src/frontends/KeyModifier.h

   1 // -*- C++ -*-
   2 /**
   3  * \file KeyModifier.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * Keyboard modifier state representation.
   8  *
   9  * \author John Levon
  10  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #ifndef KEYMODIFIER_H
  15 #define KEYMODIFIER_H
  16
  17 namespace lyx {
  18
  19 /// modifier key states
  20
  21 enum KeyModifier {
  22         NoModifier       = 0, //< no modifiers held
  23         ControlModifier  = 1, //< control button held
  24         AltModifier      = 2, //< alt/meta key held
  25         ShiftModifier    = 4  //< shift key held
  26 };
  27
  28
  29 inline KeyModifier operator|(KeyModifier s1, KeyModifier s2)
  30 {
  31         int const i1 = static_cast<int>(s1);
  32         int const i2 = static_cast<int>(s2);
  33         return static_cast<KeyModifier>(i1 | i2);
  34 }
  35
  36
  37 inline void operator|=(KeyModifier & s1, KeyModifier s2)
  38 {
  39         s1 = static_cast<KeyModifier>(s1 | s2);
  40 }
  41
  42
  43 } // namespace lyx
  44
  45 #endif // KEYMODIFIER_H