dme.hxx

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/*
 * SPDX-License-Identifier: CC0-1.0
 * 
 * dme.hxx - distance-measuring equipment.
 * Written by David Megginson, started 2003.
 * 
 * This file is in the Public Domain and comes with no warranty.
*/
 
#pragma once
 
#include <Instrumentation/AbstractInstrument.hxx>
 
// forward decls
class FGNavRecord;

class DME : public AbstractInstrument
{
public:
    DME ( SGPropertyNode *node );
    virtual ~DME ();
 
    // Subsystem API.
    void init() override;
    void reinit() override;
    void update(double delta_time_sec) override;
 
    // Subsystem identification.
    static const char* staticSubsystemClassId() { return "dme"; }
 
private:
        void clear();
 
    SGPropertyNode_ptr _source_node;
    SGPropertyNode_ptr _frequency_node;
 
    SGPropertyNode_ptr _in_range_node;
    SGPropertyNode_ptr _distance_node;
    SGPropertyNode_ptr _speed_node;
    SGPropertyNode_ptr _time_node;
    SGPropertyNode_ptr _ident_btn_node;
    SGPropertyNode_ptr _volume_node;
 
    SGPropertyNode_ptr _distance_string;
    SGPropertyNode_ptr _speed_string;
    SGPropertyNode_ptr _time_string;
 
    double _last_distance_nm;
    double _last_frequency_mhz;
    double _time_before_search_sec;
 
    FGNavRecord * _navrecord;
 
    class AudioIdent * _audioIdent;
};