The following example shows how you can create an MXML-based icon for the Halo/MX LinkButton control in Flex 4 by creating a custom component using the <fx:Component/> tag and setting the className property.
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 beta, check out the Adobe Flash Builder 4 page on the Adobe Labs site. To download the latest build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4. For instructions on using the beta Flex 4 SDK in Flex Builder 3, see "Using the beta Flex 4 SDK in Flex Builder 3".
<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2009/10/29/creating-an-mxml-based-icon-for-the-halo-linkbutton-control-in-flex-4/ --> <s:Application name="Halo_LinkButton_icon_test" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo"> <fx:Declarations> <fx:Component className="ico"> <s:Graphic> <s:states> <s:State name="up" /> <s:State name="over" /> <s:State name="down" /> </s:states> <s:Ellipse width="8" height="8"> <s:fill> <s:SolidColor color="red" color.over="green" color.down="blue" /> </s:fill> </s:Ellipse> </s:Graphic> </fx:Component> </fx:Declarations> <mx:LinkButton id="lnkBtn" label="Halo LinkButton" icon="ico" horizontalCenter="0" verticalCenter="0" /> </s:Application>
You can also set the icon style in an external .CSS file or <Style/> block, as seen in the following example:
<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2009/10/29/creating-an-mxml-based-icon-for-the-halo-linkbutton-control-in-flex-4/ --> <s:Application name="Halo_LinkButton_icon_test" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo"> <fx:Style> @namespace s "library://ns.adobe.com/flex/spark"; @namespace mx "library://ns.adobe.com/flex/halo"; mx|LinkButton { icon: ClassReference("ico"); } </fx:Style> <fx:Declarations> <fx:Component className="ico"> <s:Graphic> <s:states> <s:State name="up" /> <s:State name="over" /> <s:State name="down" /> </s:states> <s:Ellipse width="8" height="8"> <s:fill> <s:SolidColor color="red" color.over="green" color.down="blue" /> </s:fill> </s:Ellipse> </s:Graphic> </fx:Component> </fx:Declarations> <mx:LinkButton id="lnkBtn" label="Halo LinkButton" horizontalCenter="0" verticalCenter="0" /> </s:Application>
Or you can set the icon style using ActionScript, as seen in the following example:
<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2009/10/29/creating-an-mxml-based-icon-for-the-halo-linkbutton-control-in-flex-4/ --> <s:Application name="Halo_LinkButton_icon_test" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo"> <s:controlBarContent> <s:Button id="btn" label="Set icon" click="btn_clickHandler(event);" /> </s:controlBarContent> <fx:Script> <![CDATA[ protected function btn_clickHandler(evt:MouseEvent):void { lnkBtn.setStyle("icon", ico); } ]]> </fx:Script> <fx:Declarations> <fx:Component className="ico"> <s:Graphic> <s:states> <s:State name="up" /> <s:State name="over" /> <s:State name="down" /> </s:states> <s:Ellipse width="8" height="8"> <s:fill> <s:SolidColor color="red" color.over="green" color.down="blue" /> </s:fill> </s:Ellipse> </s:Graphic> </fx:Component> </fx:Declarations> <mx:LinkButton id="lnkBtn" label="Halo LinkButton" horizontalCenter="0" verticalCenter="0" /> </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.
