Re: AUI error: any pushed event handlers must have been removed

I had the same problem with 4.0.X versions. The solution is the following 
(quoting an old mail from Robin):

---

The assertion happens because the C++ wxAuiManager::SetManagedWindow does 
this:


m_frame->PushEventHandler(this);

but there is no corresponding PopEventHandler in the AUI code.

You can probably avoid the assertion by adding a EVT_CLOSE handler for the 
Frame passed to SetManagedWindow that does something like this:


self.PopEventHandler(True)
event.Skip() 


If something besides a Frame is the managed window then you’ll need to 
adapt to that configuration.
---

El domingo, 19 de abril de 2020, 19:21:18 (UTC-3), Al Goor escribió:
>
> I'm trying to work with AUI and keep getting the following error...
>
> wx._core.wxAssertionError: C++ assertion "GetEventHandler() == this" 
> failed at 
> /usr/local/miniconda/conda-bld/wxpython_1585592756259/work/ext/wxWidgets/src/common/wincmn.cpp(478) 
>
> in ~wxWindowBase(): any pushed event handlers must have been removed
>
> I've reduced my code down to a simple program that reproduces the error 
> (below).  Please note that the "MyFrame" definition is auto-generated by 
> wxFormBuilder, so I'm only supposed to modify that through subclasses.
>
> I've found references to this error on the internet, but none of the 
> solutions seem to match my case.
>
> Where am I going wrong?
>
> Thanks,
> Eric
>
> import wx
> import wx.xrc
> import wx.aui
>
>
> # Code for the frame was auto-generated by wxFormBuilder
>
> class MyFrame1(wx.Frame):
>
>     def __init__(self, parent):
>         wx.Frame.__init__(self, parent, id=wx.ID_ANY, title=wx.EmptyString
> , pos=wx.DefaultPosition,
>                           size=wx.Size(870, 700), style=wx.DEFAULT_FRAME_STYLE 
> | wx.TAB_TRAVERSAL)
>
>         self.SetSizeHints(wx.DefaultSize, wx.DefaultSize)
>         self.m_mgr = wx.aui.AuiManager()
>         self.m_mgr.SetManagedWindow(self)
>         self.m_mgr.SetFlags(wx.aui.AUI_MGR_DEFAULT)
>
>         self.m_mgr.Update()
>         self.Centre(wx.BOTH)
>
>     def __del__(self):
>         self.m_mgr.UnInit()
>
>
> class MyApp(wx.App):
>
>     def OnInit(self):
>         self.frame = MyFrame1(None)
>         self.SetTopWindow(self.frame)
>         self.frame.Show(True)
>         return True
>
> # 
> -------------------------------------------------------------------------------
>
> def main():
>     app = MyApp(False)
>     app.MainLoop()
>
> # 
> -------------------------------------------------------------------------------
>
> if __name__ == "__main__":
>     main()
>
>
>
>
>
>
>

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