cabana: fix chart value tip flickers when the mouse moves over it (#32796)

fix chart value tip flickers

tools/cabana/chart/chart.cc

@@ -421,13 +421,6 @@ qreal ChartView::niceNumber(qreal x, bool ceiling) {
   return q * z;
 }
 
-void ChartView::leaveEvent(QEvent *event) {
-  if (tip_label->isVisible()) {
-    charts_widget->showValueTip(-1);
-  }
-  QChartView::leaveEvent(event);
-}
-
 QPixmap getBlankShadowPixmap(const QPixmap &px, int radius) {
   QGraphicsDropShadowEffect *e = new QGraphicsDropShadowEffect;
   e->setColor(QColor(40, 40, 40, 245));
@@ -546,7 +539,7 @@ void ChartView::mouseMoveEvent(QMouseEvent *ev) {
   bool is_zooming = rubber && rubber->isVisible();
   clearTrackPoints();
 
-  if (!is_zooming && plot_area.contains(ev->pos())) {
+  if (!is_zooming && plot_area.contains(ev->pos()) && isActiveWindow()) {
     const double sec = chart()->mapToValue(ev->pos()).x();
     charts_widget->showValueTip(sec);
   } else if (tip_label->isVisible()) {

tools/cabana/chart/chart.h

@@ -76,7 +76,6 @@ private:
   void dragLeaveEvent(QDragLeaveEvent *event) override { drawDropIndicator(false); }
   void dragMoveEvent(QDragMoveEvent *event) override;
   void dropEvent(QDropEvent *event) override;
-  void leaveEvent(QEvent *event) override;
   void resizeEvent(QResizeEvent *event) override;
   QSize sizeHint() const override;
   void updateAxisY();

tools/cabana/chart/chartswidget.cc

@@ -116,13 +116,12 @@ ChartsWidget::ChartsWidget(QWidget *parent) : QFrame(parent) {
   QObject::connect(tabbar, &QTabBar::currentChanged, [this](int index) {
     if (index != -1) updateLayout(true);
   });
-  QObject::connect(dock_btn, &QToolButton::clicked, [this]() {
-    emit dock(!docking);
-    docking = !docking;
-    updateToolBar();
-  });
+  QObject::connect(dock_btn, &QToolButton::clicked, this, &ChartsWidget::toggleChartsDocking);
 
+  setIsDocked(true);
   newTab();
+  qApp->installEventFilter(this);
+
   setWhatsThis(tr(R"(
     <b>Chart view</b><br />
     <!-- TODO: add descprition here -->
@@ -177,8 +176,11 @@ QRect ChartsWidget::chartVisibleRect(ChartView *chart) {
 }
 
 void ChartsWidget::showValueTip(double sec) {
+  if (sec < 0 && !value_tip_visible_) return;
+
+  value_tip_visible_ = sec >= 0;
   for (auto c : currentCharts()) {
-    sec >= 0 ? c->showTip(sec) : c->hideTip();
+    value_tip_visible_ ? c->showTip(sec) : c->hideTip();
   }
 }
 
@@ -209,6 +211,12 @@ void ChartsWidget::setMaxChartRange(int value) {
   updateState();
 }
 
+void ChartsWidget::setIsDocked(bool docked) {
+  is_docked = docked;
+  dock_btn->setIcon(is_docked ? "arrow-up-right-square" : "arrow-down-left-square");
+  dock_btn->setToolTip(is_docked ? tr("Float the charts window") : tr("Dock the charts window"));
+}
+
 void ChartsWidget::updateToolBar() {
   title_label->setText(tr("Charts: %1").arg(charts.size()));
   columns_action->setText(tr("Column: %1").arg(column_count));
@@ -222,8 +230,6 @@ void ChartsWidget::updateToolBar() {
   reset_zoom_action->setVisible(is_zoomed);
   reset_zoom_btn->setText(is_zoomed ? tr("%1-%2").arg(can->timeRange()->first, 0, 'f', 2).arg(can->timeRange()->second, 0, 'f', 2) : "");
   remove_all_btn->setEnabled(!charts.isEmpty());
-  dock_btn->setIcon(docking ? "arrow-up-right-square" : "arrow-down-left-square");
-  dock_btn->setToolTip(docking ? tr("Undock charts") : tr("Dock charts"));
 }
 
 void ChartsWidget::settingChanged() {
@@ -375,11 +381,6 @@ QSize ChartsWidget::minimumSizeHint() const {
   return QSize(CHART_MIN_WIDTH, QWidget::minimumSizeHint().height());
 }
 
