QGraphicsObject doesn't display QPixmap - c++

Question

I'm developing a very simple application on win7 and running on win8.
When I run on win7 it shows the pixmap drawn by my QGraphicsObject subclass. However when I copy the exe and dll's to the my tablet it doesn't show the pixmap but everything else is the same.
Another problem is when I quit the application it says unexpectedly closed.
Here are the related parts
myImage::myImage(QGraphicsObject *parent) :
QGraphicsObject(parent)
{
pxm = new QPixmap("://images/flower.jpg");
setScale(0.5);
}
QRectF myImage::boundingRect() const
{
QRectF rect(0,0,pxm->width(),pxm->height());
return rect;
}
void myImage::paint( QPainter* painter,
const QStyleOptionGraphicsItem* /*option*/,
QWidget* /*widget*/ )
{
painter->drawPixmap( 0, 0, pxm->width(), pxm->height(), *pxm );
}
And here is the main function
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QGraphicsScene scene;
myImage img;
scene.addItem(&img);
QGraphicsView view(&scene);
QWidget window;
window.setFixedHeight(400);
window.setFixedWidth(500);
window.setSizePolicy(QSizePolicy::Fixed,QSizePolicy::Fixed);
QPushButton button("Quit");
QObject::connect(&button,SIGNAL(clicked()),&app,SLOT(quit()));
QVBoxLayout layout;
layout.addWidget(&view);
layout.addWidget(&button);
window.setLayout(&layout);
window.show();
return app.exec();
}

Answer 1

The problem here is that you're using a jpeg image, which isn't native to Qt. In the installation of Qt you'll find a plugins folder with a folder called "imageformats". If you copy the folder of libraries to the path of the executable (assuming Windows), then this should work. A similar discussion is here.
Alternatively, use a different image format to jpeg.