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Posted to commits@flex.apache.org by ah...@apache.org on 2014/04/26 01:35:19 UTC
[34/51] [partial] ADC articles donated by Adobe Systems Inc
http://git-wip-us.apache.org/repos/asf/flex-external/blob/1bcc0e18/ADC/devnet/flex/articles/flex3and4_differences.html
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+ <meta name="description" content="Learn about the differences in architecture, components, layouts, use of states, and effects." /><meta name="creationDate" content="2010-09-28 @ 20:37:34" />
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+<meta name="author" content="Joan Lafferty" />
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+ <li class="SiteHeaderPanelLink"><a href="https://www.acrobat.com/formscentral/en/home.html?promoid=KAUCZ" target="_blank" id="Products_DocumentServices_FormsCentral"><span class="SiteHeaderIconNewWindowNoWrap">FormsCentral<span class="SiteHeaderIconNewWindow"> [opens in a new window]</span></span></a></li>
+ <li class="SiteHeaderPanelLink"><a href="https://www.acrobat.com/sendnow/en/home.html?promoid=KAUDA" target="_blank" id="Products_DocumentServices_SendNow"><span class="SiteHeaderIconNewWindowNoWrap">SendNow<span class="SiteHeaderIconNewWindow"> [opens in a new window]</span></span></a></li>
+ <li class="SiteHeaderPanelLink"><a href="https://www.acrobat.com/welcome/en/home.html?promoid=KAUDC" target="_blank" id="Products_DocumentServices_Acrobatcom"><span class="SiteHeaderIconNewWindowNoWrap">Acrobat.com<span class="SiteHeaderIconNewWindow"> [opens in a new window]</span></span></a></li>
+ </ul>
+
+ <p class="SiteHeaderPanelHeader">Publishing</p>
+ <ul class="SiteHeaderPanelLinkNoBottom">
+ <li class="SiteHeaderPanelLink"><a href="/products/digital-publishing-suite-family.html?promoid=JOLIU" id="Products_Publishing_DigitalPublishingSuite">Digital Publishing Suite</a></li>
+ </ul>
+ </div>
+ </div>
+ <br style="clear: both" />
+
+ <div class="SiteHeaderRow">
+ <ul class="SiteHeaderRightLink">
+ <li class="SiteHeaderPanelLink"><a href="/products/catalog.html?promoid=JOOTH" id="Products_Seeallproducts">See all products</a></li>
+ </ul>
+ </div>
+ </div>
+ </div>
+ <div class="SiteHeaderDropdownLink SiteHeaderBarItem" id="shBusinessSolutions">
+ <a href="/solutions.html?promoid=KAWQJ" id="shBusinessSolutionsLink" class="SiteHeaderBarLink">Business solutions</a>
+ <div class="SiteHeaderDropPanel SiteHeaderDropdown-Double" id="BusinessSolutionsPanel">
+ <div class="SiteHeaderRow">
+ <div class="SiteHeaderColumn-1">
+ <p class="SiteHeaderPanelHeaderSmall">By business need</p>
+ <ul>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/digital-analytics.html?promoid=JOLJB" id="BusinessSolutions_Bybusinessneed_Digitalanalytics">Digital analytics</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/digital-publishing.html?promoid=JOLJA" id="BusinessSolutions_Bybusinessneed_Digitalpublishing">Digital publishing</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/products/acrobat.html?promoid=KAWSC" id="BusinessSolutions_Bybusinessneed_Documentmanagement">Document management</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/media-optimization.html?promoid=JOLIX" id="BusinessSolutions_Bybusinessneed_Mediaoptimization">Media optimization</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/social-marketing.html?promoid=JZPNO" id="BusinessSolutions_Bybusinessneed_Socialmarketing">Social marketing</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/testing-targeting.html?promoid=KAXLU" id="BusinessSolutions_Bybusinessneed_Testingandtargeting">Testing and targeting</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/products/creativecloud/video.html?promoid=KAUDD" id="BusinessSolutions_Bybusinessneed_Videoeditingandserving">Video editing and serving</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://html.adobe.com?promoid=JZEFF" target="_blank" class="SiteHeaderLinkNewWindow" id="BusinessSolutions_Bybusinessneed_Webdevelopment">Web <span class="SiteHeaderIconNewWindowNoWrap">development<span class="SiteHeaderIconNewWindow"> [opens in a new window]</span></span></a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/web-experience-management.html?promoid=JOOYM" id="BusinessSolutions_Bybusinessneed_Webexperiencemanagement">Web experience management</a></li>
+ </ul>
+
+ <ul class="SiteHeaderPanelLinkNoBottom">
+ <li class="SiteHeaderPanelLink"><a href="/solutions.html?promoid=JOOTI" id="BusinessSolutions_Seeallbusinessneeds">See all business needs</a></li>
+ </ul>
+ </div>
+
+ <div class="SiteHeaderColumn-2">
+ <p class="SiteHeaderPanelHeaderSmall">By industry</p>
+ <ul>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/broadcasting.html?promoid=JOLIY" id="BusinessSolutions_Byindustry_Broadcast">Broadcast</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/education.html?marketSegment=EDU&promoid=JOLIZ" id="BusinessSolutions_Byindustry_Education">Education</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/financial-services.html?promoid=KAUDE" id="BusinessSolutions_Byindustry_Financialservices">Financial services</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/government.html?promoid=KAUDF" id="BusinessSolutions_Byindustry_Government">Government</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/digital-publishing.html?promoid=KAUDG" id="BusinessSolutions_Byindustry_Publishing">Publishing</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/retail.html?promoid=KAWSD" id="BusinessSolutions_Byindustry_Retail">Retail</a></li>
+ </ul>
+
+ <ul class="SiteHeaderPanelLinkNoBottom">
+ <li class="SiteHeaderPanelLink"><a href="/solutions.html?promoid=KAUDH" id="BusinessSolutions_Seeallindustries">See all industries</a></li>
+ </ul>
+ </div>
+ </div>
+ </div>
+ </div>
+ <div class="SiteHeaderDropdownLink SiteHeaderBarItem" id="shSupportLearning">
+ <a href="http://helpx.adobe.com/support/?promoid=KAWQK" id="shSupportLearningLink" class="SiteHeaderBarLink">Support & Learning</a>
+ <div class="SiteHeaderDropPanel SiteHeaderDropdown-Single" id="SupportLearningPanel">
+ <div class="SiteHeaderRow">
+ <p class="SiteHeaderPanelHeaderSmall">I need help</p>
+ <ul>
+ <li class="SiteHeaderPanelLink"><a href="http://helpx.adobe.com/support/?promoid=JZEFP" id="SupportLearning_Ineedhelp_Products">Products</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://helpx.adobe.com/creative-cloud/topics/getting-started.html?promoid=JZEFO" id="SupportLearning_Ineedhelp_AdobeCreativeCloud">Adobe Creative Cloud</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://helpx.adobe.com/marketing-cloud.html?promoid=KAWSE" id="SupportLearning_Ineedhelp_AdobeMarketingCloud">Adobe Marketing Cloud</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://forums.adobe.com/index.jspa?promoid=JZEFM" target="_blank" id="SupportLearning_Ineedhelp_Forums"><span class="SiteHeaderIconNewWindowNoWrap">Forums<span class="SiteHeaderIconNewWindow"> [opens in a new window]</span></span></a></li>
+ </ul>
+
+ <p class="SiteHeaderPanelHeaderSmall">I want to learn</p>
+ <ul class="SiteHeaderPanelLinkNoBottom">
