash.com DESCRIPTION: Loads and displays a thumb and main picture on click of thumb image. EXAMPLES: ** var img_holder:Sprite=new Sprite(); var thumb:Sprite=new createThumb(img_holder,'smallimage/file.png','largeimage/file.png'); thumb.x=205*i; img_holder.addChild(thumb); addChild(img_holder); ** CODED BY: Waarith Abdul-Majeed, questions@onenterflash.com Copyright 2009, OnEnterFlash */ package { import flash.display.Loader; import flash.display.Sprite; import flash.display.Bitmap; import fl.transitions.Tween; import fl.transitions.TweenEvent; import fl.transitions.easing.*; import flash.events.MouseEvent; import flash.events.Event; import flash.net.URLRequest; public class createThumb extends Sprite { private var arraytween:Array = new Array(); private var thumb_loader:Loader; private var photo_loader:Loader; private var thumb_url:String; private var photo_url:String; private var thumb_bit:Bitmap; private var photo_bit:Bitmap; private var mother:Sprite; private var thumb_btn:Sprite; public function createThumb(childof:Sprite,thumburl:String,photourl:String) { mother=childof; thumb_url=thumburl; photo_url=photourl; loadthumb(); } private function loadthumb():void { thumb_loader = new Loader(); thumb_loader.load(new URLRequest(thumb_url)); thumb_loader.contentLoaderInfo.addEventListener(Event.COMPLETE,displaythumb); } private function displaythumb(e:Event):void { thumb_btn = new Sprite(); thumb_bit= new Bitmap(); thumb_btn.graphics.beginFill(0x000000,0); thumb_btn.graphics.drawRect(0,0,200,200); thumb_btn.graphics.endFill(); thumb_bit=e.target.content as Bitmap; thumb_btn.width=thumb_btn.height=thumb_bit.width=thumb_bit.height=200; thumb_bit.smoothing=true; addChild(thumb_bit); addChild(thumb_btn); thumb_btn.addEventListener(MouseEvent.CLICK,loadphoto); } private function loadphoto(e:Event):void { arraytween.push(new Tween(mother,"y",Regular.easeOut,mother.y,400,.5,true)); photo_loader = new Loader(); photo_loader.load(new URLRequest(photo_url)); photo_loader.contentLoaderInfo.addEventListener(Event.COMPLETE,displayphoto); } private function displayphoto(e:Event):void { stage.addEventListener(MouseEvent.CLICK,closephoto); photo_bit= new Bitmap(); photo_bit=e.target.content as Bitmap; photo_bit.smoothing=true; photo_bit.x=(stage.stageWidth-photo_bit.width)/2; photo_bit.y=(stage.stageHeight-photo_bit.height)/2; stage.addChild(photo_bit); } private function closephoto(e:Event):void { arraytween.push(new Tween(mother,"y",Strong.easeOut,mother.y,0,.5,true)); arraytween[arraytween.length-1].addEventListener(TweenEvent.MOTION_FINISH,cleartween); photo_loader.unload(); if (photo_bit!=null) { stage.removeChild(photo_bit); } stage.removeEventListener(MouseEvent.CLICK,closephoto); } private function cleartween(e:TweenEvent):void { arraytween=[]; } } }