Constant properties in classes

Hi,

is it possible to define a constant property in a class which depends on other constant properties in the same class?

Would that also be correct?

thank you for your answer in advance!

Answer 1

[Guillaume]

Yes, constant properties can be calculated from other constant properties. It's the first example in the doc actually.

[Ahmed Hossam]

I've just seen this example after posting the question :D

[New]

Properties (Constant)
   a = 1; 
   b = a+1;
end
function ButtonPushed(app, event)
  app.EditField.Value = app.EditField.Value + app.b;
end

Message: Invalid default value for property 'b' in class 'App1': Undefined function or variable 'a'.

What's wrong?

[Guillaume]

As shown in the very first example in the link in my answer, you have to use the syntax:

classdef App1
    properties (Constant)
        a = 1; 
        b = App1.a+1;
    end

[Ganesh Gajavelli]

Yes, that was it for me too! Thanks so much!