+ <li class="SiteHeaderPanelLink"><a href="http://helpx.adobe.com/learning.html?promoid=KAUDK" id="SupportLearning_Iwanttolearn_Trainingandtutorials">Training and tutorials</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://training.adobe.com/certification.html?promoid=KAUDM" target="_blank" id="SupportLearning_Iwanttolearn_Certification"><span class="SiteHeaderIconNewWindowNoWrap">Certification<span class="SiteHeaderIconNewWindow"> [opens in a new window]</span></span></a></li>
+ <li class="SiteHeaderPanelLink"><a href="/devnet.html?promoid=KAUDN" id="SupportLearning_Iwanttolearn_AdobeDeveloperConnection">Adobe Developer Connection</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/designcenter.html?promoid=KAUDO" id="SupportLearning_Iwanttolearn_AdobeDesignCenter">Adobe Design Center</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://tv.adobe.com?promoid=KFELF" target="_blank" id="SupportLearning_Iwanttolearn_AdobeTV">Adobe <span class="SiteHeaderIconNewWindowNoWrap">TV<span class="SiteHeaderIconNewWindow"> [opens in a new window]</span></span></a></li>
+ <li class="SiteHeaderPanelLink"><a href="/solutions/digital-marketing/guides.html?promoid=KAWSF" id="SupportLearning_Iwanttolearn_AdobeMarketingCenter">Adobe Marketing Center</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://labs.adobe.com/?promoid=JZEFQ" target="_blank" id="SupportLearning_Iwanttolearn_AdobeLabs">Adobe <span class="SiteHeaderIconNewWindowNoWrap">Labs<span class="SiteHeaderIconNewWindow"> [opens in a new window]</span></span></a></li>
+ </ul>
+ </div>
+ </div>
+ </div>
+ <div class="SiteHeaderDropdownLink SiteHeaderBarItem" id="shDownload">
+ <a href="/downloads/?promoid=KAWQL" id="shDownloadLink" class="SiteHeaderBarLink">Download</a>
+ <div class="SiteHeaderDropPanel SiteHeaderDropdown-Single" id="DownloadPanel">
+ <div class="SiteHeaderRow">
+ <ul>
+ <li class="SiteHeaderPanelLink"><a href="/downloads/?promoid=JZEFS" id="Download_Producttrials">Product trials</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://get.adobe.com/flashplayer/?promoid=JZEFT" id="Download_AdobeFlashPlayer">Adobe Flash Player</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://get.adobe.com/reader/?promoid=JZEFU" id="Download_AdobeReader">Adobe Reader</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://get.adobe.com/air/?promoid=JZEFV" id="Download_AdobeAIR">Adobe AIR</a></li>
+ </ul>
+
+ <ul class="SiteHeaderPanelLinkNoBottom">
+ <li class="SiteHeaderPanelLink"><a href="/downloads/?promoid=JZEFW" id="Download_Seealldownloads">See all downloads</a></li>
+ </ul>
+ </div>
+ </div>
+ </div>
+ <div class="SiteHeaderDropdownLink SiteHeaderBarItem" id="shCompany">
+ <a href="/company.html?promoid=KAWQM" id="shCompanyLink" class="SiteHeaderBarLink">Company</a>
+ <div class="SiteHeaderDropPanel SiteHeaderDropdown-Single" id="CompanyPanel">
+ <div class="SiteHeaderRow">
+ <ul>
+ <li class="SiteHeaderPanelLink"><a href="/careers.html?promoid=JZEFX" id="Company_CareersatAdobe">Careers at Adobe</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/aboutadobe/invrelations/?promoid=JZEFZ" id="Company_InvestorRelations">Investor Relations</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/aboutadobe/pressroom/?promoid=JZEGA" id="Company_Newsroom">Newsroom</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/privacy.html?promoid=JZEGB" id="Company_Privacy">Privacy</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/corporate-responsibility.html?promoid=JZEFY" id="Company_CorporateResponsibility">Corporate Responsibility</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/customershowcase.html?promoid=KEWBG" id="Company_CustomerShowcase">Customer Showcase</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/company/contact.html?promoid=JZEGC" id="Company_Contactus">Contact us</a></li>
+ </ul>
+
+ <ul class="SiteHeaderPanelLinkNoBottom">
+ <li class="SiteHeaderPanelLink"><a href="/company.html?promoid=JZPLK" id="Company_Morecompanyinfo">More company info</a></li>
+ </ul>
+ </div>
+ </div>
+ </div>
+ <div class="SiteHeaderDropdownLink SiteHeaderBarItem" id="shBuy">
+ <a href="/products/catalog/software._sl_id-contentfilter_sl_catalog_sl_software_sl_mostpopular.html?promoid=KAWQN" id="shBuyLink" class="SiteHeaderBarLink">Buy</a>
+ <div class="SiteHeaderDropPanel SiteHeaderDropdown-Single" id="BuyPanel">
+ <div class="SiteHeaderRow">
+ <ul class="SiteHeaderPanelLinkNoBottom">
+ <li class="SiteHeaderPanelLink"><a href="/products/catalog/software.html?marketSegment=COM&promoid=KAWQO" id="Buy_Forpersonalandprofessionaluse">For personal and professional use</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/products/catalog/software._sl_id-contentfilter_sl_catalog_sl_education_sl_alledu.html?marketSegment=EDU&promoid=KAWQP" id="Buy_Forstudentseducatorsandstaff">For students, educators, and staff</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/products/small-business-pricing/software-catalog._sl_id-contentfilter_sl_catalog_sl_software_sl_creativecloudmembership.html?marketSegment=COM&promoid=JOLJE" id="Buy_Forsmallandmediumbusinesses">For small and medium businesses</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/volume-licensing.html?promoid=KAWQQ" id="Buy_VolumeLicensing">Volume Licensing</a></li>
+ <li class="SiteHeaderPanelLink"><a href="/products/discount-software-coupons.html?promoid=KAWQR" id="Buy_Specialoffers">Special offers</a></li>
+ <li class="SiteHeaderPanelLink"><a href="http://success.adobe.com/en/na/programs/rfi/dm_sales_inquiries.html?promoid=KAWSG" target="_blank" id="Buy_AdobeMarketingCloudsales">Adobe Marketing Cloud <span class="SiteHeaderIconNewWindowNoWrap">sales<span class="SiteHeaderIconNewWindow"> [opens in a new window]</span></span></a></li>
+ </ul>
+ </div>
+ </div>
+ </div>
+
+ <!--
+ <div id="tooltipStrings" class="SiteHeaderTooltipStrings LayoutHidden">
+ <span id="tooltipStringExpandMenu">Expand menu</span>
+ <span id="tooltipStringOpenLink">Open link</span>
+ </div>
+ -->
+
+ <a href="/go/gnav_search" id="shSearchButton" class="SiteHeaderBarItem SiteHeaderSearchButton" style="display: none;">Search</a>
+ <div class="SiteHeaderBarItem SiteHeaderBarItemLast"> </div>
+ <div id="site-search" class="SiteHeaderSearch">
+ <input title="Search" type="text" id="search-input" name="term" maxlength="1000" />
+ <input type="hidden" id="searchbuddy-loc" name="loc" value="en_us" />
+ <button type="submit" id="search-submit" class="icon-replace search">Search</button>
+ </div>
+ </div>
+ <div class="SiteHeaderUser">
+ <div id="shSignInBlock">
+ <a id="shInfo" class="SiteHeaderUserItem SiteHeaderInfo">Info</a>
+ <a href="/account/sign-in.adobedotcom.html" id="shSignIn" class="SiteHeaderUserItem LinkStrong">Sign in</a>
+ <div class="SiteHeaderPopPanelShadow width-250" id="InfoPanelShadow" style="display: none;"></div>
+ <div class="SiteHeaderPopPanel width-250" id="InfoPanel" style="display: none;">
+ <div class="SiteHeaderPanelRow">
+ <span class="SiteHeaderPanelHeader">Why sign in?</span>
+ Sign in to manage your account and access trial downloads, product extensions, community areas, and more.
