title: Custom ValueChangeHandler GWT
body: <p>I need to write a custom <code>ValueChangeHandler</code> and call out <code>onValueChange(ValueChangeEvent)</code>. However I don't understand how to write a <code>ValueChangeEvent</code>.</p>
  
  <p>Maybe I understand the entire GWT event system wrong. Can anyone help?</p>
  
  <p><strong>Edit:</strong> I am asking how to create my own class that dispatches the ValueChangeEvent. I understand how to listen to it.</p>
  
  <p>The constructor of ValueChangeEvent is not visible and I can't create it.</p>