QPainter::rotate problem in QGraphicsItem

[alizadeh91]

When i draw a pixmap in QGraphicsItem by painter and then rotate it, it won't erase previous state ! :S

there is an attachment.(there is dial i want to rotate needle but you see what happens!)Screenshot-1.jpg

[wysota]

Show us your code please.

[Aruz]

I have same problem. How can I rotate a widget which on another widget? This is my code:

..    
    QGraphicsScene *scene = new QGraphicsScene(ui->gemiSekme);
    QGraphicsItem *item = new QGraphicsItem(ui->label_2);
    item->rotate(45);
    scene->addItem(item);
    ui->graphicsView->setScene(scene);

..    
    QGraphicsScene *scene = new QGraphicsScene(ui->gemiSekme);
    QGraphicsItem *item = new QGraphicsItem(ui->label_2);
    item->rotate(45);
    scene->addItem(item);
    ui->graphicsView->setScene(scene);

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I get this error:

error: cannot allocate an object of abstract type 'QGraphicsItem'

error: cannot allocate an object of abstract type 'QGraphicsItem'

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Also I tried this code, does not run.

.. 
    QGraphicsScene scene;
    QGraphicsProxyWidget *proxy =  scene.addWidget(ui->label_2);
    proxy->rotate(20);
    ui->graphicsView->setScene( &scene);
    ui->graphicsView->show();

.. 
    QGraphicsScene scene;
    QGraphicsProxyWidget *proxy =  scene.addWidget(ui->label_2);
    proxy->rotate(20);
    ui->graphicsView->setScene( &scene);
    ui->graphicsView->show();

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Thanks for your time.