Method paintEvent

src/gui/ClientEqOutputFader.cpp:191–287

}

void ClientEqOutputFader::paintEvent(QPaintEvent*)
{
    QPainter p(this);
    p.setRenderHint(QPainter::Antialiasing, false);
    p.setRenderHint(QPainter::TextAntialiasing, true);

    // The strip lives between the OUT label at the top and the value
    // label at the bottom — paintEvent receives the full widget rect and
    // we carve out a fixed vertical band in the middle.
    const int topLabelH = 16;
    const int botLabelH = 14;
    const int stripTop  = topLabelH + kStripTopPad;
    const int stripBot  = height() - botLabelH - kStripBottomPad;
    m_stripTop = stripTop;
    m_stripH   = std::max(1, stripBot - stripTop);

    const int barLeft = kLabelColW + kGap + kHandleOverhang;
    const QRect barR(barLeft, stripTop, kBarW, m_stripH);

    // Background for the bar — dark inset.
    p.fillRect(barR, QColor("#06111c"));

    // Level fill — gradient bottom green → top red, clipped to the level
    // height derived from the smoothed peak.
    const float peakNorm = std::clamp(
        (m_smoothedPeak - kMeterMinDb) / (kMeterMaxDb - kMeterMinDb),
        0.0f, 1.0f);
    const int fillH = static_cast<int>(peakNorm * m_stripH);
    if (fillH > 0) {
        const QRect fill(barR.x(), barR.y() + m_stripH - fillH,
                         kBarW, fillH);
        QLinearGradient grad(0, barR.y() + m_stripH, 0, barR.y());
        grad.setColorAt(0.0, QColor("#2f9e6a"));   // green bottom
        grad.setColorAt(0.55, QColor("#6cc56a"));  // lime
        grad.setColorAt(0.80, QColor("#e8b94c"));  // amber
        grad.setColorAt(0.95, QColor("#e8553c"));  // red top
        grad.setColorAt(1.0, QColor("#f2362a"));
        p.fillRect(fill, grad);
    }

    // Bar outline.
    p.setPen(QPen(QColor("#243a4e"), 1));
    p.setBrush(Qt::NoBrush);
    p.drawRect(barR.adjusted(0, 0, -1, -1));

    // dB scale labels + tick marks on the left side.
    QFont f = p.font();
    f.setPixelSize(8);
    p.setFont(f);
    const QFontMetrics fm(f);
    const int textRight = kLabelColW - 2;

    struct Tick { float db; const char* label; };
    static constexpr Tick kTicks[] = {
        {   0.0f,  "0" },
        {  -6.0f,  "-6" },
        { -12.0f,  "-12" },
        { -20.0f,  "-20" },