temporuler.cpp

LINUX下的混音软件

        }

        return ;
    }
}

void
TempoRuler::mouseMoveEvent(QMouseEvent *e)
{
    bool shiftPressed = ((e->state() & Qt::ShiftButton) != 0);

    if (m_dragVert) {

        if (shiftPressed != m_dragFine) {

            m_dragFine = shiftPressed;
            m_dragStartY = e->y();

            // reset the start tempi to whatever we last updated them
            // to as we switch into or out of fine mode
            int tcn = m_composition->getTempoChangeNumberAt(m_dragStartTime);
            std::pair<timeT, tempoT> tc = m_composition->getTempoChange(tcn);
            std::pair<bool, tempoT> tr = m_composition->getTempoRamping(tcn, true);
            m_dragStartTempo = tc.second;
            m_dragStartTarget = tr.first ? tr.second : -1;
        }

        int diff = m_dragStartY - e->y(); // +ve for upwards drag
        tempoT newTempo = m_dragStartTempo;
        tempoT newTarget = m_dragStartTarget;

        if (diff != 0) {

            float qpm = m_composition->getTempoQpm(newTempo);

            if (m_dragTarget && newTarget > 0) {
                qpm = m_composition->getTempoQpm(newTarget);
            }

            float qdiff = (m_dragFine ? diff * 0.05 : diff * 0.5);
            qpm += qdiff;
            if (qpm < 1)
                qpm = 1;

            if (m_dragTarget) {

                newTarget = m_composition->getTempoForQpm(qpm);

            } else {

                newTempo = m_composition->getTempoForQpm(qpm);

                if (newTarget >= 0) {
                    qpm = m_composition->getTempoQpm(newTarget);
                    qpm += qdiff;
                    if (qpm < 1)
                        qpm = 1;
                    newTarget = m_composition->getTempoForQpm(qpm);
                }
            }
        }

        showTextFloat(newTempo, newTarget, m_dragStartTime);
        m_composition->addTempoAtTime(m_dragStartTime, newTempo, newTarget);
        update();

    } else if (m_dragHoriz) {

        int x = e->x();

        SnapGrid grid(m_rulerScale);
        if (shiftPressed) {
            grid.setSnapTime(SnapGrid::NoSnap);
        } else {
            grid.setSnapTime(SnapGrid::SnapToUnit);
        }
        timeT newTime = grid.snapX(x - m_currentXOffset - m_xorigin,
                                   SnapGrid::SnapEither);

        int tcn = m_composition->getTempoChangeNumberAt(m_dragPreviousTime);
        int ncn = m_composition->getTempoChangeNumberAt(newTime);
        if (ncn > tcn || ncn < tcn - 1)
            return ;
        if (ncn >= 0 && ncn == tcn - 1) {
            std::pair<timeT, tempoT> nc = m_composition->getTempoChange(ncn);
            if (nc.first == newTime)
                return ;
        }

        //	std::cerr << " -> " << newTime << std::endl;

        m_composition->removeTempoChange(tcn);
        m_composition->addTempoAtTime(newTime,
                                      m_dragStartTempo,
                                      m_dragStartTarget);
        showTextFloat(m_dragStartTempo, m_dragStartTarget, newTime, true);
        m_dragPreviousTime = newTime;
        update();

    } else {

        int x = e->x() + 1;
        timeT t = m_rulerScale->getTimeForX(x - m_currentXOffset - m_xorigin);
        int tcn = m_composition->getTempoChangeNumberAt(t);

        if (tcn < 0 || tcn >= m_composition->getTempoChangeCount())
            return ;

        std::pair<timeT, tempoT> tc = m_composition->getTempoChange(tcn);
        std::pair<bool, tempoT> tr = m_composition->getTempoRamping(tcn, true);

        int bar, beat, fraction, remainder;
        m_composition->getMusicalTimeForAbsoluteTime(tc.first, bar, beat,
                fraction, remainder);
        RG_DEBUG << "Tempo change: tempo " << m_composition->getTempoQpm(tc.second) << " at " << bar << ":" << beat << ":" << fraction << ":" << remainder << endl;

        m_illuminate = tcn;
        m_illuminatePoint = false;
        m_illuminateTarget = false;
        //!!!	m_refreshLinesOnly = true;

