Panel circle for visual feedback

2026-04-01 22:08:46 +01:00
parent d75c80ef03
commit 81e8cf74c4
6 changed files with 305 additions and 285 deletions
--- a/PanelsPanel.cpp
+++ b/PanelsPanel.cpp
@@ -0,0 +1,106 @@
+#include "PanelsPanel.h"
+
+#include <QLabel>
+#include <QPainter>
+#include <QPainterPath>
+#include <QVBoxLayout>
+#include <QtMath>
+
+PanelsPanel::PanelsPanel(QWidget *parent) : QWidget(parent)
+{
+    auto *layout = new QVBoxLayout(this);
+    layout->setContentsMargins(4, 4, 4, 4);
+
+    m_statusLabel = new QLabel("Connect to load panels...", this);
+    m_statusLabel->setAlignment(Qt::AlignHCenter | Qt::AlignTop);
+    m_statusLabel->setStyleSheet("color: #888; font-style: italic;");
+    layout->addWidget(m_statusLabel);
+    layout->addStretch(1);
+
+    setMinimumSize(200, 200);
+}
+
+void PanelsPanel::setRnpCount(int count)
+{
+    m_count = count;
+    m_colors.clear();
+    m_statusLabel->setText(count > 0
+        ? QString("%1 panel%2").arg(count).arg(count == 1 ? "" : "s")
+        : "No panels reported");
+    update();
+}
+
+void PanelsPanel::setPanelColor(int index, const QColor &color)
+{
+    m_colors[index] = color;
+    update();
+}
+
+void PanelsPanel::reset()
+{
+    m_count = 0;
+    m_colors.clear();
+    m_statusLabel->setText("Connect to load panels...");
+    update();
+}
+
+void PanelsPanel::paintEvent(QPaintEvent *)
+{
+    if (m_count <= 0) return;
+
+    QPainter p(this);
+    p.setRenderHint(QPainter::Antialiasing, true);
+
+    const QRectF bounds   = rect();
+    const QRectF drawArea = bounds.adjusted(0, 28, 0, 0);
+    const double side     = qMin(drawArea.width(), drawArea.height()) * 0.88;
+    const double cx       = drawArea.center().x();
+    const double cy       = drawArea.center().y();
+    const double outerR   = side / 2.0;
+    const double innerR   = outerR * 0.44;
+
+    const QRectF outerRect(cx - outerR, cy - outerR, side,        side);
+    const QRectF innerRect(cx - innerR, cy - innerR, innerR * 2,  innerR * 2);
+
+    const double gapDeg  = (m_count > 1) ? 3.0 : 0.0;
+    const double segSpan = (360.0 - m_count * gapDeg) / m_count;
+
+    static const QColor kDefault(100, 140, 180);
+
+    for (int i = 0; i < m_count; ++i) {
+        const double startAngle = 90.0 - i * (segSpan + gapDeg);
+        const double sweep      = -segSpan;
+
+        QPainterPath path;
+        path.arcMoveTo(outerRect, startAngle);
+        path.arcTo(outerRect, startAngle, sweep);
+        path.arcTo(innerRect, startAngle + sweep, -sweep);
+        path.closeSubpath();
+
+        p.setBrush(m_colors.value(i, kDefault));
+        p.setPen(QPen(Qt::white, 2));
+        p.drawPath(path);
+
+        // Label at segment midpoint
+        const double midAngle    = startAngle + sweep / 2.0;
+        const double midAngleRad = qDegreesToRadians(midAngle);
+        const double midR        = (outerR + innerR) / 2.0;
+        const QPointF tc(cx + midR * qCos(midAngleRad),
+                         cy - midR * qSin(midAngleRad));
+
+        QFont font = p.font();
+        font.setBold(true);
+        font.setPointSize(qMax(7, qMin(12, static_cast<int>(outerR / (m_count * 0.55 + 2)))));
+        p.setFont(font);
+        p.setPen(Qt::white);
+        p.drawText(QRectF(tc.x() - 22, tc.y() - 11, 44, 22), Qt::AlignCenter, QString::number(i));
+    }
+
+    // Centre hole: total count
+    QFont cf = p.font();
+    cf.setBold(true);
+    cf.setPointSize(qMax(8, static_cast<int>(innerR * 0.45)));
+    p.setFont(cf);
+    p.setPen(palette().text().color());
+    p.drawText(innerRect, Qt::AlignCenter, QString::number(m_count));
+}