Re: [Flashcoders] Can I assign a Class to the main timeline?
Thanks you Patrick and Weyert!
I tried Patrick's approach and it worked.
I had never used this __proto__ thing before.
Besides this, what do you use __proto__ or prototype for? I never use
it. Maybe I'm missing something.
thanks,
JulianG
Patrick Matte wrote:
Nice trick. But this seems to work as well but simpler.
class com.Application{
public function Application( target ) {
target.__proto__ = __proto__;
this = com.Application( target );
}
}
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Re: [Flashcoders] Can I assign a Class to the main timeline?
No clue, it just works ;-) ___ Flashcoders@chattyfig.figleaf.com To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
Re: [Flashcoders] Can I assign a Class to the main timeline?
On 7/21/06, JulianG [EMAIL PROTECTED] wrote:
Thanks you Patrick and Weyert!
I tried Patrick's approach and it worked.
I had never used this __proto__ thing before.
Besides this, what do you use __proto__ or prototype for? I never use
it. Maybe I'm missing something.
__proto__ is a property every object has (except Object.prototype, I
guess), pointing ot its prototype. It's the way inheritance works in
the Flash VM, the Prototype Chain.
Say you have Foo extending Bar. Then any instance myFoo of Foo will
have myFoo.__proto__ == Foo.prototype, and Foo.prototype.__proto__
will point to Bar.prototype. Since Bar only inherits from Object,
Bar.prototype.__proto__ will point to Object.prototype.
Now, when you try to access a property of myFoo, the VM will first
check if your instance has it itself. If not, it will check its
__proto__, than the __proto__ of the __proto__, and so on, until it
eventually ends up at Object.prototype. If that doesn't have it,
either, it will call myFoo.__resolve() and pass a string with the
identifier of what had been tried to be accessed as an argument, and
use what you return as its value.
So, if you do...:
var myFoo = new Foo();
myFoo.__proto__ = Foobar.prototype;
then you modify the inheritance, your myFoo will have all the methods
an instance of Foobar would have.
Think of how it used to be done in AS1 (still works, BTW). You'd
create a class by declaring a constructor function:
function Foo () {
this.text = hello world!;
}
to inherit from Bar, you'd create a new instance of Bar and assign it
as Foo's prototype:
Foo.prototype = new Bar();
Some didn't like to instantiate an instance of the parent class to
inherit from, so they did this instead (causing lots of interesting
discussions whether or not to stick with documented features, as
__proto__ was undocumented back then):
Foo.prototype.__proto__ = Bar.prototype;
To add methods (or properties), you'd attach them to that prototype:
Foo.prototype.sayHello = function () {
trace( this.text );
};
So, instead of myFoo = new Foo(), you could also do:
var myFoo = {};
myFoo.__proto__ = Foo.prototype;
myFoo.__constructor__ = Foo;
Foo.apply( MyFoo );
Which is precisely what you're doing right now, except for the last
line which calls the constructor.
HTH,
Mark
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Re: [Flashcoders] Can I assign a Class to the main timeline?
This is a very nice explenation, thanks!
Janosch
Mark Winterhalder schrieb:
On 7/21/06, JulianG [EMAIL PROTECTED] wrote:
Thanks you Patrick and Weyert!
I tried Patrick's approach and it worked.
I had never used this __proto__ thing before.
Besides this, what do you use __proto__ or prototype for? I never use
it. Maybe I'm missing something.
__proto__ is a property every object has (except Object.prototype, I
guess), pointing ot its prototype. It's the way inheritance works in
the Flash VM, the Prototype Chain.
Say you have Foo extending Bar. Then any instance myFoo of Foo will
have myFoo.__proto__ == Foo.prototype, and Foo.prototype.__proto__
will point to Bar.prototype. Since Bar only inherits from Object,
Bar.prototype.__proto__ will point to Object.prototype.
Now, when you try to access a property of myFoo, the VM will first
check if your instance has it itself. If not, it will check its
__proto__, than the __proto__ of the __proto__, and so on, until it
eventually ends up at Object.prototype. If that doesn't have it,
either, it will call myFoo.__resolve() and pass a string with the
identifier of what had been tried to be accessed as an argument, and
use what you return as its value.
So, if you do...:
var myFoo = new Foo();
myFoo.__proto__ = Foobar.prototype;
then you modify the inheritance, your myFoo will have all the methods
an instance of Foobar would have.
Think of how it used to be done in AS1 (still works, BTW). You'd
create a class by declaring a constructor function:
function Foo () {
this.text = hello world!;
}
to inherit from Bar, you'd create a new instance of Bar and assign it
as Foo's prototype:
Foo.prototype = new Bar();
Some didn't like to instantiate an instance of the parent class to
inherit from, so they did this instead (causing lots of interesting
discussions whether or not to stick with documented features, as
__proto__ was undocumented back then):
Foo.prototype.__proto__ = Bar.prototype;
To add methods (or properties), you'd attach them to that prototype:
Foo.prototype.sayHello = function () {
trace( this.text );
};
So, instead of myFoo = new Foo(), you could also do:
var myFoo = {};
myFoo.__proto__ = Foo.prototype;
myFoo.__constructor__ = Foo;
Foo.apply( MyFoo );
Which is precisely what you're doing right now, except for the last
line which calls the constructor.
HTH,
Mark
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Re: [Flashcoders] Can I assign a Class to the main timeline?
Thanks! Good explanation :-) ___ Flashcoders@chattyfig.figleaf.com To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
[Flashcoders] Can I assign a Class to the main timeline?
Hello guys: I'm new to the list. I've been using Flash for several years now, and I'm coding in AS2 since last year. I can create Classes with no problems. I usually extend my classes and other original Flash classes. I usually extend the MovieClip class and assign the class to a Symbol in the Library using the Linkage dialog box. So, most of my MovieClips instead of having code on a keyframe, they have a class assigned to them. Now the question is.. is there a way I can do the same, but with the main Timeline? I mean, I want my main timeline (which already supports all the members [properties and methods] of the MovieClip class ) to behave according to a certain Class that I write and that is an extension of the MovieClip class. Is this possible? where can I tell flash to associate a certain Class to the main timeline instead of a Symbol on the Library? Any documentation on this? Thanks in advance! JulianG ___ Flashcoders@chattyfig.figleaf.com To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
Re: [Flashcoders] Can I assign a Class to the main timeline?
You might want to try this, below the contructor of the
Application-class. This will be come the class associated with the main
class. Seems to work for me.
/**
* Constructor
*
* @paramtimelineThe timeline
*/
public function Application( target ) {
super();
//
target.__proto__ = __proto__;
target.__constructor__ = com.Application( com.Application );
this = com.Application( target );
com.Application( target );
}
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Re: [Flashcoders] Can I assign a Class to the main timeline?
Nice trick. But this seems to work as well but simpler.
class com.Application{
public function Application( target ) {
target.__proto__ = __proto__;
this = com.Application( target );
}
}
- Original Message -
From: Weyert de Boer [EMAIL PROTECTED]
To: Flashcoders mailing list flashcoders@chattyfig.figleaf.com
Sent: Thursday, July 20, 2006 8:31 PM
Subject: Re: [Flashcoders] Can I assign a Class to the main timeline?
You might want to try this, below the contructor of the
Application-class. This will be come the class associated with the main
class. Seems to work for me.
/**
* Constructor
*
* @paramtimelineThe timeline
*/
public function Application( target ) {
super();
//
target.__proto__ = __proto__;
target.__constructor__ = com.Application( com.Application );
this = com.Application( target );
com.Application( target );
}
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