how to refresh figure.canvas


I can't understand how to refresh FigureCanvasWxAgg instance. Here is
the example:

import wx
import matplotlib
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.figure import Figure

class MainFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, wx.NewId(), "Main")
        self.sizer = wx.BoxSizer(wx.VERTICAL)

        self.figure = Figure(figsize=(1,2))
        self.axe = self.figure.add_subplot(111)
        self.figurecanvas = FigureCanvas(self, -1, self.figure)

        self.buttonPlot = wx.Button(self, wx.NewId(), "Plot")
        self.buttonClear = wx.Button(self, wx.NewId(), "Clear")

        self.sizer.Add(self.figurecanvas, proportion=1, border=5,
flag=wx.ALL | wx.EXPAND)
        self.sizer.Add(self.buttonPlot, proportion=0, border=2, flag=wx.ALL)
        self.sizer.Add(self.buttonClear, proportion=0, border=2, flag=wx.ALL)

        self.figurecanvas.Bind(wx.EVT_LEFT_DCLICK, self.on_dclick)
        self.buttonPlot.Bind(wx.EVT_BUTTON, self.on_button_plot)
        self.buttonClear.Bind(wx.EVT_BUTTON, self.on_button_clear)

        self.subframe_opened = False

    def on_dclick(self, evt):
        self.subframe = SubFrame(self, self.figure)
        self.subframe_opened = True

    def on_button_plot(self, evt):
        self.axe.plot(range(10), color='green')

    def on_button_clear(self, evt):
        if self.subframe_opened:

class SubFrame(wx.Frame):
    def __init__(self, parent, figure):
        wx.Frame.__init__(self, parent, wx.NewId(), "Sub")
        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.figurecanvas = FigureCanvas(self, -1, figure)
        self.sizer.Add(self.figurecanvas, proportion=1, border=5,
flag=wx.ALL | wx.EXPAND)

        self.Bind(wx.EVT_CLOSE, self.on_close)

    def on_close(self, evt):
        self.GetParent().subframe_opened = False

class MyApp(wx.App):
    def OnInit(self):
        frame = MainFrame()
        return True

app = MyApp(0)

I'm interested in the following sequence of operations:
- run a script
- resize the main frame
- press Plot button
- double click on plot
- press Clear button

Now I get a mess on main frame plot. If I resize the frame it redraws
properly. My question is what should I add to my code to do that
without resizing?

Thanks in advance,