title: wxWigets create wxPanel changing with the context
body: <p>My software is based on just a frame dividen into two panels<br><br>
  For example, if I click the button "let's draw", the first panel on the left should becone a toolbox (with colour palette, brush and so on), the second panel should become a paint like panel<br><br>
  If I click the button "let's sing", on the left should appear four button, on the right the song to sing<br><br></p>
  
  <p>What's the best tecnique to obtain that result?</p>
  
  <ol>
  <li>I render the four panel (two for drawing, two for singing). The two I use are in position 0,0; the other are in position -1000,0</li>
  <li>I create some function changeLeftPanelIntoDrawing(), changeRightPanelIntoDrawing(), changeLeftPanelIntoSinging(), changeRightPanelIntoSinging(), then I call them on click</li>
  <li>Other hint?</li>
  </ol>