Flash舞台随窗口大小动态调整.docx

本文介绍如何建立一个舞台随窗体尺寸大小动态改变的Flash例子，使用的脚本为AS3.01. 建立工程2. 新建一个AS文件，主要实现舞台的动态缩放功能代码如下：package import flash.display.Sprite;import flash.display.Stage;import flash.events.Event;import flash.external.ExternalInterface;public class BrowserCanvas public static const HACK_MARGIN_BOTTOM:String = marginBottom; /Adds a negative bottom margin to object tags to compensate for browser weirdnesspublic static const HACK_IE_REPARENT:String = IEReparent; /In IE, create a container div which encapsulates the object tag in order to hav min/max sizes workpublic static const HACK_UNIQUE_ID:String = uniqueId; /If you put both an embed and object tag with the same id, this tries to compensateprivate var stage:Stage;private var containerId:String;private var _width:String;private var _minWidth:String;private var _maxWidth:String;private var _height:String;private var _minHeight:String;private var _maxHeight:String;private var timerSprite:Sprite;public function BrowserCanvas ( stage:Stage,containerId:String=null , browserHacks:Array=null ) trace(BrowserCanvas - Copyright (c) 2008 Noel Billig ();this.stage = stage;timerSprite = new Sprite();_width = String( stage.stageWidth );_height = String( stage.stageHeight );if (browserHacks = null) browserHacks = HACK_MARGIN_BOTTOM,HACK_IE_REPARENT,HACK_UNIQUE_ID;this.containerId = containerId;if (this.containerId = null) this.containerId = ExternalInterface.objectID;if (this.containerId = null) this.containerId = ExternalInterface.call(JSScripts.GET_FLASH_ID, stage.loaderInfo.url);if (browserHacks.length != 0) this.containerId = ExternalInterface.call(JSScripts.INSERT_BROWSER_HACKS, this.containerId, browserHacks.join(,);public function set width(newWidth:String):void this._width = formatSize(newWidth);invalidate();public function set minWidth(newWidth:String):void this._minWidth = formatSize(newWidth);invalidate();public function set maxWidth(newWidth:String):void this._maxWidth = formatSize(newWidth);invalidate();public function set height(newHeight:String):void this._height = formatSize(newHeight);invalidate();public function set minHeight(newHeight:String):void this._minHeight = formatSize(newHeight);invalidate();public function set maxHeight(newHeight:String):void this._maxHeight = formatSize(newHeight);invalidate();private function formatSize(size:String):String if (size = null) return ; /Null causes opera to never clear the appropriate values, so use empty stringreturn (int(size) = 0) ? size : size+px;private function invalidate():void timerSprite.addEventListener(Event.ENTER_FRAME,update);private function update(event:Event):void timerSprite.removeEventListener(Event.ENTER_FRAME,update);ExternalInterface.call(JSScripts.RESIZE_CONTAINER,containerId,_width,_height,_minWidth,_minHeight,_maxWidth,_maxHeight);class JSScripts public static var GET_FLASH_ID:XML = !CDATAfunction(swfFullPath) var getFileName = function(fullPath) var ary = fullPath.split(/);var fileName = aryary.length-1.split(.swf)0;return fileName;var ensureId = function(node) if (node.attributesid = null) node.setAttribute(id,swf+new Date().getTime();var matchesTarget = function(fullPath) return (getFileName(fullPath) = targetSwfName);var targetSwfName = getFileName(swfFullPath);/Look through the embed nodes for one that matches our swf namevar nodes = document.getElementsByTagName(embed);for (var i=0; i nodes.length; i+) /Parse just the SWF file name out of the whole src path and check if it matchesif (matchesTarget(nodesi.attributessrc.nodeValue) ensureId(nodesi);return nodesi.attributesid.nodeValue;/If we havent found a matching embed, look through the object nodesnodes = document.getElementsByTagName(object);for (var j=0; j nodes.length; j+) /Check if the object tag has a data nodeif (nodesj.attributesdata != null) if (matchesTarget(nodesj.attributesdata.nodeValue) ensureId(nodesj);return nodesj.attributesid.nodeValue;/Grab the param nodes out of this object, and look for one named movievar paramNodes = nodesj.getElementsByTagName(param);for (var k=0; k ;public static var INSERT_BROWSER_HACKS:XML = ;public static var RESIZE_CONTAINER:XML = ;3. 建立Flash文件场景相关的类package import flash.display.Sprite;import flash.display.StageAlign;import flash.display.StageScaleMode;import flash.events.Event;import flash.events.MouseEvent;import flash.text.TextField;import flash.text.TextFormat;/导入第2节中建立的类import BrowserCanvas;SWF(width=550, height=400, frameRate=30, backgroundColor=#000000) public class ResizeSceneClass extends Sprite private var canvas:BrowserCanvas;public function ResizeSceneClass () /Set up the stage so we dont scale (you may not want to do this, depending on your desired goal)stage.align = StageAlign.TOP_LEFT;stage.scaleMode = StageScaleMode.NO_SCALE;canvas = new BrowserCanv