+ </div>
+ </div>
+ </div>
+
+ <a href="/account.html" id="shWelcome" class="SiteHeaderUserItem SiteHeaderArrow LinkStrong" style="display: none;">Welcome, <span id="screenName"></span></a>
+
+ <div class="SiteHeaderPopPanelShadow" id="WelcomePanelShadow" style="display: none;"></div>
+ <div class="SiteHeaderPopPanel" id="WelcomePanel" style="display: none;">
+ <div class="SiteHeaderPanelRow SiteHeaderPanelLink" id="shMyAccount">
+ <a class="SiteHeaderPanelHeader" href="/go/gnavtray_myadobe_en_us">My Adobe</a>
+ </div>
+ <div class="SiteHeaderPanelRow SiteHeaderPanelLink" id="shMyOrders">
+ <a class="SiteHeaderPanelHeader" href="/go/gnavtray_myadobe_myorders_en_us">My orders</a>
+ </div>
+ <div class="SiteHeaderPanelRow SiteHeaderPanelLink" id="shMyInformation">
+ <a class="SiteHeaderPanelHeader" href="/go/gnavtray_myadobe_myinformation_en_us">My information</a>
+ </div>
+ <div class="SiteHeaderPanelRow SiteHeaderPanelLink" id="shMyPreferences">
+ <a class="SiteHeaderPanelHeader" href="/go/gnavtray_myadobe_mypreferences_en_us">My preferences</a>
+ </div>
+ <div class="SiteHeaderPanelRow SiteHeaderPanelLink" id="shMyProductsServices">
+ <a class="SiteHeaderPanelHeader" href="/go/gnavtray_myadobe_myproducts_services_en_us">My products and services</a>
+ </div>
+ <div class="SiteHeaderPanelRow SiteHeaderPanelLink" id="shSignOut">
+ <a class="SiteHeaderPanelHeader" id="shSignOutLink" href="/cfusion/membership/logout.cfm">Sign out</a>
+ </div>
+ </div>
+
+ <div id="MyCartLinkContainer">
+ <a href="/go/gnav_mycart_en_us" id="shMyCart" class="SiteHeaderUserItem SiteHeaderCart">My cart<span id="cartQuantity"></span></a>
+ </div>
+
+ <a href="/privacy.html" id="shPrivacy" class="SiteHeaderUserItem">Privacy</a>
+ <a href="/go/gnav_myadobe_en_us" id="shMyAdobe" class="SiteHeaderUserItem">My Adobe</a>
+ </div>
+ </div>
+</form>
+
+<div id="SiteHeaderMobile" class="SiteHeaderMobile LayoutHidden LayoutSlim Text TextSmall">
+ <a href="/go/gnav_adobe_logo_en_us" id="shHomeMobile" class="SiteHeaderHome SiteHeaderHomeMobile">Adobe</a>
+
+ <div class="SiteHeaderBar SiteHeaderBarMobile" id="shBarMobile">
+ <span class="SiteHeaderBarItemMobile SiteHeaderBarItemMobileNoLeftBorder" id="shProductsMobileSpan"><a href="/go/gnav_products_en_us" id="shProductsMobile" class="SiteHeaderBarLink">Products</a></span>
+ <span class="SiteHeaderBarItemMobile" id="shSectionsMobileSpan"><a href="#" id="shSectionsMobile" class="SiteHeaderArrowMobile SiteHeaderBarLink">Sections</a></span>
+ <span class="SiteHeaderBarItemMobile" id="shSectionsMobileBuy"><a href="/go/gnav_store_en_us" id="shBuyMobile" class="SiteHeaderBarLink">Buy</a></span>
+ <span class="SiteHeaderBarItemMobile SiteHeaderBarItemMobileNoRightBorder SiteHeaderBarItemMobileNoPadding"> </span>
+ <span class="SiteHeaderBarItemMobile SiteHeaderBarItemMobileNoRightBorder SiteHeaderBarItemFloatRight" id="shSearchMobileSpan"><a href="/go/gnav_search" id="shSearchMobile" class="SiteHeaderSearchButtonMobile">Search</a></span>
+ <span class="SiteHeaderBarItemMobile SiteHeaderBarItemMobileNoLeftBorder SiteHeaderBarItemFloatRight SiteHeaderBarItemMobileNoPadding"> </span>
+ </div>
+ <div class="SiteHeaderBarMobileExtend" id="shBarExtend">
+ <div id="shBarExtendSections" style="display: none;">
+ <div id="shBarExtendSections1" class="SiteHeaderBarMobileExtendSections">
+ <a href="/go/gnav_solutions_en_us" id="shSectionsSolutionsMobile" class="SiteHeaderBarExtendSectionsItem SiteHeaderBarLink">Solutions</a>
+ <a href="/go/gnav_company_en_us" id="shSectionsCompanyMobile" class="SiteHeaderBarExtendSectionsItem SiteHeaderBarLink">Company</a>
+ </div>
+ <div id="shBarExtendSections2" class="SiteHeaderBarMobileExtendSections">
+ <a href="/go/gnav_help_en_us" id="shSectionsHelpMobile" class="SiteHeaderBarExtendSectionsItem SiteHeaderBarLink">Help</a>
+ <a href="/go/gnav_learning_en_us" id="shSectionsLearningMobile" class="SiteHeaderBarExtendSectionsItem SiteHeaderBarLink">Learning</a>
+ </div>
+ </div>
+ <div id="shBarExtendSearch" style="display: none;">
+ <form id="globalnav-search-mobile" class="SiteHeaderSearchMobileForm" name="globalnav-search-mobile" method="get" action="/go/gnav_search" accept-charset="utf-8">
+ <input title="Search" type="text" id="search-input-mobile" name="term" maxlength="1000" />
+ <button type="submit" id="search-submit-mobile">Search</button>
+ </form>
+ </div>
+ </div>
+ <div class="SiteHeaderUser">
+ <a href="/cfusion/membership/index.cfm?loc=en_us&nl=1" id="shSignInMobile" class="SiteHeaderUserItem SiteHeaderUserItemMobile LinkStrong">Sign in</a>
+ <a href="/cfusion/membership/logout.cfm" id="shSignOutMobile" class="SiteHeaderUserItem SiteHeaderUserItemMobile LinkStrong" style="display: none;">Sign out</a>
+ <a href="/privacy.html" id="shPrivacyMobile" class="SiteHeaderUserItem SiteHeaderUserItemMobile">Privacy</a>
+ <a href="/go/gnav_myadobe_en_us" id="shMyAdobeMobile" class="SiteHeaderUserItem SiteHeaderUserItemMobile">My Adobe</a>
+ </div>
+</div>
+<!--googleon: index--><div class="hovercart"><div id="HoverCartModal">
+ <div class="CartHeaderPopPanelShadow HoverCartwidth" id="CartPanelShadow" style="display: none;">
+ <div class="CartHeaderPopPanel HoverCart" id="CartPanel">
+ <div id="HoverCartItem" class="RuleHBottom HoverCart-1-3 LayoutBigRowTop" style="display: none">
+ <div class="LayoutBreakAfter">
+ <div class="HoverCart-1 LayoutHItem">
+ <div style="padding-left:60px;" class=" LayoutBreakAfter LayoutPullout">
+ <div id="HoverCartBoxShotxyz" class="HoverCartBoxShot">
+ <a href="">
+ <img src="" class="LayoutImage" alt=""/>
+ </a>
+ </div>
+ <div style="float:left;width:100%" class="CPodCostCell">
+ <span class="TextStrong ProductName" id="HoverCartHeaderxyz">
+ <a href="#">
+ </a>
+ </span>
+ <div class="LayoutBigRowBottom" id="HoverCartDescriptionxyz">
+ </div>
+ <span id="HoverCartPreOrderHardGoodMsgxyz" style="display:none;" class="TextWarning TextPostScript">Preorder Estimated Availability <span id="HoverCartPreOrderHardGoodMsgDatexyz">Date</span>. Your credit card will not be charged until the product is shipped. Estimated availability date is subject to change.</span>
