Flex : VideoDisplay

VideoDisplay control to play back video files that have been encoded as either Flash Video (FLV) videos or MPEG-4 videos with H.264 encoding. The VideoDisplay control can display both progressive download video and streaming video. A Flex VideoDisplay control can be created with the <mx:VideoDisplay> MXML tag.

The Flex framework comes with only the most basic video controls, which is the video playback control. It doesn’t include a prebuilt video player with play and pause buttons or a volume control. You can easily build your own, simple playback controls, but just be aware that the VideoDisplay control displays only video.

Code:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
    layout="vertical"
    verticalAlign="middle"
    horizontalAlign="center"
    backgroundGradientAlphas="[1.0, 1.0]"
    backgroundGradientColors="[#000000, #000000]">

 <mx:Script>
  <![CDATA[

   import mx.events.VideoEvent;

   [Bindable]
   private var videoStatus:String;

   private function callPlayHead(e:VideoEvent):void
   {
    videoStatus = videoDispID.playheadTime + 
                                  " / " + videoDispID.totalTime;
   }
  ]]>
 </mx:Script>

 <mx:VideoDisplay id="videoDispID"
      source="assets/Video Song.flv"
      playheadUpdate="callPlayHead(event);"/>

 <mx:Label text="Status : {videoStatus}"
     color="#4E92A0"
     fontWeight="bold"/>

 <mx:HBox>
  <mx:Button label="Play"
       enabled="{videoDispID.playing == false}"
       click="videoDispID.play();"/>
  <mx:Button label="Pause"
       enabled="{videoDispID.playing == true}"
       click="videoDispID.pause();"/>
  <mx:Button label="Stop"
       enabled="{videoDispID.playing == true}"
       click="videoDispID.stop();"/>
 </mx:HBox>

</mx:Application>

Function parameters

Pass by Value

function passPrimitives(xParam:int, yParam:int):void
{
  xParam++;
  yParam++;
  trace(xParam, yParam);
}

var xValue:int = 10;
var yValue:int = 15;

trace(xValue, yValue);          // 10 15
passPrimitives(xValue, yValue); // 11 16
trace(xValue, yValue);          // 10 15

Pass by Reference

function passByRef(objParam:Object):void
{
  objParam.x++;
  objParam.y++;
  trace(objParam.x, objParam.y);
}

var objVar:Object = {x:10, y:15};

trace(objVar.x, objVar.y);  // 10 15
passByRef(objVar);          // 11 16
trace(objVar.x, objVar.y);  // 11 16

The objParam parameter references the same object as the global objVar variable. As you can see from the trace statements in the example, changes to the x and y properties of the objParam object are reflected in the objVar object.

AS3 : Dynamic classes

A dynamic class defines an object that can be altered at run time by adding or changing properties and methods. A class that is not dynamic, such as the String class, is a sealed class. You cannot add properties or methods to a sealed class at run time.

You create dynamic classes by using the dynamic attribute when you declare a class. For example, the following code creates a dynamic class named "DynamicClass".

Code : /*Main.as*/

package
{
 import flash.display.Sprite;

 public class Main extends Sprite
 {
  public function DynamicClassCode()
  {
   var dClass:DynamicClass = new DynamicClass();

   dClass.age = 25; // Dynamically add new variable.
   // Dynamically add new Method.
   dClass.getDetails = function():void 
   {
    trace(dClass.nama);
    trace(dClass.age);
   }
   
   dClass.getDetails(); // Method call
  }
 }
}

dynamic class DynamicClass
{
 public var nama:String = "Abdul";
}