- Auto-scroll standard aktiv

- Tag-Filter wird gespeichert
- Tag Monitor kann bei einem Tag jetzt pro Key mehrere Werte in einer Tabelle anzeigen
- Bug für Clear behoben

src/videowidget.cpp

@@ -8,7 +8,6 @@
 #include <QMetaObject>
 #include <QResizeEvent>
 
-// Enumerate /dev/video* entries
 static QStringList enumerateVideoDevices()
 {
     QStringList devices;
@@ -19,8 +18,6 @@ static QStringList enumerateVideoDevices()
     return devices;
 }
 
-// ── ctor / dtor ───────────────────────────────────────────────────────────────
-
 VideoWidget::VideoWidget(QWidget *parent)
     : QWidget(parent)
 {
@@ -32,20 +29,20 @@ VideoWidget::VideoWidget(QWidget *parent)
 
     connect(m_thread, &QThread::finished, m_worker, &QObject::deleteLater);
 
-    connect(m_worker, &V4l2Worker::newFrame,        this, &VideoWidget::onNewFrame,
+    connect(m_worker, &V4l2Worker::newFrame,       this, &VideoWidget::onNewFrame,
             Qt::QueuedConnection);
-    connect(m_worker, &V4l2Worker::captureStarted,  this, [this](const QString &dev, int w, int h, const QString &fmt) {
+    connect(m_worker, &V4l2Worker::captureStarted, this, [this](const QString &dev, int w, int h, const QString &fmt) {
         m_infoLabel->setText(tr("%1  %2×%3  %4").arg(dev).arg(w).arg(h).arg(fmt));
         m_running = true;
         m_startBtn->setText(tr("■ Stop"));
     });
-    connect(m_worker, &V4l2Worker::captureStopped,  this, [this] {
+    connect(m_worker, &V4l2Worker::captureStopped, this, [this] {
         m_running = false;
         m_startBtn->setText(tr("▶ Start"));
         m_infoLabel->setText(tr("Stopped"));
         update();
     });
-    connect(m_worker, &V4l2Worker::errorOccurred,   this, [this](const QString &msg) {
+    connect(m_worker, &V4l2Worker::errorOccurred,  this, [this](const QString &msg) {
         m_infoLabel->setText(tr("Error: %1").arg(msg));
         m_running = false;
         m_startBtn->setText(tr("▶ Start"));
@@ -60,8 +57,6 @@ void VideoWidget::shutdown()
         return;
     m_shutdownDone = true;
 
-    // stopCapture() sets m_running=false and joins the std::thread internally.
-    // Must happen before we quit the Qt event thread.
     m_worker->stopCapture();
 
     if (m_thread && m_thread->isRunning()) {
@@ -77,8 +72,6 @@ VideoWidget::~VideoWidget()
     shutdown();
 }
 
-// ── UI setup ─────────────────────────────────────────────────────────────────
-
 void VideoWidget::setupUi()
 {
     setMinimumHeight(140);
@@ -87,7 +80,6 @@ void VideoWidget::setupUi()
     layout->setContentsMargins(2, 2, 2, 2);
     layout->setSpacing(3);
 
-    // ── Controls row ──────────────────────────────────────────────────────────
     auto *ctrlRow = new QHBoxLayout();
     ctrlRow->setSpacing(4);
 
@@ -97,7 +89,6 @@ void VideoWidget::setupUi()
 
     auto *refreshBtn = new QPushButton("↻", this);
     refreshBtn->setMaximumWidth(26);
-    refreshBtn->setToolTip(tr("Refresh device list"));
     connect(refreshBtn, &QPushButton::clicked, this, &VideoWidget::refreshDeviceList);
 
     m_startBtn = new QPushButton(tr("▶ Start"), this);
@@ -111,7 +102,6 @@ void VideoWidget::setupUi()
 
     m_screenshotBtn = new QPushButton(tr("📷"), this);
     m_screenshotBtn->setMaximumWidth(32);
-    m_screenshotBtn->setToolTip(tr("Save screenshot (PNG/JPG)"));
     connect(m_screenshotBtn, &QPushButton::clicked, this, &VideoWidget::onScreenshot);
 
     ctrlRow->addWidget(m_deviceCombo, 1);
@@ -121,24 +111,17 @@ void VideoWidget::setupUi()
     ctrlRow->addWidget(m_screenshotBtn);
     layout->addLayout(ctrlRow);
 