+ <span id="HoverCartPreOrderSoftGoodMsgxyz" style="display:none;" class="TextWarning TextPostScript">Preorder Estimated Availability <span id="HoverCartPreOrderSoftGoodMsgDatexyz">Date</span>. Your credit card will not be charged until the product is ready to download. Estimated availability date is subject to change.</span>
+
+ </div>
+ </div>
+</div>
+ <div class="LayoutHItem HoverCart-2">
+ <div class="HoverCartQty">
+ Qty:
+ <span id="HoverCartQtyxyz">
+ </span>
+ </div>
+ </div>
+ <div class="LayoutRight">
+ <div class="CheckoutCostDark LayoutRight TextRight">
+ <span id="HoverCartPricexyz">
+ </span>
+ <span id="HoverCartSubscriptionxyz" class="CheckoutSubscription">
+ </span>
+ <div id="HoverCartVatPercentageLabelxyz" class="TextEm TextSmall" style="display:none; max-width: 100px;"><span id="HoverCartVatPercentagePreTextxyz"></span>
+ <span id="HoverCartVatPercentagexyz"></span></div>
+ </div>
+ </div>
+
+ </div>
+ <div class="HoverCartEDUMessage LayoutBigCellBottom" style="display:none">Purchase requires verification of academic eligibility</div>
+ </div>
+ <div id="HoverCartContainer" class="LayoutBreakAfter" style=""></div>
+ <a id="HoverCartMoreItems" class="LayoutBreakAfter" style="text-align: center;" href="/cart.html"></a>
+ <div id="HoverCartButtons" class="HoverCart-1-3">
+ <table border="0" align="right" width="70%">
+ <tr>
+ <td>
+ <div class="TextRight HoverCartSubTotal">Subtotal</div>
+ <div id="ExVatLabel" style="display:none" class="TextEm TextSmall TextRight"></div>
+ </td>
+ <td>
+ <div class="LayoutRight TextRight">
+ <div class="CheckoutCostDark">
+ <span id="HoverCartSubTotal">
+ </span>
+ </div>
+ </div>
+ </td>
+ </tr>
+ <tr id="HoverCartPromotionsRow">
+ <td>
+ <div class="TextRight HoverCartPromotionsLabel HoverCartSubTotal">Promotions</div>
+ </td>
+ <td>
+ <div class="LayoutRight TextRight">
+ <div class="CheckoutCostDark">
+ <span id="HoverCartPromotions">
+ </span>
+ </div>
+ </div>
+ </td>
+ </tr>
+ <tr id="HoverCartShippingRow">
+ <td>
+ <div class="TextRight HoverCartShippingLabel HoverCartSubTotal">Estimated shipping</div>
+ </td>
+ <td>
+ <div class="LayoutRight TextRight">
+ <div class="CheckoutCostDark">
+ <span id="HoverCartShipping">
+ </span>
+ </div>
+ </div>
+ </td>
+ </tr>
+ <tr id="HoverCartVATRow">
+ <td>
+ <div class="TextRight HoverCartVATLabel HoverCartSubTotal">Tax</div>
+ </td>
+ <td>
+ <div class="LayoutRight TextRight">
+ <div class="CheckoutCostDark">
+ <span id="HoverCartVat">
+ </span>
+ </div>
+ <div id="CartTaxHeader">
+ Calculated at checkout</div>
+ </div>
+ </td>
+ </tr>
+ <tr>
+ <td><div class="RuleH"></div></td>
+ <td><div class="RuleH"></div></td>
+ </tr>
+ <tr>
+ <td>
+ <div class="TextRight HoverCartTotalLabel HoverCartSubTotal">Total</div>
+ </td>
+ <td>
+ <div class="LayoutRight TextRight">
+ <div class="CheckoutCostDark">
+ <span id="HoverCartTotal">
+ </span>
+ </div>
+ </div>
+ </td>
+ </tr>
+ </table>
+ <div class="LayoutBreak"></div>
+
+ <div class="HoverCart-1-3 LayoutRight LayoutCellTop LayoutBreakAfter">
+ <a href="/cart.html" id="HoverCartCheckOut" class="CartButtonYellow CartShopCheckOut LayoutRight"><span class="CartBuyIconText">Review and Checkout</span></a>
+ </div>
+ </div>
+ </div>
+ </div>
+ </div>
+<script>
+ /*global jQuery,adobe*/
+ jQuery.createNs("Adobe.Cart.ShoppingCart");
+
+ Adobe.Cart.ShoppingCart.HoverCart = {
+
+ MaxItems: "4",
+
+ DisplayTime: "5000",
+
+ MoreItemsTextSingular: "() more item in your cart",
+
+ MoreItemsTextPlural: "() more items in your cart",
+
+ MonthToMonthText: "per month",
+
+ YearlyText: "per year"
+ };
+
+ Adobe.Cart.TaxLabels = {
+ TaxInclusiveText : "",
+ TaxNotApplicable : "Tax not applicable"
+ };
+
+ Adobe.Cart.ShoppingCart.GlobalVars = {
+
+ CountryCode: "US",
+
+ MarketSegment: "COM",
+
+ AkamaiURLPrefix: "http://wwwimages.adobe.com/www.adobe.com",
+
+ PriceMonthText: "per month",
+
+ PriceYearText: "per year",
+
+ FullSubMonthText: "Month-to-month",
+
+ FullSubYearText: "One-year",
+
+ SubMonthText: "Monthly",
+
+ SubYearText: "Annual",
+
+ SubscriptionItemText: "NONE",
+
+ TermTypeMonth: "MONTH",
+
+ TermTypeYear: "YEAR",
+
+ BackupDVDParent: "_PARENT",
+ /*
+ params: {
+ cart,
+ price,
+ categoryPath,
+ originalPrice,
+ storeName,
+ locale,
+ usePrecision,
+ type,
+ taxCode,
+ delimiter,
+ showCentDelim,
+ distributionMethod
+ }
+ */
+ getPriceLabel: function(params) {
+ var currency = params.cart.currency;
+ var params = {
+ storeName: params.storeName,
+ locale: params.locale,
+ productKey: params.categoryPath,
+ priceObject: {
+ price: {
+ orginalPriceWithoutTax: params.originalPrice,
+ priceWithoutTax: params.price,
+ taxCode: params.taxCode || ""
+ },
+ priceTypeKey: params.distributionMethod
+ },
+ currencyObject: {
+ delimiter: params.delimiter || ",",
+ formatString: currency.FORMATSTRING,
+ iso3Code: currency.CODE,
+ symbol: currency.SYMBOL,
+ usePrecision: params.usePrecision
+ },
+ showCentDelim : params.showCentDelim || false,
+ type: params.type
+ };
+ return params;
+ },
+
+ isSubscription: function(serviceCommitment, termType) {
+ return (serviceCommitment == this.SubscriptionItemText &&
+ (termType == this.TermTypeMonth || termType == this.TermTypeYear));
+ },
+
+ subscriptionItem: function(serviceCommitment, termType) {
+ return (termType == this.TermTypeMonth &&
+ (serviceCommitment == this.TermTypeMonth || serviceCommitment == this.TermTypeYear));
+ },
+
+ getSubscriptionText: function(serviceCommitment, termType) {
+ if (this.isSubscription(serviceCommitment, termType)) {
+ if (termType === this.TermTypeMonth) {
+ return this.SubMonthText;
+ } else if (termType === this.TermTypeYear) {
+ return this.SubYearText;
+ }
+ } else if (this.subscriptionItem(serviceCommitment, termType)) {
+ if (serviceCommitment === this.TermTypeMonth) {
+ return this.FullSubMonthText;
+ } else if (serviceCommitment === this.TermTypeYear) {
+ return this.FullSubYearText;
+ }
+ }
+ return "";
+ },
+
+ getSubscriptionPriceText: function(serviceCommitment, termType) {
+ if (this.isSubscription(serviceCommitment, termType)) {
+ if (termType === this.TermTypeMonth) {
+ return this.PriceMonthText;
+ } else if (termType === this.TermTypeYear) {
+ return this.PriceYearText;
+ }
+ } else if (this.subscriptionItem(serviceCommitment, termType)) {
+ return this.PriceMonthText;
+ }
+ return "";
+ }
+
+ };
