Question

How to determine in GWT that user pressed Backspace button? I tried this, but it does not work

  @Override
  public void onKeyPress(KeyPressEvent event) {
       char charCode= event.getCharCode();
       if(charCode == (char) KeyCodes.KEY_BACKSPACE){
           //do someThing 
       }
  }

Answer 1

The keypress event is implemented in most browsers as only firing when a character would be produced (and that’s how it’s being standardized: http://www.w3.org/TR/DOM-Level-3-Events/#event-type-keypress ). Backspace obviously doesn’t produce a character; you should use keydown or keyup to detect it.