        //!!! merge this test with the one in mousePressEvent as
        //isCloseToStart or equiv, and likewise for close to end

        int px = m_rulerScale->getXForTime(tc.first) + m_currentXOffset + m_xorigin;
        if (x >= px && x < px + 5) {
            m_illuminatePoint = true;
        } else {
            timeT nt = m_composition->getEndMarker();
            if (tcn < m_composition->getTempoChangeCount() - 1) {
                nt = m_composition->getTempoChange(tcn + 1).first;
            }
            int nx = m_rulerScale->getXForTime(nt) + m_currentXOffset + m_xorigin;
            if (x > px + 5 && x > nx - 5) {
                m_illuminateTarget = true;
            }

            //	    std::cerr << "nt = " << nt << ", nx = " << nx << ", x = " << x << ", m_illuminateTarget = " << m_illuminateTarget << std::endl;
        }

        showTextFloat(tc.second, tr.first ? tr.second : -1,
                      tc.first, m_illuminatePoint);

        update();
    }
}

void
TempoRuler::wheelEvent(QWheelEvent *e)
{}

void
TempoRuler::enterEvent(QEvent *)
{
    setMouseTracking(true);
}

void
TempoRuler::leaveEvent(QEvent *)
{
    if (!m_dragVert && !m_dragHoriz) {
        setMouseTracking(false);
        m_illuminate = -1;
        m_illuminatePoint = false;
        //!!!	m_refreshLinesOnly = true;
        m_textFloat->hide();
        update();
    }
}

void
TempoRuler::showTextFloat(tempoT tempo, tempoT target,
                          timeT time, bool showTime)
{
    float qpm = m_composition->getTempoQpm(tempo);
    int qi = int(qpm + 0.0001);
    int q0 = int(qpm * 10 + 0.0001) % 10;
    int q00 = int(qpm * 100 + 0.0001) % 10;

    bool haveSet = false;

    QString tempoText, timeText;

    if (time >= 0) {

        if (showTime) {
            int bar, beat, fraction, remainder;
            m_composition->getMusicalTimeForAbsoluteTime
            (time, bar, beat, fraction, remainder);
            RealTime rt = m_composition->getElapsedRealTime(time);

            // blargh -- duplicated with TempoView::makeTimeString
            timeText = QString("%1%2%3-%4%5-%6%7-%8%9")
                       .arg(bar / 100)
                       .arg((bar % 100) / 10)
                       .arg(bar % 10)
                       .arg(beat / 10)
                       .arg(beat % 10)
                       .arg(fraction / 10)
                       .arg(fraction % 10)
                       .arg(remainder / 10)
                       .arg(remainder % 10);

            timeText = QString("%1\n%2")
                       .arg(timeText)
                       //		.arg(rt.toString().c_str());
                       .arg(rt.toText(true).c_str());
        }

        TimeSignature sig =
            m_composition->getTimeSignatureAt(time);

        if (sig.getBeatDuration() !=
                Note(Note::Crotchet).getDuration()) {

            float bpm =
                (qpm *
                 Note(Note::Crotchet).getDuration())
                / sig.getBeatDuration();
            int bi = int(bpm + 0.0001);
            int b0 = int(bpm * 10 + 0.0001) % 10;
            int b00 = int(bpm * 100 + 0.0001) % 10;

            tempoText = i18n("%1.%2%3 (%4.%5%6 bpm)")
                        .arg(qi).arg(q0).arg(q00)
                        .arg(bi).arg(b0).arg(b00);
            haveSet = true;
        }
    }

    if (!haveSet) {
        tempoText = i18n("%1.%2%3 bpm").arg(qi).arg(q0).arg(q00);
    }

    if (target > 0 && target != tempo) {
        float tq = m_composition->getTempoQpm(target);
        int tqi = int(tq + 0.0001);
        int tq0 = int(tq * 10 + 0.0001) % 10;
        int tq00 = int(tq * 100 + 0.0001) % 10;
        tempoText = i18n("%1 - %2.%3%4").arg(tempoText).arg(tqi).arg(tq0).arg(tq00);
    }

    if (showTime && time >= 0) {
        m_textFloat->setText(QString("%1\n%2").arg(timeText).arg(tempoText));
    } else {
        m_textFloat->setText(tempoText);
    }

