cabana: display chart count in tab (#27853)

display chart count in tabbar

tools/cabana/chart/chartswidget.cc

@@ -105,6 +105,7 @@ ChartsWidget::ChartsWidget(QWidget *parent) : align_timer(this), auto_scroll_tim
   QObject::connect(reset_zoom_btn, &QToolButton::clicked, this, &ChartsWidget::zoomReset);
   QObject::connect(&settings, &Settings::changed, this, &ChartsWidget::settingChanged);
   QObject::connect(new_tab_btn, &QToolButton::clicked, this, &ChartsWidget::newTab);
+  QObject::connect(this, &ChartsWidget::seriesChanged, this, &ChartsWidget::updateTabBar);
   QObject::connect(tabbar, &QTabBar::tabCloseRequested, this, &ChartsWidget::removeTab);
   QObject::connect(tabbar, &QTabBar::currentChanged, [this](int index) {
     if (index != -1) updateLayout(true);
@@ -126,10 +127,8 @@ void ChartsWidget::newTab() {
   static int tab_unique_id = 0;
   int idx = tabbar->addTab("");
   tabbar->setTabData(idx, tab_unique_id++);
-  for (int i = 0; i < tabbar->count(); ++i) {
-    tabbar->setTabText(i, QString("Tab %1").arg(i + 1));
-  }
   tabbar->setCurrentIndex(idx);
+  updateTabBar();
 }
 
 void ChartsWidget::removeTab(int index) {
@@ -139,6 +138,14 @@ void ChartsWidget::removeTab(int index) {
   }
   tab_charts.erase(id);
   tabbar->removeTab(index);
+  updateTabBar();
+}
+
+void ChartsWidget::updateTabBar() {
+  for (int i = 0; i < tabbar->count(); ++i) {
+    const auto &charts_in_tab = tab_charts[tabbar->tabData(i).toInt()];
+    tabbar->setTabText(i, QString("Tab %1 (%2)").arg(i + 1).arg(charts_in_tab.count()));
+  }
 }
 
 void ChartsWidget::eventsMerged() {
@@ -381,18 +388,19 @@ void ChartsWidget::removeChart(ChartView *chart) {
 }
 
 void ChartsWidget::removeAll() {
+  while (tabbar->count() > 1) {
+    tabbar->removeTab(1);
+  }
+  tab_charts.clear();
+
   if (!charts.isEmpty()) {
     for (auto c : charts) {
       c->deleteLater();
     }
     charts.clear();
-    tab_charts.clear();
     updateToolBar();
     emit seriesChanged();
   }
-  while (tabbar->count() > 1) {
-    tabbar->removeTab(1);
-  }
 }
 
 void ChartsWidget::alignCharts() {
@@ -475,6 +483,7 @@ void ChartsContainer::dropEvent(QDropEvent *event) {
       int to = w ? charts_widget->currentCharts().indexOf(w) + 1 : 0;
       charts_widget->currentCharts().insert(to, chart);
       charts_widget->updateLayout(true);
+      charts_widget->updateTabBar();
       event->acceptProposedAction();
       chart->startAnimation();
     }

tools/cabana/chart/chartswidget.h

@@ -67,6 +67,7 @@ private:
   void stopAutoScroll();
   void doAutoScroll();
   void updateToolBar();
+  void updateTabBar();
   void setMaxChartRange(int value);
   void updateLayout(bool force = false);
   void settingChanged();