def __init__(self, parent, session, responseCallback, **kwds): wx.Panel.__init__(self, parent, -1, **kwds) self.sizer = wx.BoxSizer(orient=wx.VERTICAL) self.SetSizer(self.sizer) self.stimulus = StimulusPanel(self, session, self._onTrialEnd) self.sizer.Add(self.stimulus, 0, wx.EXPAND) self.response = ResponsePanel(self, session, responseCallback) self.sizer.Add(self.response, 0, wx.EXPAND)