/*

ARIA header files for use with ARNL 1.7.1

Copyright(C) 2004, 2005 ActivMedia Robotics, LLC. 
Copyright(C) 2006, 2007, 2008, 2009 MobileRobots Inc.
All rights reserved.

This copy of Aria was relicensed for use with Arnl and the Arnl
license by MobileRobots Inc.  If you wish to download a seperate
distribution of Aria licensed under the GPL or a commercial license go to
http://www.mobilerobots.com/SOFTWARE/aria.html or contact MobileRobots
Inc, at robots@mobilerobots.com or MobileRobots Inc,
10 Columbia Drive, Amherst, NH 03031; 800-639-9481

MobileRobots Inc hereby grants to other individuals or
organizations permission to use this software with Arnl and in
compliance with the Arnl license.  This software may not be
distributed to others except by MobileRobots Inc.

MobileRobots Inc does not make any representations about the
suitability of this software for any purpose.  It is provided "as is"
without express or implied warranty.

*/
#ifndef ARMODE_H
#define ARMODE_H

#include "ariaTypedefs.h"
#include "ArFunctor.h"
#include <string>
#include <list>

class ArRobot;


/// A class for different modes, mostly as related to keyboard input
/**
  Each mode is going to need to add its keys to the keyHandler...
  each mode should only use the keys 1-0, the arrow keys (movement),
  the space bar (stop), z (zoom in), x (zoom out), and e (exercise)...
  then when its activate is called by that key handler it needs to
  first deactivate the ourActiveMode (if its not itself, in which case
  its done) then add its key handling stuff... activate and deactivate
  will need to add and remove their user tasks (or call the base class
  activate/deactivate to do it) as well as the key handling things for
  their other part of modes.  This mode will ALWAYS bind help to /, ?, h,
  and H when the first instance of an ArMode is made.
**/
class ArMode 
{
public:
  /// Constructor
  AREXPORT ArMode(ArRobot *robot, const char *name, char key, char key2);
  /// Destructor
  AREXPORT virtual ~ArMode();
  /// Gets the name of the mode
  AREXPORT const char *getName(void);
  /// The function called when the mode is activated, subclass must provide
  AREXPORT virtual void activate(void) = 0;
  /// The function called when the mode is deactivated, subclass must provide
  AREXPORT virtual void deactivate(void) = 0;
  /// The ArMode's user task, don't need one, subclass must provide if needed
  AREXPORT virtual void userTask(void) {}
  /// The mode's help print out... subclass must provide if needed
  /** 
      This is called as soon as a mode is activated, and should give
      directions on to what keys do what and what this mode will do
  **/
  AREXPORT virtual void help(void) {}
  /// The base activation, it MUST be called by inheriting classes,
  /// and inheriting classes MUST return if this returns false
  AREXPORT bool baseActivate(void); 
  /// The base deactivation, it MUST be called by inheriting classes,
  /// and inheriting classes MUST return if this returns false
  AREXPORT bool baseDeactivate(void);
  /// This is the base help function, its internal, bound to ? and h and H
  AREXPORT static void baseHelp(void);
  /// An internal function to get the first key this is bound to
  AREXPORT char getKey(void);
  /// An internal function to get the second key this is bound to
  AREXPORT char getKey2(void);
protected:
  void addKeyHandler(int keyToHandle, ArFunctor *functor);
  void remKeyHandler(ArFunctor *functor);
  // Our activeArMode
  static ArMode *ourActiveMode;
  std::string myName;
  ArRobot *myRobot;
  ArFunctorC<ArMode> myActivateCB;
  ArFunctorC<ArMode> myDeactivateCB;
  ArFunctorC<ArMode> myUserTaskCB;
  char myKey;
  char myKey2;
  // our help callback, its NULL until its initialized
  static ArGlobalFunctor *ourHelpCB;
  static std::list<ArMode *> ourModes;
};

#endif // ARMODE_H