Displaying a Pixmap on a Graphics View Widget

[Brazzoni]

In the code below I am trying to display a diagonal line on a Graphics View widget that I have already dropped onto a form in the Qt Creator. I am having trouble getting the .cpp form to actually know of the existence of my Graphics View Widget. It seems as though view.show(); just shows a ambiguous GraphicView Object. I have tried using the same name for my GraphicView widget on the form in the code (PixmapView) instead of view, but .cpp does not know of it's existence. Is there a way to render this? An onCreate signal would be great but I don't believe this exists.

//CanvasTest::CanvasTest(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::CanvasTest)
{
    ui->setupUi(this);
   
    QPixmap pm(200,200);
    QPainter pmp(&pm);
    pmp.setPen(Qt::black);
    int counter = 0;
    while (counter < 200)
    {
        pmp.drawPoint(counter,counter);
        counter++;
    } 
  


    pmp.end();
    QGraphicsScene scene;
    QGraphicsPixmapItem item(pm);
    scene.addItem(&item);
    QGraphicsView view(&scene);
    view.show();

[Brazzoni]

should the Qt Creator generated #include <ui_Canvastest.h> allow me to access objects in the canvas_ui form code sheet? I can see that there is an object of type Graphics View named PixMapView (what I named my widget/object as) in the canvas_ui form code. Is there a way to access this object in the .cpp code?

[SGaist]

Hi and welcome to devnet,

Since your widgett is called PixmapView then in your CanvaTest class you can use ui->PixmapView ..