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List:       pykde
Subject:    Re: [PyQt] QTextLayout.createLine crashes
From:       Jérôme_Laheurte <jerome () jeromelaheurte ! net>
Date:       2017-03-27 16:12:24
Message-ID: 187A0729-10A9-4D9C-A719-2E1C8E80E176 () jeromelaheurte ! net
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> Le 27 mars 2017 à 17:45, David Boddie <david@boddie.org.uk> a écrit :
> 
> On Mon Mar 27 10:11:55 BST 2017, Jérôme Laheurte wrote:
> 
> > Hello. This smells like a bug; I was  « porting  » the ElidedLabel sample
> > when I stumbled upon it. The following code crashes with a SIGSEGV in
> > createLine() (Qt/PyQt 5.8.1, mac OS 10.11.6):
> > 
> > 
> > from PyQt5 import QtWidgets, QtGui
> > 
> > 
> > class TestWidget(QtWidgets.QWidget):
> > def paintEvent(self, event):
> > painter = QtGui.QPainter(self)
> > layout = QtGui.QTextLayout('spam', painter.font())
> > line = layout.createLine()
> 
> You need to call layout.beginLayout() before calling createLine(), then call
> endLayout() when you have finished. It's the same in PyQt4.

Ahah, that will teach me to dumbly convert hastily read C++ code to Python without \
knowing what I'm doing. Thanks.

Best regards
Jérôme Laheurte


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