用户输入函数控制操作符

enum UserInputControls {
  kGovernedByOrthoMode = 0x0001,
  kNullResponseAccepted = 0x0002,
  kDontEchoCancelForCtrlC = 0x0004,
  kDontUpdateLastPoint = 0x0008,
  kNoDwgLimitsChecking = 0x0010,
  kNoZeroResponseAccepted = 0x0020,
  kNoNegativeResponseAccepted = 0x0040,
  kAccept3dCoordinates = 0x0080,
  kAcceptMouseUpAsPoint = 0x0100,
  kAnyBlankTerminatesInput = 0x0200,
  kInitialBlankTerminatesInput = 0x0400,
  kAcceptOtherInputString = 0x0800,
  kGovernedByUCSDetect = 0x1000,
  kNoZDirectionOrtho = 0x2000,
  kSpacesInAccepted = 0x4000
};