cabana: display signal details in tooltip (#28471)

* show details in tooltip

* display tooltip in signalView

* cleanup

* setHeader before sortByColumn

* more compact tooltip

* move to util
old-commit-hash: 9632451d1d6a726d389a91bd47261c0acda1a6ae

tools/cabana/binaryview.cc

@@ -127,15 +127,6 @@ void BinaryView::highlight(const cabana::Signal *sig) {
       }
     }
 
-    if (sig && underMouse()) {
-      QString tooltip = tr(R"(%1<br /><span style="color:gray;font-size:small">
-        Size:%2 LE:%3 SGD:%4</span>
-      )").arg(sig->name).arg(sig->size).arg(sig->is_little_endian ? "Y" : "N").arg(sig->is_signed ? "Y" : "N");
-      QToolTip::showText(QCursor::pos(), tooltip, this, rect());
-    } else {
-      QToolTip::showText(QCursor::pos(), "", this, rect());
-    }
-
     hovered_sig = sig;
     emit signalHovered(hovered_sig);
   }
@@ -349,6 +340,16 @@ QVariant BinaryViewModel::headerData(int section, Qt::Orientation orientation, i
   return {};
 }
 
+QVariant BinaryViewModel::data(const QModelIndex &index, int role) const {
+  if (role == Qt::ToolTipRole) {
+    auto item = (const BinaryViewModel::Item *)index.internalPointer();
+    if (item && !item->sigs.empty()) {
+      return signalToolTip(item->sigs.back());
+    }
+  }
+  return {};
+}
+
 // BinaryItemDelegate
 
 BinaryItemDelegate::BinaryItemDelegate(QObject *parent) : QStyledItemDelegate(parent) {

tools/cabana/binaryview.h

@@ -28,7 +28,7 @@ public:
   void updateState();
   void updateItem(int row, int col, const QString &val, const QColor &color);
   QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
-  QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const { return {}; }
+  QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
   int rowCount(const QModelIndex &parent = QModelIndex()) const override { return row_count; }
   int columnCount(const QModelIndex &parent = QModelIndex()) const override { return column_count; }
   inline QModelIndex bitIndex(int bit, bool is_lb) const { return index(bit / 8, is_lb ? (7 - bit % 8) : bit % 8); }

tools/cabana/messageswidget.cc

@@ -33,6 +33,7 @@ MessagesWidget::MessagesWidget(QWidget *parent) : QWidget(parent) {
 
   view->setItemDelegate(delegate);
   view->setModel(model);
+  view->setHeader(header);
   view->setSortingEnabled(true);
   view->sortByColumn(MessageListModel::Column::NAME, Qt::AscendingOrder);
   view->setAllColumnsShowFocus(true);
@@ -40,7 +41,6 @@ MessagesWidget::MessagesWidget(QWidget *parent) : QWidget(parent) {
   view->setItemsExpandable(false);
   view->setIndentation(0);
   view->setRootIsDecorated(false);
-  view->setHeader(header);
 
   // Must be called before setting any header parameters to avoid overriding
   restoreHeaderState(settings.message_header_state);

tools/cabana/signalview.cc

@@ -146,7 +146,7 @@ QVariant SignalModel::data(const QModelIndex &index, int role) const {
     } else if (role == Qt::DecorationRole && index.column() == 0 && item->type == Item::ExtraInfo) {
       return utils::icon(item->parent->extra_expanded ? "chevron-compact-down" : "chevron-compact-up");
     } else if (role == Qt::ToolTipRole && item->type == Item::Sig) {
-      return (index.column() == 0) ? item->sig->name : item->sig_val;
+      return (index.column() == 0) ? signalToolTip(item->sig) : QString();
     }
   }
   return {};
@@ -300,20 +300,6 @@ QSize SignalItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QMo
   return {width, QApplication::fontMetrics().height()};
 }
 
-bool SignalItemDelegate::helpEvent(QHelpEvent *event, QAbstractItemView *view, const QStyleOptionViewItem &option, const QModelIndex &index) {
-  if (event && event->type() == QEvent::ToolTip && index.isValid()) {
-    auto item = (SignalModel::Item *)index.internalPointer();
-    if (item->type == SignalModel::Item::Sig && index.column() == 1) {
-      QRect rc = option.rect.adjusted(0, 0, -option.rect.width() * 0.4, 0);
-      if (rc.contains(event->pos())) {
-        event->setAccepted(false);
-        return false;
-      }
-    }
-  }
-  return QStyledItemDelegate::helpEvent(event, view, option, index);
-}
-
 void SignalItemDelegate::updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const {
   auto item = (SignalModel::Item *)index.internalPointer();
   if (editor && item->type == SignalModel::Item::Sig && index.column() == 1) {

tools/cabana/signalview.h

@@ -85,7 +85,6 @@ public:
   void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
   QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;
   QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
-  bool helpEvent(QHelpEvent *event, QAbstractItemView *view, const QStyleOptionViewItem &option, const QModelIndex &index) override;
   void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
 
   QValidator *name_validator, *double_validator;

tools/cabana/util.cc

@@ -230,3 +230,13 @@ int num_decimals(double num) {
   auto dot_pos = string.indexOf('.');
   return dot_pos == -1 ? 0 : string.size() - dot_pos - 1;
 }
+
+QString signalToolTip(const cabana::Signal *sig) {
+  return QObject::tr(R"(
+    %1<br /><span font-size:small">
+    Start Bit: %2 Size: %3<br />
+    MSB: %4 LSB: %5<br />
+    Little Endian: %6 Signed: %7</span>
+  )").arg(sig->name).arg(sig->start_bit).arg(sig->size).arg(sig->msb).arg(sig->lsb)
+     .arg(sig->is_little_endian ? "Y" : "N").arg(sig->is_signed ? "Y" : "N");
+}

tools/cabana/util.h

@@ -136,3 +136,4 @@ private:
 };
 
 int num_decimals(double num);
+QString signalToolTip(const cabana::Signal *sig);