Re: wx.PyEvent cloning

James Wettenhall wrote:
> Hi,
>
> I'm having an issue with wx.PyEvents while testing my application with
> Phoenix  I think it's related to this change to wx.PyEvent's Clone
> method:
> https://github.com/wxWidgets/Phoenix/commit/360e3e6b2f9f14429a992a47e9a4df93202f9fee
>
> I have tried unsuccessfully to come up with a small reproducible code
> sample demonstrating the problem, but I'll try to describe it.
>
> I define a custom event class, using a similar method
> to wx.lib.newevent's NewEvent, something like this:
>
> class MyPyEvent(wx.PyEvent):
>     def __init__(self, **kw):
>         wx.PyEvent.__init__(self)
>         if 'phoenix' in wx.PlatformInfo:
>             self._getAttrDict().update(kw)
>         else:
>             self.__dict__.update(kw)
>
> I then instantiate an event and give it a "nextEvent" attribute:
>
> event = MyPyEvent(nextEvent=anotherEvent)
>
> This event is posted with wx.PostEvent and then handled by an event
> handler.
> The event handler starts a thread, passing the event as an argument.
> The thread's worker does some potentially time-consuming stuff and
> then calls wx.PostEvent(event.nextEvent)
>
> When testing with Phoenix, I have found that unless I explicitly
> Clone() the event before passing it from the event handler to the
> thread's worker, sometimes the event's "nextEvent" attribute is
> missing at the time the thread's worker tries to post the nextEvent,
> and that calling event._getAttrDict().keys() in the thread's worker
> can give:
>
>     sys.stdout.write("Check. event._getAttrDict().keys() = %s\n" %
> event._getAttrDict().keys())
>
> RuntimeError: wrapped C/C++ object of type Event has been deleted
>
>
> Is this expected behaviour (that I should need to Clone()the event
> before passing it from an event handler to a thread worker)?
>
>

No, it shouldn't be needed. Please make a small runnable sample I can
use for debugging the problem.


-- 
Robin Dunn
Software Craftsman
http://wxPython.org

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