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Encapsulation.html
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Encapsulation.html
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<!DOCTYPE html>
<html>
<body>
<script>
/**
* A Introduction to Javascript OOP
* Written by Luis Castillo
* For Alivebox www.alivebox.com
*/
var Figura = function (c, stroke) {
// Variable privada
var _color = c;
// Variable publica
this.stroke = null;
// Necesario para poder acceder
// a this desde los mteodos privados
var self = this;
// Mtodo privado
var _setup = function(s) {
// acceder a metodos publicos
// a traves de self. Y a los privados directamente
self.stroke = s;
};
_setup(stroke);
// Metodos pblicos
this.draw = function() {
console.log("Figura::draw in color " + _color + " and stroke " + this.stroke );
};
this.getColor = function() {
return _color;
};
};
var f = new Figura("red", "thin");
console.log(f._color); // undefined
console.log(f.getColor()); // red
console.log(f.stroke); // thin
//f._setup("thick"); // Error: Object has no method _setup
var f2 = new Figura("blue","thick");
console.log(f2._color); // undefined
console.log(f2.getColor()); // blue
console.log(f2.stroke); // thick
//f._setup("thick"); // Error: Object has no method _setup
f.draw();
f2.draw();
</script>
</body>
</html>