Problem with my object inherited from QGraphicsPixmapItem

[firebeard6666]

Hi there,

I'm just a newbie with Qt and I can t do a proper object inheritance with Qt. I'm trying to do a Frogger. My part is about the cars. However I try to do a vehicle class from a public QGraphicsPixmapItem but I can 't do it, it doesn't appear in the scene.


My class vehicule.h
class Vehicule : public QObject, public QGraphicsPixmapItem
{
Q_OBJECT
public:
Vehicule(const QPixmap &pix, QGraphicsItem *parent = 0);

QRectF boundingRect() const;


protected:
void advance(int step);

private:
QPixmap Skin;
};
My vehicule.cpp
#include "vehicule.h"

#include <QGraphicsScene>
#include <QGraphicsPixmapItem>
#include <QStyleOption>

#include <math.h>

//! [0]
Vehicule::Vehicule(const QPixmap &pix, QGraphicsItem *parent): QGraphicsPixmapItem(parent)
{
Skin = pix;
}
//! [0]
//! [1]
QRectF Vehicule::boundingRect() const
{
qreal adjust = 0.5;
return QRectF(-18 - adjust, -22 - adjust,
36 + adjust, 60 + adjust);
}Part of my main.cpp
//VEHICULE
QPixmap WinM((":/images/windower.jpg"));

Vehicule *win = new Vehicule(WinM);
win->setZValue(1);
scene.addItem(win);

return a.exec();

Thank you for your help

[ChrisW67]

Is WinM.isNull() == false?
Your Vehicule constructor code does not pass the QPixmap on to the underlying QGraphicsPixmapItem constructor.

[firebeard6666]

Hi there,

No why should I make WinM.isNull() == false?
Now my constructor looks like.

Vehicule::Vehicule(const QPixmap &pix, QGraphicsItem *parent): QGraphicsPixmapItem(pix,parent)
{
Skin = pix;
}
but still invisible in my scene.
Regards

---

Added after 33 minutes:

I don't understand now it's working. And I did not change my code oO.
damned and thank by the way

[ChrisW67]

No why should I make WinM.isNull() == false?

If WinM.isNull() is true then your pixmap was not successfully loaded and will not display. That is why you would check (not set) the value.