控件内置的光标资源

enum InternalCursorType {
  kICTRealTimeZoom = 1,
  kICTRealTimeZoomNoIn,
  kICTRealTimeZoomNoOut,
  kICTPan,
  kICTPanAllNo,
  kICTPanBottomNo,
  kICTPanLeftBottomNo,
  kICTPanLeftNo,
  kICTPanLeftTopNo,
  kICTPanRightBottomNo,
  kICTPanRightNo,
  kICTPanRightTopNo,
  kICTPanTopNo,
  kICTMagnifyingGlass
};