Core PyQt4

sto iniziando con PyQt4 e sto affrontando una coredump quando si utilizza QGraphicsScene/Vista nel più semplice degli esempi:Core PyQt4

#!/usr/bin/python 

import sys 
from PyQt4.QtCore import * 
from PyQt4.QtGui import * 

app = QApplication(sys.argv) 

grview = QGraphicsView() 
scene = QGraphicsScene() 
grview.setScene(scene) 

grview.show() 

sys.exit(app.exec_())

il programma viene eseguito, ma quando lo si chiude dà tonnellate di GTK errori (utilizzando Ubuntu) e, infine, il core dump (errore di segmentazione):

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_container_add: assertion `GTK_IS_CONTAINER (container)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 

(python:2732): Gtk-CRITICAL **: IA__gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed 
Violación de segmento (`core' generado)

suppongo che questo ha qualcosa a che fare con il mio setup linux. Qualcuno ha affrontato questo prima?

Grazie!

fonte

2013-08-24 victor

Gli errori GTK sono probabilmente non correlati al segfault. Sto usando KDE (e quindi non il tema gtk), quindi non vedo errori GTK, ma ottengo un segfault.

Il segfault accade nel distruttore della QGraphicsScene:

#0 0x00007ffff6f09037 in raise() from /lib/x86_64-linux-gnu/libc.so.6 
#1 0x00007ffff6f0c698 in abort() from /lib/x86_64-linux-gnu/libc.so.6 
#2 0x00007ffff5b465c2 in qt_message_output(QtMsgType, char const*)() from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 
#3 0x00007ffff5b46938 in ??() from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 
#4 0x00007ffff5b46ac4 in qFatal(char const*, ...)() from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 
#5 0x00007ffff389231e in ??() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 
#6 0x00007ffff3893401 in QPixmap::QPixmap()() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 
#7 0x00007fffea0a8c86 in Oxygen::Helper::Helper(QByteArray const&)() from /usr/lib/liboxygenstyle.so.4 
#8 0x00007fffea3450e0 in ??() from /usr/lib/kde4/plugins/styles/oxygen.so 
#9 0x00007fffea32f757 in ??() from /usr/lib/kde4/plugins/styles/oxygen.so 
#10 0x00007fffea33c7bc in ??() from /usr/lib/kde4/plugins/styles/oxygen.so 
#11 0x00007ffff3ab64e6 in QStyleFactory::create(QString const&)() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 
#12 0x00007ffff37c74cf in QApplication::style()() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 
#13 0x00007ffff37fe488 in QWidget::isActiveWindow() const() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 
#14 0x00007ffff3dd5ccc in QGraphicsView::setScene(QGraphicsScene*)() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 
#15 0x00007ffff3da47d1 in QGraphicsScene::~QGraphicsScene()() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 
#16 0x00007ffff46b6bb9 in ??() from /usr/lib/python2.7/dist-packages/PyQt4/QtGui.so 
#17 0x00007ffff46b4ad6 in ??() from /usr/lib/python2.7/dist-packages/PyQt4/QtGui.so 
#18 0x00007ffff4c6115e in ??() from /usr/lib/python2.7/dist-packages/sip.so 
#19 0x00007ffff4c62aa9 in ??() from /usr/lib/python2.7/dist-packages/sip.so 
#20 0x00000000004af4f0 in ??() 
#21 0x00000000004dbbc7 in ??() 
#22 0x00007ffff4c6058b in ??() from /usr/lib/python2.7/dist-packages/sip.so 
#23 0x00007ffff4c62a22 in ??() from /usr/lib/python2.7/dist-packages/sip.so 
#24 0x00007ffff4c62ab1 in ??() from /usr/lib/python2.7/dist-packages/sip.so 
#25 0x00000000004af4f0 in ??() 
#26 0x00000000004b8bca in ??() 
#27 0x00000000004a4460 in PyDict_SetItem() 
#28 0x00000000004a46d7 in _PyModule_Clear() 
#29 0x0000000000509514 in PyImport_Cleanup() 
#30 0x0000000000423bca in Py_Finalize() 
#31 0x0000000000424470 in Py_Exit() 
#32 0x00000000004245ac in ??() 
#33 0x000000000042254e in PyErr_PrintEx() 
#34 0x0000000000465e0d in PyRun_SimpleFileExFlags() 
#35 0x0000000000466b78 in Py_Main() 
#36 0x00007ffff6ef3ea5 in __libc_start_main() from /lib/x86_64-linux-gnu/libc.so.6 
#37 0x00000000004e0d95 in _start()

Fare grview il genitore di scene dovrebbe risolvere questo problema:

#!/usr/bin/python 

import sys 
from PyQt4.QtCore import * 
from PyQt4.QtGui import * 

app = QApplication(sys.argv) 

grview = QGraphicsView() 
scene = QGraphicsScene(grview) 

grview.setScene(scene) 

grview.show() 

sys.exit(app.exec_())

QObject s costruite senza genitori sono owned by PyQt and not by Qt, questo errore è probabilmente a causa del fatto che il distruttore viene chiamato due volte quando esce.

fonte

2013-08-24 09:05:49 mata

Ha funzionato. Ma non capisco perché stava fallendo. Perché la chiamata setScene non è sufficiente? Ad ogni modo, buona risposta. Lo accetto e chiudo la domanda. Grazie! – victor

Posso solo ipotizzare che il distruttore venga chiamato sul lato Qt quando il QGraphicsView è distrutto, e che sia anche chiamato da PyQt quando 'scene' è [garbage collected] (http://pyqt.sourceforge.net/Docs/ PyQt4/getchas.html # garbage-collection) - ma non posso davvero dire cosa succede prima. – mata

L'ultima frase dovrebbe probabilmente leggere "QObject costruito con parent è di proprietà di Qt invece di PyQt", poiché [doc] (http://pyqt.sourceforge.net/Docs/PyQt4/qobject.html#QObject) afferma "Il l'argomento principale, se _not_ None, fa sì che il sé sia di proprietà di Qt invece di PyQt "? – ederag

risposta

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