+</script>
+</div>
+<div id="modalContent" style="display:none;"></div>
+</div>
+<!--googleon: all--></div>
+ <div class="Link" id="top">
+ <div class="Link LayoutBreakAfter">
+ <div class="parbase compbase breadcrumb"><div class="LayoutHeader LayoutBreakAfter Link">
+ <div class="LayoutHeaderPath">
+ <div class="LayoutCellSides LinkStrong LayoutH IconAlign">
+ <span class="LayoutHItem LayoutSmallGutterRight">
+ <a href="/devnet.html">
+ Adobe Developer Connection</a>
+ </span>
+ <span class="LayoutSmallGutterRight LayoutHItem">/</span>
+ <span class="LayoutHItem LayoutSmallGutterRight">
+ <a href="/devnet/flex.html">
+ Flex Developer Center</a>
+ </span>
+ <span class="LayoutSmallGutterRight LayoutHItem">/</span>
+ </div>
+ </div>
+</div>
+</div>
+<div class="LayoutGrid-1-3 LayoutSlimGrid-1-2">
+ <h1 class="LayoutCellSides LayoutSmallRow TextH1">
+ Differences between Flex 3 and Flex 4</h1>
+ </div>
+ </div>
+</div>
+<div class="LayoutRow Link RuleH">
+ <div class="LayoutBreakAfter">
+ <!-- Article Leaf -->
+ <div class="ArticleGrid-1 LayoutSlimGrid-1-2 ArticleWideGrid-1 TextSmall">
+ <div class="LayoutCellSides LayoutRow">
+ <div class="articleAuthorDisplay authordisplay"><h2 class="TextH5 LayoutRow">
+ by <a href="/devnet/author_bios/joan_lafferty.html">Joan Lafferty</a></h2>
+ <div class="LayoutRow">
+ <img title="" alt="Joan Lafferty" class="ImageShadow LayoutImage" src="/content/dotcom/en/devnet/author_bios/joan_lafferty/_jcr_content/image.adimg.mw.160.jpg/1370646309692.jpg"/></div>
+ <div class="LayoutRow">
+ <ul>
+ <li><a href="http://butterfliesandbugs.wordpress.com" title="butterfliesandbugs.wordpress.com" target="_blank">butterfliesandbugs.wordpress.com</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="LayoutCellSides LayoutRow">
+ <div class="parbase compbase articleTOC singlepagetoc"><div class="LayoutRow">
+ <h2 class="TextH5 LayoutSmallRow">Content</h2>
+ <ul class="LayoutSmallRow">
+ <li class="LayoutSmallRow ListItemIndent">
+ <a href="#articlecontentAdobe_numberedheader">
+ Migrating applications to Flex 4 </a>
+ </li>
+ <li class="LayoutSmallRow ListItemIndent">
+ <a href="#articlecontentAdobe_numberedheader_0">
+ An overview of Flex 4 architecture changes</a>
+ </li>
+ <li class="LayoutSmallRow ListItemIndent">
+ <a href="#articlecontentAdobe_numberedheader_1">
+ New components and containers</a>
+ </li>
+ <li class="LayoutSmallRow ListItemIndent">
+ <a href="#articlecontentAdobe_numberedheader_2">
+ Changes in effects </a>
+ </li>
+ <li class="LayoutSmallRow ListItemIndent">
+ <a href="#articlecontentAdobe_numberedheader_3">
+ Working with text </a>
+ </li>
+ <li class="LayoutSmallRow ListItemIndent">
+ <a href="#articlecontentAdobe_numberedheader_4">
+ Backwards compatibility with Flex 3</a>
+ </li>
+ </ul>
+ </div>
+
+ </div>
+</div>
+ <div class="LayoutCellSides LayoutRow">
+ <div class="articleTools articletools"><div class="LayoutRow LayoutCellVSides">
+ <h2 class="TextH5 LayoutSmallRow">Modified</h2>
+ <p>4 October 2009</p>
+ </div>
+ <ul class="LayoutRow">
+ </ul>
+ </div>
+</div>
+ <div class="LayoutRow">
+ <div class="articleCommentSummary commentsummary"><div class="LayoutRow LayoutCellSides">
+ <div id="articleRankAndCommentSummary"></div>
+</div>
+</div>
+</div>
+ <div class="LayoutRow">
+ <!-- Page Tools -->
+ <div class="pagetools pageTools"><div class="LayoutBreakAfter">
+ <div class="LayoutRow LayoutBreakAfter TextH5">
+ <table class="LayoutMaxH">
+ <tbody>
+ <tr>
+ <td class="PanelFillDark">
+ <h2 class="TextH5 LayoutCellSides LayoutSmallCellVSides">
+ Page tools</h2>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+</div>
+<div class="LayoutCellSides">
+ <div class="LayoutRow">
+ <div id="PageTools" style="padding-left:23px;" class=" LayoutBreakAfter LayoutPullout">
+ <div class="LayoutSmallRowBottom LayoutBreakAfter">
+ <div style="width:16px;float:left;clear:left;position:relative;left:-23px;margin-right:-23px">
+ <a class="Facebook-button Icon IconFacebook" href="http://www.facebook.com/sharer.php"></a>
+ </div>
+ <div style="float:left;width:100%">
+ <a href="http://www.facebook.com/sharer.php" class="Facebook-button" title="Share on Facebook" target="_blank">Share on Facebook</a></div>
+ </div>
+ <div class="LayoutSmallRowBottom LayoutBreakAfter">
+ <div style="width:16px;float:left;clear:left;position:relative;left:-23px;margin-right:-23px">
+ <a class="Twitter-button Icon IconTwitter" href="http://twitter.com/"></a>
+ </div>
+ <div style="float:left;width:100%">
+ <a href="http://twitter.com/" class="Twitter-button" title="Share on Twitter" target="_blank">Share on Twitter</a></div>
+ </div>
+ <div class="LayoutSmallRowBottom LayoutBreakAfter">
+ <div style="width:16px;float:left;clear:left;position:relative;left:-23px;margin-right:-23px">
+ <a class="LinkedIn-button Icon IconLinkedIn" href="http://www.linkedin.com/"></a>
+ </div>
+ <div style="float:left;width:100%">
+ <a href="http://www.linkedin.com/" class="LinkedIn-button" title="Share on LinkedIn" target="_blank">Share on LinkedIn</a></div>
+ </div>
+ <div class="LayoutSmallRowBottom LayoutBreakAfter">
+ <div style="width:16px;float:left;clear:left;position:relative;left:-23px;margin-right:-23px">
+ <a class="Bookmark-button Icon IconBookmark" href="#"></a>
+ </div>
+ <div style="float:left;width:100%">
+ <a class="Bookmark-button" href="#">Bookmark</a>
+ </div>
+ </div>
+ <div class="LayoutSmallRowBottom LayoutBreakAfter">
+ <div style="width:16px;float:left;clear:left;position:relative;left:-23px;margin-right:-23px">
+ <a class="Print-button Icon IconPrint" href="#"></a>
+ </div>
+ <div style="float:left;width:100%">
+ <a class="Print-button" href="#">Print</a>
+ </div>
+ </div>
+ </div>
+</div>
+ </div>
+ </div>
+</div>
+</div>
+ <div class="LayoutCellSides LayoutRow">
+ <!-- Article Community -->
+ <div class="articletags articleTags"><div class="LayoutRow">
+ <div class="LayoutH LinkWeak TextTag">
