[PyQt] How to subclass a QTreeWidget?

[Phil Thompson]

On Thursday 07 June 2007 2:07 am, Karlo Lozovina wrote:
> Hello everyone,
>
> I'm trying here to subclass a QTreeWidget so I can implement some
> custom methods for displaying and modifying data. In the wxPython
> world approach similar to this worked for me, but now I'm getting an
> error.
>
> Here is the part where I initialize my custom QTreeWidget:
>
> ---------
> self.mainControls = QtGui.QTabWidget(self.centralWidget)
> self.mainControls.setObjectName("mainControls")
>
> self.tabSongs = QtGui.QWidget()
> self.tabSongs.setObjectName("tabSongs")
>
> self.hboxlaySongs = QtGui.QHBoxLayout(self.tabSongs)
> self.hboxlaySongs.setMargin(3)
> self.hboxlaySongs.setSpacing(3)
> self.hboxlaySongs.setObjectName("hboxlaySongs")
>
> self.songsTreeView = SongsTreeView(self.tabSongs)
> self.songsTreeView.setObjectName("songsTreeView")
> self.hboxlaySongs.addWidget(self.songsTreeView)
>
> self.mainControls.addTab(self.tabSongs, "Glazba")
> ---------
>
> And this is the code for the SongsTreeView object:
>
> ---------
> class SongsTreeView(QtGui.QTreeWidget):
>     def __init__(self, parent):
>         QtGui.QTreeWidget.__init__(parent)
> ---------
>
> When I try to run the code I get the following mistake:
>
> ---------
> Traceback (most recent call last):
>   File "MBoss.py", line 54, in <module>
>     boss_app = BossApp()
>   File "MBoss.py", line 42, in __init__
>     self.ui = BossMainWindow(self)
>   File "/home/mosor/projects/mediatouch/mtouch/mboss/BossMainWindow.py",
> line 33, in __init__
>     self._initGui()
>   File "/home/mosor/projects/mediatouch/mtouch/mboss/BossMainWindow.py",
> line 61, in _initGui
>     self.songsTreeView.setObjectName("songsTreeView")
> RuntimeError: underlying C/C++ object has been deleted
> [1]    25619 segmentation fault  python MBoss.py
> ---------
>
> Now, what am I doing wrong :)? Is there another way to subclass a
> QTreeWidget and customize it to my needs?
> Any help greatly appreciated.

Nothing to do with PyQt - you haven't passed self to QTreeWidget.__init__().

Phil