Method paintEvent

src/gui/ClientRxChainWidget.cpp:570–746

}

void ClientRxChainWidget::paintEvent(QPaintEvent*)
{
    rebuildLayout();

    QPainter p(this);
    p.setRenderHint(QPainter::Antialiasing, true);
    p.fillRect(rect(), AetherSDR::ThemeManager::instance().color("color.background.0"));

    if (m_boxes.isEmpty()) return;

    // Connectors — same snake-aware logic as ClientChainWidget.
    auto drawArrowHead = [&](QPointF tip, QPointF from) {
        const QPointF dir = tip - from;
        const qreal   len = std::hypot(dir.x(), dir.y());
        if (len < 0.01) return;
        const QPointF u(dir.x() / len, dir.y() / len);
        const QPointF perp(-u.y(), u.x());
        QPainterPath head;
        head.moveTo(tip);
        head.lineTo(tip.x() - u.x() * kArrowTip + perp.x() * kArrowTip,
                    tip.y() - u.y() * kArrowTip + perp.y() * kArrowTip);
        head.lineTo(tip.x() - u.x() * kArrowTip - perp.x() * kArrowTip,
                    tip.y() - u.y() * kArrowTip - perp.y() * kArrowTip);
        head.closeSubpath();
        p.setBrush(kConnector());
        p.setPen(Qt::NoPen);
        p.drawPath(head);
    };

    p.setPen(QPen(kConnector(), 2.0));
    for (int i = 0; i + 1 < m_boxes.size(); ++i) {
        const QRectF a = m_boxes[i].rect;
        const QRectF b = m_boxes[i + 1].rect;
        const bool sameRow = qFuzzyCompare(a.center().y(), b.center().y());
        if (sameRow) {
            const bool rtl = a.center().x() > b.center().x();
            QPointF from, to;
            if (rtl) {
                from = QPointF(a.left(), a.center().y());
                to   = QPointF(b.right() + 1, b.center().y());
            } else {
                from = QPointF(a.right(), a.center().y());
                to   = QPointF(b.left() - 1, b.center().y());
            }
            p.setPen(QPen(kConnector(), 2.0));
            p.drawLine(from, to);
            drawArrowHead(to, from);
        } else {
            const bool turnRight = a.center().x() > rect().center().x();
            const QPointF aEdge = turnRight
                ? QPointF(a.right(), a.center().y())
                : QPointF(a.left(),  a.center().y());
            const QPointF bEdge = turnRight
                ? QPointF(b.right(), b.center().y())
                : QPointF(b.left(),  b.center().y());
            const qreal turnX = turnRight ? aEdge.x() + kTurnOffset
                                          : aEdge.x() - kTurnOffset;
            p.setPen(QPen(kConnector(), 2.0));