Macromedia flex 2 Manuale

About MXML components

81

Creating composite MXML components

A composite MXML component is a component that contains multiple component 
definitions within it. To create a composite component, you specify a container as its root tag, 
and then add Flex components as children of the container. 

For example, the following component contains an address form created by specifying a 

Form

 

container as the root tag of the component, and then defining several children of the Form 
container. One of the 

<mx:FormItem>

 tags contains a reference to the 

<MyComp:StateComboBox>

 tag that you created in 

: 

<?xml version="1.0"?>
<!-- mxml/AddressForm.mxml -->

<mx:Form xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:MyComp="*">

    <mx:FormItem label="NameField">
        <mx:TextInput/>
    </mx:FormItem>

    <mx:FormItem label="Street">
        <mx:TextInput/>
    </mx:FormItem>

    <mx:FormItem label="City" > 
        <mx:TextInput/>
    </mx:FormItem>

    <mx:FormItem label="State" > 
        <MyComp:StateComboBox/>
    </mx:FormItem>

</mx:Form>

The following application file references the AddressForm component in the 

<AddressForm>

 

tag:

<?xml version="1.0"?>
<!-- mxml/MyApplicationAddressForm.mxml-->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"  
    xmlns:MyComp="*" >

    <MyComp:AddressForm/> 

</mx:Application>