Rich Internet Applications and Flex - 5

Rich Internet Applications and Flex Vijay Kalangi

• Breaking the Application into components• UIComponent on top • Extended from other classes which provide event dispatching, containment of other objects.

Class Hierarchy for display component

• Easy to build, debug and maintain• Ease team development• Suite of reusable code• Loose coupling - data in and out needs to be speciﬁed !

• Components for dataloading

• using lists • labelfunction private function multiDisplay(item:Object):String{ return item.category+”: “+item.name+” $”+item.cost; }

• using datagroups <s:Application xmlns:fx=”http://ns.adobe.com/mxml/ 2009” xmlns:s=”library://ns.adobe.com/ﬂex/spark” > <s:DataGroup itemRenderer=”spark.skins.spark.DefaultItemRenderer” > <s:dataProvider> <s:ArrayList> <fx:String>Jeff Tapper</fx:String> <fx:String>Mike Labriola</fx:String> <fx:String>Matt Boles</fx:String> <fx:String>Simeon Bateman</fx:String> • </s:ArrayList> </s:dataProvider> <s:layout> <s:VerticalLayout/> </s:layout> </s:DataGroup>

• Your own itemrenderer • Should extend IDataRenderer or subclass that already extends IDataRenderer interface • get and set methods for data •

• Virtualization • Create only what you need • Recycle! • implementing virtualization

• List of meta tags - URL

Rich Internet Applications and Flex - 5

by Vijay Kalangi

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