title: CKEditor hook/event fired up on switching to/from source view
body: <p>I try to convert a div tag into something I can drag and drop in CKEditor (as asked in another question).</p>
  <p>Do you know how I can trigger the event when someone <strong>switches</strong> between <strong>source view</strong> and <strong>WYSIWYG mode</strong>?</p>