Creating custom event in WxPython

fraca7 fraca7 at free.fr
Thu Sep 1 16:25:05 CEST 2005


NutJob at gmx.net a écrit :

> Now when my socket thread detects an incoming message, I need my main
> thread to interpret the message and react to it by updating the GUI.
> IMO the best way to achieve this is by having my socket thread send a
> custom event to my application's event loop for the main thread to
> process. However, I'm at a total loss as far as creating custom events
> is concerned. The WxWindows documentation isn't very helpful on this
> either.

I think this is what you're looking for:

# begin code

import wx

wxEVT_INVOKE = wx.NewEventType()

class InvokeEvent(wx.PyEvent):
     def __init__(self, func, args, kwargs):
         wx.PyEvent.__init__(self)
         self.SetEventType(wxEVT_INVOKE)
         self.__func = func
         self.__args = args
         self.__kwargs = kwargs

     def invoke(self):
         self.__func(*self.__args, **self.__kwargs)

class MyFrame(wx.Frame):
     def __init__(self, *args, **kwargs):
         wx.Frame.__init__(self, *args, **kwargs)
         self.Connect(-1, -1, wxEVT_INVOKE, self.onInvoke)

     def onInvoke(self, evt):
         evt.invoke()

     def invokeLater(self, func, *args, **kwargs):
         self.GetEventHandler().AddPendingEvent(InvokeEvent(func, args, 
kwargs))

# end code

This way, if frm is an instance of MyFrame, invoking 
frm.invokeLater(somecallable, arguments...) will invoke 'somecallable' 
with the specified arguments in the main GUI thread.

I found this idiom somewhere on the Web and can't remember where.

HTH



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