ChannelVRulerControls.h

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/**********************************************************************
 
Audacity: A Digital Audio Editor
 
ChannelVRulerControls.h
 
Paul Licameli split from TrackPanel.cpp
 
**********************************************************************/
 
#ifndef __AUDACITY_TRACK_VRULER_CONTROLS__
#define __AUDACITY_TRACK_VRULER_CONTROLS__
 
#include "CommonTrackPanelCell.h"
 
class Track;
class ChannelView;
class wxDC;
 
const int kGuard = 5; // 5 pixels to reduce risk of VZooming accidentally
 
class AUDACITY_DLL_API ChannelVRulerControls /* not final */
   : public CommonChannelCell
   , public std::enable_shared_from_this<ChannelVRulerControls>
{
public:
   explicit
   ChannelVRulerControls(const std::shared_ptr<ChannelView> &pChannelView);
 
   virtual ~ChannelVRulerControls() = 0;
 
   static ChannelVRulerControls &Get(ChannelView&);
   static const ChannelVRulerControls &Get(const ChannelView&);
 
   // 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;
 
   std::shared_ptr<const ChannelView> GetChannelView() const
   {
      return mwChannelView.lock();
   }
 
protected:
   std::shared_ptr<Track> DoFindTrack() override;
 
   wxRect DrawingArea(
      TrackPanelDrawingContext &,
      const wxRect &rect, const wxRect &panelRect, unsigned iPass ) override;
 
   Track *GetTrack() const;
 
   std::weak_ptr<ChannelView> mwChannelView;
};
 
#endif