    QPoint cp = mapFromGlobal(QPoint(QCursor::pos()));
    //    std::cerr << "cp = " << cp.x() << "," << cp.y() << ", tempo = " << qpm << std::endl;
    QPoint mp = cp + pos();

    QWidget *parent = parentWidget();
    while (parent->parentWidget() &&
            !parent->isTopLevel() &&
            !parent->isDialog()) {
        mp += parent->pos();
        parent = parent->parentWidget();
    }

    int yoff = cp.y() + m_textFloat->height() + 3;
    mp = QPoint(mp.x() + 10, mp.y() > yoff ? mp.y() - yoff : 0);

    m_textFloat->move(mp);
    m_textFloat->show();
}

QSize
TempoRuler::sizeHint() const
{
    double width =
        m_rulerScale->getBarPosition(m_rulerScale->getLastVisibleBar()) +
        m_rulerScale->getBarWidth(m_rulerScale->getLastVisibleBar()) +
        m_xorigin;

    QSize res(std::max(int(width), m_width), m_height);

    return res;
}

QSize
TempoRuler::minimumSizeHint() const
{
    double firstBarWidth = m_rulerScale->getBarWidth(0) + m_xorigin;
    QSize res = QSize(int(firstBarWidth), m_height);
    return res;
}

int
TempoRuler::getYForTempo(tempoT tempo)
{
    int drawh = height() - 4;
    int y = drawh / 2;

    tempoT minTempo = m_composition->getMinTempo();
    tempoT maxTempo = m_composition->getMaxTempo();

    if (maxTempo > minTempo) {
        y = drawh -
            int((double(tempo - minTempo) / double(maxTempo - minTempo))
                * drawh + 0.5);
    }

    return y;
}

tempoT
TempoRuler::getTempoForY(int y)
{
    int drawh = height() - 4;

    tempoT minTempo = m_composition->getMinTempo();
    tempoT maxTempo = m_composition->getMaxTempo();

    tempoT tempo = minTempo;

    if (maxTempo > minTempo) {
        tempo = (maxTempo - minTempo) *
                (double(drawh - y) / double(drawh)) + minTempo + 0.5;
    }

    return tempo;
}

void
TempoRuler::paintEvent(QPaintEvent* e)
{
    QRect clipRect = e->rect();

    if (m_buffer.width() < width() || m_buffer.height() < height()) {
        m_buffer = QPixmap(width(), height());
    }

    m_buffer.fill(GUIPalette::getColour
                  (GUIPalette::TextRulerBackground));

    QPainter paint(&m_buffer);
    paint.setPen(GUIPalette::getColour
                 (GUIPalette::TextRulerForeground));

    paint.setClipRegion(e->region());
    paint.setClipRect(clipRect);

    if (m_xorigin > 0) {
        paint.fillRect(0, 0, m_xorigin, height(), paletteBackgroundColor());
    }

    timeT from = m_rulerScale->getTimeForX
                 (clipRect.x() - m_currentXOffset - 100 - m_xorigin);
    timeT to = m_rulerScale->getTimeForX
               (clipRect.x() + clipRect.width() - m_currentXOffset + 100 - m_xorigin);

    QRect boundsForHeight = m_fontMetrics.boundingRect("019");
    int fontHeight = boundsForHeight.height();
    int textY = fontHeight + 2;

    double prevEndX = -1000.0;
    double prevTempo = 0.0;
    long prevBpm = 0;

    typedef std::map<timeT, int> TimePoints;
    int tempoChangeHere = 1;
    int timeSigChangeHere = 2;
    TimePoints timePoints;