linedstaff.cpp

LINUX下的混音软件

    int testMd = 1000;

    for (i = -1; i <= 1; ++i) {
        int d = y - getCanvasYForHeight(ph + i, x, y);
        if (d < 0)
            d = -d;
        if (d < md) {
            md = d;
            mi = i;
        }
        if (d < testMd) {
            testMd = d;
            testi = i;
        }
    }

    if (mi > -2) {
        //         RG_DEBUG << "LinedStaff::getHeightAtCanvasCoords: " << y
        //                              << " -> " << (ph + mi) << " (mi is " << mi << ", distance "
        //                              << md << ")" << endl;
        //         if (mi == 0) {
        //             RG_DEBUG << "GOOD APPROXIMATION" << endl;
        //         } else {
        //             RG_DEBUG << "BAD APPROXIMATION" << endl;
        //         }
        return ph + mi;
    } else {
        RG_DEBUG << "LinedStaff::getHeightAtCanvasCoords: heuristic got " << ph << ", nothing within range (closest was " << (ph + testi) << " which is " << testMd << " away)" << endl;
        return 0;
    }
}

QRect
LinedStaff::getBarExtents(double x, int y) const
{
    int row = getRowForCanvasCoords(x, y);

    for (int i = 1; i < m_barLines.size(); ++i) {

        double layoutX = m_barLines[i]->getLayoutX();
        int barRow = getRowForLayoutX(layoutX);

        if (m_pageMode != LinearMode && (barRow < row))
            continue;

        BarLine *line = m_barLines[i];

        if (line) {
            if (line->x() <= x)
                continue;

            return QRect(int(m_barLines[i -1]->x()),
                         getCanvasYForTopOfStaff(barRow),
                         int(line->x() - m_barLines[i - 1]->x()),
                         getHeightOfRow());
        }
    }

    // failure
    return QRect(int(getX() + getMargin()), getCanvasYForTopOfStaff(), 4, getHeightOfRow());
}

double
LinedStaff::getCanvasXForLayoutX(double x) const
{
    switch (m_pageMode) {

    case ContinuousPageMode:
        return m_x + x - (m_pageWidth * getRowForLayoutX(x));

    case MultiPageMode: {
            int pageNo = getRowForLayoutX(x) / getRowsPerPage();
            double cx = m_x + x - (m_pageWidth * getRowForLayoutX(x));
            cx += m_margin + (m_margin * 2 + m_pageWidth) * pageNo;
            return cx;
        }

    case LinearMode:
    default:
        return m_x + x;
    }
}

LinedStaff::LinedStaffCoords

LinedStaff::getLayoutCoordsForCanvasCoords(double x, int y) const
{
    int row = getRowForCanvasCoords(x, y);
    return LinedStaffCoords
           ((row * m_pageWidth) + x - getCanvasXForLeftOfRow(row),
            y - getCanvasYForTopOfStaff(row));
}

LinedStaff::LinedStaffCoords

LinedStaff::getCanvasCoordsForLayoutCoords(double x, int y) const
{
    int row = getRowForLayoutX(x);
    return LinedStaffCoords
           (getCanvasXForLayoutX(x), getCanvasYForTopLine(row) + y);
}

int
LinedStaff::getRowForCanvasCoords(double x, int y) const
{
    switch (m_pageMode) {

    case ContinuousPageMode:
        return ((y - m_y) / m_rowSpacing);

    case MultiPageMode: {
            int px = int(x - m_x - m_margin);
            int pw = int(m_margin * 2 + m_pageWidth);
            if (px < pw)
                y -= m_titleHeight;
            return (getRowsPerPage() * (px / pw)) + ((y - m_y) / m_rowSpacing);
        }

    case LinearMode:
    default:
        return (int)((x - m_x) / m_pageWidth);
    }
}

int
LinedStaff::getCanvasYForTopOfStaff(int row) const
{
    switch (m_pageMode) {

    case ContinuousPageMode:
        if (row <= 0)
            return m_y;
        else
            return m_y + (row * m_rowSpacing);

