as3 Classes and subclasses

programming flash
1

I’m new to classes.

I’ve been struggling with a videoPlayback class and a fullscreenControls subclass.

Maybe I’m approaching this wrong, but first, I create an object with the videoPlayback class.

Upon clicking the fullscreen button I’ve created it calls a method within the videoPlayback class that changes the video size and creates a new object with the fullscreenControls class that extends the videoPlayback class. I also override the method that creates a new video from the video playback class.

All of this works fine and dandy, but when I try to call methods from the fullscreenControls subclass back to videoPlayback using super.MethodName(); I get an error of an object being null.

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at videoPlayback/pauseVideo()
at fullscreenControls/fsPauseVideo()

videoPlaybackClass

package {
	import flash.text.TextField;
	import flash.media.Video;
	import flash.net.NetConnection;
	import flash.net.NetStream;
	import flash.events.NetStatusEvent;
	import flash.text.TextFieldAutoSize;
	import flash.display.MovieClip;
	import flash.events.Event;
	
	import flash.display.SimpleButton;
	import flash.events.MouseEvent;
	
	public class videoPlayback extends MovieClip {
		public var nc:NetConnection;
		public var ns:NetStream;
		public var vid:Video;
		public var fullscreenController:fullscreenControls;
			
		public function videoPlayback() {
			createVideo();
		}
		public function createVideo() {
			
			
			nc = new NetConnection();
			nc.connect(null);
			ns = new NetStream(nc);
			ns.play("videos/welcome.flv");
			vid = new Video ();
			ns.client = new customClient(); //creates custom client form customClient.as to watch for MetaData and Cue Points
			vid.attachNetStream(ns);
			addChild(vid);
		}
		public function restartVideo() {
			ns.seek(0);
			ns.resume();
		}
		public function pauseVideo() {
			ns.pause();
		}
		public function resumeVideo() {
			ns.resume();
		}
		public function minimizeVideo() {
			x = 482;
			y = 144;
			width = 500;
			height = 375;
		}
		public function fullscreenVideo() {
			y = 0;
			x = 0;
			width = 1024;
			height = 768;
			
			fullscreenController = new fullscreenControls;
			addChild(fullscreenController);
			
		}
	}
}

fullscreenControls Class

package {
	import flash.display.SimpleButton;
	import flash.display.MovieClip;
	import flash.events.MouseEvent;
	//import flash.display.DisplayObjectContainer;
	
	public class fullscreenControls extends videoPlayback {
		
		public function fullscreenControls() {
			super();
			fsPause_btn.addEventListener(MouseEvent.CLICK, fsPauseVideo);
		}
		override public function createVideo() { 
			//
		}
		public function fsPauseVideo(event:MouseEvent):void {
			super.pauseVideo();
		}
	}
}

Any help would be greatly appreciated.

I can find a way to do this without a subclass but I figured it would be a good idea to do it.