<fx:Reparent> tag implemented by the compiler

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You use the <fx:Reparent> tag to change the parent container of a component as part of a change of view state.

MXML Syntax

You can place an <fx:Reparent> tag in a Flex application file, or in an MXML component file. You can use the <fx:Reparent> tag in any parent component that can hold a child component, and the child can use the includeIn or excludeFrom keywords. The <fx:Reparent> tag has the following syntax:

    <fx:Reparent target="targetComp" includeIn="stateName">

where target specifies the target component, and includeIn specifies a view state. When the current view state is set to stateName, the target component becomes a child of the parent component of the <fx:Reparent> tag.

The following example uses the <fx:Reparent> tag to switch a Button control between two VBox containers in an HDividedBox container:

    <?xml version="1.0" encoding="utf-8"?> 
    <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
        xmlns:mx="library://ns.adobe.com/flex/halo" 
        xmlns:s="library://ns.adobe.com/flex/spark""> 
        <s:layout> 
            <s:VerticalLayout/> 
        </s:layout> 
        
        <s:states> 
            <s:State name="Parent1"/> 
            <s:State name="Parent2"/> 
        </s:states> 
        
        <mx:HDividedBox height="25%" width="100%" borderStyle="inset"> 
            <mx:VBox id="VB1" height="100%" width="100%" borderStyle="inset"> 
                <mx:Label text="VB1"/> 
                <mx:Button id="setCB" includeIn="Parent1"/>        
            </VBox> 
            <mx:VBox id="VB2" height="100%" width="100%" borderStyle="inset"> 
                <mx:Label text="VB2"/> 
                <fx:Reparent target="setCB" includeIn="Parent2"/> 
            </VBox>     
        </mx:HDividedBox> 
     
        <s:Group> 
            <s:layout> 
                <s:HorizontalLayout/> 
            </s:layout> 
            <s:Button label="Parent 1" 
                click="currentState='Parent1'" 
                enabled.Parent1="false"/> 
            <s:Button label="Parent 2" 
                click="currentState='Parent2'" 
                enabled.Parent2="false"/> 
        </s:Group> 
    </s:Application>

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Sat Oct 3 2009, 04:30 AM -07:00