AS2 to AS3 help!

[Rachyy95]

Hello,

I'm only a beginner at coding and need to migrate AS2 code to AS3 code. I get this error code: 'Call to possibly undefined method eval.' and don't know how to fix it.

Below is just a section of the code where the error is- but if you need the whole thing I can send that too.

Thanks

};

foam_btn.onRelease = function() {

  // this._visible = false;

  videoLoop_mc.gotoAndPlay("exit");

  triangle_mc.gotoAndPlay("oxygenHeat");

  new Tween(eval(currentExt), "alpha", None.easeNone, 100, 0, fadeTime, false);

  currentExt = "foamInfo_mc";

  new Tween(eval(currentExt), "alpha", None.easeNone, 0, 100, fadeTime, false);

  currentFactor = "oxygen_mc";

  new Tween(eval(currentFactor), "alpha", None.easeNone, 100, 0, fadeTime, false);

  currentFactor = "heat_mc";

  new Tween(eval(currentFactor), "alpha", None.easeNone, 100, 0, fadeTime, false);

  nextFade();

  foamTrigger = true;

  buttonDisable();

  this.gotoAndStop(1);

  visited(foam_btn,foamTrigger);

  twoFactors = true;

};

[Colin Holgate · Accepted solution]

The button onRelease part can't work, you need to addEventListener instead. Which would make it start like:

foam_btn.addEventListener(MouseEvent.CLICK,foamclicked);

function foamclicked(e:MouseEvent){

// etc

You don't show where currentExt is set up for the first time, but in any case I would put the symbol name into the tween, instead of using eval(). So, like:

  new Tween(foamInfo_mc, "alpha", None.easeNone, 0, 100, fadeTime, false);

instead of:

  currentExt = "foamInfo_mc";

  new Tween(eval(currentExt), "alpha", None.easeNone, 0, 100, fadeTime, false);

It is possible that this["foamInfo_mc"] would behave the same as eval("foamInfo_mc"). But no need to do that, if the line I gave works.

[Rachyy95]

Thank you for you help! That worked fine.

Can you help me with this bit aswell ? Or point me in the right direction...

water_btn.onRollOut = water_btn.onDragOut=water_btn.onReleaseOutside=function () {

  visited(water_btn,waterTrigger);

};

powder_btn.onRollOut = powder_btn.onDragOut=powder_btn.onReleaseOutside=function () {

  visited(powder_btn,powderTrigger);

};

foam_btn.onRollOut = foam_btn.onDragOut=foam_btn.onReleaseOutside=function () {

  visited(foam_btn,foamTrigger);

};

co2_btn.onRollOut = co2_btn.onDragOut=co2_btn.onReleaseOutside=function () {

  visited(co2_btn,co2Trigger);

};

blanket_btn.onRollOut = blanket_btn.onDragOut=blanket_btn.onReleaseOutside=function () {

  visited(blanket_btn,blanketTrigger);

};

[Colin Holgate]

The general case is that instead of btn.onSomething = function() you do btn.addEventListener("eventtype",functionname). This page shows you what event types there are:

MouseEvent - Adobe ActionScript® 3 (AS3 ) API Reference

There are some event types that don't exist in AS3, that were in AS2, and you would need to find another way to get the same results.

It could be worth you trying to figure out some of that for yourself, and then ask about the bits you're stuck on.