    case MultiPageMode:
        if (row <= 0)
            return m_y + m_titleHeight;
        else if (row < getRowsPerPage())
            return m_y + ((row % getRowsPerPage()) * m_rowSpacing) + m_titleHeight;
        else
            return m_y + ((row % getRowsPerPage()) * m_rowSpacing);

    case LinearMode:
    default:
        return m_y;
    }
}

double
LinedStaff::getCanvasXForLeftOfRow(int row) const
{
    switch (m_pageMode) {

    case ContinuousPageMode:
        return m_x;

    case MultiPageMode:
        return m_x + m_margin +
               (m_margin*2 + m_pageWidth) * (row / getRowsPerPage());

    case LinearMode:
    default:
        return m_x + (row * m_pageWidth);
    }
}

void
LinedStaff::sizeStaff(HorizontalLayoutEngine &layout)
{
    Profiler profiler("LinedStaff::sizeStaff", true);

    deleteBars();
    deleteRepeatedClefsAndKeys();
    deleteTimeSignatures();

    //    RG_DEBUG << "LinedStaff::sizeStaff" << endl;

    int lastBar = layout.getLastVisibleBarOnStaff(*this);

    double xleft = 0, xright = 0;
    bool haveXLeft = false;

    xright = layout.getBarPosition(lastBar) - 1;

    TimeSignature currentTimeSignature;

    for (int barNo = layout.getFirstVisibleBarOnStaff(*this);
            barNo <= lastBar; ++barNo) {

        double x = layout.getBarPosition(barNo);

        if (!haveXLeft) {
            xleft = x;
            haveXLeft = true;
        }

        double timeSigX = 0;
        TimeSignature timeSig;
        bool isNew = layout.getTimeSignaturePosition(*this, barNo, timeSig, timeSigX);

        if (isNew && barNo < lastBar) {
            currentTimeSignature = timeSig;
            insertTimeSignature(timeSigX, currentTimeSignature);
        }

        RG_DEBUG << "LinedStaff::sizeStaff: inserting bar at " << x << " on staff " << this << " (isNew " << isNew << ", timeSigX " << timeSigX << ")" << endl;

        bool showBarNo =
            (showBarNumbersEvery() > 0 &&
             ((barNo + 1) % showBarNumbersEvery()) == 0);

        insertBar(x,
                  ((barNo == lastBar) ? 0 :
                   (layout.getBarPosition(barNo + 1) - x)),
                  layout.isBarCorrectOnStaff(*this, barNo - 1),
                  currentTimeSignature,
                  barNo,
                  showBarNo);
    }

    m_startLayoutX = xleft;
    m_endLayoutX = xright;

    drawStaffName();
    resizeStaffLines();
}

void
LinedStaff::deleteBars()
{
    for (BarLineList::iterator i = m_barLines.begin();
            i != m_barLines.end(); ++i) {
        (*i)->hide();
        delete *i;
    }

    for (LineRecList::iterator i = m_beatLines.begin();
            i != m_beatLines.end(); ++i) {
        i->second->hide();
        delete i->second;
    }

    for (LineRecList::iterator i = m_barConnectingLines.begin();
            i != m_barConnectingLines.end(); ++i) {
        i->second->hide();
        delete i->second;
    }

    for (ItemList::iterator i = m_barNumbers.begin();
            i != m_barNumbers.end(); ++i) {
        (*i)->hide();
        delete *i;
    }

    m_barLines.clear();
    m_beatLines.clear();
    m_barConnectingLines.clear();
    m_barNumbers.clear();
}

void
LinedStaff::insertBar(double layoutX, double width, bool isCorrect,
                      const TimeSignature &timeSig,
                      int barNo, bool showBarNo)
{
    //    RG_DEBUG << "insertBar: " << layoutX << ", " << width
    //			 << ", " << isCorrect << endl;

    int barThickness = m_lineThickness * 5 / 4;