-void ChartsWidget::resizeEvent(QResizeEvent *event) {
-  QWidget::resizeEvent(event);
-  updateLayout();
-}
-
 void ChartsWidget::newChart() {
   SignalSelector dlg(tr("New Chart"), this);
   if (dlg.exec() == QDialog::Accepted) {
@@ -432,10 +433,16 @@ void ChartsWidget::alignCharts() {
   }
 }
 
-bool ChartsWidget::eventFilter(QObject *obj, QEvent *event) {
-  if (obj != this && event->type() == QEvent::Close) {
-    emit dock_btn->clicked();
-    return true;
+bool ChartsWidget::eventFilter(QObject *o, QEvent *e) {
+  if (value_tip_visible_ && e->type() == QEvent::MouseMove) {
+    auto pos = static_cast<QMouseEvent *>(e)->globalPos();
+    bool outside_plot_area =std::none_of(charts.begin(), charts.end(), [&pos](auto c) {
+      return c->chart()->plotArea().contains(c->mapFromGlobal(pos));
+    });
+
+    if (outside_plot_area) {
+      showValueTip(-1);
+    }
   }
   return false;
 }
@@ -443,30 +450,25 @@ bool ChartsWidget::eventFilter(QObject *obj, QEvent *event) {
 bool ChartsWidget::event(QEvent *event) {
   bool back_button = false;
   switch (event->type()) {
-    case QEvent::MouseButtonPress: {
-      QMouseEvent *ev = static_cast<QMouseEvent *>(event);
-      back_button = ev->button() == Qt::BackButton;
+    case QEvent::Resize:
+      updateLayout();
       break;
-    }
-    case QEvent::NativeGesture: {
-      QNativeGestureEvent *ev = static_cast<QNativeGestureEvent *>(event);
-      back_button = (ev->value() == 180);
+    case QEvent::MouseButtonPress:
+      back_button = static_cast<QMouseEvent *>(event)->button() == Qt::BackButton;
+      break;
+    case QEvent::NativeGesture:
+      back_button = (static_cast<QNativeGestureEvent *>(event)->value() == 180);
       break;
-    }
-    case QEvent::WindowActivate:
     case QEvent::WindowDeactivate:
-    case QEvent::FocusIn:
     case QEvent::FocusOut:
-    case QEvent::Leave:
       showValueTip(-1);
-      break;
     default:
       break;
   }
 
   if (back_button) {
     zoom_undo_stack->undo();
-    return true;
+    return true;  // Return true since the event has been handled
   }
   return QFrame::event(event);
 }

tools/cabana/chart/chartswidget.h

@@ -47,14 +47,14 @@ public slots:
   void setColumnCount(int n);
   void removeAll();
   void timeRangeChanged(const std::optional<std::pair<double, double>> &time_range);
+  void setIsDocked(bool dock);
 
 signals:
-  void dock(bool floating);
+  void toggleChartsDocking();
   void seriesChanged();
 
 private:
   QSize minimumSizeHint() const override;
-  void resizeEvent(QResizeEvent *event) override;
   bool event(QEvent *event) override;
   void alignCharts();
   void newChart();
@@ -85,7 +85,7 @@ private:
   LogSlider *range_slider;
   QAction *range_lb_action;
   QAction *range_slider_action;
-  bool docking = true;
+  bool is_docked = true;
   ToolButton *dock_btn;
 
   QAction *undo_zoom_action;
@@ -109,6 +109,7 @@ private:
   QTimer *auto_scroll_timer;
   QTimer *align_timer;
   int current_theme = 0;
+  bool value_tip_visible_ = false;
   friend class ZoomCommand;
   friend class ChartView;
   friend class ChartsContainer;

tools/cabana/chart/tiplabel.cc

@@ -9,8 +9,12 @@
 #include "tools/cabana/settings.h"
 
