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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************
Audacity: A Digital Audio Editor
ProjectSnap.h
Dmitry Vedenko
**********************************************************************/
#pragma once
#include "ClientData.h"
#include "Observer.h"
#include "SnapUtils.h"
class AudacityProject;
struct SnapChangedMessage final
{
SnapMode newSnapMode { SnapMode::SNAP_OFF };
Identifier newSnapTo { "seconds" };
};
//! Project snapping settings
class SNAPPING_API ProjectSnap final :
public ClientData::Base,
public Observer::Publisher<SnapChangedMessage>
{
public:
static ProjectSnap& Get(AudacityProject& project);
static const ProjectSnap& Get(const AudacityProject& project);
explicit ProjectSnap(const AudacityProject& project);
ProjectSnap(const ProjectSnap&) = delete;
ProjectSnap& operator=(const ProjectSnap&) = delete;
void SetSnapMode(SnapMode mode);
SnapMode GetSnapMode() const;
void SetSnapTo(Identifier snap);
Identifier GetSnapTo() const;
SnapResult SnapTime(double time) const;
SnapResult SingleStep(double time, bool upwards) const;
private:
const AudacityProject& mProject;
SnapMode mSnapMode { ReadSnapMode() };
Identifier mSnapTo { ReadSnapTo() };
};
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