PyQt QWidget in QAbstractListModel gets deleted with QSortFilterProxyModel -

i need populate listview widgets, have custom proxyfilter work it. without filter works great, when active seems delete widgets attach model.

it shows fine showing items, filtering works when erasing filter, when hidden widgets should shown again following error gets thrown:

custom_widget.setgeometry(option.rect) runtimeerror: underlying c/c++ object has been deleted

tried not using qvariant , going internalpointer route breaks @ same spot.

thanks having look!

setup:

def __init__(self, *args):      qtgui.qwidget.__init__(self, *args)       # create temp data     self.list_data = []     x in xrange(500):         widget = listitemwidget(text=str(x), parent=self)         self.list_data.append((str(x), widget)) # testing put in inmut tuple      # create listviewmodel     self.lm = listviewmodel(parent=self)      # create listview widget     self.lv = qtgui.qlistview()      # create filter proxy          self.proxy_model = listviewfilterproxymodel()     self.proxy_model.setfilterpattern('')     self.proxy_model.setsourcemodel(self.lm)      # set model of listview filter proxy     self.lv.setmodel(self.proxy_model)      # set delegate column 0     self.lv.setitemdelegateforcolumn(0, customwidgetdelegate(self.lv))      self.lm.updatedata(self.list_data)     self.proxy_model.invalidate()      self.connect(self.filter_edit, qtcore.signal("textchanged(qstring)"), self.update_filter)      def update_filter(self, pattern):         self.proxy_model.setfilterpattern(pattern)         self.proxy_model.invalidate() 

custom widget

class listitemwidget(qtgui.qwidget):     def __init__(self, text=none, parent=none):         qtgui.qwidget.__init__(self)               self.text = text      @qtcore.pyqtproperty(qtcore.qstring)     def text(self):         return self.__text      @text.setter     def text(self, value):         self.__text = value 

delegate painting view

    class customwidgetdelegate(qtgui.qitemdelegate):         def __init__(self, parent=none):             super(customwidgetdelegate, self).__init__(parent)          def paint(self, painter, option, index):                custom_widget = index.model().data(index, qtcore.qt.displayrole).topyobject()[1] >>>>>>      custom_widget.setgeometry(option.rect)             if not self.parent().indexwidget(index):                 self.parent().setindexwidget(index, custom_widget) 

list view model:

class listviewmodel(qtcore.qabstractlistmodel):      def __init__(self, parent=none, *args):          qtcore.qabstractlistmodel.__init__(self, parent, *args)         self.listdata = []      def rowcount(self, parent=qtcore.qmodelindex()):          return len(self.listdata)       def data(self, index, role):          if role == qtcore.qt.sizehintrole:             return qtcore.qsize(80, 80)         if index.isvalid() , role == qtcore.qt.displayrole:             return qtcore.qvariant(self.listdata[index.row()]).topyobject()         return qtcore.qvariant()          def updatedata(self, listdata):         self.listdata = listdata         index = len(self.listdata)         return true 

finally filter proxy model:

class listviewfilterproxymodel(qtgui.qsortfilterproxymodel):     def __init__(self, parent=none):         self.filter_str = none         qtgui.qsortfilterproxymodel.__init__(self, parent)      def setfilterpattern(self, pattern):         self.filter_str = qtcore.qstring(pattern)      def filteracceptsrow(self, sourcerow, sourceparent):         if self.filter_str none:             return true         index = self.sourcemodel().index(sourcerow, 0, sourceparent)           # testing on str here...         text = index.data().topyobject()[0]         if not str(self.filter_str) in text:             return false         return true