Platform:
Win32 PyQt4.3.0-GPL with Qt-4.3.1-opensource, Python 2.5
Symptoms:
QTableWiget sort by a long string column, after remove some rows,
then sort again will deak lock or crashed. Sometimes can got a msg
from console:
"Qt has caught an exception thrown from an event handler. Throwing
exceptions from an event handler is not supported in Qt. You must
reimplement QApplication::notify() and catch all exceptions there."
Test Program:
see attachment: testTbw.py
Usage:
run testTbw.py and click some cell wait a while program will crashed.
Maybe it's caused by a GC problem or TableWidget's model r/w competition.
Anyone can help me find root cause and how to fix it?
--
I'm the one, powered by nEO
#!/usr/bin/env python
#coding=utf-8
import sys
from random import randint
from PyQt4.QtGui import QTableWidget,QMainWindow,QWidget,QApplication
from PyQt4.QtGui import QVBoxLayout, QPushButton
from PyQt4.QtCore import QTimer, SIGNAL, QModelIndex, QVariant, Qt
def genLongString():
longString = ''
#gen a 128 chars string
for i in range(128):
randAscii = chr(randint(64, 122))
longString += randAscii
return longString
class mainWindow(QMainWindow):
def __init__(self, parent = None):
QMainWindow.__init__(self, parent)
self.centralWidget = QWidget()
self.setCentralWidget(self.centralWidget)
layout = QVBoxLayout()
self.addTimer = QTimer()
self.delTimer = QTimer()
self.table = QTableWidget(self.centralWidget)
self.setupTable()
self.btn_remove = QPushButton("&Remove", self.centralWidget)
layout.addWidget(self.table)
layout.addWidget(self.btn_remove)
self.connect(self.btn_remove, SIGNAL("clicked()"), self.removeRows)
self.connect(self.addTimer, SIGNAL("timeout()"), self.insertRows)
self.connect(self.delTimer, SIGNAL("timeout()"), self.removeRows)
self.resize(300, 300)
self.centralWidget.setLayout(layout)
def setupTable(self):
#self.table.setRowCount(1)
self.table.setColumnCount(7)
self.table.hideColumn(5)
self.table.sortByColumn(6)
self.table.resizeColumnsToContents()
self.table.resizeRowsToContents()
def insertRows(self):
model = self.table.model()
self.table.setSortingEnabled(False)
model.insertRows(0, 3)
for r in range(3):
for c in range(6):
s = "%s-%s" % (r,c)
idx = model.index(r, c, QModelIndex())
model.setData(idx, QVariant(s), Qt.DisplayRole)
#Fill col 7 with a long string
longString = genLongString()
idx = model.index(r, 6)
model.setData(idx, QVariant(longString), Qt.DisplayRole)
self.table.setSortingEnabled(True)
self.table.resizeColumnsToContents()
self.table.resizeRowsToContents()
self.table.sortByColumn(6)
def removeRows(self):
row = self.table.currentRow()
if row == -1:
print "Please click any cell for select a row to be remove."
print "remove row:",row
self.table.removeRow(row)
app = QApplication(sys.argv)
main = mainWindow()
main.show()
main.insertRows()
# If uncoment below line, will cause a dead loop, seem a bug too.
#main.table.setCurrentCell(1,2)
main.addTimer.start(1*1000)
main.delTimer.start(1*1100)
app.exec_()
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