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/*
Rosegarden
A MIDI and audio sequencer and musical notation editor.
This program is Copyright 2000-2008
Guillaume Laurent <[email protected]>,
Chris Cannam <[email protected]>,
Richard Bown <[email protected]>
The moral rights of Guillaume Laurent, Chris Cannam, and Richard
Bown to claim authorship of this work have been asserted.
Other copyrights also apply to some parts of this work. Please
see the AUTHORS file and individual file headers for details.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version. See the file
COPYING included with this distribution for more information.
*/
#include "SegmentRescaleCommand.h"
#include "misc/Strings.h"
#include "base/Event.h"
#include "base/Composition.h"
#include "base/NotationTypes.h"
#include "base/Segment.h"
#include <tqstring.h>
namespace Rosegarden
{
SegmentRescaleCommand::SegmentRescaleCommand(Segment *s,
int multiplier,
int divisor) :
KNamedCommand(getGlobalName()),
m_segment(s),
m_newSegment(0),
m_startTimeGiven(false),
m_startTime(s->getStartTime()),
m_multiplier(multiplier),
m_divisor(divisor),
m_detached(false)
{
// nothing
}
SegmentRescaleCommand::SegmentRescaleCommand(Segment *s,
int multiplier,
int divisor,
timeT st) :
KNamedCommand(getGlobalName()),
m_segment(s),
m_newSegment(0),
m_startTimeGiven(true),
m_startTime(st),
m_multiplier(multiplier),
m_divisor(divisor),
m_detached(false)
{
// nothing
}
SegmentRescaleCommand::~SegmentRescaleCommand()
{
if (m_detached) {
delete m_segment;
} else {
delete m_newSegment;
}
}
timeT
SegmentRescaleCommand::rescale(timeT t)
{
// avoid overflows by using doubles
double d = t;
d *= m_multiplier;
d /= m_divisor;
d += 0.5;
return (timeT)d;
}
void
SegmentRescaleCommand::execute()
{
timeT startTime = m_segment->getStartTime();
if (m_startTimeGiven) startTime = m_startTime;
if (!m_newSegment) {
m_newSegment = new Segment();
m_newSegment->setTrack(m_segment->getTrack());
TQString oldLabel = strtoqstr(m_segment->getLabel());
if (oldLabel.endsWith(i18n("(rescaled)"))) {
m_newSegment->setLabel(m_segment->getLabel());
} else {
m_newSegment->setLabel(qstrtostr(i18n("%1 (rescaled)").arg
(oldLabel)));
}
m_newSegment->setColourIndex(m_segment->getColourIndex());
for (Segment::iterator i = m_segment->begin();
m_segment->isBeforeEndMarker(i); ++i) {
if ((*i)->isa(Note::EventRestType))
continue;
timeT dt = (*i)->getAbsoluteTime() - startTime;
timeT duration = (*i)->getDuration();
//!!! use doubles for this calculation where necessary
m_newSegment->insert
(new Event(**i,
startTime + rescale(dt),
rescale(duration)));
}
}
m_segment->getComposition()->addSegment(m_newSegment);
m_segment->getComposition()->detachSegment(m_segment);
m_newSegment->normalizeRests(m_newSegment->getStartTime(),
m_newSegment->getEndTime());
m_newSegment->setEndMarkerTime
(startTime + rescale(m_segment->getEndMarkerTime() -
m_segment->getStartTime()));
m_detached = true;
}
void
SegmentRescaleCommand::unexecute()
{
m_newSegment->getComposition()->addSegment(m_segment);
m_newSegment->getComposition()->detachSegment(m_newSegment);
m_detached = false;
}
}
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