Kwave::UndoDeleteTrack Class Reference

#include <UndoDeleteTrack.h>

Inheritance diagram for Kwave::UndoDeleteTrack:

Collaboration diagram for Kwave::UndoDeleteTrack:

Public Member Functions
	UndoDeleteTrack (Kwave::Signal &signal, unsigned int track)
virtual	~UndoDeleteTrack () Q_DECL_OVERRIDE
virtual QString	description () Q_DECL_OVERRIDE
virtual qint64	undoSize () Q_DECL_OVERRIDE
virtual qint64	redoSize () Q_DECL_OVERRIDE
virtual bool	store (SignalManager &manager) Q_DECL_OVERRIDE
virtual Kwave::UndoAction *	undo (Kwave::SignalManager &manager, bool with_redo) Q_DECL_OVERRIDE
Public Member Functions inherited from Kwave::UndoAction
virtual	~UndoAction ()
virtual bool	containsModification () const
virtual void	dump (const QString &indent)

Protected Attributes
Kwave::Signal &	m_signal
unsigned int	m_track
sample_index_t	m_length
QList< Kwave::Stripe::List >	m_stripes
QUuid	m_uuid

Detailed Description

Undo action for deleting a track.

Definition at line 39 of file UndoDeleteTrack.h.

Constructor & Destructor Documentation

UndoDeleteTrack()

Kwave::UndoDeleteTrack::UndoDeleteTrack	(	Kwave::Signal &	signal,
		unsigned int	track
	)

Constructor

Parameters

signal	reference to the signal
track	index of the deleted track.

Definition at line 30 of file UndoDeleteTrack.cpp.

    :UndoAction(), m_signal(signal), m_track(track),
     m_length(signal.length()), m_stripes(), m_uuid(signal.uuidOfTrack(track))
{
}

~UndoDeleteTrack()

Kwave::UndoDeleteTrack::~UndoDeleteTrack ( )

virtual

Destructor

Definition at line 38 of file UndoDeleteTrack.cpp.

{
}

Member Function Documentation

description()

QString Kwave::UndoDeleteTrack::description ( )

virtual

Returns a verbose short description of the action.

Implements Kwave::UndoAction.

Definition at line 43 of file UndoDeleteTrack.cpp.

{
    return i18n("Delete Track");
}

redoSize()

qint64 Kwave::UndoDeleteTrack::redoSize ( )

virtual

See also

UndoAction::redoSize()

Implements Kwave::UndoAction.

Definition at line 55 of file UndoDeleteTrack.cpp.

{
    return sizeof(Kwave::UndoInsertTrack);
}

store()

bool Kwave::UndoDeleteTrack::store ( Kwave::SignalManager &  manager )

virtual

See also

UndoAction::store()

Implements Kwave::UndoAction.

Definition at line 61 of file UndoDeleteTrack.cpp.

References m_length, m_stripes, m_track, and Kwave::SignalManager::stripes().

{
    if (!m_length) return true; // shortcut: this is an empty action

    // fork off a multi track stripe list for the selected range
    QList<unsigned int> track_list;
    track_list.append(m_track);
    m_stripes = manager.stripes(track_list, 0, m_length - 1);
    if (m_stripes.isEmpty())
        return false; // retrieving the stripes failed

    return true;
}

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undo()

Kwave::UndoAction * Kwave::UndoDeleteTrack::undo ( Kwave::SignalManager &  manager, bool  with_redo  )

virtual

See also

UndoAction::undo()

Implements Kwave::UndoAction.

Definition at line 76 of file UndoDeleteTrack.cpp.

References Kwave::Signal::insertTrack(), m_length, m_signal, m_stripes, m_track, m_uuid, Kwave::SignalManager::mergeStripes(), and Kwave::UndoAction::store().

{
    Kwave::UndoAction *redo_action = Q_NULLPTR;

    // create a redo action
    if (with_redo) {
        redo_action =
            new(std::nothrow) Kwave::UndoInsertTrack(m_signal, m_track);
        Q_ASSERT(redo_action);
        if (redo_action) redo_action->store(manager);
    }

    // insert an empty track into the signal
    m_signal.insertTrack(m_track, m_length, &m_uuid);

    // merge the stripes back into the signal
    QList<unsigned int> track_list;
    track_list.append(m_track);
    if (!manager.mergeStripes(m_stripes, track_list)) {
        qWarning("UndoDeleteTrack::undo() FAILED [mergeStripes]");
        delete redo_action;
        return Q_NULLPTR;
    }

    return redo_action;
}

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undoSize()

qint64 Kwave::UndoDeleteTrack::undoSize ( )

virtual

See also

UndoAction::undoSize()

Implements Kwave::UndoAction.

Definition at line 49 of file UndoDeleteTrack.cpp.

References m_length.

{
    return sizeof(*this) + m_length * sizeof(sample_t);
}

Member Data Documentation

m_length

sample_index_t Kwave::UndoDeleteTrack::m_length

protected

Length of the track in samples

Definition at line 80 of file UndoDeleteTrack.h.

Referenced by store(), undo(), and undoSize().

m_signal

Kwave::Signal& Kwave::UndoDeleteTrack::m_signal

protected

Reference to the signal

Definition at line 74 of file UndoDeleteTrack.h.

Referenced by undo().

m_stripes

QList<Kwave::Stripe::List> Kwave::UndoDeleteTrack::m_stripes

protected

storage for all deleted stripes

Definition at line 83 of file UndoDeleteTrack.h.

Referenced by store(), and undo().

m_track

unsigned int Kwave::UndoDeleteTrack::m_track

protected

Index of the deleted track

Definition at line 77 of file UndoDeleteTrack.h.

Referenced by store(), and undo().

m_uuid

QUuid Kwave::UndoDeleteTrack::m_uuid

protected

unique ID of the deleted track

Definition at line 86 of file UndoDeleteTrack.h.

Referenced by undo().

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The documentation for this class was generated from the following files:

• libkwave/undo/UndoDeleteTrack.h
• libkwave/undo/UndoDeleteTrack.cpp