//| Copyright: (C) 2019-2020 Kevin Larke <contact AT larke DOT org> 
//| License: GNU GPL version 3.0 or above. See the accompanying LICENSE file.
#ifndef cmGrTlFltk_h
#define cmGrTlFltk_h

class Fl_Menu_Bar;
class cmdIf;


class cmGrTlFltk : public cmGrPlotFltk, public gvHashFuncArg
{
 public:
  cmGrTlFltk(cmCtx_t* ctx, cmdIf* cp, Fl_Menu_Bar* menuBar, int x, int y, int w, int h);
  virtual ~cmGrTlFltk();

  virtual cmTlUiMsgTypeId_t recvTimeLineMsg( const void* msg, unsigned msgByteCnt );
  virtual void              recvAudioFileLoad( unsigned fileId );

  virtual double   sampleRate() const { return _srate; }

  // Call these functions to notify the UI of changes of state that
  // occurred programmatically.  These notifications are bubbling up
  // from the engine.
  typedef enum { kSamplesMetricId, kSecondsMetricId } timeAxisMetricId_t;
  virtual void     setTimeAxisMetric( timeAxisMetricId_t metricId );
  virtual void     toggleMarkerText();
  virtual unsigned timeLineSelectedMarkerId() const;
  virtual void     setAudioFileCursor( unsigned smpIdx );
  virtual void     selectBar( unsigned barNumb );

  // This function is called to notify the timeline UI that that state of one of it's
  // UI elements has been changed/manipulated by the user.  This is the first
  // point of contact with a requested change from the user which is being
  // directed down to the engine.
  virtual bool on_plot_object(   cmGrPlotCbArg_t* arg );

 private:
  enum
  {
    kOkRC,
    kParentObjNotFoundRC,
    kInsertObjFailRC,
    kAudioObjFailRC,
  };

  enum
  {
    kAudioVwIdx,
    kMidiVwIdx,
    kViewCnt
  };

  enum
  {
    kViewSamplesMId,
    kViewSecondsMId,
    kViewMarkTextMId,
    kViewPitchMId,
    kViewVelocityMId,
    kViewIdMId,
    kGenOnsetMarksMId,
    kDelOnsetMarksMId,
    kMenuItemCnt
  };

  // Flags returned by _getMenuCheckFlags();
  enum { kPitchChkFl=0x01, kVelChkFl=0x02, kIdChkFl=0x04 };


  typedef struct item_str
  {
    cmGrTlFltk* p;
    int         id;
  } item_t;


  cmErr_t      _err;
  double       _srate;
  cmdIf*       _cmdIf;
  Fl_Menu_Bar* _menuBar;
  int          _seqMenuIdx;
  int          _seqCnt;
  item_t*      _seqItemArray;
  int          _markCnt;
  unsigned     _samplesMetricId;
  unsigned     _secondsMetricId;
  cmGrPlObjH_t _selMarkPlotObjH;
  unsigned     _curSeqId;
  item_t       _menuArray[ kMenuItemCnt ];
  

  void     _insertTimeLineObj( const cmTlUiMsg_t* m );
  void     _updateSeqMenu(int  newSeqCnt, unsigned seqId);
  void     _createMenu();
  bool     _isMenuChecked(int id);
  unsigned _getMenuCheckFlags();
  void     _setLabels();
  void     _setMidiEventLabels( cmGrPlObjH_t poH, unsigned flags);

  static void _s_seqMenuCallback( Fl_Widget* w, void* vp );

  static void _s_midiSciPitchValueFunc( void* arg, cmChar_t* label, unsigned labelCharCnt, cmGrV_t value );
  static void _s_roundHashValueFunc(    void* arg, cmChar_t* label, unsigned labelCharCnt, cmGrV_t value );
  static void _s_minSecMsHashValueFunc( void* arg, cmChar_t* label, unsigned labelCharCnt, cmGrV_t value );
  static void _s_menuCallback( Fl_Widget* w, void* arg );
};



#endif