Flex 3 Tool tip Component

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
  xmlns:s="library://ns.adobe.com/flex/spark"
  xmlns:mx="library://ns.adobe.com/flex/mx"
  height="100%"
  width="100%">

<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;

import script.ExtendToolTip;

[Bindable]
public var dp:ArrayCollection=new ArrayCollection();
[Bindable]
public var myArray:Array=[1, 2, 3, 4];

[Embed("//assets/images/ic_appo_cal.png")]
[Bindable]
public var patient_photo:Class;

private function createTip(tip:String):ExtendToolTip
{
var imageToolTip:ExtendToolTip=new ExtendToolTip();
//for embeded image
imageToolTip.ImageTip=imgPatient.source;
//for external image
//imageToolTip.ImageTip = "http://l.yimg.com/t/img/new_in_fp_logo.gif";
imageToolTip.TipText=tip;
return imageToolTip;
}
]]>
</fx:Script>

<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<mx:VBox height="100%" width="100%">
<mx:HBox height="50%" width="50%">
<s:Image id="imgPatient"  
source="{patient_photo}"  width="100" height="100" 
toolTip="anna" 
toolTipCreate="event.toolTip=this.createTip(event.currentTarget.toolTip)"  />
<s:Label text="anna"/>
</mx:HBox>
</mx:VBox>
</s:Application>

===========================

ExtendToolTip.as

package script

{

 

import flash.display.Bitmap;

import mx.containers.*;

import mx.controls.Alert;

import mx.controls.Label;

import mx.core.*;

import spark.components.Image;

public class ExtendToolTip extends VBox implements IToolTip

{

private var image:Bitmap = new Bitmap();

private var lbl:Label;

private var imageHolder:Image;

private var tipText:String;

[Bindable]

public function set ImageTip(img:*):void{

if(img is Class){

imageHolder.source = img;

}

if(img is Object){

imageHolder.source = img;

} 

if(img as String){ 

imageHolder.source=img;

}

}

[Bindable]

public function set TipText(txt:String):void{

lbl.text = txt;

}

public function get TipText():String{

return tipText;

}

public function ExtendToolTip()

{

mouseEnabled = false;

mouseChildren = false;

setStyle("percentWidth",50);

setStyle("percentHeight",50);

setStyle("paddingLeft",10);

setStyle("paddingRight",10);

setStyle("paddingTop",10);

setStyle("paddingBottom",10);

setStyle("backgroundAlpha",0.5);

setStyle("backgroundColor",0xffffff);

imageHolder = new Image();

lbl  = new  Label();

lbl.setStyle("color",0x0B0B61);

lbl.setStyle("fontWeight","bold");

lbl.setStyle("fontSize",18);

imageHolder.source = image;

addChild(imageHolder);

addChild(lbl);

}

public function get text():String

{

return null;

}

[Bindable]

public function set text(value:String):void    {

tipText = value;

}

}

}