cabana: some improvements to messages view (#27935)

* improve messageswidget

* remove double semicolon

tools/cabana/messageswidget.cc

@@ -132,12 +132,20 @@ QVariant MessageListModel::data(const QModelIndex &index, int role) const {
   const auto &id = msgs[index.row()];
   auto &can_data = can->lastMessage(id);
 
+  auto getFreq = [](const CanData &d) -> QString {
+    if (d.freq > 0 && (can->currentSec() - d.ts) < (5.0 / d.freq)) {
+      return d.freq >= 1 ? QString::number(std::nearbyint(d.freq)) : QString::number(d.freq, 'f', 2);
+    } else {
+      return "--";
+    }
+  };
+
   if (role == Qt::DisplayRole) {
     switch (index.column()) {
       case 0: return msgName(id);
       case 1: return id.source;
-      case 2: return QString::number(id.address, 16);;
-      case 3: return can_data.freq;
+      case 2: return QString::number(id.address, 16);
+      case 3: return getFreq(can_data);
       case 4: return can_data.count;
       case 5: return toHex(can_data.dat);
     }

tools/cabana/streams/abstractstream.h

@@ -17,7 +17,7 @@ struct CanData {
 
   double ts = 0.;
   uint32_t count = 0;
-  uint32_t freq = 0;
+  double freq = 0;
   QByteArray dat;
   QVector<QColor> colors;
   QVector<double> last_change_t;

tools/cabana/util.cc

@@ -3,6 +3,7 @@
 #include <QFontDatabase>
 #include <QPainter>
 #include <QPixmapCache>
+#include <QToolTip>
 
 #include "selfdrive/ui/qt/util.h"
 
@@ -76,6 +77,17 @@ QSize MessageBytesDelegate::sizeHint(const QStyleOptionViewItem &option, const Q
   return size;
 }
 
+bool MessageBytesDelegate::helpEvent(QHelpEvent *e, QAbstractItemView *view, const QStyleOptionViewItem &option, const QModelIndex &index) {
+  if (e->type() == QEvent::ToolTip && index.column() == 0) {
+    if (view->visualRect(index).width() < QStyledItemDelegate::sizeHint(option, index).width()) {
+      QToolTip::showText(e->globalPos(), index.data(Qt::DisplayRole).toString(), view);
+      return true;
+    }
+  }
+  QToolTip::hideText();
+  return false;
+}
+
 void MessageBytesDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const {
   auto data = index.data(BytesRole);
   if (!data.isValid()) {
@@ -89,24 +101,29 @@ void MessageBytesDelegate::paint(QPainter *painter, const QStyleOptionViewItem &
   int h_margin = option.widget->style()->pixelMetric(QStyle::PM_FocusFrameHMargin);
   if (option.state & QStyle::State_Selected) {
     painter->fillRect(option.rect, option.palette.highlight());
-    painter->setPen(option.palette.color(QPalette::HighlightedText));
-  } else {
-    painter->setPen(option.palette.color(QPalette::Text));
   }
 
   const QPoint pt{option.rect.left() + h_margin, option.rect.top() + v_margin};
   QFont old_font = painter->font();
+  QPen old_pen = painter->pen();
   painter->setFont(fixed_font);
   for (int i = 0; i < byte_list.size(); ++i) {
     int row = !multiple_lines ? 0 : i / 8;
     int column = !multiple_lines ? i : i % 8;
     QRect r = QRect({pt.x() + column * byte_size.width(), pt.y() + row * byte_size.height()}, byte_size);
     if (i < colors.size() && colors[i].alpha() > 0) {
+      if (option.state & QStyle::State_Selected) {
+        painter->setPen(option.palette.color(QPalette::Text));
+        painter->fillRect(r, option.palette.color(QPalette::Window));
+      }
       painter->fillRect(r, colors[i]);
+    } else if (option.state & QStyle::State_Selected) {
+      painter->setPen(option.palette.color(QPalette::HighlightedText));
     }
     painter->drawText(r, Qt::AlignCenter, toHex(byte_list[i]));
   }
   painter->setFont(old_font);
+  painter->setPen(old_pen);
 }
 
 QColor getColor(const cabana::Signal *sig) {

tools/cabana/util.h

@@ -2,6 +2,7 @@
 
 #include <cmath>
 
+#include <QAbstractItemView>
 #include <QApplication>
 #include <QByteArray>
 #include <QDateTime>
@@ -66,6 +67,7 @@ public:
   MessageBytesDelegate(QObject *parent, bool multiple_lines = false);
   void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
   QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override;
+  bool helpEvent(QHelpEvent *event, QAbstractItemView *view, const QStyleOptionViewItem &option, const QModelIndex &index) override;
   void setMultipleLines(bool v);
 
 private: