def __init__(self, parent):
wx.Panel.__init__(self, parent)
# Member variables.
self.filters = []
self.filter_list = FilterList(self)
# create sizer for the object panel.
self.sizer = wx.BoxSizer(wx.HORIZONTAL)
self.sizer.Add(self.filter_list, 1, wx.EXPAND)
self.SetSizer(self.sizer)
