JoystickDevice.h

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//
//  Copyright (c) 2002, Perry L. Miller IV
//  All rights reserved.
//  BSD License: http://www.opensource.org/licenses/bsd-license.html
//

//
//  Wrapper class for two instances of gadget::AnalogInterface.
//

#ifndef _VRJGA_JOYSTICK_DEVICE_H_
#define _VRJGA_JOYSTICK_DEVICE_H_

#include "vrjGA/Callback.h"

#include "gadget/Type/AnalogInterface.h"

#include "gmtl/Matrix.h"

#include <string>
#include <map>


namespace vrjGA {


class VRJ_GA_EXPORT JoystickDevice : public Referenced
{
public:

  // Useful typedefs.
  typedef Referenced BaseClass;
  typedef gadget::AnalogInterface AI;

  VRJGA_DECLARE_POINTER ( JoystickDevice );

  // Constructor.
  JoystickDevice ( const std::string &h, const std::string &v );

  // Set/get the callback.
  void              callback ( Message m, Callback::Ptr c );
  Callback *        callback ( Message m );

  // Get the device's values.
  float             horizontal() const { return _h; }
  float             vertical()   const { return _v; }

  // Notify the client of any state changes.
  void              notify();

  // Update the internal state.
  void              update();

protected:

  virtual ~JoystickDevice();

private:

  typedef std::pair<Message,Message> MessagePair;
  typedef std::map<MessagePair,MessagePair> Transitions;
  typedef std::map<Message,Callback::Ptr> Callbacks;

  // Not copyable.
  JoystickDevice ( const JoystickDevice & );
  JoystickDevice& operator = ( const JoystickDevice & );

  void              _notify ( Message last, Message current );

  void              _sendMessage ( Message m );

  void              _updateState();

  Callbacks _cbm;
  Transitions _tm;
  AI _hai;
  AI _vai;
  float _h;
  float _v;
  Message _hs;
  Message _vs;
};


}; // namespace vrjGA


#endif // _VRJGA_JOYSTICK_DEVICE_H_

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