Class
When a user class is defined in the project, it is loaded in the QodlyScript environment. A class is an object itself, of "Class" class, which has properties and a function.
Functions and properties
.name : Text contains the name of the 4D.Class object |
.new( { ...param : any } ) : 4D.Class creates and returns a cs.className object which is a new instance of the class on which it is called |
.superclass : 4D.Class returns the parent class of the class |
.name
.name : Text
Description
The .name
property contains the name of the 4D.Class
object. Class names are case sensitive.
This property is read-only.
.new()
.new( { ...param : any } ) : 4D.Class
Parameter | Type | Description | |
---|---|---|---|
param | any | -> | Parameter(s) to pass to the constructor function |
Result | 4D.Class | <- | New object of the class |
Description
The .new()
function creates and returns a cs.className
object which is a new instance of the class on which it is called. This function is automatically available on all classes from the cs
class store.
You can pass one or more optional param parameters, which will be passed to the class constructor function (if any) in the className class definition. Within the constructor function, the This
is bound to the new object being constructed.
If .new()
is called on a non-existing class, an error is returned.
Examples
To create a new instance of the Person class:
var person : cs.Person
person = cs.Person.new() //create the new instance
//person contains functions of the class
To create a new instance of the Person class with parameters:
//Class: Person.4dm
constructor(firstname : string, lastname : string, age : integer)
this.firstName = firstname
this.lastName = lastname
this.age = age
//In a method
var person : cs.Person
person = cs.Person.new("John","Doe",40)
//person.firstName : "John"
//person.lastName : "Doe"
//person.age : 40
.superclass
.superclass : 4D.Class
Description
The .superclass
property returns the parent class of the class. A superclass can be a 4D.Class
object, or a cs.className
object. If the class does not have a parent class, the property returns null.
A superclass of a user class is declared in a class by using the Class extends <superclass>
keyword.
This property is read-only.
Examples
var sup: variant
sup = 4D.File.superclass //Document
sup = 4D.Document.superclass //Object
sup = 4D.Object.superclass //null
// If you created a MyFile class
// with `extends File`
sup = cs.MyFile.superclass //File
See also: Super