[SOLVED] Component name

[Pe3s]

Hello, how can I pass a component name as a variable or constructor?

Code: Pascal  [Select][+][-]

1. procedure(componentName :)

[AlexTP]

Youtube has videos for 'Pascal tutorial' search; you need them.

[RayoGlauco]

Pe3s, are you talking about passing a string (a component name) as a constructor (a procedure)?
This is nosense.
Yo need to explain this better.

[balazsszekely]

Most likely OP wants to pass a component to another class. Use the constructor, like this:

Code: Pascal  [Select][+][-]

1. type
2.   TMyClass = class
3.   private
4.     FForm: TForm;
5.   public
6.     constructor Create(AForm: TForm);
7.   end;
8.  
9. //..
10.  
11. constructor TMyClass.Create(AForm: TForm);
12. begin  
13.   FForm := AForm;
14.   //use FForm, you don't have to free it on destructor
15. end;
16.  
17.  

[Thaddy]

Pe3s, are you talking about passing a string (a component name) as a constructor (a procedure)?
This is nosense.
Yo need to explain this better.

Well, the constructor can be done to some extend, but OP should mind that FPC is not a scripting language.
It is unusual to use such constructs.
The technique to use is to use {$if declared(variableName)} in combination with RTTI to get a class reference from which you can create an instance. Highly NOT recommended, but that would work, I guess.

[howardpc]

Well, the constructor can be done to some extend, but OP should mind that FPC is not a scripting language.
It is unusual to use such constructs.
The technique to use is to use {$if declared(variableName)} in combination with RTTI to get a class reference from which you can create an instance. Highly NOT recommended, but that would work, I guess.

"the technique to use ... highly NOT recommended" seems like a self-contradiction.
RTTI is currently only available via FPC for published properties of classes and a few other limited cases.
What is so unusual about passing data as parameter(s) in a constructor? You make it sound as if such a technique were unsound or hackish. It is a perfectly acceptable way to pass data that you don't want exposed globally.

[Pe3s]

Thank you. greetings

[PascalDragon]

Well, the constructor can be done to some extend, but OP should mind that FPC is not a scripting language.
It is unusual to use such constructs.
The technique to use is to use {$if declared(variableName)} in combination with RTTI to get a class reference from which you can create an instance. Highly NOT recommended, but that would work, I guess.

"the technique to use ... highly NOT recommended" seems like a self-contradiction.
RTTI is currently only available via FPC for published properties of classes and a few other limited cases.
What is so unusual about passing data as parameter(s) in a constructor? You make it sound as if such a technique were unsound or hackish. It is a perfectly acceptable way to pass data that you don't want exposed globally.

I think the “highly NOT recommended” is related to Thaddy's idea of using {$if declared(variableName)}. The idea of using RTTI would of course be alright if the extended RTTI would already be integrated.

[Akira1364]

Can you give an example of what you're actually trying to do?