/**********************************************************************

  Audacity: A Digital Audio Editor

  TimeTrack.h

  Dr William Bland

**********************************************************************/

#ifndef __AUDACITY_TIMETRACK__
#define __AUDACITY_TIMETRACK__

#include "Track.h"
#include <wx/brush.h>
#include <wx/pen.h>

class wxRect;
class wxDC;
class Envelope;
class Ruler;

class TimeTrack: public Track {

 public:

   TimeTrack(DirManager * projDirManager);
   TimeTrack(TimeTrack &orig);

   virtual ~TimeTrack();

   // Identifying the type of track
   virtual int GetKind() const { return Time; } 

   // TimeTrack parameters

   virtual double GetOffset() { return 0.0; };
   virtual void SetOffset(double /* t */) {};

   virtual double GetStartTime() { return 0.0; };
   virtual double GetEndTime() { return 0.0; };

   void Draw(wxDC & dc, const wxRect & r, double h, double pps);

   // XMLTagHandler callback methods for loading and saving

   virtual bool HandleXMLTag(const wxChar *tag, const wxChar **attrs);
   virtual XMLTagHandler *HandleXMLChild(const wxChar *tag);
   virtual void WriteXML(XMLWriter &xmlFile);

   // Lock and unlock the track: you must lock the track before
   // doing a copy and paste between projects.

   bool Lock();
   bool Unlock();

   // Access the track's speed envelope

   Envelope *GetEnvelope() { return mEnvelope; }
   
   //Compute the integral warp factor between two non-warped time points
   double ComputeWarpFactor(double t0, double t1);

   // Get/Set the speed-warping range, as percentage of original speed (e.g. 90%-110%)

   long GetRangeLower() { return mRangeLower ? mRangeLower : 1; }
   long GetRangeUpper() { return mRangeUpper ? mRangeUpper : 1; }

   void SetRangeLower(long lower) { mRangeLower = lower; }
   void SetRangeUpper(long upper) { mRangeUpper = upper; }

   double warp( double t );

   void testMe();

 private:
   Envelope        *mEnvelope;
   Ruler           *mRuler;
   long             mRangeLower;
   long             mRangeUpper;

   void Init(const TimeTrack &orig);
   virtual Track *Duplicate();

   friend class TrackFactory;

   wxBrush blankBrush;
   wxPen blankPen;
};


#endif // __AUDACITY_TIMETRACK__

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