[Tutor] underlying C/C++ object has been deleted

[Lawrence Shafer]

Here's the whole code. Any help appreciated!

http://shaferlabs.pastebin.com/m32c82193

Also I was thinking I could set the progressbar to 64% like this.
self.progressBar.setProperty("value",QtCore.QVariant(64))
but it doesn't work. (AttributeError: progressBar) I think it has 
something to do with some stupid way I'm initializing the iac_ui.py 
file. Like I said, I'm not used to QTDesigner and complex programs like 
this. Again, any help appreciated!

Lawrence Shafer wrote:
> I am trying to convert a program with hand coded QT over to using UI 
> files from QT Designer. I am getting the error below and do not 
> understand what's going on. I have a feeling I need to add self. to 
> something in here, but I'm not sure what. Is this enough code for you to 
> see whats going on?? If not I can upload the project somewhere.  Thanks, 
> Lawrence
>
> The error,
>
> Traceback (most recent call last):
>   File "atf.py", line 113, in on_actionOpen_triggered
>     self.open()
>   File "atf.py", line 56, in open
>     if self.isUntitled and self.textBrowser.document().isEmpty() and not 
> self.isWindowModified():
> RuntimeError: underlying C/C++ object has been deleted
>
>
> Here is the first part of the code.
>
> #!/usr/bin/env python
> # iaC.py - A Qt4 Calculator example
>
> import sys
> from math import pi
> from PyQt4 import QtCore, QtGui
> from iac_ui import Ui_mainWindow
> from filterEdit2_ui import Ui_filterEdit
>
>
> class iaC(QtGui.QMainWindow):
>     sequenceNumber = 1
>     windowList = []
>
>     @QtCore.pyqtSignature("")
>     def __init__(self, fileName=None, parent=None):
>         QtGui.QMainWindow.__init__(self, parent)
>
>         self.init()
>         if fileName:
>             self.loadFile(fileName)
>         else:
>             self.setCurrentFile(QtCore.QString())
>
>         self.ui = Ui_mainWindow()
>         self.ui.setupUi(self)
>
> # ================Set up delete, up, and down buttons on the main 
> form==================
>         if self.ui.listWidget.count() < 1:
>             self.ui.deleteButton.setEnabled(False)
>         else:
>             self.ui.deleteButton.setEnabled(True)
>
>         if self.ui.listWidget.count() < 2:
>             self.ui.upButton.setEnabled(False)
>             self.ui.downButton.setEnabled(False)
>         else:
>             self.ui.downButton.setEnabled(True)
>             self.ui.upButton.setEnabled(True)
>
> # ================Save settings on 
> close?=======================================
>     def closeEvent(self, event):
>         if self.maybeSave():
>             self.writeSettings()
>             event.accept()
>         else:
>             event.ignore()
>
> # ===============Open File=================================================
>     @QtCore.pyqtSignature("")
>     def open(self):
>         fileName = QtGui.QFileDialog.getOpenFileName(self)
>         print "Loading fileName", fileName
>         if not fileName.isEmpty():
>
>             if self.isUntitled and self.textBrowser.document().isEmpty() 
> and not self.isWindowModified():
>                 self.loadFile(fileName)
>             else:
>                 other = MainWindow(fileName)
>                 if other.isUntitled:
>                     del other
>                     return
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