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/**********************************************************************
Audacity: A Digital Audio Editor
SelectionState.h
**********************************************************************/
#ifndef __AUDACITY_SELECTION_STATE__
#define __AUDACITY_SELECTION_STATE__
class AudacityProject;
class Track;
class TrackList;
class ViewInfo;
#include "ClientData.h"
#include <memory>
#include <vector>
// State relating to the set of selected tracks
class TRACK_SELECTION_API SelectionState final
: public ClientData::Base
{
public:
SelectionState() = default;
SelectionState( const SelectionState & ) = delete;
SelectionState &operator=( const SelectionState & ) = delete;
static SelectionState &Get( AudacityProject &project );
static const SelectionState &Get( const AudacityProject &project );
/*!
Set selection length to the length of a track -- but if sync-lock is turned
on, use the largest possible selection in the sync-lock group.
If it's a stereo track, do the same for the stereo channels.
*/
static void SelectTrackLength(
ViewInfo &viewInfo, Track &track, bool syncLocked);
void SelectTrack(
Track &track, bool selected, bool updateLastPicked );
// Inclusive range of tracks, the limits specified in either order:
void SelectRangeOfTracks
( TrackList &tracks, Track &sTrack, Track &eTrack );
void SelectNone( TrackList &tracks );
void ChangeSelectionOnShiftClick
( TrackList &tracks, Track &track );
void HandleListSelection(TrackList &tracks, ViewInfo &viewInfo,
Track &track, bool shift, bool ctrl, bool syncLocked);
private:
friend class SelectionStateChanger;
std::weak_ptr<Track> mLastPickedTrack;
};
// For committing or rolling-back of changes in selectedness of tracks.
// When rolling back, it is assumed that no tracks have been added or removed.
class TRACK_SELECTION_API SelectionStateChanger
{
public:
SelectionStateChanger( SelectionState &state, TrackList &tracks );
SelectionStateChanger( const SelectionStateChanger& ) = delete;
SelectionStateChanger &operator=( const SelectionStateChanger& ) = delete;
~SelectionStateChanger();
void Commit();
private:
SelectionState *mpState;
TrackList &mTracks;
std::weak_ptr<Track> mInitialLastPickedTrack;
std::vector<bool> mInitialTrackSelection;
};
#endif
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