PDFgui Linux/anaconda/wxpython-3 Bug & Patch

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Sep 30, 2015, 11:38:39 AM9/30/15
to diffp...@googlegroups.com
I tried running pdfgui under anaconda python on Linux with wxpython- and encountered the following bug when I try to run the pdfgui executable in the bin directory:
File "/scratch/tmp/diffpy/lib/python2.7/site-packages/diffpy.pdfgui-1.0_r6798_20120508-py2.7.egg/diffpy/pdfgui/gui/serverpanel.py", line 115, in __do_layout
hostGridSizer.Add((1, 1), 0, wx.EXPAND|wx.ADJUST_MINSIZE, 0)
File "/dls_sw/apps/python/anaconda/1.7.0/64/lib/python2.7/site-packages/wx-3.0-gtk2/wx/_core.py", line 14456, in Add
return _core_.Sizer_Add(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "Assert failure" failed at ./src/common/sizer.cpp(1401) in DoInsert(): too many items (5 > 2*2) in grid sizer (maybe you should omit the number of either rows or columns?)

It looks like adding a 5th item to hostGridSizer fails in wxpython 3+ (according to google!). I found the following solution, which seems to at least allow the program to start:
hostGridSizer = wx.GridSizer(2, 2, 0, 0) --> hostGridSizer = wx.GridSizer(0, 2, 0, 0)

GridSizer is also used in temperatureseriespanel.py, preferencespanel.py and dopingseriespanel.py.
- temperatureseriespanel.py should be OK as it expects 1x2 items and has 2 in it.
- preferencespanel.py should be OK as it expects 3x3 items and has 9 in it
- dopingseriespanel.py should be OK as it expects 1x2 items and has 2 in it.

Please find attached a suggested patch for serverpanel.py which should solve this bug (though i haven't tested extensively...).


Dr Michael Wharmby,
PDRA, I15-1

Tel.: +44(0)1235 77 8327
Email: michael...@diamond.ac.uk

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