Alternative way of instanciating a class without a library and without the
__Package hack either.
Create a class with this function:
function attachClassMovie(parentmc:MovieClip, className:Function,
instanceName:String, depth:Number, argv:Array):MovieClip
{
// Create emptyMovieClip
var new_mc:MovieClip = parentmc.createEmptyMovieClip(instanceName, depth);
// Save classe prototype
new_mc.__proto__ = className.prototype;
// apply the constructor
className.apply(new_mc, argv);
// return new clip
return new_mc;
}
var mc = attachClassMovie(parent_mc, com.Class, "child", 10, ["param1",
"param2"]);
2006/7/7, Julian Bleecker <[EMAIL PROTECTED]>:
Ian,
Those casting gymnastics definitely help — thanks a lot.
Julian
On Jul 7, 2006, at 9:27 PDT, Ian Thomas wrote:
> On 7/7/06, Julian Bleecker <[EMAIL PROTECTED]> wrote:
>> One other thing occurred to me on this topic, that might actually
>> save the trouble of using a hash table, which AS direly needs.
>>
>> Is there a way to summon forth a class that's been instantiated in
>> any of the ways described below, by name?
>>
>> In other words, if I've done this:
>>
>> for(var i:Number = 0; i < 12; i++) {
>> Object.registerClass(symbolName,FooA);
>> var clip:FooA=FooA(myMovie.attachMovie
>> (symbolName,"anInstanceName_"+i,depth));
>> }
>>
>> And elsewhere, I want to summon forth these dynamically in another
>> loop or otherwise (something I might normally do by stuffing the
>> instances in a hash or map somewhere and using the name as the key) -
>> can I do that in some fashion? Is there an AS idiom for obtaining a
>> reference to a MovieClip (or other runtime object) by name?
>>
>> Julian
>
> Firstly, Actionscript does have the equivalent of a HashMap.
> Everything derived from Object can be treated like so:
>
> var obj:Object=new Object();
> obj["someKey"]="Hello";
> trace(obj["someKey"]); // traces "Hello"
>
> The bracket access on an object actually accesses the properties and
> methods of that object.
> Hence:
> var myClip:MovieClip = ...some movieclip...
> trace(myClip._visible);
> trace(myClip["_visible"]); // equivalent to the last line
> myClip.doSomething(1,2,3);
> myClip["doSomething"](1,2,3); // equivalent to last line.
> myClip._y=20;
> myClip["_y"]=20; // again, equivalent
>
> When you create/attach an instance of a MovieClip to a parent
> movieclip, you are actually creating new properties on that parent
> clip.
>
> So:
> var myClip:MovieClip=someClip.attachMovie("Symbol","aNewClip",1);
> trace(myClip==this["aNewClip"); // traces 'true'
>
> To get back to your original question, this means you can type:
> var myClip:MovieClip=myMovie["anInstanceName_0"];
>
> to retrieve your clip.
>
> HTH,
> Ian
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