[Matplotlib-users] NavigationToolbar2WxAgg Buttons Disappear

[David G. <da...@we...>]

Hi All,
I've encountered this problem with the both NavigationToolbar2Wx and the NavigationToolbar2WxAgg.
When I click the Zoom or Pan button the button disappears. The functionality is maintained so if a click the location that the button used to be displayed at the toggle action still works its just that the button is no longer displayed.
Can any one help me fix this?
Thanks 
David

Here's the code that demonstrated the problem"
######################################
#####    Start of Code        #################
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#!/usr/bin/env python
# encoding: UTF-8
"""
Basic wxPython App w DrawPanel.py

"""

import sys
reload(sys) 
sys.setdefaultencoding("utf-8")
import os
import time
import numpy as np

import matplotlib
matplotlib.use('WXAgg')
from matplotlib.backends.backend_wxagg import Toolbar, FigureCanvasWxAgg
from matplotlib.figure import Figure
import pylab as plt
import wx

from matplotlib.backends.backend_wxagg import NavigationToolbar2WxAgg

class DrawPanel(wx.Panel):
	""" This class constructs a Matplotlib figure and canvas to allow for plots. """
	def __init__(self, parent):
		wx.Panel.__init__(self, parent, -1)
		#Create the widgets
		self.figure = Figure(figsize=(1,1))
		self.canvas = FigureCanvasWxAgg(self, -1, self.figure)
		self.toolbar = NavigationToolbar2WxAgg(self.canvas)	
		sizer = wx.BoxSizer(wx.VERTICAL)
		# add to sizer allows resizing
		sizer.Add(self.toolbar, 0, wx.LEFT|wx.TOP)
		sizer.Add(self.canvas, 1, wx.LEFT|wx.TOP|wx.GROW)
		self.SetSizer(sizer)
		self.Fit()
		# plot some data
		self.x=np.arange(0,10,.1)
		self.y=plt.sin(self.x)
		self.init_plot()
		
	def init_plot(self):
		self.figure.clf()
		self.ax = self.figure.gca()
		self.ax.plot(self.x, self.y)
		self.canvas.draw()

########################################################################
class MainFrame(wx.Frame):
	"""This is the Main Frame"""
	#----------------------------------------------------------------------
	def __init__(self):
		"""Constructor"""
		wx.Frame.__init__(self, None, title="Basic wxPython App w DrawPanel",size=(800,600))
		# Create StatusBar
		self.sb=self.CreateStatusBar()
		self.SetStatusText('Basic wxPython App w DrawPanel')
		#------------------------------
		self.Freeze() # need this to prevent flicker during plot resize/redraw
		self.mainpanel = DrawPanel(self)
		self.Layout()
		self.Thaw()
		self.Show()

#----------------------------------------------------------------------
if __name__ == "__main__":
	app = wx.App(False)
	frame = MainFrame()
	app.MainLoop()

######################################
#####    End of Code           #################
######################################