src/Computer/AutoQNH.hpp

   1 /*
   2 Copyright_License {
   3
   4   XCSoar Glide Computer - http://www.xcsoar.org/
   5   Copyright (C) 2000-2013 The XCSoar Project
   6   A detailed list of copyright holders can be found in the file "AUTHORS".
   7
   8   This program is free software; you can redistribute it and/or
   9   modify it under the terms of the GNU General Public License
  10   as published by the Free Software Foundation; either version 2
  11   of the License, or (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with this program; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21 }
  22 */
  23
  24 #ifndef XCSOAR_AUTO_QNH_HPP
  25 #define XCSOAR_AUTO_QNH_HPP
  26
  27 #include "Math/fixed.hpp"
  28
  29 struct NMEAInfo;
  30 struct DerivedInfo;
  31 struct ComputerSettings;
  32 class Waypoints;
  33
  34 class AutoQNH {
  35   static constexpr unsigned QNH_TIME = 10;
  36
  37   unsigned countdown_autoqnh;
  38
  39 public:
  40   void Process(const NMEAInfo &basic, DerivedInfo &calculated,
  41                const ComputerSettings &settings_computer,
  42                const Waypoints &way_points);
  43
  44   void Reset();
  45
  46 protected:
  47   bool IsFinished() const {
  48     return countdown_autoqnh > QNH_TIME;
  49   }
  50
  51   bool CalculateQNH(const NMEAInfo &basic, DerivedInfo &calculated,
  52                     const Waypoints &way_points);
  53   void CalculateQNH(const NMEAInfo &basic, DerivedInfo &calculated,
  54                     fixed altitude);
  55 };
  56
  57 #endif