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Classes in ExtendScript ( Object Orientation)

Participant ,
Sep 08, 2020 Sep 08, 2020

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Is it possible to work with "true" Object Orientation in ExtendScript? I've tried to create classes and Objects with JS Synthax, but that won't work:

 

 

class Person {
    constructor(name, surname) {
        this.name = name;
        this.surname = surname;
    }
}

var person = new Person('Jack', 'Smith');
alert(person);

 

 

This only returns "invalid use of reserved word class".

 

What I am actually trying to do in the long run is to build an UI based on Objects. So, speaking in Pseudocode:

 

 

Class myUI {
constructor(group , dropdown1, text1  )
this.group = group (parameter)

this.dropdown1 = group.add(dropdownlist (parameter))

this.text1 = group.add(edittext (parameter))

}

...etc


myUI(group,dropdown,text);

 

 

Any Idea how something like this could work?

TOPICS
How to, Scripting, SDK

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correct answers 1 Correct answer

Adobe Community Professional , Sep 08, 2020 Sep 08, 2020
ExtendScript is based on super old ECMA version 3.something. So to imitate a Class, you'd need to use the old way, like this: function Person(name, surname){ this.name = name; this.surname = surname; } var person = new Person('Jack', 'Smith'); alert(person);

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Adobe Community Professional ,
Sep 08, 2020 Sep 08, 2020

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ExtendScript is based on super old ECMA version 3.something. So to imitate a Class, you'd need to use the old way, like this:

 

function Person(name, surname){
	this.name = name;
	this.surname = surname;
}

var person = new Person('Jack', 'Smith');
alert(person);

 

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Participant ,
Sep 08, 2020 Sep 08, 2020

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Thanks Tomas, that seems to work great!

 

First test running fine:

 

var myPanel = new Window("palette","title",undefined);

var dropContent = ["Slideshow","Texttafel","Typo Big","Video Container"];

function myUI(group, dropdownlist,myFirstText){
	this.group = group;
	this.dropdownlist = dropdownlist;
     this.myFirstText = myFirstText;
}

var newRow = new myUI('group', 'dropdownlist,undefined,dropContent','edittext {text:\'bla\'}');

myPanel.add(newRow.myFirstText);

myPanel.center();
myPanel.show();

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New Here ,
Sep 09, 2021 Sep 09, 2021

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Hello, is there any chance you could send me some sort of post about classes in after effects? I heard from a coder that they are useful but I just don't really know what they are. Google seems to think I am looking for extendscript courses when I type"class" so it's hard to find anything about it. I wanna learn! xD thanks!

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Participant ,
Sep 09, 2021 Sep 09, 2021

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Classes are the backbone of any object oriented language - wich extendScript is sadly only partly. As Thomas wrote, it's based on an very old ECMA Type 3, thats something like the "Mother Language" of some other languages, including Java Script. Because of that, I like to refer Java Script as some sort of "sister language" to extendScript, from whom you can borrow a lot.

 

So I'd suggest you read articles about object orientation (and classes) in general and  Java Script in detail to get a better understanding about how (or why not, in that case) oop works in extendScript. But basically, it doesn't 😉 Thomas already posted the only suitable workaround, but it's still a workaround until adobe changes the codebase to something from this century.

 

https://www.w3schools.com/Js/js_classes.asp

https://www.youtube.com/watch?v=SiBw7os-_zI

Or, if you speak german, another really good explanation: https://www.youtube.com/watch?v=2le2YYr3N7s

Learn the basics of object-oriented programming all in one video.✏️ Course created by Steven from NullPointer Exception. Check out their channel: https://www...
✘ Werbung: Jetzt Premium Mitgliedschaft sichern - https://programmieren-starten.de/premium-mitgliedschaft-lp1/?utm_source=youtube&utm_medium=share&utm_term=w...

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