jmclean/validators/src/PostCodeValidationExample.mxml

<?xml version="1.0" encoding="utf-8"?>
<s:Application 
    width="100%"
    xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:s="library://ns.adobe.com/flex/spark"
    xmlns:mx="library://ns.adobe.com/flex/mx"
	xmlns:a="http://flex.apache.org/ns">
    <s:layout>
        <s:VerticalLayout 
            paddingLeft="20"
            paddingTop="20"
            gap="10"/>
    </s:layout>

    <fx:Declarations>
        <a:PostCodeValidator id="pcv"
            source="{postcode}"
            formats="{postCodeFormats}"
            property="text"/>
        <a:PostCodeFormatter id="pcf"
            formats="{postCodeFormats}"/>
    </fx:Declarations>

    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayList;
            import mx.events.ValidationResultEvent;
            import mx.validators.ValidationResult;

            [Bindable]
            protected var postCodeFormats:Array = [ "AA-NNNN" ];

            [Bindable]
            protected var countries:ArrayList =
                new ArrayList([{ country: "Australia", locale: "en_AU" },
                                 { country: "Canada", locale: "en_CA" },
                                 { country: "United Kingdom", locale: "en_GB" },
                                 { country: "United States", locale: "en_US" },
								 { country:"Portugal", locale:"pt_PT" }]);

            protected function validate(event:Event):void
            {
                var result:ValidationResultEvent = pcv.validate();

                errors.dataProvider = new ArrayList(result.results);

                formatted.text = pcf.format(postcode.text);
            }

            protected function displayError(data:Object):String
            {
                var error:ValidationResult = data as ValidationResult;

                if (error)
                    return error.errorCode + ": " + error.errorMessage;

                return "";
            }

            protected function changeCountry(event:Event):void
            {
                postCodeFormats = pcv.suggestFormat(country.selectedItem.locale);
                validate(event);
            }
        ]]>
    </fx:Script>

    <s:Form>
        <s:FormItem label="Select Country">
            <s:List id="country"
                dataProvider="{countries}"
                labelField="country"
                change="changeCountry(event)"/>
        </s:FormItem>
        <s:FormItem label="Enter Format">
            <s:TextInput id="format"
                text="{postCodeFormats.toString()}"
                change="postCodeFormats = [format.text.split()]"
                restrict="AN -"/>
        </s:FormItem>
        <s:FormItem label="Enter Postcode">
            <s:TextInput id="postcode"
                change="validate(event)"/>
        </s:FormItem>
        <s:FormItem label="Formatted Postcode">
            <s:Label id="formatted"/>
        </s:FormItem>
        <s:FormItem label="Errors">
            <s:List id="errors"
                labelFunction="displayError"/>
        </s:FormItem>
    </s:Form>

</s:Application>