// clock.hxx.
// Written by Melchior FRANZ, started 2003.
//
// This file is in the Public Domain and comes with no warranty.
//
// $Id$


#ifndef __INSTRUMENTS_CLOCK_HXX
#define __INSTRUMENTS_CLOCK_HXX 1

#ifndef __cplusplus
# error This library requires C++
#endif

#include <simgear/props/props.hxx>
#include <simgear/structure/subsystem_mgr.hxx>


/**
 * Model a clock.
 *
 * Input properties:
 *
 * /instrumentation/clock/serviceable
 * /instrumentation/clock/offset-sec
 *
 * Output properties:
 *
 * /instrumentation/clock/indicated-sec
 * /instrumentation/clock/indicated-string
 */
class Clock : public SGSubsystem
{

public:

    Clock ();
    virtual ~Clock ();

    virtual void init ();
    virtual void update (double dt);

private:

    bool _is_serviceable;
    long _gmt_time_sec;
    long _offset_sec;
    long _indicated_sec;
    char _indicated_string[16];
    long _standstill_offset;

    SGPropertyNode_ptr _serviceable_node;
    SGPropertyNode_ptr _offset_node;
    SGPropertyNode_ptr _sec_node;
    SGPropertyNode_ptr _string_node;

};

#endif // __INSTRUMENTS_CLOCK_HXX