Custum QGraphicsItem not call the paint method

[anda_skoa]

I tried to move my code on a private slot that is called when a button is pressed:

How would that help?

So the paint method is not called..

The item is still destroyed right away.

Cheers,
_

[Nosba]

I finally realized.

qDebug() << ui->graphicsView->size();
 
    this->map = new Mercator_graphics_item(ui->graphicsView->size());
 
    qDebug() << map;
 
    ui->graphicsView->update();
 
    draw_scene->addItem(map);
    draw_scene->update();
    ui->graphicsView->setScene(draw_scene);

qDebug() << ui->graphicsView->size();

    this->map = new Mercator_graphics_item(ui->graphicsView->size());

    qDebug() << map;

    ui->graphicsView->update();

    draw_scene->addItem(map);
    draw_scene->update();
    ui->graphicsView->setScene(draw_scene);

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the pointer map is declared in the header file...

Using the new operand I allocate the map object in the Heap so it is not destroyed at the and of the slot's stack.

Am I right or it works only by chance?

[anda_skoa]

Am I right or it works only by chance?

Yes, you are right.

The problem was the really short life time of the item due to stack allocation.

Cheers,
_