TrackVRulerControls.h

Go to the documentation of this file.

/**********************************************************************
 
Audacity: A Digital Audio Editor
 
TrackVRulerControls.h
 
Paul Licameli split from TrackPanel.cpp
 
**********************************************************************/
 
#ifndef __AUDACITY_TRACK_VRULER_CONTROLS__
#define __AUDACITY_TRACK_VRULER_CONTROLS__
 
#include "CommonTrackPanelCell.h"
 
class Track;
class TrackView;
class wxDC;
 
const int kGuard = 5; // 5 pixels to reduce risk of VZooming accidentally
 
class AUDACITY_DLL_API TrackVRulerControls /* not final */
   : public CommonTrackPanelCell
   , public std::enable_shared_from_this< TrackVRulerControls >
{
public:
   explicit
   TrackVRulerControls( const std::shared_ptr<TrackView> &pTrackView );
 
   virtual ~TrackVRulerControls() = 0;
 
   static TrackVRulerControls &Get( TrackView& );
   static const TrackVRulerControls &Get( const TrackView& );
 
   // Define a default hit test method, just for message and cursor
   std::vector<UIHandlePtr> HitTest
      (const TrackPanelMouseState &state,
       const AudacityProject *pProject) override;
 
   // Helpers for handle classes' TrackPanelDrawable implementations
   static void DrawZooming
      ( TrackPanelDrawingContext &context, const wxRect &rect,
        int zoomStart, int zoomEnd);
   static wxRect ZoomingArea( const wxRect &rect, const wxRect &panelRect );
 
   // Modify the ruler rectangle, and related display parameters,
   // cached in the associated track
   virtual void UpdateRuler( const wxRect &rect ) = 0;
 
protected:
   std::shared_ptr<Track> DoFindTrack() override;
 
   // TrackPanelDrawable implementation
   void Draw(
      TrackPanelDrawingContext &context,
      const wxRect &rect, unsigned iPass ) override;
 
   wxRect DrawingArea(
      TrackPanelDrawingContext &,
      const wxRect &rect, const wxRect &panelRect, unsigned iPass ) override;
 
   Track *GetTrack() const;
 
   std::weak_ptr<TrackView> mwTrackView;
};
 
#endif