What OS, python version and PyQt version are you using? I'm running OSX10.8,
python 2.7 and PyQt 4.9.6 and I can't reproduce your error.
On 25 Dec 2012, at 12:46, "^_^Sisyphus^_^" <freesisyphusw...@gmail.com> wrote:
> Dear all,
>
> I create QCompleters for QLineEdit, which work fine if there is no
> dynamically defined function/method in the subclasses (try to run the script
> with ./bugCompleterFilesysModel.py n n in [0, 1, 2, 9], then try to bring up
> the completer by deleting some char in the LineEdit box). The QCompleter can
> work with QStringList, QStringListModel, and QFileSystemModel.
>
> If I add some dynamically defined function/method in the subclass with
> QCompleter of simple QStringList, the instances work fine too (try to run the
> script with ./bugCompleterFilesysModel.py n n in [10, 20, 30], then try to
> bring up the completer by deleting some char in the LineEdit box).
>
> However, if I defined any function/method dynamically, the QCompleter with
> any kind of data model, will raise an error during closing the GUI window:
>
>
> QObject::startTimer: QTimer can only be used with threads started with QThread
> Segmentation fault
>
> To repeat the error, try to run the script with ./bugCompleterFilesysModel.py
> mn m in [1,2,3], n in [1, 2, 9], then try to bring up the completer by
> deleting some char in the LineEdit box, then close the window.
>
> Can anyone tell my why is that and how to fix it? I have been scratching my
> head for hours.
>
> Thanks ahead!
>
> Full script of bugCompleterFilesysModel.py:
>
>
> #!/usr/bin/env python
> # -*- coding: UTF-8 -*-
> class MyBaseWidget(QtGui.QWidget):
> dirChanged=QtCore.pyqtSignal(QtCore.QString)
> def __init__(self,parent=None,addfunc0=False,*args,**kwargs):
> super(MyBaseWidget, self).__init__(parent)
> self.addfunc0=addfunc0
> self.func0=None
> self.dummyWgt=1
> self.initUI()
>
> def initUI(self,*args,**kwargs):
> addfunc0=self.addfunc0
> if addfunc0 == 1:
> self.func0=self.funcFactory0('1')
> _func0str="self.funcFactory0('1')"
> if addfunc0 == 2:
> self.func0=self.funcFactory1('1')
> _func0str="self.funcFactory1('1')"
> if addfunc0 == 3:
> self.func0=self.funcFactory1b()
> _func0str="self.funcFactory1b()"
>
> if addfunc0 > 0:
> #print self.printWgt
> print 'use %s as func0'%(_func0str)
> print 'self.func0 = %s'%(self.func0)
> self.func0()
>
> self.show()
>
> def printWgt(self,wgt0):
> print 'Input obj is:', wgt0.__class__.__name__
>
> def funcFactory0(self,wgt0):
> def _func():
> self.printWgt(wgt0)
> return _func
>
> def funcFactory1(self,wgt0):
> import types
> def _func(self):
> self.printWgt(wgt0)
> return types.MethodType(_func,self,mainWidget)
>
> def funcFactory1b(self):
> import types
> def _func(self):
> self.printWgt(self.dummyWgt)
> return types.MethodType(_func,self,mainWidget)
>
>
> class StringWidget(MyBaseWidget):
> dirChanged=QtCore.pyqtSignal(QtCore.QString)
> def initUI(self,*args,**kwargs):
> currdir=r'/tmp'
> self.currdir=currdir
> self._tb=[]
>
>
> completer=QtGui.QCompleter(QtCore.QStringList(['/tmp/'+i for i in
> 'abcdefg']), parent=self)
> completer.setMaxVisibleItems(5)
> self.completer=completer
>
> _tb=QtGui.QLineEdit(currdir)
> _tb.setCompleter(completer)
>
> theLayout=QtGui.QHBoxLayout(self)
> theLayout.addWidget(_tb)
> self._tb=_tb
>
> MyBaseWidget.initUI(self,*args,**kwargs)
>
> class StringModelWidget(MyBaseWidget):
> dirChanged=QtCore.pyqtSignal(QtCore.QString)
> def initUI(self,*args,**kwargs):
> currdir=r'/tmp'
> self.currdir=currdir
> self._tb=[]
>
> fsModel=QtGui.QStringListModel(['/tmp/'+i for i in 'abcdefg'])
> self.fsModel=fsModel
> #self.fsModel.setParent(self)
>
> completer=QtGui.QCompleter()
> completer.setMaxVisibleItems(5)
> completer.setModel(fsModel)
> self.fsModel.setParent(completer)
> self.completer=completer
>
> _tb=QtGui.QLineEdit(currdir)
> _tb.setCompleter(completer)
>
> theLayout=QtGui.QHBoxLayout(self)
> theLayout.addWidget(_tb)
> self._tb=_tb
>
> MyBaseWidget.initUI(self,*args,**kwargs)
>
>
>
> class FileModelWidget(MyBaseWidget):
> dirChanged=QtCore.pyqtSignal(QtCore.QString)
>
> def initUI(self,*args,**kwargs):
> currdir=r'/tmp'
> self.currdir=currdir
> self._tb=[]
>
> fsModel=QtGui.QFileSystemModel(parent=self)
> fsModel.setRootPath('')
> fsModel.setFilter(QtCore.QDir.AllDirs|QtCore.QDir.Dirs)
> self.fsModel=fsModel
> #self.fsModel.setParent(self)
>
> completer=QtGui.QCompleter(parent=self)
> completer.setMaxVisibleItems(5)
> completer.setModel(fsModel)
> self.fsModel.setParent(completer)
> self.completer=completer
>
> _tb=QtGui.QLineEdit(currdir)
> _tb.setCompleter(completer)
>
> theLayout=QtGui.QHBoxLayout(self)
> theLayout.addWidget(_tb)
> self._tb=_tb
>
> MyBaseWidget.initUI(self,*args,**kwargs)
>
>
> class mainWidget(MyBaseWidget):
>
> def initUI(self,*args,**kwargs):
>
> self.mainLayout=QtGui.QVBoxLayout(self)
> self.wgts=[]
>
> _wgt0=StringWidget(self)
> self.wgts.append(_wgt0)
>
> _wgt1=StringModelWidget(self)
> self.wgts.append(_wgt1)
>
>
> _wgt2=FileModelWidget()
> self.wgts.append(_wgt2)
>
>
> for _w in self.wgts:
> print _w
> self.mainLayout.addWidget(_w)
> MyBaseWidget.initUI(self,*args,**kwargs)
>
> def main():
> app = QtGui.QApplication(sys.argv)
> argv=sys.argv
> mainWgt = None
> if len(argv)>1:
> nwgt = int(sys.argv[1])
> _addfunc0=nwgt/10
> _nwgt=nwgt-_addfunc0*10
> print _nwgt,_addfunc0
> if _nwgt == 0:
> _MainWgt=StringWidget
>
>
> if _nwgt == 1:
> _MainWgt=StringModelWidget
>
> if _nwgt == 2:
> _MainWgt=FileModelWidget
>
> if _nwgt == 9:
> _MainWgt=mainWidget
> print 'use %s as main widget'%(_MainWgt.__name__)
> mainWgt=_MainWgt(addfunc0=_addfunc0)
> else:
> mainWgt = mainWidget(addfunc0=0)
>
>
>
> if mainWgt:
> sys.exit(app.exec_())
>
> if __name__ == '__main__':
> main()
>
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