Question

I’m having quite some trouble to try and get an app I wrote in AS2 to AS3. The reason I need to go to AS3 is something icky, so I won’t go into detail about it.

I’ve got 90% of the application running with the new code. Now I’ve come to the point where I have to convert this code from AS2,

function setAnimation(theObject,id) {     theObject.vensterid=id;     theObject.onEnterFrame = function()     {         var myHoriTween:Tween = new Tween (this,'_x',Strong.easeOut,this._x,(130+((theObject.vensterid-frameno)*260)),1,true);     } }  setAnimation(venster0,0); 

, to AS3. My attempt of doing this ended up like

function setAnimation(anObject,id) {     var theObject = this[anObject];     theObject.vensterid=id;     function slideHorizontal(event:Event)     {             var myTween:Tween = new Tween (theObject,'x',Strong.easeOut,this.x,(130+((theObject.vensterid-frameno)*260)),1,true);     }     theObject.addEventListener(Event.ENTER_FRAME,slideHorizontal); }  setAnimation(venster0,0); 

and gives me the following non-error (it doesn’t show as a compiler error, but as output):

TypeError: Error #1010: A term is undefined and has no properties.     at sliding_windows_as3_fla::SlideMenu_1/setAnimation()     at sliding_windows_as3_fla::SlideMenu_1/frame1() 

I think this is very strange since it doesn’t say anything about which term (and there are quite a lot) and googling didn’t find me an explanation either.

Answer 1

I didn’t get the chance to test your code, because it’s difficult to set up a context for it, but my thoughts would be:

1. You should declare the parameter types: function setAnimation(anObject:Object,id:uint):void. It’s at least good practice.
2. var theObject = this[anObject]; is completely unnecessary if your variable anObject is an object. I think var theObject = this[anObject]; doesn’t work, theObject ends up being null and that’s why you get your error. If you have declared a variable called venster0, that is the instance of a class that extends Object, then you can pass the reference to it without any other trouble.
3. Depending on the object you work with, theObject.vensterid=id; might not work. The class that theObject instances must have the ‘vensterid’ property, or you will get `1119: Access of possibly undefined property vensterid through a reference with static type …