www.mikescher.com/demos/phonebook/flex/phonebook.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
	backgroundColor="white"
	backgroundGradientAlphas="0"
	backgroundGradientColors="0" 
	layout="vertical" creationComplete="initApp()">
	<mx:states>
		<mx:State name="grid">
			<mx:RemoveChild target="{loginForm}"/>
			<mx:AddChild relativeTo="{panel1}" position="lastChild">
				<mx:HBox id="hbox1">
					<mx:DataGrid id="contactList" dataProvider="{ws.getContacts.lastResult}" width="350" click="currentState='details'">
						<mx:columns>
							<mx:DataGridColumn headerText="Name" width="175" dataField="name"/>
							<mx:DataGridColumn headerText="Phone" dataField="phone"/>
						</mx:columns>
					</mx:DataGrid>
				</mx:HBox>
			</mx:AddChild>
			<mx:SetProperty target="{newButton}" name="visible" value="true"/>
			<mx:SetProperty target="{deleteButton}" name="visible" value="true"/>
			<mx:SetProperty target="{controlbar1}" name="height"/>
		</mx:State>	
		<mx:State name="details" basedOn="grid">
			<mx:AddChild relativeTo="{hbox1}" position="lastChild">
				<mx:Form>
					<mx:FormItem label="Name:">
						<mx:TextInput id="nameEdit" text="{contactList.selectedItem.name}"/>
					</mx:FormItem>
					<mx:FormItem label="Phone:">
						<mx:TextInput id="phoneEdit" text="{contactList.selectedItem.phone}" />
						<mx:Button id="saveButton" label="Save" click="doSave()" />
					</mx:FormItem>
				</mx:Form>
			</mx:AddChild>
		</mx:State>
	</mx:states>
	
	<mx:PhoneNumberValidator id="val1" source="{phoneEdit}" property="text" />
	<mx:StringValidator id="val2" source="{nameEdit}" property="text" minLength="3" maxLength="20" />
	<mx:Validator id="val3" source="{usernameEdit}" property="text" />
	<mx:Validator id="val4" source="{passwordEdit}" property="text" />
	
	<mx:WebService id="ws" fault="dataError(event)">
		<mx:operation name="saveContact" result="ws.getContacts()" />
		<mx:operation name="deleteContact" result="ws.getContacts()" />
		<mx:operation name="login" result="loginReturned(event)" />		
	</mx:WebService>
 
	<mx:Script>
		<![CDATA[
			import mx.rpc.events.ResultEvent;
			import mx.validators.Validator;
			import mx.controls.Alert;
			import mx.rpc.events.FaultEvent;
			
			private function initApp():void
			{
				ws.loadWSDL(application.parameters.wsdl);
			}
			
			private function dataError(event:FaultEvent):void
			{
				Alert.show(event.fault.faultString,"Data Communication Error");
			}

			private function doSave():void
			{
				if(Validator.validateAll([val1, val2]).length == 0)
				{
					var data:Object = new Object;
					data.id = contactList.selectedItem != null ? contactList.selectedItem.id : -1;
					data.name = nameEdit.text;
					data.phone = phoneEdit.text;
					ws.saveContact(data);
					currentState='grid';
				}
			}
			
			private function doDelete():void
			{
				ws.deleteContact(contactList.selectedItem.id);
				currentState='grid';
			}
			
			private function doLogin():void
			{
				if(Validator.validateAll([val3, val4]).length == 0)
				{
					ws.login(usernameEdit.text, passwordEdit.text);
					usernameEdit.enabled=false;
					passwordEdit.enabled=false;
					loginProgress.visible=true;
				}	
			}
			
			private function loginReturned(event:ResultEvent):void
			{
				if(!event.result)
				{
					usernameEdit.enabled=true;
					passwordEdit.enabled=true;
					loginProgress.visible=false;
					Alert.show("Username and password did not match!", "Login Error");
				}
				else
				{
					ws.getContacts();
					currentState='grid';
				}
			}
		]]>
	</mx:Script>
		
	<mx:Panel layout="vertical" title="Yii Phone Book" id="panel1" resizeEffect="Resize">
		<mx:Form id="loginForm">
			<mx:FormItem label="Username:">
				<mx:TextInput id="usernameEdit" />
			</mx:FormItem>
			<mx:FormItem label="Password:">
				<mx:TextInput id="passwordEdit" displayAsPassword="true"/>
				<mx:Label text="Use demo/demo to login" color="#999999" />
			</mx:FormItem>
			<mx:FormItem>
				<mx:Button label="Login" click="doLogin()" id="button1"/>
			</mx:FormItem>
			<mx:ProgressBar width="100%" indeterminate="true" id="loginProgress" showEffect="Fade" hideEffect="Fade"
				labelPlacement="center" label="Verifying..." color="#ffffff" visible="false"/>
		</mx:Form>
		<mx:ControlBar id="controlbar1">
			<mx:Button label="New" click="contactList.selectedIndex=-1; currentState='details'" id="newButton" visible="false" />
			<mx:Button label="Delete" enabled="{contactList.selectedIndex >= 0}" click="doDelete()" id="deleteButton" visible="false" />				
		</mx:ControlBar>
	</mx:Panel>
	
</mx:Application>