title: Focusable composite in SWT
body: <p>We have a custom control that is essentially a composite with label and a button. Currently when the user presses "Tab" the focus comes to the button.</p>
  
  <p>How can I make the composite to receive focus and the button to be excluded from the focus? E.g. the user should be able to tab through all custom controls and not stop at buttons.</p>
  
  <p><strong>Updated:</strong> Our controls tree looks like this:</p>
  
  <ul>
  <li>Main pane
  <ul>
  <li>CustomPanel1
  <ul>
  <li>Label</li>
  <li>Button</li>
  </ul></li>
  <li>CustomPanel2
  <ul>
  <li>Label</li>
  <li>Button</li>
  </ul></li>
  <li>CustomPanel3
  <ul>
  <li>Label</li>
  <li>Button</li>
  </ul></li>
  </ul></li>
  </ul>
  
  <p>All CustomPanel's are of the same Composite subclass. What we need is for the tab to cycle between those panels and do not "see" buttons (those are the only focusable components)</p>