title: waitforbuttonpress() matplotlib possible bug
body: <p>Consider a refreshed figure inside a loop as per the following code:</p>
  
  <pre><code>import matplotlib.pyplot as plt
  
  def fun_example():
  
      plt.ion()
      for ite in range(3):
          x = np.linspace(-2,6,100)
          y = (ite+1)*x
  
          figura = plt.figure(1)
          plt.plot(x,y,'-b')
          plt.waitforbuttonpress()
          plt.close()
      #endfor ite
  
  #enddef fun_example
  
  if __name__ == '__main__':
      fun_example()
  #endif main
  </code></pre>
  
  <p>The idea is to inspect the figure with the mouse (for example, during debugging use the zoom option in the toolbar of the figure), and once it is done, press a button to go on with the code. At least in my case (windows 7, python 3.4.4, spyder 3.0.0dev), if I intend to mouse click in the graph for zooming, the effect is the same than press-button. In other words <em>waitforbuttonpress()</em> returns <em>True</em>, and the figure is gone.</p>
  
  <p>Any suggestion? might it be a bug? Thank all of you in advance.</p>