keyboard_event.h

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/*
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 *
 *  Point Cloud Library (PCL) - www.pointclouds.org
 *  Copyright (c) 2010-2011, Willow Garage, Inc.
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 * Author: Suat Gedikli (gedikli@willowgarage.com)
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#ifndef PCL_VISUALIZATION_KEYBOARD_EVENT_H_
#define PCL_VISUALIZATION_KEYBOARD_EVENT_H_
#include <string>

namespace pcl
{
  namespace visualization
  {
    class KeyboardEvent
    {
      public:
        static const unsigned int Alt   = 1;
        static const unsigned int Ctrl  = 2;
        static const unsigned int Shift = 4;

        inline KeyboardEvent (bool action, const std::string& key_sym, unsigned char key, 
                              bool alt, bool ctrl, bool shift);

        inline bool 
        isAltPressed () const;
        
        inline bool 
        isCtrlPressed () const;
        
        inline bool 
        isShiftPressed () const;

        inline unsigned char 
        getKeyCode () const;
        
        inline const std::string& 
        getKeySym () const;
        
        inline bool 
        keyDown () const;
        
        inline bool 
        keyUp () const;

      protected:

        bool action_;
        unsigned int modifiers_;
        unsigned char key_code_;
        std::string key_sym_;
    };

    KeyboardEvent::KeyboardEvent (bool action, const std::string& key_sym, unsigned char key, 
                                  bool alt, bool ctrl, bool shift)
      : action_ (action)
      , modifiers_ (0)
      , key_code_(key)
      , key_sym_ (key_sym)
    {
      if (alt)
        modifiers_ = Alt;

      if (ctrl)
        modifiers_ |= Ctrl;

      if (shift)
        modifiers_ |= Shift;
    }

    bool 
    KeyboardEvent::isAltPressed () const
    {
      return (modifiers_ & Alt) != 0;
    }

    bool 
    KeyboardEvent::isCtrlPressed () const
    {
      return (modifiers_ & Ctrl) != 0;
    }

    bool 
    KeyboardEvent::isShiftPressed () const
    {
      return (modifiers_ & Shift) != 0;
    }

    unsigned char 
    KeyboardEvent::getKeyCode () const
    {
      return (key_code_);
    }

    const std::string& 
    KeyboardEvent::getKeySym () const
    {
      return (key_sym_);
    }

    bool 
    KeyboardEvent::keyDown () const
    {
      return (action_);
    }

    bool 
    KeyboardEvent::keyUp () const
    {
      return (!action_);
    }  
  } // namespace visualization
} // namespace pcl

#endif  /* PCL_VISUALIZATION_KEYBOARD_EVENT_H_ */