trackeditor.cpp

LINUX下的混音软件

                                InstrumentId id,
                                int position)
{
    Composition &comp = m_doc->getComposition();

    AddTracksCommand* command = new AddTracksCommand(&comp, nbNewTracks, id,
                                                     position);
    addCommandToHistory(command);
    slotReadjustCanvasSize();
}

void TrackEditor::slotDeleteTracks(std::vector<TrackId> tracks)
{
    Composition &comp = m_doc->getComposition();

    DeleteTracksCommand* command = new DeleteTracksCommand(&comp, tracks);
    addCommandToHistory(command);
}

void TrackEditor::addSegment(int track, int time, unsigned int duration)
{
    if (!m_doc)
        return ; // sanity check

    SegmentInsertCommand *command =
        new SegmentInsertCommand(m_doc, track, time, duration);

    addCommandToHistory(command);
}

void TrackEditor::slotSegmentOrderChanged(int section, int fromIdx, int toIdx)
{
    RG_DEBUG << QString("TrackEditor::segmentOrderChanged(section : %1, from %2, to %3)")
    .arg(section).arg(fromIdx).arg(toIdx) << endl;

    //!!! how do we get here? need to involve a command
    emit needUpdate();
}

void
TrackEditor::slotCanvasScrolled(int x, int y)
{
    // update the pointer position if the user is dragging it from the loop ruler
    if ((m_topStandardRuler && m_topStandardRuler->getLoopRuler() &&
         m_topStandardRuler->getLoopRuler()->hasActiveMousePress() &&
         !m_topStandardRuler->getLoopRuler()->getLoopingMode()) ||
        (m_bottomStandardRuler && m_bottomStandardRuler->getLoopRuler() &&
         m_bottomStandardRuler->getLoopRuler()->hasActiveMousePress() &&
         !m_bottomStandardRuler->getLoopRuler()->getLoopingMode())) {

        int mx = m_segmentCanvas->viewport()->mapFromGlobal(QCursor::pos()).x();
        m_segmentCanvas->setPointerPos(x + mx);

        // bad idea, creates a feedback loop
        // 	timeT t = m_segmentCanvas->grid().getRulerScale()->getTimeForX(x + mx);
        // 	slotSetPointerPosition(t);
    }
}

void
TrackEditor::slotSetPointerPosition(timeT position)
{
    SimpleRulerScale *ruler =
        dynamic_cast<SimpleRulerScale*>(m_rulerScale);

    if (!ruler)
        return ;

    double pos = m_segmentCanvas->grid().getRulerScale()->getXForTime(position);

    int currentPointerPos = m_segmentCanvas->getPointerPos();

    double distance = pos - currentPointerPos;
    if (distance < 0.0)
        distance = -distance;

    if (distance >= 1.0) {

        if (m_doc && m_doc->getSequenceManager() &&
            (m_doc->getSequenceManager()->getTransportStatus() != STOPPED)) {
            
            if (m_playTracking) {
                getSegmentCanvas()->slotScrollHoriz(int(double(position) / ruler->getUnitsPerPixel()));
            }
        } else if (!getSegmentCanvas()->isAutoScrolling()) {
            int newpos = int(double(position) / ruler->getUnitsPerPixel());
            //             RG_DEBUG << "TrackEditor::slotSetPointerPosition("
            //                      << position
            //                      << ") : calling canvas->slotScrollHoriz() "
            //                      << newpos << endl;
            getSegmentCanvas()->slotScrollHoriz(newpos);
        }

        m_segmentCanvas->setPointerPos(pos);
    }

}

void
TrackEditor::slotPointerDraggedToPosition(timeT position)
{
    int currentPointerPos = m_segmentCanvas->getPointerPos();

    double newPosition;

    if (handleAutoScroll(currentPointerPos, position, newPosition))
        m_segmentCanvas->setPointerPos(int(newPosition));
}

void
TrackEditor::slotLoopDraggedToPosition(timeT position)
{
    if (m_doc) {
        int currentEndLoopPos = m_doc->getComposition().getLoopEnd();
        double dummy;
        handleAutoScroll(currentEndLoopPos, position, dummy);
    }
}

