Function.extend
Summary
Provides creating javascript classes by using pi.base.With this method you can extend a class with other classes. If not another class will be extended, use the extend method of pi.base.
Syntax
var className = superClass.extend({
"$Init":Constructor,
property name:value,
private member:value
},boolean skipClonning (optional))
General Usage
>>> var myClass = pi.base.extend({
"$Init":function(_argument){
this.properties.setProperty(_argument);
};
"method":function(){
return "Hello World";
},
"properties":{ // pi.base clones the hash members automatically
"_property":0 // private member and getter/setter methods are created automatically.
}
});
>>> var a = new myClass;
>>> myClass.$Init
function
Examples
Example #1: Create a class "person" with a class "user" which is extending the class. To test the extended class use trace.
Source files of the above example:
../../examples/extend.html
<div id="container"></div>
../../examples/extend.js
var person = pi.base.extend({
"$Init":function(_name,_age,_country){
this.environment.setName(_name).environment.setAge(_age).environment.setCountry(_country);
},
"environment":{
"_name":"", "_age":0, "_country":""
}
});
var eto = new person("Eto Demerzel","30","Aurora");
var user = person.extend({
"$Init":function(_email,_password,_name,_age,_country){
person.$Init.call(this,_name,_age,_country);
this.environment.setEMail(_email).environment.setPassword(_password);
},
"environment":{
"_eMail":"", "_password":"",
"_name":"", "_age":0, "_country":""
}
});
var seldon = new user("hseldon@streeling.edu","dors123raych","Hari Seldon","70","Trantor");
pi.util.Init.push(function(){
trace(
pi.get("container"), // asagidaki bilgiler bu element'in icine yazdirilacak.
"<strong>Person: eto</strong>",
"name: "+eto.environment.getName(),
"age: "+eto.environment.getAge(),
"country: "+eto.environment.getCountry(),
"<strong>User: seldon</strong>",
"email: "+seldon.environment.getEMail(),
"password: "+seldon.environment.getPassword(),
"name: "+seldon.environment.getName(),
"age: "+seldon.environment.getAge(),
"country: "+seldon.environment.getCountry()
);
});