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/**********************************************************************
Audacity: A Digital Audio Editor
ProjectSelectionManager.cpp
Paul Licameli split from ProjectManager.cpp
**********************************************************************/
#ifndef __AUDACITY_PROJECT_SELECTION_MANAGER__
#define __AUDACITY_PROJECT_SELECTION_MANAGER__
#include "ClientData.h" // to inherit
#include "Observer.h"
#include "ComponentInterfaceSymbol.h"
#include "Observer.h"
class AudacityProject;
struct ProjectNumericFormatsEvent;
//! This object is useful mostly as an observer of others in the project
/*!
It listens for changes of selection formats and snap-to choices, and reacts
by updating persistent preferences, and updating the time selection to be
consistent with those choices.
*/
class TIME_FREQUENCY_SELECTION_API ProjectSelectionManager final
: public ClientData::Base
{
public:
static ProjectSelectionManager &Get( AudacityProject &project );
static const ProjectSelectionManager &Get( const AudacityProject &project );
explicit ProjectSelectionManager(AudacityProject &project);
ProjectSelectionManager(const ProjectSelectionManager &) = delete;
ProjectSelectionManager &operator=(
const ProjectSelectionManager &) = delete;
~ProjectSelectionManager() override;
void ModifySelection(double &start, double &end, bool done);
void ModifySpectralSelection(double nyquist,
double &bottom, double &top, bool done);
private:
void OnFormatsChanged(ProjectNumericFormatsEvent);
void SetSelectionFormat(const NumericFormatID & format);
void SetAudioTimeFormat(const NumericFormatID & format);
void SetFrequencySelectionFormatName(
const NumericFormatID & formatName);
void SetBandwidthSelectionFormatName(
const NumericFormatID & formatName);
void SnapSelection();
Observer::Subscription mFormatsSubscription;
AudacityProject &mProject;
Observer::Subscription mSnappingChangedSubscription;
Observer::Subscription mTimeSignatureChangedSubscription;
Observer::Subscription mProjectRateChangedSubscription;
};
#endif
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