bool TrackEditor::handleAutoScroll(int currentPosition, timeT newTimePosition, double &newPosition)
{
    SimpleRulerScale *ruler =
        dynamic_cast<SimpleRulerScale*>(m_rulerScale);

    if (!ruler)
        return false;

    newPosition = m_segmentCanvas->grid().getRulerScale()->getXForTime(newTimePosition);

    double distance = fabs(newPosition - currentPosition);

    bool moveDetected = distance >= 1.0;

    if (moveDetected) {

        if (m_doc && m_doc->getSequenceManager() &&
                (m_doc->getSequenceManager()->getTransportStatus() != STOPPED)) {

            if (m_playTracking) {
                getSegmentCanvas()->slotScrollHoriz(int(double(newTimePosition) / ruler->getUnitsPerPixel()));
            }
        } else {
            int newpos = int(double(newTimePosition) / ruler->getUnitsPerPixel());
            getSegmentCanvas()->slotScrollHorizSmallSteps(newpos);
            getSegmentCanvas()->doAutoScroll();
        }

    }

    return moveDetected;
}

void
TrackEditor::slotToggleTracking()
{
    m_playTracking = !m_playTracking;
}

void
TrackEditor::slotSetLoop(timeT start, timeT end)
{
    getTopStandardRuler()->getLoopRuler()->slotSetLoopMarker(start, end);
    getBottomStandardRuler()->getLoopRuler()->slotSetLoopMarker(start, end);
}

MultiViewCommandHistory*
TrackEditor::getCommandHistory()
{
    return m_doc->getCommandHistory();
}

void
TrackEditor::addCommandToHistory(KCommand *command)
{
    getCommandHistory()->addCommand(command);
}

void
TrackEditor::slotScrollToTrack(int track)
{
    // Find the vertical track pos
    int newY = track * getTrackCellHeight();

    RG_DEBUG << "TrackEditor::scrollToTrack(" << track <<
    ") scrolling to Y " << newY << endl;

    // Scroll the segment view; it will scroll tracks by connected signals
    //    slotVerticalScrollTrackButtons(newY);
    m_segmentCanvas->slotScrollVertSmallSteps(newY);
}

void
TrackEditor::slotDeleteSelectedSegments()
{
    KMacroCommand *macro = new KMacroCommand("Delete Segments");

    SegmentSelection segments =
        m_segmentCanvas->getSelectedSegments();

    if (segments.size() == 0)
        return ;

    SegmentSelection::iterator it;

    // Clear the selection before erasing the Segments
    // the selection points to
    //
    m_segmentCanvas->getModel()->clearSelected();

    // Create the compound command
    //
    for (it = segments.begin(); it != segments.end(); it++) {
        macro->addCommand(new SegmentEraseCommand(*it,
                          &m_doc->getAudioFileManager()));
    }

    addCommandToHistory(macro);

}

void
TrackEditor::slotTurnRepeatingSegmentToRealCopies()
{
    RG_DEBUG << "TrackEditor::slotTurnRepeatingSegmentToRealCopies" << endl;

    SegmentSelection segments =
        m_segmentCanvas->getSelectedSegments();

    if (segments.size() == 0)
        return ;

    QString text;

    if (segments.size() == 1)
        text = i18n("Turn Repeating Segment into Real Copies");
    else
        text = i18n("Turn Repeating Segments into Real Copies");

    KMacroCommand *macro = new KMacroCommand(text);

    SegmentSelection::iterator it = segments.begin();
    for (; it != segments.end(); it++) {
        if ((*it)->isRepeating()) {
            macro->addCommand(new SegmentRepeatToCopyCommand(*it));
        }
    }

    addCommandToHistory(macro);

}

void
TrackEditor::slotVerticalScrollTrackButtons(int y)
{
    m_trackButtonScroll->setContentsPos(0, y);
}

void TrackEditor::dragEnterEvent(QDragEnterEvent *event)
{
    event->accept(QUriDrag::canDecode(event) ||
                  QTextDrag::canDecode(event));
}

void TrackEditor::dropEvent(QDropEvent* event)
{
    QStrList uri;
    QString text;

    int heightAdjust = 0;
    //int widthAdjust = 0;

