title: How to generate a key press event in traitsui (Mayavi)?
body: <p>I have a Mayavi scene widget with a toolbar and I want to add a button with the same behaviour that pressing CTRL+C, CTRL+A <strong>(Change between camera and actor interactor mode).</strong></p>
  
  <p>I think that simulating a key press event by cliking in the button is the simplest aproach to do that, so the question is <strong>¿How to simulate a key press event in Traitsui (the Mayavi GUI toolkit)?</strong></p>
  
  <p>Does anybody know another way to perform the same action that CTRL+C, CTRL+A?</p>
  
  <p>Thanks in advance!</p>