Custom Object "getter setter"

[flashgod]

Hi,

Im building custom properties and its working fine:

var myDiv = document.createElement('div');
myDiv.__defineGetter__("_x", function() { return this.style.left; });
myDiv.__defineSetter__("_x", function(x) { this.style.left = x+'px'; });

but... only it only works in Mozilla type browsers. It doesn't work in Safari! Arrrg!

Doesn anyone know a hack?

Thanks!

[Twey]

No, not really. Setters and getters aren't supported in a lot of browsers. You'll just have to use getX() and setX(newX).

[flashgod]

Yeah I'm using functions for this which work perfectly. Im sooo picky.

There has so be some way (bescides using a setInterval, thats cheating) to do this. Maybe I'll dismantle the form onchanged method. Its a start

[flashgod]

Heres my first attempt:

It works great, but Im weary of the CPU setIntervals can consume.

Object.prototype.addProperty = function($prop, $getter, $setter) {
	this[$prop] = "";
	this.getter = $getter;
	this.setter = $setter;
	var _this = this;
	this.listener = setInterval(function() {
		if(_this[$prop] != _this.getter()) {
			_this.setter(_this[$prop]);	
			_this[$prop] = _this.getter()	
		} 
	},30)
}

Useage ::
// Object.addProperty(property:String, getter:Function, setter:Function);
myDiv.addProperty("_x",function() { return this.style.left; }, function(x) { this.style.left = x+'px';});

This could be a perfect solution without the setInterval. Any ideas?

[Twey]

I don't understand what your problem is with JavaBeans-like getX() and setX(x).

[flashgod]

I dont have a problem with functions? I prob should of mentioned because it does sounds like over kill just to change syntax from _x() to _x, but its actually important to the project.

I'm a Flash designer/devleoper professionally and I wrote a JS class that allows you to write syntax just like Actionscript using javascript / AJAX. (Javascript with Actionscript Writing Syntax : "JAWS") Its really great and multi-browser-compatable. (except for the damn AS properties)

I did write them all as _x() _y() _alpha() etc.. which works, but its the only difference in syntax and I'm not stopping at 99% complete.

If I can't get a better method than the addProperty proto I wrote, I have a plan B.

[Twey]

Ah, I see. Well... no, I don't think you're going to get much better than that, but I can see it leading to race conditions. I'm afraid you might have to admit defeat on this one.

[flashgod]

Race conditions?