good afternoon to you all.

i'm trying to achieve something like this.

pseudo-code:

Ckeyboard k = new Ckeyboard();

void Setup()
{
   k.ALT_key(DoSomething());
}


void DoSomething()
{
     print('i did it');
}



public class Ckeyboard
{
  void ALT_key(Tfunc func)
   {
         // function func is executed here
         execute function;
   }
}

well, in the end function DoSomething() will be executed when i press ALT key.

note: code to catch key events is NOT in the class keyboard, but lets pretend is there.

anybody knows how can i pass functions as arguments?

You cannot, and in languages allowing it, you pass the name of the function, not a call (with parentheses)...

In Java, you pass instead objects of a class implementing a known callback method:
Code:

Ckeyboard k = new Ckeyboard();

void setup()
{
   k.ALT_key = new KeyboardHandler();
}

interface KeyboardListener
{
   // Function to implement (mandatory)
   void Handle(KeyKind kk);
}

class KeyboardHandler implements KeyboardListener
{
  void Handle(KeyKind kk)
  {
     print('i did it with ' + kk);
  }
}


public class Ckeyboard
{
   KeyboardListener ALT_key;

   void KeyPressed()
   {
	if (key == ALT)
	{
	   // function func is executed here
	   ALT_key.Handle(key);
	}
   }
} 

That's rough sketchy pseudo-code, of course.