Simon Wacker

I needed a multiple inheritance script for one of my projects and I thought maybe it would be helpful for other’s too. It also enables you to edit the prototype chain during runtime. So here is the code:

o = _global.MultipleInheritance=function () {}
o.initialize = function(obj) {
        if(obj.classes == undefined) obj.classes = new Object();
        obj.__resolve = this.__resolve;
        obj.addClass = this.addClass;
        obj.removeClass = this.removeClass;
        return obj;
}
o.__resolve = function() {
        for (var i in this.classes) {
                var f = this.classes[i].prototype[arguments];
                if(f != undefined) return f;
        }
}
o.addClass = function() {
        if(arguments.length>1){
                for(var i in arguments){
                        this.classes[arguments[i]] = eval(arguments[i]);
                }
        } else {
                this.classes[arguments] = eval(arguments);
        }
}
o.removeClass = function() {
        if(arguments.length>1){
                for(var i in arguments){
                        delete this.classes[arguments[i]];
                }
        } else {
                delete this.classes[arguments];
        }
}
delete o;

// example
SuperClass1 = function () {}
SuperClass2 = function () {}

// 1
SubClass = function () {}
MultipleInheritance.initialize(SubClass.prototype);
SubClass.prototype.addClass(”SuperClass1“, “SuperClass2“);

// 2
this.createEmptyMovieClip(”mc“, 1);
MultipleInheritance.initialize(this.mc);
this.mc.addClass(”SuperClass1“, “SuperClass2“);

Posted in Flash