Can't manually update QGraphicsScene

[wysota]

We'd have to see the bigger picture. It is likely you are drawing outside boundingRects of your items or something like that.

[aladagemre]

Hmm,

I tried self.view.fitInView(self.scene.itemsBoundingRect() ,Qt.KeepAspectRatio) but it also didn't work.

I don't know if you'd mind looking at the big picture but here is the complete code:
(unfortunately I'm using some other lib for data import. The Scene/View and MainWindow implementations are at the bottom. Top classes are not important)

http://pastebin.com/m264f6728

[wysota]

It would be best to isolate the problem using a minimal compilable example.

[aladagemre]

Oopps, I'm a bit dizzy late at night. I've produced a minimal example and figured out that the problem is with the line:

self.setCacheMode(QGraphicsView.CacheBackground)

self.setCacheMode(QGraphicsView.CacheBackground)

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Removing it solved the problem. I just tought it could speed up the performance of drawing grid.

Thank you for your help.