a grand renaming so that the most significant portion of the name comes first

flex-practice/03f1-custom-components/MainForm.mxml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
+    backgroundColor="#FFFFFF"
+    backgroundAlpha="0"
+    xmlns:me="com.mycustom.components.*">
+
+    <mx:Form>
+             <mx:FormItem label="Email Address:" >
+        <me:TextInputEmail />
+             </mx:FormItem>
+             <mx:FormItem>
+        <mx:Button label="Submit" />
+             </mx:FormItem>
+    </mx:Form>
+
+</mx:Application>

flex-practice/03f1-custom-components/com/mycustom/components/TextInputEmail.as

@@ -0,0 +1,35 @@
+package com.mycustom.components
+{
+    import mx.controls.TextInput;
+    import mx.events.ValidationResultEvent;
+    import mx.validators.EmailValidator;
+    import flash.events.Event;
+    import mx.validators.ValidationResult;
+
+    public class TextInputEmail extends TextInput
+    {
+        private var emailValidator:EmailValidator = new EmailValidator();
+        private var validator:ValidationResultEvent;
+
+        public function TextInputEmail()
+        {
+            super();
+            this.emailValidator.source = this;
+            this.emailValidator.property = "text";
+            this.addEventListener("enter", this.validate);
+
+        }
+
+        private function validate(event:Event):void
+        {
+            validator = emailValidator.validate();
+
+            if (validator.type == ValidationResultEvent.VALID)
+            {
+                this.errorString = "";
+            } else {
+                this.errorString = validator.message;
+            }
+        }
+    }
+}