pre-on-char

Called when this window or a child window receives a keyboard event. The top-most parent's pre-on-char method is called first; if the return value is #f, the pre-on-char method is called for the next child in the path to the receiver. Finally, if the receiver's pre-on-char method returns #f, the event is passed on to the receiver's normal key-handling mechanism.

• (send a-mred:empty-frame pre-on-char receiver event) -> boolean
      receiver : wx:window% object
      event : wx:key-event% object

  The event argument is the event that was generated for the receiver window.

  This gives the key event to the keymap and if there is no binding for the key, calls the super-method.