Having trouble with QGraphicsView

[mrwooster]

I am having trouble displaying an image (or anything) in a QGraphicsView

I have a frame named mainwindow which contains simply a QGraphicsView widget named mainGraphics

I have an image named imageMap.bmp which I have added to the resource file

When I run the program, the QGraphicsView mainGraphics is blank.... just a white space in the frame..... if I change the setSceneRect param, the scrollable area does change size, so I am def changing parameters on the correct item, but just none of the graphics will show up...???

The code in mainwindow.cpp is as follows:

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtGui>
 
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    ui->mainGraphics->setSceneRect(0,0,500,500);
    QPixmap back(":/images/imageMap.bmp");
    ui->mainGraphics->setBackgroundBrush(back);
 
 
    QGraphicsScene scene;
    scene.addText("Some text");
    scene.addLine(10,10,200,200);
 
    ui->mainGraphics->setScene(&scene);
    ui->mainGraphics->show();
 
 
 
 
}
 
MainWindow::~MainWindow()
{
    delete ui;
}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtGui>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    ui->mainGraphics->setSceneRect(0,0,500,500);
    QPixmap back(":/images/imageMap.bmp");
    ui->mainGraphics->setBackgroundBrush(back);


    QGraphicsScene scene;
    scene.addText("Some text");
    scene.addLine(10,10,200,200);

    ui->mainGraphics->setScene(&scene);
    ui->mainGraphics->show();




}

MainWindow::~MainWindow()
{
    delete ui;
}

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a file named main.cpp contains the main() function which starts the program