» IconUtil

IconUtility用于方便的在flex源文件mxml里设置组件的icon为网络图标,而非Class类,但对于TabNavigator却不管用.经过仔细研究,终于还是修复了这个bug. 示例 不能看到示例的请到原文看吧 源码 IconUtilTest.mxml 源码 IconUtil.as 源码 /********************************************************************************************************************************* Copyright (c) 2007 Ben Stucki Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. *********************************************************************************************************************************/ package com.litefeel.utils { import flash.display.BitmapData; import flash.display.DisplayObject; import flash.display.Loader; import flash.display.LoaderInfo; import flash.events.Event; import flash.geom.Matrix; import flash.net.URLRequest; import flash.system.LoaderContext; import flash.utils.Dictionary; import mx.containers.TabNavigator; import mx.containers.accordionClasses.AccordionHeader; import mx.controls.TabBar; import mx.controls.tabBarClasses.Tab; import mx.core.BitmapAsset; import mx.core.UIComponent; /** * Provides a workaround for using run-time loaded graphics in styles and properties which require a Class reference */ public class IconUtil extends BitmapAsset { private static var dictionary:Dictionary; /** * Used to associate run-time graphics with a target * @param target A reference to the component associated with this icon * @param source A url to a JPG, PNG or GIF file you wish to be loaded and displayed or A DisplayObject * @param width Defines the width of the graphic when displayed * @param height Defines the height of the graphic when displayed * @return A reference to the IconUtility class which may be treated as a BitmapAsset * @example &lt;mx:Button id"button" icon"{IconUtility.getClass(button, 'http://www.yourdomain.com/images/test.jpg')}" /&gt; */ public static function getClass( target:UIComponent, source:Object, width:Number NaN, height:Number NaN ):Class { if(!target) return null; if(!dictionary) { dictionary new Dictionary(true); } if(source is String) { var loader:Loader new Loader(); loader.load(new URLRequest(source as String), new LoaderContext(true)); source loader; }else if (source is DisplayObject) { } dictionary { source:source, width:width, height:height }; return IconUtil; } /** * @private */ public function IconUtil() { addEventListener(Event.ADDED, addedHandler, false, 0, true) } private function addedHandler(event:Event):void { if(parent) { if(parent is AccordionHeader) { var header:AccordionHeader parent as AccordionHeader; getData(header.data); } else if(parent is Tab) { var tab:Tab parent as Tab; if(tab.data) getData(tab.data); else if("owner" in tab.owner && tab.owner is TabNavigator) { getDataByOwner(TabNavigator(tab.owner), tab, TabBar(tab.owner)); } } else { getData(parent); } } } private function getDataByOwner(nav:TabNavigator, tab:Tab, tabBar:TabBar):void { var idx:int tabBar.getChildIndex(tab); var ui:DisplayObject nav.getChildAt(idx); getData(ui); } private function getData(object:Object):void { var data:Object dictionary; if(data) { var source:Object data.source; if(data.width > 0 && data.height > 0) { bitmapData new BitmapData(data.width, data.height, true, 0x00FFFFFF); } if(source is Loader) { var loader:Loader source as Loader; if(!loader.content) { loader.contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler, false, 0, true); } else { displayIcon(loader); } }else if (source is DisplayObject) { displayIcon(source as DisplayObject); } } } private function displayIcon( display:DisplayObject ):void { if(!bitmapData) { bitmapData new BitmapData(display.width, display.height, true, 0x00FFFFFF); } bitmapData.draw(display, new Matrix(bitmapData.width/display.width, 0, 0, bitmapData.height/display.height, 0, 0)); if(parent is UIComponent) { var component:UIComponent parent as UIComponent; component.invalidateSize(); removeEventListener(Event.ADDED, addedHandler); } } private function completeHandler(event:Event):void { if(event && event.target && event.target is LoaderInfo) { displayIcon(event.target.loader as Loader); } } } } 源代码打包下载 下载链接：IconUtilTest.zip

LiteFeel

IconUtility对TabNavigator设置icon时失效的问题解决