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/* SPDX-License-Identifier: GPL-2.0-or-later */
/**********************************************************************
Audacity: A Digital Audio Editor
@file ProjectTimeSignature.h
Dmitry Vedenko
**********************************************************************/
#pragma once
#include "ClientData.h"
#include "Observer.h"
class AudacityProject;
struct TimeSignatureChangedMessage final
{
double newTempo {};
int newUpperTimeSignature {};
int newLowerTimeSignature {};
};
class NUMERIC_FORMATS_API ProjectTimeSignature final :
public ClientData::Base,
public Observer::Publisher<TimeSignatureChangedMessage>
{
public:
static ProjectTimeSignature& Get(AudacityProject& project);
static const ProjectTimeSignature& Get(const AudacityProject& project);
ProjectTimeSignature();
~ProjectTimeSignature() override;
double GetTempo() const;
void SetTempo(double tempo);
int GetUpperTimeSignature() const;
void SetUpperTimeSignature(int upperTimeSignature);
int GetLowerTimeSignature() const;
void SetLowerTimeSignature(int lowerTimeSignature);
double GetQuarterDuration() const;
double GetBeatDuration() const;
double GetBarDuration() const;
private:
void PublishSignatureChange();
double mTempo;
int mUpperTimeSignature;
int mLowerTimeSignature;
};
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