title: Getting a pop up canvas to take focus
body: <p>How do I transfer keyboard control from one canvas to another</p>
  
  <pre><code>self.canvas.bind('&lt;FocusOut&gt;')
  self.canvas2.bind('&lt;FocusIn&gt;')
  </code></pre>
  
  <p>doesn't work, the focus is still on canvas one and the keyboard still acts on canvas one not canvas two.</p>
  
  <p>As well</p>
  
  <pre><code>self.canvas2.focus_set()
  </code></pre>
  
  <p>still keeps the focus on self.canvas and not on self.canvas2.</p>