On Oct 19, 2:29 pm, David Boddie <da...@boddie.org.uk> wrote: > On Monday 18 October 2010 23:26, Andrew wrote: > > > I have two issues dealing with the table widget, though they may be > > interconnected. I'm not sure. Both delete the cell widgets off of my > > table but leave the rows, and then when I have the table update, it > > complains the c++ object has been deleted. > > > # self.tableData.setCellWidget(rowCount, 0, trackItem) > > # RuntimeError: underlying C/C++ object has been deleted > > This is because you pass your widgets to this method and later ask > the table to clear the contents of the table. When it does so, it > deletes the underlying widgets, leaving only Python wrappers. > > The documentation mentions that the table takes ownership of the > widget: > > http://www.riverbankcomputing.co.uk/static/Docs/PyQt4/html/qtablewidg... > > I had read that, but I did not fully understand what that actually was supposed to mean. like a 'Ok it has ownership, good for it?' I hadn't run into such a problem before either in any form. Now I know.
> > > I have a list of a custom widget class that keeps track of several > > directories. Each class gets put into a row on the table. I have a set > > of radio buttons that will show me different views of the data: All, > > New, Done, Errors, Warnings. > > When I switch views, I clear my table, set the row count to 0, and > > then add back in only the widgets I want to see. > > > Error 1: > > I load in the data initially, and then repopulate the table, and then > > re-size the window, instantly all listed rows are cleared, but the > > rows stay. This only happened on the diagonal re-size (bottom left > > corner); not the up and down, or side to side re-size. Attempting to > > repopulate the table, resulted in: underlying C/C++ object has been > > deleted. Though it will put in the correct number of rows required. > > > Everything worked fine as long as I did not re-size the window. > > This may only be a symptom of the behaviour and not a guarantee that > the code was working correctly up until the point when the resize > occurred. > > > Error 2: > > I load in the data initially, and then repopulate the table, the table > > clears and then nothing happens. No error messages or even visible > > rows. After several more repopulates it with either crash or tell me: > > underlying C/C++ object has been deleted. > > > I had error 1 two days ago, then without changing the code, I now get > > error 2. I do not have to re-size the window for it to break now. > > I recommend that you create a list of non-widget data structures in > your parsePath() method and create widgets on the fly in your addToTable() > method. If you need to retain information when you repopulate the table > then update the data structures that correspond to the widgets just before > you clear the table. > > David Thanks, it does work now that I've split it into a data and widget class and create the widgets on the fly. Thanks for the help and sorry for the delayed response. Andrew -- http://mail.python.org/mailman/listinfo/python-list
