class calling other class functions?

[squidge]

'verifica' isn't a static member function so where is your class instance variable?

[Hardstyle]

is posted in newbie section...i don't know what you mean

[Zlatomir]

He meant that you can't do this:

void Button::apasat()
{
MyWidget::verifica(y,x);
}

void Button::apasat()
{
MyWidget::verifica(y,x);
}

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You need to create an object of type MyWidget, something like this:

MyWidget obj; //create an instance of MyWidget class
obj.verifica(); // run the member function;

MyWidget obj; //create an instance of MyWidget class
obj.verifica(); // run the member function;

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An if MyWidget is an GUI widget you might want to allocate memory on the heap for objects, like this:

MyWidget *ptr = new MyWidget(parent); //alocate with "new" and give a parent
ptr->verifica(); // call member function with pointer

MyWidget *ptr = new MyWidget(parent); //alocate with "new" and give a parent
ptr->verifica(); // call member function with pointer

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If you don't understand take at least a tutorial of c++ first, and than a Qt one (or Qt examples), but i strongly recommend a book.