 TipLabel::TipLabel(QWidget *parent) : QLabel(parent, Qt::ToolTip | Qt::FramelessWindowHint) {
+  setAttribute(Qt::WA_ShowWithoutActivating);
+  setAttribute(Qt::WA_TransparentForMouseEvents);
+
   setForegroundRole(QPalette::ToolTipText);
   setBackgroundRole(QPalette::ToolTipBase);
+
   QFont font;
   font.setPointSizeF(8.34563465);
   setFont(font);
@@ -22,9 +26,7 @@ TipLabel::TipLabel(QWidget *parent) : QLabel(parent, Qt::ToolTip | Qt::Frameless
   setPalette(palette);
   ensurePolished();
   setMargin(1 + style()->pixelMetric(QStyle::PM_ToolTipLabelFrameWidth, nullptr, this));
-  setAttribute(Qt::WA_ShowWithoutActivating);
   setTextFormat(Qt::RichText);
-  setVisible(false);
 }
 
 void TipLabel::showText(const QPoint &pt, const QString &text, QWidget *w, const QRect &rect) {

tools/cabana/mainwin.cc

@@ -198,7 +198,7 @@ void MainWindow::createDockWidgets() {
   video_splitter->restoreState(settings.video_splitter_state);
   video_splitter->handle(1)->setEnabled(!can->liveStreaming());
   video_dock->setWidget(video_splitter);
-  QObject::connect(charts_widget, &ChartsWidget::dock, this, &MainWindow::dockCharts);
+  QObject::connect(charts_widget, &ChartsWidget::toggleChartsDocking, this, &MainWindow::toggleChartsDocking);
 }
 
 void MainWindow::createStatusBar() {
@@ -577,20 +577,31 @@ void MainWindow::updateStatus() {
   status_label->setText(tr("Cached Minutes:%1 FPS:%2").arg(settings.max_cached_minutes).arg(settings.fps));
 }
 
-void MainWindow::dockCharts(bool dock) {
-  if (dock && floating_window) {
-    floating_window->removeEventFilter(charts_widget);
+bool MainWindow::eventFilter(QObject *obj, QEvent *event) {
+  if (obj == floating_window && event->type() == QEvent::Close) {
+    toggleChartsDocking();
+    return true;
+  }
+  return QMainWindow::eventFilter(obj, event);
+}
+
+void MainWindow::toggleChartsDocking() {
+  if (floating_window) {
+    // Dock the charts widget back to the main window
+    floating_window->removeEventFilter(this);
     charts_layout->insertWidget(0, charts_widget, 1);
     floating_window->deleteLater();
     floating_window = nullptr;
-  } else if (!dock && !floating_window) {
-    floating_window = new QWidget(this);
-    floating_window->setWindowFlags(Qt::Window);
+    charts_widget->setIsDocked(true);
+  } else {
+    // Float the charts widget in a separate window
+    floating_window = new QWidget(this, Qt::Window);
     floating_window->setWindowTitle("Charts");
     floating_window->setLayout(new QVBoxLayout());
     floating_window->layout()->addWidget(charts_widget);
-    floating_window->installEventFilter(charts_widget);
+    floating_window->installEventFilter(this);
     floating_window->showMaximized();
+    charts_widget->setIsDocked(false);
   }
 }
 

tools/cabana/mainwin.h

@@ -21,7 +21,7 @@ class MainWindow : public QMainWindow {
 
 public:
   MainWindow();
-  void dockCharts(bool dock);
+  void toggleChartsDocking();
   void showStatusMessage(const QString &msg, int timeout = 0) { statusBar()->showMessage(msg, timeout); }
   void loadFile(const QString &fn, SourceSet s = SOURCE_ALL);
   ChartsWidget *charts_widget = nullptr;
@@ -46,6 +46,7 @@ signals:
   void updateProgressBar(uint64_t cur, uint64_t total, bool success);
 
 protected:
+  bool eventFilter(QObject *obj, QEvent *event) override;
   void remindSaveChanges();
   void closeFile(SourceSet s = SOURCE_ALL);
   void closeFile(DBCFile *dbc_file);