Flex Examples
In a previous example, “Creating a custom component using the Component tag in Flex 4″, we saw how you could create a simple, inline custom component in Flex 4 using the Component tag and className property and then instantiating new instances using ActionScript and MXML.
The following example shows how you can create a new custom component using the Definition tag in Flex 4.
Full code after the jump.
The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 trial, see http://www.adobe.com/products/flex/. To download the latest nightly build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4.
For more information on getting started with Flex 4 and Flash Builder 4, see the official Adobe Flex Team blog.
<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2009/11/06/creating-a-custom-component-using-the-definition-tag-in-flex-4/ --> <s:Application name="Spark_Definition_name_test" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:local="*"> <fx:Library> <fx:Definition name="FancyCircle"> <s:Ellipse> <s:stroke> <s:SolidColorStroke /> </s:stroke> </s:Ellipse> </fx:Definition> </fx:Library> <s:Panel id="pnl" horizontalCenter="0" verticalCenter="0"> <s:Scroller verticalScrollPolicy="on"> <s:Group id="gr"> <s:layout> <s:TileLayout requestedColumnCount="4" requestedRowCount="3" columnWidth="100" rowHeight="100" /> </s:layout> <fx:FancyCircle> <fx:fill> <s:SolidColor color="red" /> </fx:fill> </fx:FancyCircle> <fx:FancyCircle> <fx:fill> <s:SolidColor color="haloOrange" /> </fx:fill> </fx:FancyCircle> <fx:FancyCircle> <fx:fill> <s:SolidColor color="yellow" /> </fx:fill> </fx:FancyCircle> <fx:FancyCircle> <fx:fill> <s:SolidColor color="haloGreen" /> </fx:fill> </fx:FancyCircle> <fx:FancyCircle> <fx:fill> <s:SolidColor color="haloBlue" /> </fx:fill> </fx:FancyCircle> </s:Group> </s:Scroller> </s:Panel> </s:Application>
This entry is based on a beta version of the Flex 4 SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex 4 SDK.
Peter deHaan
Peter deHaan currently works for Adobe on the Flex SDK QA team. While not working on Flex, Flash, and ColdFusion applications, Peter enjoys making up bios and writing in 3rd person. Peter's rarely updated blog can be found at blogs.adobe.com/pdehaan/, actionscriptexamples.com, airexamples.com, and coldfusionexamples.com.
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