+ <a href="/devnet/tagsearch.tsb.tag-ADC%2BKeywords_c_architecture.tse.html" class="LayoutHItem LayoutHItem PanelFillMedium LayoutSmallGutterRight LayoutSmallRow LayoutSmallCellSides" title="architecture">architecture</a><a href="/devnet/tagsearch.tsb.tag-ADC%2BKeywords_c_effects.tse.html" class="LayoutHItem LayoutHItem PanelFillMedium LayoutSmallGutterRight LayoutSmallRow LayoutSmallCellSides" title="effects">effects</a><a href="/devnet/tagsearch.tsb.prod-_sl_flex_v_.tse.html" class="LayoutHItem LayoutHItem PanelFillMedium LayoutSmallGutterRight LayoutSmallRow LayoutSmallCellSides" title="Flex">Flex</a><a href="/devnet/tagsearch.tsb.tag-ADC%2BKeywords_c_migration.tse.html" class="LayoutHItem LayoutHItem PanelFillMedium LayoutSmallGutterRight LayoutSmallRow LayoutSmallCellSides" title="migration">migration</a><a href="/devnet/tagsearch.tsb.tag-ADC%2BKeywords_c_spark_components.tse.html" class="LayoutHItem LayoutHItem PanelFillMedium LayoutSmallGutterRight LayoutSmallRo
w LayoutSmallCellSides" title="Spark">Spark</a><a href="/devnet/tagsearch.tsb.tag-ADC%2BKeywords_c_states.tse.html" class="LayoutHItem LayoutHItem PanelFillMedium LayoutSmallGutterRight LayoutSmallRow LayoutSmallCellSides" title="states">states</a></div>
+ </div>
+ </div>
+</div>
+ <div class="LayoutCellSides LayoutRow">
+ <div class="parbase adcFeedBack compbase adcfeedback"><script type="javascript">
+ //<![CDATA[
+ s_tagEnv = 'dev';
+ //]]>
+ </script>
+ <script src="http://wwwimages.adobe.com/www.adobe.com/include/script/article-compressed.js"></script>
+
+ <div id="helpful-pod">
+ <div id="helpful" class="collapsed">
+ <div id="helpfulspan">Was this helpful?</div>
+ <input type="radio" name="feedback" id="radioyes" onClick="showForm();"/><span id="yesspan" class="radio-option">Yes</span>  
+ <input type="radio" name="feedback" id="radiono" onClick="showForm();"/><span id="nospan" class="radio-option">No</span>
+ <textarea title="(Optional) Please let us know how we can improve this page. " id="feedbacktext" placeholder="" rows="5" cols="25" style="font-family:sans-serif;display:none"></textarea>
+ <button id="submitButton" onClick="submitForm();" style="display:none">Submit</button>
+ <button id="noCommentButton" onClick="hideForm();" style="display:none">No comment</button>
+ <br clear="both">
+ <div id="termsofuse"><p>By clicking Submit, you accept the <a href="/misc/terms.html">Adobe Terms of Use</a>.</p>
+</div>
+ </div>
+ <div id="fold"> </div>
+ </div>
+ <div id="helpful-thankyou" class="thankyou">Thanks for your feedback.</div>
+
+ <script>
+ //<![CDATA[
+ // Send CHL-specific data to SiteCatalyst
+ var s_chl = s_gi("mxchlprod");
+ var urlMatch = /(https?:\/\/)([-\w\.]+)+(:\d+)?(\/([\w\/_\.]*))(index.html)?(\?\S+)?(#\S+)?/;
+ var adobeMatch = /(https?:\/\/)([-\w\.]+)+(\.adobe\.com)/;
+ var adobeLocaleMatch = /^\/(ae|bg|cz|dk|de|gr|es|ee|fi|fr|il|hr|hu|it|jp|kr|lt|lv|no|nl|pl|br|ro|ru|sk|si|se|tr|ua|cn|tw)\/.+/;
+ var cqLocaleMatch = /^\/content\/help\/(ae|bg|cz|dk|de|gr|es|ee|fi|fr|il|hr|hu|it|jp|kr|lt|lv|no|nl|pl|br|ro|ru|sk|si|se|tr|ua|cn|tw)\/.+/;
+ var ua = navigator.userAgent.toLowerCase();
+ s_chl.channel = "helpx";
+ s_chl.eVar3 = window.location.toString().replace(/[\?,#](.*)/, "");
+ s_chl.pageName = s_chl.eVar11 = document.title;
+ if ( typeof(omtrPageName) != 'undefined' && omtrPageName.length > 0 ) {
+ s_chl.pageName = s_chl.eVar11 = omtrPageName;
+ }
+ // s_chl.list1 = omtrProductList.replace(/,/g,":");
+ var omtrLocale = "en";
+ if (adobeLocaleMatch.test(location.pathname)) {
+ var matchArray = adobeLocaleMatch.exec(location.pathname).slice();
+ omtrLocale = matchArray[1];
+ if ( typeof(matchArray[1]) != 'undefined') {
+ omtrLocale = matchArray[1];
+ }
+ }
+ else if (cqLocaleMatch.test(location.pathname)) {
+ var matchArray = cqLocaleMatch.exec(location.pathname).slice();
+ omtrLocale = matchArray[1];
+ if ( typeof(matchArray[1]) != 'undefined') {
+ omtrLocale = matchArray[1];
+ }
+ }
+
+ s_chl.eVar8 = omtrLocale;
+ if (omtrLocale != "en") {
+ s_chl.eVar9 = document.title;
+ }
+ // Transmit
+ // The s_gs() call in compressed.js causes problems with any .t() call in any report suite
+ function s_gs(){}
+ s_chl.t();
+
+ function showForm(){
+ if (ua.indexOf('msie 6') == -1 ){
+ $('#helpfulspan').hide();
+ $('#radioyes').hide();
+ $('#radiono').hide();
+ $('#yesspan').hide();
+ $('#nospan').hide();
+ $('#feedbacktext').autofill();
+ $('#helpful').animate({width:'420px', height: '185px'});
+ $('#helpful').removeClass('collapsed');
+ $('#helpful').addClass('expanded');
+ $('#fold').css('background-position', '-12px 0');
+ displayTextField();
+ }else{
+ submitForm();
+ }
+ }
+
+
+
+ $(document).ready(function() {
+ var feedbackLocales = "en, jp, fr, de, it, se, es, nl , dk, br, no, fi";
+ if ( feedbackLocales.indexOf( omtrLocale ) > -1 ){
+ $('#helpful-pod').fadeIn();
+ $('#helpful-pod').animate({
+ opacity: 1,
+ top: '+=20'},
+ 1500);
+ }
+ });
+
+ // ]]>
+ </script>
+ </div>
+</div>
+ <div class="LayoutBreak"></div>
+ </div>
+ <!-- Main Content -->
+ <div class="LayoutSlimGrid-1-2 ArticleGrid-2-4 ArticleWideGrid-2-6">
+ <div class="ArticleWideGrid-2-4">
+ <div class="articlerequirements articlePrerequistes"><div class="PanelFillMedium PanelBorder LayoutRow TextSmall">
+ <div id="requirements-title" class="LayoutCell Link">
+ <h2 class="TextH5">
+ <span class="LayoutSmallGutterRight Icon IconSmallerAdd"></span>
+ Requirements</h2>
+ </div>
+ <div id="requirements-content" class="LayoutBreakAfter">
+ <div class="ArticleGrid-2">
+ <div class="LayoutCellSides">
+ <h3 class="TextH5 LayoutSmallRowTop">
+ Prerequisite knowledge</h3>
+ <div class="LayoutRowBottom">
+ <p>This article assumes knowledge of the Flex 3 Framework.</p>
+</div>
+ <h3 class="TextH5 LayoutSmallRowTop">
+ User level</h3>
+ <p class="LayoutRowBottom">Intermediate</p>
+ </div>
+ </div>
+ <div class="ArticleGrid-3">
+ <div class="LayoutCellSides">
+ <h3 class="TextH5 LayoutSmallRowTop">
+ Required products</h3>
+ <ul class="LayoutSmallRowTop LayoutRowBottom">
+ <li class="LayoutSmallRow">
+ <span class="IconLeft IconSmallDownload"></span>Flex 4<a href="/go/tryflex/"> (Download trial)</a></li>
+ </ul>
+ </div>
+ </div>
+ </div>
+ </div>
+ <script>
+ adobe.fn.panelToggle("requirements-title", "requirements-content", true);
+</script>
+<script>
+ adobe.fn.panelToggle("requirements-title", "requirements-content", true);
+</script>
+</div>
+<div class="LayoutGrid-1-4 LayoutSlimGrid-1-2 LayoutBreakAfter">
+ <div class="parsys articlecontentAdobe"><div id="articlecontentAdobe">
