SampleHandle.h

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/**********************************************************************
 
Audacity: A Digital Audio Editor
 
SampleHandle.h
 
Paul Licameli
 
**********************************************************************/
 
#ifndef __AUDACITY_SAMPLE_HANDLE__
#define __AUDACITY_SAMPLE_HANDLE__
 
#include "../../../../UIHandle.h"
#include "SampleCount.h"
 
class wxMouseEvent;
class wxMouseState;
 
class Track;
class ViewInfo;
class WaveChannel;
class WaveClipChannel;
 
class SampleHandle final : public UIHandle
{
   SampleHandle(const SampleHandle&) = delete;
   static HitTestPreview HitPreview
      (const wxMouseState &state, const AudacityProject *pProject, bool unsafe);
 
public:
   explicit SampleHandle(const std::shared_ptr<WaveChannel> &pTrack);
 
   SampleHandle &operator=(const SampleHandle&) = default;
 
   static UIHandlePtr HitAnywhere(
      std::weak_ptr<SampleHandle> &holder,
      const wxMouseState &state, const std::shared_ptr<WaveChannel> &pChannel);
   static UIHandlePtr HitTest(
      std::weak_ptr<SampleHandle> &holder,
      const wxMouseState &state, const wxRect &rect,
      const AudacityProject *pProject,
      const std::shared_ptr<WaveChannel> &pChannel);
 
   virtual ~SampleHandle();
 
   std::shared_ptr<const Track> FindTrack() const override;
 
   void Enter(bool forward, AudacityProject *) override;
 
   Result Click
      (const TrackPanelMouseEvent &event, AudacityProject *pProject) override;
 
   Result Drag
      (const TrackPanelMouseEvent &event, AudacityProject *pProject) override;
 
   HitTestPreview Preview
      (const TrackPanelMouseState &state, AudacityProject *pProject)
      override;
 
   Result Release
      (const TrackPanelMouseEvent &event, AudacityProject *pProject,
       wxWindow *pParent) override;
 
   Result Cancel(AudacityProject *pProject) override;
 
   bool StopsOnKeystroke() override { return true; }
 
private:
   float FindSampleEditingLevel
      (const wxMouseEvent &event, const ViewInfo &viewInfo, double t0);
 
   std::shared_ptr<WaveChannel> mClickedTrack;
   std::shared_ptr<WaveClipChannel> mClickedClip {};
   wxRect mRect{};
 
   int mClickedStartPixel {};
   int mLastDragPixel {};
   float mLastDragSampleValue{};
   bool mAltKey{};
};
 
#endif