PlayIndicatorOverlay.h

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/**********************************************************************
 
Audacity: A Digital Audio Editor
 
PlayIndicatorOverlay.h
 
Paul Licameli split from TrackPanel.cpp
 
**********************************************************************/
 
#ifndef __AUDACITY_PLAY_INDICATOR_OVERLAY__
#define __AUDACITY_PLAY_INDICATOR_OVERLAY__
 
#include <memory>
#include "ClientData.h"
#include "../../widgets/Overlay.h" // to inherit
#include "Observer.h"
 
class AudacityProject;
 
 
// Common class for overlaying track panel or ruler
class PlayIndicatorOverlayBase
   : public Overlay
   , public ClientData::Base
{
public:
   PlayIndicatorOverlayBase(AudacityProject *project, bool isMaster);
   virtual ~PlayIndicatorOverlayBase();
 
   void Update(int newIndicatorX) { mNewIndicatorX = newIndicatorX; }
 
private:
   unsigned SequenceNumber() const override;
   std::pair<wxRect, bool> DoGetRectangle(wxSize size) override;
   void Draw(OverlayPanel &panel, wxDC &dc) override;
 
protected:
 
   AudacityProject *const mProject;
   const bool mIsMaster;
   int mLastIndicatorX { -1 };
   int mNewIndicatorX { -1 };
   bool mNewIsCapturing { false };
   bool mLastIsCapturing { false };
};
 
// Master object for track panel, creates the other object for the ruler
class PlayIndicatorOverlay final : public PlayIndicatorOverlayBase
{
public:
   explicit
   PlayIndicatorOverlay(AudacityProject *project);
 
private:
   void OnTimer(Observer::Message);
 
   std::shared_ptr<PlayIndicatorOverlayBase> mPartner;
   Observer::Subscription mSubscription;
};
 
#endif