ZoomHandle.h

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/**********************************************************************
 
Audacity: A Digital Audio Editor
 
ZoomHandle.h
 
Paul Licameli split from TrackPanel.cpp
 
**********************************************************************/
 
#ifndef __AUDACITY_ZOOM_HANDLE__
#define __AUDACITY_ZOOM_HANDLE__
 
#include "../../UIHandle.h"
 
class wxMouseState;
 
// This handle class, unlike most, doesn't associate with any particular cell.
class ZoomHandle final : public UIHandle
{
   ZoomHandle(const ZoomHandle&) = delete;
   static HitTestPreview HitPreview
      (const wxMouseState &state, const AudacityProject *pProject);
 
public:
   ZoomHandle();
 
   ZoomHandle &operator=(const ZoomHandle&) = default;
 
   static UIHandlePtr HitAnywhere
      (std::weak_ptr<ZoomHandle> &holder);
   static UIHandlePtr HitTest
      (std::weak_ptr<ZoomHandle> &holder, const wxMouseState &state);
 
   virtual ~ZoomHandle();
 
   std::shared_ptr<const Track> FindTrack() const override;
 
   bool HandlesRightClick() 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;
 
private:
 
   // TrackPanelDrawable implementation
   void Draw(
      TrackPanelDrawingContext &context,
      const wxRect &rect, unsigned iPass ) override;
 
   wxRect DrawingArea(
      TrackPanelDrawingContext &,
      const wxRect &rect, const wxRect &panelRect, unsigned iPass ) override;
 
   bool IsDragZooming() const;
 
   int mZoomStart{}, mZoomEnd{};
   wxRect mRect{};
};
 
#endif