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137 lines
3.9 KiB
137 lines
3.9 KiB
/*
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Rosegarden
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A MIDI and audio sequencer and musical notation editor.
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This program is Copyright 2000-2008
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Guillaume Laurent <glaurent@telegraph-road.org>,
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Chris Cannam <cannam@all-day-breakfast.com>,
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Richard Bown <richard.bown@ferventsoftware.com>
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The moral rights of Guillaume Laurent, Chris Cannam, and Richard
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Bown to claim authorship of this work have been asserted.
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Other copyrights also apply to some parts of this work. Please
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see the AUTHORS file and individual file headers for details.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#include "RescaleCommand.h"
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#include "base/Event.h"
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#include "base/Segment.h"
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#include "base/Selection.h"
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#include "document/BasicCommand.h"
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#include <tqstring.h>
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namespace Rosegarden
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{
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RescaleCommand::RescaleCommand(EventSelection &sel,
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timeT newDuration,
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bool closeGap) :
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BasicCommand(getGlobalName(), sel.getSegment(),
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sel.getStartTime(),
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getAffectedEndTime(sel, newDuration, closeGap),
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true),
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m_selection(&sel),
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m_oldDuration(sel.getTotalDuration()),
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m_newDuration(newDuration),
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m_closeGap(closeGap)
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{
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// nothing else
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}
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timeT
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RescaleCommand::getAffectedEndTime(EventSelection &sel,
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timeT newDuration,
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bool closeGap)
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{
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timeT preScaleEnd = sel.getEndTime();
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if (closeGap)
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preScaleEnd = sel.getSegment().getEndMarkerTime();
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// dupe of rescale(), but we can't use that here as the m_
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// variables may not have been set
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double d = preScaleEnd;
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d *= newDuration;
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d /= sel.getTotalDuration();
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d += 0.5;
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timeT postScaleEnd = (timeT)d;
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return std::max(preScaleEnd, postScaleEnd);
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}
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timeT
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RescaleCommand::rescale(timeT t)
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{
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// avoid overflows by using doubles
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double d = t;
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d *= m_newDuration;
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d /= m_oldDuration;
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d += 0.5;
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return (timeT)d;
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}
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void
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RescaleCommand::modifySegment()
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{
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if (m_oldDuration == m_newDuration)
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return ;
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timeT startTime = m_selection->getStartTime();
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timeT diff = m_newDuration - m_oldDuration;
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std::vector<Event *> toErase;
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std::vector<Event *> toInsert;
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Segment &segment = m_selection->getSegment();
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for (EventSelection::eventcontainer::iterator i =
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m_selection->getSegmentEvents().begin();
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i != m_selection->getSegmentEvents().end(); ++i) {
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toErase.push_back(*i);
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timeT t = (*i)->getAbsoluteTime() - startTime;
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timeT d = (*i)->getDuration();
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t = rescale(t);
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d = rescale(d);
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toInsert.push_back(new Event(**i, startTime + t, d));
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}
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if (m_closeGap) {
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for (Segment::iterator i = segment.findTime(startTime + m_oldDuration);
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i != segment.end(); ++i) {
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// move all events including any following the end marker
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toErase.push_back(*i);
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toInsert.push_back((*i)->copyMoving(diff));
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}
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}
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for (std::vector<Event *>::iterator i = toErase.begin(); i != toErase.end(); ++i) {
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m_selection->removeEvent(*i); // remove from selection
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segment.eraseSingle(*i);
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}
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for (std::vector<Event *>::iterator i = toInsert.begin(); i != toInsert.end(); ++i) {
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segment.insert(*i);
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m_selection->addEvent(*i); // add to selection
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}
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if (m_closeGap && diff > 0) {
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segment.setEndMarkerTime(startTime +
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rescale(segment.getEndMarkerTime() - startTime));
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}
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segment.normalizeRests(getStartTime(), getEndTime());
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}
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}
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