    // Adjust any drop event height position by visible rulers
    //
    if (m_topStandardRuler && m_topStandardRuler->isVisible())
        heightAdjust += m_topStandardRuler->height();

    if (m_tempoRuler && m_tempoRuler->isVisible())
        heightAdjust += m_tempoRuler->height();

    if (m_chordNameRuler && m_chordNameRuler->isVisible())
        heightAdjust += m_chordNameRuler->height();

    QPoint posInSegmentCanvas =
        m_segmentCanvas->viewportToContents
        (m_segmentCanvas->
         viewport()->mapFrom(this, event->pos()));

    int trackPos = m_segmentCanvas->grid().getYBin(posInSegmentCanvas.y());

    timeT time =
//        m_segmentCanvas->grid().getRulerScale()->
//        getTimeForX(posInSegmentCanvas.x());
        m_segmentCanvas->grid().snapX(posInSegmentCanvas.x());


    if (QUriDrag::decode(event, uri)) {
        RG_DEBUG << "TrackEditor::dropEvent() : got URI :"
        << uri.first() << endl;
        QString uriPath = uri.first();

        if (uriPath.endsWith(".rg")) {
            emit droppedDocument(uriPath);
        } else {

            QStrList uris;
            QString uri;
            if (QUriDrag::decode(event, uris)) uri = uris.first();
//            QUriDrag::decodeLocalFiles(event, files);
//            QString filePath = files.first();

            RG_DEBUG << "TrackEditor::dropEvent() : got URI: "
            << uri << endl;

            RG_DEBUG << "TrackEditor::dropEvent() : dropping at track pos = "
            << trackPos
            << ", time = "
            << time
            << ", x = "
            << event->pos().x()
            << ", mapped x = "
            << posInSegmentCanvas.x()
            << endl;

            Track* track = m_doc->getComposition().getTrackByPosition(trackPos);
            if (track) {
                QString audioText;
                QTextOStream t(&audioText);

                t << uri << "\n";
                t << track->getId() << "\n";
                t << time << "\n";

                emit droppedNewAudio(audioText);
            }

        }

    } else if (QTextDrag::decode(event, text)) {
        RG_DEBUG << "TrackEditor::dropEvent() : got text info " << endl;
        //<< text << endl;

        if (text.endsWith(".rg")) {
            emit droppedDocument(text);
            //
            // WARNING
            //
            // DO NOT PERFORM ANY OPERATIONS AFTER THAT
            // EMITTING THIS SIGNAL TRIGGERS THE LOADING OF A NEW DOCUMENT
            // AND AS A CONSEQUENCE THE DELETION OF THIS TrackEditor OBJECT
            //
        } else {

            QTextIStream s(&text);

            QString id;
            AudioFileId audioFileId;
            RealTime startTime, endTime;

            // read the audio info checking for end of stream
            s >> id;
            s >> audioFileId;
            s >> startTime.sec;
            s >> startTime.nsec;
            s >> endTime.sec;
            s >> endTime.nsec;

            if (id == "AudioFileManager") { // only create something if this is data from the right client


                // Drop this audio segment if we have a valid track number
                // (could also check for time limits too)
                //
                Track* track = m_doc->getComposition().getTrackByPosition(trackPos);
                if (track) {

                    RG_DEBUG << "TrackEditor::dropEvent() : dropping at track pos = "
                    << trackPos
                    << ", time = "
                    << time
                    << ", x = "
                    << event->pos().x()
                    << ", map = "
                    << posInSegmentCanvas.x()
                    << endl;

                    QString audioText;
                    QTextOStream t(&audioText);
                    t << audioFileId << "\n";
                    t << track->getId() << "\n";
                    t << time << "\n"; // time on canvas
                    t << startTime.sec << "\n";
                    t << startTime.nsec << "\n";
                    t << endTime.sec << "\n";
                    t << endTime.nsec << "\n";

                    emit droppedAudio(audioText);
                }

            } else {

                KMessageBox::sorry(this, i18n("You can't drop files into Rosegarden from this client.  Try using Konqueror instead."));

            }

        }

        // SEE WARNING ABOVE - DON'T DO ANYTHING, THIS OBJECT MAY NOT
        // EXIST AT THIS POINT.

    }
}

}
#include "TrackEditor.moc"