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/**********************************************************************
Audacity: A Digital Audio Editor
@file SyncLock.cpp
@brief Defines groupings of tracks that should keep contents synchronized
Paul Licameli split from Track.cpp
**********************************************************************/
#ifndef __AUDACITY_SYNC_LOCK__
#define __AUDACITY_SYNC_LOCK__
#include "Track.h" // for TrackIterRange
#include "AttachedVirtualFunction.h"
class AUDACITY_DLL_API SyncLock {
public:
//! @return pTrack is not null, sync lock is on, and some member of its group is selected
static bool IsSyncLockSelected( const Track *pTrack );
//! @return pTrack is not null, and is selected, or is sync-lock selected
static bool IsSelectedOrSyncLockSelected( const Track *pTrack );
/*! @pre `pTrack->GetOwner() != nullptr` */
static TrackIterRange< Track > Group( Track *pTrack );
/*! @copydoc Group */
static TrackIterRange< const Track > Group( const Track *pTrack )
{
return Group(const_cast<Track*>(pTrack)).Filter<const Track>();
}
};
//! Describes how a track participates in sync-lock groupings
enum class SyncLockPolicy {
Isolated, //!< Never part of a group
Grouped, //!< Can be part of a group
EndSeparator, //!< Delimits the end of a group (of which it is a part)
};
struct GetSyncLockPolicyTag;
//! Describe how this track participates in sync-lock groupings; defaults to Isolated
using GetSyncLockPolicy =
AttachedVirtualFunction<
GetSyncLockPolicyTag,
SyncLockPolicy,
const Track
>;
DECLARE_EXPORTED_ATTACHED_VIRTUAL(AUDACITY_DLL_API, GetSyncLockPolicy);
#endif
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