-    // ── Info label ────────────────────────────────────────────────────────────
     m_infoLabel = new QLabel(tr("No device started"), this);
     m_infoLabel->setStyleSheet("color: gray; font-size: 9px;");
     layout->addWidget(m_infoLabel);
 
-    // The video frame is drawn directly in paintEvent – no QLabel needed.
-    // We leave stretch space for it.
     layout->addStretch(1);
 }
 
-// ── Slots ─────────────────────────────────────────────────────────────────────
-
 void VideoWidget::onStartStop()
 {
-    if (m_running)
-        stopCapture();
-    else
-        startCapture();
+    if (m_running) stopCapture();
+    else           startCapture();
 }
 
 void VideoWidget::onFreeze(bool frozen)
@@ -172,7 +155,14 @@ void VideoWidget::onNewFrame(const QImage &frame)
         return;
     m_frame = frame;
     updateScaled();
-    update();   // trigger paintEvent
+    update();
+}
+
+void VideoWidget::clearFrame()
+{
+    m_frame  = QImage();
+    m_scaled = QImage();
+    update();
 }
 
 void VideoWidget::refreshDeviceList()
@@ -182,14 +172,11 @@ void VideoWidget::refreshDeviceList()
     const auto devices = enumerateVideoDevices();
     for (const auto &d : devices)
         m_deviceCombo->addItem(d);
-    // Restore previous selection if still present
     const int idx = m_deviceCombo->findText(current);
     if (idx >= 0)
         m_deviceCombo->setCurrentIndex(idx);
 }
 
-// ── Capture start/stop ────────────────────────────────────────────────────────
-
 void VideoWidget::startCapture()
 {
     const QString dev = m_deviceCombo->currentText();
@@ -197,7 +184,6 @@ void VideoWidget::startCapture()
         return;
     m_frame = QImage();
     m_scaled = QImage();
-    // startCapture blocks in the worker thread until stopCapture() is called
     QMetaObject::invokeMethod(m_worker, "startCapture",
         Qt::QueuedConnection,
         Q_ARG(QString, dev),
@@ -210,11 +196,8 @@ void VideoWidget::stopCapture()
     QMetaObject::invokeMethod(m_worker, "stopCapture", Qt::QueuedConnection);
 }
 
-// ── Paint ─────────────────────────────────────────────────────────────────────
-
 void VideoWidget::updateScaled()
 {
-    // Video area = widget height minus the two control rows (~55 px)
     const QRect videoRect(0, 55, width(), height() - 55);
     if (videoRect.width() < 10 || videoRect.height() < 10 || m_frame.isNull())
         return;
@@ -226,8 +209,6 @@ void VideoWidget::updateScaled()
 void VideoWidget::paintEvent(QPaintEvent *)
 {
     QPainter p(this);
-
-    // Background
     p.fillRect(rect(), QColor(0x10, 0x10, 0x10));
 
     if (m_scaled.isNull()) {
@@ -237,14 +218,12 @@ void VideoWidget::paintEvent(QPaintEvent *)
         return;
     }
 
-    // Centre the scaled frame in the video area
     const QRect videoRect(0, 55, width(), height() - 55);
     const QPoint origin(
         videoRect.left() + (videoRect.width()  - m_scaled.width())  / 2,
         videoRect.top()  + (videoRect.height() - m_scaled.height()) / 2);
     p.drawImage(origin, m_scaled);
 
-    // Frozen overlay
     if (m_frozen) {
         p.setPen(QColor(0xff, 0xcc, 0x00));
         p.setFont(QFont("Sans", 9, QFont::Bold));