I have created a button class with an event handler for when the button is
clicked. The event handler should simply go to the next frame and play.
However, if I code _root.nextFrame(); in the class definition, I am getting an
access of undefined property error. Am I missing importing a class or two?

Thanks for the reply. I'm pretty new to AS3 so bare with me. After reading last
night I realise _root is no longer global and is replaced with root as well.
How do I make this available to my class? I have also tried accessing
root.nextFrame as a test from the main timeline but get the same error. I
thought if the object/class you reference root from derived from a
DisplayObject type you should automatically have access. The class I was trying
to access root.nextFrame from is linked to a moveclip in the library which is
to be used as a generic next frame button if that makes sense. Thanks

if you're instantiating a class member from the main timeline, you can pass a
reference in the constructor. otherwise, you can always use a main timeline
class and make it globally accessible:



// with a class instantiated on the main timeline:

var myClassMember:myClass=new myClass(this); // and in your class file:
function myClass(_mc:MovieClip){ //_mc is main timeline ref}

// or you can always use a mainTL class:

package {
// usage, on main timelne: var mtl:mainTL=new mainTL(this);
// usage, from any class needing access to the root timeline: mainTL.root
// usage, from any class needing access to the stage timeline:
mainTL.root.stage
import flash.display.MovieClip;
import flash.display.DisplayObjectContainer;

public class mainTL extends MovieClip {

public static var root:DisplayObjectContainer;

public function mainTL(rt:DisplayObjectContainer) {
mainTL.root = rt;
}
}
}

Thanks for this. I used the following code :-
package
{
import flash.display.MovieClip;
import flash.events.MouseEvent;
public class nextButton extends MovieClip
{
function nextButton()
{
this.addEventListener(MouseEvent.CLICK,clickhandler);
}
function clickhandler(event:MouseEvent):void {
(root as MovieClip).nextFrame();
}
}
}
But I see now what you are doing. Cheers

if nextButton is instantiated on the root timeline you can use:



// in your fla:

var btn1:nextButton=new nextButton(this);

// and in your class

package
{
import flash.display.MovieClip;
import flash.events.MouseEvent;

public class nextButton extends MovieClip
var rt:MovieClip;
{
function nextButton(rt:MovieClip)
{
this.rt=rt;
this.addEventListener(MouseEvent.CLICK,clickhandler);
}
function clickhandler(event:MouseEvent):void {
event.currentTarget.rt.nextFrame();
}
}
}