Rdzeń z PyQt4

Zaczynam z PyQt4 i jestem w obliczu Coredump podczas korzystania QGraphicsScene/Widok w najprostszy z przykładów:Rdzeń z 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_())

Program działa, ale podczas zamykania go daje mnóstwo błędów GTK (Ubuntu) i wreszcie zrzutu pamięci (błąd segmentacja):

(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)

Zakładam ma to coś wspólnego z moim konfiguracji Linuksa. Ktoś przed tym stanął?

Dzięki!

Źródło

2013-08-24 victor

Błędy GTK prawdopodobnie nie są powiązane z błędem segfault. Używam KDE (a więc nie motywu gtk), więc nie widzę żadnych błędów GTK, ale otrzymuję błąd segfault.

segfault dzieje się w destructor na 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()

Making grview rodzicem scene powinno rozwiązać ten problem:

#!/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 zbudowane bez rodzica są owned by PyQt and not by Qt, błąd ten jest prawdopodobnie wynik destruktora wywołanego dwukrotnie przy wychodzeniu.

Źródło

2013-08-24 09:05:49 mata

Zadziałało. Ale nie rozumiem, dlaczego to się nie udawało. Dlaczego wywołanie setScene nie jest wystarczające? W każdym razie dobra odpowiedź. Akceptuję to i kończę pytanie. Dzięki! – victor

Mogę tylko spekulować, że destruktor jest wywoływany po stronie Qt, gdy QGraphicsView jest niszczony, i że jest on również wywoływany przez PyQt, gdy 'scene' jest [garbage collected] (http://pyqt.sourceforge.net/Docs/ PyQt4/gotchas.html # garbage-collection) - ale nie mogę powiedzieć, co się dzieje najpierw. – mata

Ostatnie zdanie powinno prawdopodobnie brzmieć "QObject skonstruowany _with_ parent jest własnością Qt zamiast PyQt", ponieważ [doc] (http://pyqt.sourceforge.net/Docs/PyQt4/qobject.html#QObject) stwierdza: Argument macierzysty, jeśli _nie_ Brak, powoduje, że własność jest własnością Qt zamiast PyQt "? – ederag

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