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List:       pykde
Subject:    Re: [PyQt] Bug with QGraphicsTextItem in pagedesigner.pyw (Mark
From:       Mark Summerfield <mark () qtrac ! eu>
Date:       2008-03-25 9:15:28
Message-ID: 200803250915.28470.mark () qtrac ! eu
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On 2008-03-23, alteo_gange wrote:
> Hi, all.
>
> Why the Mark Summerfield's script, pyqt/chap12/pagedesigner.pyw which is an
> file example of his book  «Rapid Gui Programming With Python and Qt », bugs
> when i try to delete, rotate, copy, or cut any text (in fact
> QGraphicsTextItem)?
>
> example:
> Button  «Add Text » >> enter text in the QTextEdit() of QDialog() >> Button
>  «Ok »
>
> >> Button  «Delete » >>  «Delete 1 item? » >> Button  «Yes » >> BUG! >>
>
>  «QGraphicsScene::removeItem: item 0x85baa90's scene ((nil)) is different
> from this scene (0x8324f10)
> Erreur de segmentation (core dumped) »
>
> other example:
> Button  «Add Pixmap » >> select image >> Button  «Open » >> Button  «Delete » >>
> No Problem
>
> Why there is a bug with texts and not with images?
> Yet texts and images are both provided to QGraphicsScene with respectively
> QGraphicsTextItem and QGraphicsPixmapItem which inherit of QGraphicsItem.
> Moreover, in theory, QGraphicsScene.removeItem(QGraphicsItem * item )
> can  «removes the item item and all its children from the scene » (and
>  «Delete » Button uses this method).
>
> I don't understand. Have you an idea?

This example works fine for me and I tested it on Linux (Fedora +
Kubuntu), Windows XP, and Mac OS X.

Which versions of PyQt, Qt, and Python are you using? What operating
system are you using? As I mention at the beginning of chapter 12, this
example needs PyQt 4.1 (ideally PyQt 4.2) or later and Qt 4.2 or later.

-- 
Mark Summerfield, Qtrac Ltd., www.qtrac.eu



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