Hello guys, I wonder why there are "classes" to use … but I have no clue why they are  used and how to use them.
Sorry, I'm beginner (not in time, but in apps I already composed)
And I'm not English, so please bare that in mind ….    
Thanks

vito49 said

Hello guys, I wonder why there are "classes" to use … but I have no clue why they are  used and how to use them…

In Object Orientated Programming, a class is a kind of template that you can use to create a new "instance" of an "object".
Sounds scary?

When you simply draw a control Button on a form, you use the Button class code to create a new instance (new version/new Button object) of the software that manages a button. This new button object allows you to customise your button with a new name, a new text caption, new size, new colour…and so on.

If we did not have a Button class we all would have to write our own code to draw our own buttons and control how they work …we would all be re-inventing the wheel!

I'll try to come up with a simple class example with its own Methods (Functions) and Properties.

Actually, just returning to the Button class may be the best example.

Start a new GUI Gambas project, but don't draw any components on the Form, just add this code to FMain.class:-


What this code is doing is creating a new button from the existing code class called Button. We call this creating a new instance of the class Button by declaring myButton as a Button.

We can then use the Button class Properties to set size, colour, text & so on.

Is this helping?

I have been working on this as well. Here is an example using a class to create a list of your music collection.

The Class may seem a little complicated, but I hope you can see how this small amount of code can do so much.


<IMG src="https://www.cogier.com/gambas/ClassExample.png"> </IMG>

the carpenters ??? really ???

PJBlack said

the carpenters ??? really ???

Really!!  

cogier said

PJBlack said

the carpenters ??? really ???

Really!!  

…he's only just begun

yeah … party  

back to topic:
charlie … i'm an f***ing old procedural programmer with big fears of OOP for a long time and it tokks me a lot of hard work to get into it … but while understanding how it works or maybe how i should work i will say "oh wow … how could i program without that" … taking your second example a newbie would likely say "oh hell …" but yes it shows what a class can be

vito:
fight your way trough … programing is fun and you will find solutions for problems that you won't have without programing

you may like to have a look here:

https://gambas-buch.de/dwen/doku.php?id=start

for years now hans lehmann wrote on that and for a starter it is very helpfully, most of it should be in english but also avail in german … i you have any questions the carpenters and the rest here will try to help you

…he's only just begun

I'm beginning to feel unwell ops:

Further reading from 12 months ago: Gambas One - Gambas ONE

cogier said

…he's only just begun

I'm beginning to feel unwell ops:

Don't feel bad Charlie.
Just sing , sing a song
because we long to be ,,,
close to you….


aaaaaaah aaaaaaah aaah
close to you