Forums: Flash:

I'm having scope problems in onMotionFinished when I set a bunch of tweens in a for loop:
(AS2)

for (var i:Number=0; i<navSectionArray.length; i++){

	var scope:MovieClip = mcNav["mc"+navSectionArray[i]];

	if (navSectionArray[i] == selectedNav){

		// selected

		this["bgTween"+i] = new Tween(scope.mcBG, "_width", Strong.easeOut, scope.mcBG._width, 100, .5, true);

		this["bgTween"+i].onMotionFinished = function(){

			trace ("open: "+scope);

		};

	} else {

		// others

		this["bgTween"+i] = new Tween(scope.mcBG, "_width", Strong.easeOut, scope.mcBG._width, 1, .5, true);

		this["bgTween"+i].onMotionFinished = function(){

			trace ("close: "+scope);

		};

	}

}

There is a DelegateWithArgs class that you could use.

Most tween engines like 'tweener' allow you to pass scope to the finished function, and you can always dump an object on the tweened objects scope as well

Probably the OOP way is to create a class

for (var i:Number=0; i<navSectionArray.length; i++){
var bgTweener: BgTweener = new BgTweener( mcNav["mc"+navSectionArray[i]], this["bgTween"+i] );
}

Thanks, I guess I'll have to create a class for it or something.

Well depends but it might be overkill...

For dealing with lots of buttons special Delegates are useful, quick google found this..

ultrashock.com/forums/actionscript/pass-movieclip-instance-name-95292.html

But for tweening built in tweens are really not the best way to go...

Tweener is the common approach for example see here...
hosted.zeh.com.br/tweener/docs/en-us/parameters/onCompleteScope.html

Many are switching to tweenlite...
//taken from examples page
import gs.*;
import gs.easing.*;
TweenLite.to(clip_mc, 5, {_alpha:0.5, _x:120, ease:Back.easeOut, delay:2, onComplete:onFinishTween, onCompleteParams:[5, clip_mc]});
function onFinishTween(parameter1:Number, parameter2:MovieClip):void {
trace("The tween has finished! parameters: " + parameter1 + ", and " + parameter2);
}
but its not strictly opensource so it may not fit you need, but prob will.