Tween doesn't work in a function?

[Hulio]

What am I doin' wrong here? Anyone please? The tween stops working inside this init-function..? What should I use as a target?

 

function init() {

var current_sum : Number = 120.20;
var count : Number = 0.00;

TweenLite.to(this, 10, {count: current_sum, ease: Expo.easeOut, onUpdate: function () {

	txt_counter.text = format_decimals(count, 2) + ' \u20AC';

}});

}

[GreenSock]

You defined your "count" variable as a LOCAL variable inside the parent function. Local variables are always deleted as soon as the parent function finishes running. You're trying to access that local variable long after the parent function finished. Define the variable outside your function and you should be fine.

 

var count : Number = 0.00;
function init() {
  var current_sum : Number = 120.20;
  TweenLite.to(this, 10, {count: current_sum, ease: Expo.easeOut, onUpdate: function () {
     txt_counter.text = format_decimals(count, 2) + ' \u20AC';
  }});
}

 

For the record, I'm not a fan of anonymous functions like the one you're using for onUpdate. It's generally considered a bad practice in ActionScript - it can cause garbage collection problems.

[Hulio]

Oh jeeeah, of course. Thanks man!

 

Are u talking about this format_decimals -function there btw? If so, sorry for that, my mistake!

[GreenSock]

Are u talking about this format_decimals -function there btw?

Nope, I'm talking about this:

 

BAD:

TweenLite.to(this, 10, {count: current_sum, ease: Expo.easeOut, onUpdate: function () {
     txt_counter.text = format_decimals(count, 2) + ' \u20AC';
  }});

 

GOOD:

TweenLite.to(this, 10, {count: current_sum, ease: Expo.easeOut, onUpdate:myUpdateFunction});
function myUpdateFunction():void {
   txt_counter.text = format_decimals(count, 2) + ' \u20AC';
}

[Hulio]

Oh, I got it! You're absolutely right..

[Hulio]

Ok, now I'm having another problem here. I tried to convert this case to as3, but...

 

           (THE VARIABLES AT THE TOP OF THE DOCUMENT)

           private var mc_counter : Sprite;
           private var counter_txt : TextField;
           private var count : Number = 0; 

           (AND THE FUNCTION AFTER LOADING PROCESS)

           function preload_complete(event : LoaderEvent) : void {

               mc_counter = new Sprite();
               addChild(mc_counter);

               counter_txt = create_textfield(mc_counter, null, null, format_basic, false, false, 150, "center", 1);

               var current_sum : Number = 1000.20;

               TweenLite.to(this, 10, {count: current_sum, ease: Expo.easeOut, onUpdate: update_counter});

               function update_counter() : void {

                   counter_txt.htmlText = '
' + count + ' \u20AC';

               }

           }

 

...the counter doesn't do anything and I can't find out what's the problem. Thanks again!

 

Where is "this" referring to? What should I use instead of it?

[GreenSock]

This is why I always recommend avoiding nested functions. Nested functions are deleted when the parent function finishes running. So in your case, the onUpdate was calling a nested function which was deleted.

 

BAD:

function myFunction():void {
   TweenLite.to(this, 10, {count: 1000.20, ease: Expo.easeOut, onUpdate: update_counter});
   function update_counter() : void {
           counter_txt.htmlText = '
' + count + ' \u20AC';
   }
}

 

GOOD:

function myFunction():void {
   TweenLite.to(this, 10, {count: 1000.20, ease: Expo.easeOut, onUpdate: update_counter});
}
function update_counter() : void {
   counter_txt.htmlText = '
' + count + ' \u20AC';
}

[Hulio]

Nested or not, it loops only number zero, so I can't get the count increase. I'm sure it has something to do with the instance "this", I don't know where it is referring to. Everything is okay if I put this to the timeline on the same frame, but in the class it doesn't work...

[GreenSock]

Oh, it's because you made the variable private. So when TweenLite tries to set the "count" property on your object, it can't find it - it's "hiding" Make it public.

 

public var count : Number = 0; 

[Hulio]

Oh my, this get too heavy for me sometimes...so many things to understand. Thanks so much once again, you're the best!