    // hack to ensure the bar line appears on the correct row in
    // notation page layouts, with a conditional to prevent us from
    // moving the bar and beat lines in the matrix
    if (!showBeatLines()) {
        if (width > 0.01) { // not final bar in staff
            layoutX += 1;
        } else {
            layoutX -= 1;
        }
    }

    int row = getRowForLayoutX(layoutX);
    double x = getCanvasXForLayoutX(layoutX);
    int y = getCanvasYForTopLine(row);

    bool firstBarInRow = false, lastBarInRow = false;

    if (m_pageMode != LinearMode &&
            (getRowForLayoutX(layoutX) >
             getRowForLayoutX(layoutX - getMargin() - 2)))
        firstBarInRow = true;

    if (m_pageMode != LinearMode &&
            width > 0.01 &&  // width == 0 for final bar in staff
            (getRowForLayoutX(layoutX) <
             getRowForLayoutX(layoutX + width + getMargin() + 2)))
        lastBarInRow = true;

    BarStyle style = getBarStyle(barNo);

    if (style == RepeatBothBar && firstBarInRow)
        style = RepeatStartBar;

    if (firstBarInRow)
        insertRepeatedClefAndKey(layoutX, barNo);

    // If we're supposed to be hiding bar lines, we do just that --
    // create them as normal, then hide them.  We can't simply not
    // create them because we rely on this to find bar extents for
    // things like double-click selection in notation.
    bool hidden = false;
    if (style == PlainBar && timeSig.hasHiddenBars())
        hidden = true;

    double inset = 0.0;
    if (style == RepeatStartBar || style == RepeatBothBar) {
        inset = getBarInset(barNo, firstBarInRow);
    }

    BarLine *line = new BarLine(m_canvas, layoutX,
                                getBarLineHeight(), barThickness, getLineSpacing(),
                                (int)inset, style);

    line->moveBy(x, y);

    if (isCorrect) {
        line->setPen(GUIPalette::getColour(GUIPalette::BarLine));
        line->setBrush(GUIPalette::getColour(GUIPalette::BarLine));
    } else {
        line->setPen(GUIPalette::getColour(GUIPalette::BarLineIncorrect));
        line->setBrush(GUIPalette::getColour(GUIPalette::BarLineIncorrect));
    }

    line->setZ( -1);
    if (hidden)
        line->hide();
    else
        line->show();

    // The bar lines have to be in order of layout-x (there's no
    // such interesting stipulation for beat or connecting lines)
    BarLineList::iterator insertPoint = lower_bound
                                        (m_barLines.begin(), m_barLines.end(), line, compareBars);
    m_barLines.insert(insertPoint, line);

    if (lastBarInRow) {

        double xe = x + width - barThickness;
        style = getBarStyle(barNo + 1);
        if (style == RepeatBothBar)
            style = RepeatEndBar;

        BarLine *eline = new BarLine(m_canvas, layoutX,
                                     getBarLineHeight(), barThickness, getLineSpacing(),
                                     0, style);
        eline->moveBy(xe, y);

        eline->setPen(GUIPalette::getColour(GUIPalette::BarLine));
        eline->setBrush(GUIPalette::getColour(GUIPalette::BarLine));

        eline->setZ( -1);
        if (hidden)
            eline->hide();
        else
            eline->show();

        BarLineList::iterator insertPoint = lower_bound
                                            (m_barLines.begin(), m_barLines.end(), eline, compareBars);
        m_barLines.insert(insertPoint, eline);
    }

    if (showBarNo) {

        QFont font;
        font.setPixelSize(m_resolution * 3 / 2);
        QFontMetrics metrics(font);
        QString text = QString("%1").arg(barNo + 1);

        QCanvasItem *barNoText = new QCanvasText(text, font, m_canvas);
        barNoText->setX(x);
        barNoText->setY(y - metrics.height() - m_resolution * 2);
        barNoText->setZ( -1);
        if (hidden)
            barNoText->hide();
        else
            barNoText->show();

        m_barNumbers.push_back(barNoText);
    }

    QCanvasRectangle *rect = 0;

    if (showBeatLines()) {

        double gridLines; // number of grid lines per bar may be fractional

        // If the snap time is zero we default to beat markers
        //
        if (m_snapGrid && m_snapGrid->getSnapTime(x))
            gridLines = double(timeSig.getBarDuration()) /
                        double(m_snapGrid->getSnapTime(x));
        else
            gridLines = timeSig.getBeatsPerBar();

        double dx = width / gridLines;