Method paintEvent

src/gui/ClientCompEditorCanvas.cpp:59–101

}

void ClientCompEditorCanvas::paintEvent(QPaintEvent* ev)
{
    ClientCompCurveWidget::paintEvent(ev);
    if (!m_comp) return;

    QPainter p(this);
    p.setRenderHint(QPainter::Antialiasing, true);

    // Threshold visual — full-height dashed amber guide line + a
    // chevron at the bottom.  Previously the handle was a tiny
    // triangle that was easy to miss; the guide line now reads as
    // "the threshold lives at this x" from a glance, and its whole
    // column is draggable (see thresholdHandleHit).
    const float T  = m_comp->thresholdDb();
    const float tx = dbToX(T);

    const float curveY = dbToY(std::clamp(curveOutputDb(T), kMinDb, kMaxDb));
    QColor guideColor = kThresholdHandle();
    guideColor.setAlpha(160);
    QPen guidePen(guideColor, 1.5, Qt::DashLine);
    guidePen.setDashPattern({4.0, 3.0});
    p.setPen(guidePen);
    p.drawLine(QPointF(tx, curveY), QPointF(tx, rect().bottom() - 8.0f));

    const float by = rect().bottom() - 2.0f;
    QPainterPath tri;
    tri.moveTo(tx,          by - 14.0f);
    tri.lineTo(tx - 9.0f,   by);
    tri.lineTo(tx + 9.0f,   by);
    tri.closeSubpath();
    p.setBrush(kThresholdHandle());
    p.setPen(QPen(kHandleOutline(), 1.5));
    p.drawPath(tri);

    // Ratio handle — larger filled dot at the knee centre so it reads
    // as "drag me to change the slope."  White outline so it stays
    // visible against the cyan curve even when GR is 0.
    const float outDb = curveOutputDb(T);
    const QPointF rh(tx, dbToY(outDb));
    p.setBrush(kRatioHandle());
    p.setPen(QPen(kHandleOutline(), 1.2));
    p.drawEllipse(rh, 6.5, 6.5);
}

void ClientCompEditorCanvas::mousePressEvent(QMouseEvent* ev)
{