+<a name="articlecontentAdobe_text" style="visibility:hidden"></a><div class="text parbase section"><div class="Semantic LayoutCellSides LayoutBreakAfter TextMedium TextBreak">
+ <p>The Flex 4 release is a major change from Flex 3. Flex 4 introduces a new component and skinning architecture. As a Flex 3 developer, however, you will likely not encounter too many challenges when compiling Flex 3 applications with Flex 4 , since a goal of the new release is to maintain backwards compatibility with Flex 3.</p>
+<p>In this article, I will provide a general overview of the main objectives in Flex 4, architecture differences, and an introduction to changes in components, layouts, use of states, and effects. I'll also answer some questions regarding what to expect when you compile your Flex 3 application in Flex 4. This article will not cover all of the new features and functionality in Flex 4. For that information, read the article <a href="/devnet/flex/articles/flex4sdk_whatsnew.html">What's new in Flex 4</a>.</p>
+<p>Throughout this document, the term MX components refers to components originally included in Flex 3. The term Spark components refers to the new set of components in Flex 4.</p>
+</div>
+ </div>
+<a name="articlecontentAdobe_numberedheader" style="visibility:hidden"></a><div class="parbase compbase numberedheader section"><h3 class="TextH3 LayoutCellSides LayoutRow">
+ <a id="articlecontentAdobe_numberedheader"></a>
+ Migrating applications to Flex 4 </h3>
+</div>
+<a name="articlecontentAdobe_text_0" style="visibility:hidden"></a><div class="text parbase section"><div class="Semantic LayoutCellSides LayoutBreakAfter TextMedium TextBreak">
+ <p>When migrating Flex 3 applications to Flex 4, you should not expect to do very much work. Other than bug fixes and a change in the default theme, you can look forward to your application generally working the same (or better) than it did in Flex 3. However, there are a few things to watch out for.</p>
+<h4>Player dependency</h4>
+<p>Be sure that you compile against Flash Player 10. The Flex 4 SDK requires Flash Player 10 support.</p>
+<h4>Type selectors require a namespace</h4>
+<p>A CSS type selector names the Flex class to style. For example, the following are type selectors for Button and DateField:</p>
+</div>
+ </div>
+<a name="articlecontentAdobe_codeblock" style="visibility:hidden"></a><div class="parbase codeblock compbase section"><div class="PanelFillLight PanelBevelTop LayoutCell LayoutRow">
+ <code class="CodeBlock">Button {
+ cornerRadius: 10;
+}
+DateField {
+ color: #780800;
+}</code>
+ </div>
+</div>
+<a name="articlecontentAdobe_text_1" style="visibility:hidden"></a><div class="text parbase section"><div class="Semantic LayoutCellSides LayoutBreakAfter TextMedium TextBreak">
+ <p>As of the Flex 4 SDK, when an application uses type selectors, a namespace is required. If you are using only the MXML 2006 namespace in your Flex Application, add the following default namespace declaration to your CSS:</p>
+</div>
+ </div>
+<a name="articlecontentAdobe_codeblock_0" style="visibility:hidden"></a><div class="parbase codeblock compbase section"><div class="PanelFillLight PanelBevelTop LayoutCell LayoutRow">
+ <code class="CodeBlock"><mx:Style>
+
+@namespace "http://www.adobe.com/2006/mxml";
+…
+</mx:Style></code>
+ </div>
+</div>
+<a name="articlecontentAdobe_text_2" style="visibility:hidden"></a><div class="text parbase section"><div class="Semantic LayoutCellSides LayoutBreakAfter TextMedium TextBreak">
+ <p>If you are using multiple namespaces in your application, then you will need to provide each of the namespaces in your CSS. For an example, see <a href="/devnet/flex/articles/flex3and4_differences.html#_Namespaces_and_packages">Namespaces and packages in Flex 4</a> later in this article.</p>
+<p>Further, if an application used a method like StyleManager.getStyleDeclaration("Button"), the type selector will need to include its package. For example, the call to getStyleDeclaration() would change to StyleManager.getStyleDeclaration("mx.controls.Button").</p>
+<h4>Theme change</h4>
+<p>The default theme for Flex 3 (MX) components is now the Spark theme. Therefore, your application may look and size itself differently when you compile it using the Flex 4 SDK. If, however, you want to use the Flex 3 look you still can because Flex 4 includes the Halo theme from Flex 3. To compile using the Halo theme, you can use the additional compiler argument -compatibility-version=3.0. In Flash Builder 4, you can do this in the Properties Panel. In the Properties Panel, select, Flex Compiler and click the checkbox for “Use Flex 3 compatibility mode" (see Figure 1).</p>
+</div>
+ </div>
+<a name="articlecontentAdobe_image" style="visibility:hidden"></a><div class="parbase image section"><div class="LayoutRow LayoutCellSides">
+ <img title="Using Flex 3 Compatibility Mode " alt="Using Flex 3 Compatibility Mode " class="cq-dd-image LayoutImage LayoutRow " src="/content/dotcom/en/devnet/flex/articles/flex3and4_differences/_jcr_content/articlecontentAdobe/image.adimg.mw.487.jpg/1279863739555.jpg"/></div>
+<div class="TextSmall LayoutCellSides LayoutRowTop LayoutBigRowBottom">
+ Figure 1. Using Flex 3 Compatibility Mode </div>
+</div>
+<a name="articlecontentAdobe_text_3" style="visibility:hidden"></a><div class="text parbase section"><div class="Semantic LayoutCellSides LayoutBreakAfter TextMedium TextBreak">
+ <p>Alternatively, the theme can be changed from the default Spark theme to Halo in the Properties -> Flex Theme panel. In the “Flex Theme” panel, click on the Halo theme (see Figure 2).</p>
+</div>
+ </div>
+<a name="articlecontentAdobe_image_0" style="visibility:hidden"></a><div class="parbase image section"><div class="LayoutRow LayoutCellSides">
+ <img title="Selecting the Halo Theme in the Properties Panel " alt="Selecting the Halo Theme in the Properties Panel " class="cq-dd-image LayoutImage LayoutRow " src="/content/dotcom/en/devnet/flex/articles/flex3and4_differences/_jcr_content/articlecontentAdobe/image_0.adimg.mw.680.jpg/1279863786889.jpg"/></div>
+<div class="TextSmall LayoutCellSides LayoutRowTop LayoutBigRowBottom">
+ Figure 2. Selecting the Halo Theme in the Properties Panel </div>
+</div>
