KeySensor {
    eventIn      SFBool     eventsProcessed
    exposedField SFBool     enabled          TRUE
    eventOut     SFInt32    keyPress
    eventOut     SFInt32    keyRelease
    eventOut     SFInt32    actionKeyPress
    eventOut     SFInt32    actionKeyRelease
    eventOut     SFBool     shiftKey_changed
    eventOut     SFBool     controlKey_changed
    eventOut     SFBool     altKey_changed
    eventOut     SFBool     isActive
  }