Qt/C++ Give pointer to another constructor

Question

So i hope someone can help me again with the following. I want to use a pointer from one class in another one.

car.h

class wheel;

class car : public QMainWindow
{
public:
    car (QWidget *parent = 0);

    wheel *test;
};

class wheel : QGraphicsPixmapItem
{
public:
    wheel();

    void hoverEnterEvent (QGraphicsSceneHoverEvent*);
};

car.cpp

#include "car.h"

wheel::wheel()
{

}

car::car (QWidget*)
{
    test = new wheel;
    test -> setAcceptHoverEvents (true);
}

wheel::hoverEnterEvent (QGraphicsSceneHoverEvent*)
{
    test -> setPixmap (/*thePixmap*/);
}

The problem is, i cant use the pointer "test" in class wheel, and i really dont know how i can do this "without" making the pointer "test" global.

I suggest you get your hands on a [good C++ book](http://stackoverflow.com/questions/388242/the-definitive-c-book-guide-and-list) before you tackle Qt. — Etienne de Martel, Jul 18 '12 at 17:54

score 2 · Accepted Answer · answered Jul 18 '12 at 17:49

2

wheel::hoverEnterEvent is part of the wheel class. It doesn't need a pointer to itself to operate on itself, so just replace

test -> setPixmap (/*thePixmap*/);

with

setPixmap (/*thePixmap*/);

answered Jul 18 '12 at 17:49

Chris

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Qt/C++ Give pointer to another constructor

1 Answers1