Re: Custom grid cell editor: GridCellComboBoxEditor

The problem disappears if comment out the following lines in the Create 
method

        if evtHandler:
            self.control.PushEventHandler(evtHandler)

But then an error occurs when closing the window
Traceback (most recent call last):
  File "D:/project/designer/widgets/GridCellComboBoxEditor.py", line 87, in 
<module>
    app.MainLoop()
  File "C:\Python37-32\lib\site-packages\wx\core.py", line 2167, in MainLoop
    rv = wx.PyApp.MainLoop(self)
wx._core.wxAssertionError: C++ assertion "firstHandler != this" failed at 
..\..\src\common\wincmn.cpp(1461) in wxWindowBase::PopEventHandler(): 
cannot pop the wxWindow itself

Process finished with exit code 1

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