+<a name="articlecontentAdobe_text_4" style="visibility:hidden"></a><div class="text parbase section"><div class="Semantic LayoutCellSides LayoutBreakAfter TextMedium TextBreak">
+ <p>If you do choose to use the new Spark theme, note that many of the styles that worked with the Halo theme do not work in the Spark theme. The Spark theme only supports a limited number of styles. To understand which styles are available for the Spark skin, you should reference the ASDoc. For each style listed per component, a "Theme" will be designated. If no theme is designated, then, the style is available for both the Halo and Spark theme. Flex 4 has also added a Wireframe skin that was designed to be used for quick mock-ups. The wireframe theme does not support style changes.</p>
+ <p>In addition to the theme change, the default preloader has changed to the mx.preloaders.SparkDownloadProgressBar for Flex 4 applications. This lighter weight preloader should shorten start-up time a little. If you want to use the Flex 3 preloader, you only need to change one line of code. In your <code>Application</code> tag add the following: <code>preloader="mx.preloaders.DownloadProgressBar"</code>.</p>
+ <p>If you are migrating an application from Flex 3 to Flex 4 , I do not recommend that you replace each of your Flex 3 MX components with their corresponding Flex 4 components. This is probably not a good investment of your time. Instead, move to the Flex 4 component architecture for new applications. </p>
+ <h4>Automation Library location change</h4>
+ <p>In Flex 3, automation libraries were present under {sdk}/frameworks/libs and in the Flex 4 , it is available under {sdk}/frameworks/libs/automation. Users should ensure that they don’t have a copy of automation libraries under the frameworks/libs. </p>
+</div>
+ </div>
+<a name="articlecontentAdobe_numberedheader_0" style="visibility:hidden"></a><div class="parbase compbase numberedheader section"><h3 class="TextH3 LayoutCellSides LayoutRow">
+ <a id="articlecontentAdobe_numberedheader_0"></a>
+ An overview of Flex 4 architecture changes</h3>
+</div>
+<a name="articlecontentAdobe_text_5" style="visibility:hidden"></a><div class="text parbase section"><div class="Semantic LayoutCellSides LayoutBreakAfter TextMedium TextBreak">
+ <p>One of the major themes in the Flex 4 SDK is "Design in Mind". This goal involves creating a smoother workflow between designers and developers. To help achieve this, the framework provides a clear separation of the visuals for a component and the rest of its behavior. In Flex 3, an individual component's code included logic around its behavior, layout, and visual changes. In Flex 4, the components are factored out into different classes, each handling specific pieces of behavior.</p>
+<p>As specified in the <a target="_blank" href="http://opensource.adobe.com/wiki/display/flexsdk/Gumbo+Component+Architecture">Gumbo Architecture Document</a>:</p>
+<p>"The main component class, the one whose class name matches the component's MXML tag name, encapsulates the core behavior of the component. This includes defining what events the component dispatches, the data that component represents, wiring up any sub-components that act as parts of the main component, and managing and tracking internal component state (we discuss states in more detail below).</p>
+<p>Coupled with that component class is a skin class which manages everything related to the visual appearance of the component, including graphics, layout, representing data, changing appearance in different states, and transitioning from state to state. In the Halo model, Flex component skins were assets responsible for only one part of the graphics of a component. Changing any other aspect of a component's appearance, like layout or visualization of states, required sub-classing the component and editing the ActionScript code directly. In the Gumbo model, all of this is defined declaratively in the skin class, primarily through new graphics tags called FXG tags."</p>
+<p>To learn more about the new graphics tags in Flex 4, you can read the <a href="http://help.adobe.com/en_US/Flex/4.0/UsingSDK/WS145DAB0B-A958-423f-8A01-12B679BA0CC7.html">FXG documentation</a>.</p>
+<p>As an example of the architecture discussed above, you can look at the code for the spark.components.Button class. This class only contains logic around the component's behavior. All of the visuals for this component are defined in the skin class spark.skins.spark.ButtonSkin</p>
+<p>For performance reasons, the Flex 4 SDK has provided building blocks for developers to pick and choose the functionality that you need. Heavyweight functionality such as scrolling and virtualization that is not needed by all applications is not turned on by default.</p>
+<h4><a name="_Namespaces_and_packages"></a>Namespaces and packages in Flex 4</h4>
+<p>While keeping Flex 3 classes intact in the same mx.* packages, the Flex 4 SDK introduces the spark.* packages for components, core classes, effects, filters, layouts, primitives, skins, and utils.</p>
+<p>The Flex 4 SDK provides a new set of components and effects that share many of the same class names as Flex 3 components. To avoid name collisions in MXML, the Flex 4 SDK comes with four distinct namespaces: MXML 2006, MXML 2009, Spark, and Mx.</p>
+<p><b>MXML 2006:</b> The legacy MXML language namespace used in previous versions of Flex. Flex 3 applications compiled using Flex 4 can continue using this namespace.</p>
+<p>URI: http://www.adobe.com/2006/mxml</p>
+<p>Default Prefix: mx</p>
+<p><b>MXML 2009:</b> The new MXML language namespace. This is purely a language namespace, and does <i>not</i> contain component tags.</p>
+<p>URI: http://ns.adobe.com/mxml/2009<br>
+ Default Prefix: fx</p>
+<p><b>Spark:</b> This namespace includes all of the new Spark components. It should be used in conjunction with the MXML 2009 language namespace.</p>
+<p>URI: library://ns.adobe.com/flex/spark<br>
+ Default Prefix: s</p>
+<p><b>MX:</b> This namespace includes all of the MX components. It should be used in conjunction with the MXML 2009 language namespace.</p>
+<p>URI: library://ns.adobe.com/fl
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