cabana: fix incorrect point size after adding new series to chart or changing series type (#27199)

* update pointers after create series

* cleanup

tools/cabana/chartswidget.cc

@@ -376,6 +376,7 @@ void ChartView::addSeries(const QString &msg_id, const Signal *sig) {
   sigs.push_back({.msg_id = msg_id, .address = address, .source = source, .sig = sig, .series = series});
   updateTitle();
   updateSeries(sig);
+  updateSeriesPoints();
   emit seriesAdded(msg_id, sig);
 }
 
@@ -482,7 +483,13 @@ void ChartView::updatePlot(double cur, double min, double max) {
   if (min != axis_x->min() || max != axis_x->max()) {
     axis_x->setRange(min, max);
     updateAxisY();
+    updateSeriesPoints();
+  }
+
+  scene()->invalidate({}, QGraphicsScene::ForegroundLayer);
+}
 
+void ChartView::updateSeriesPoints() {
   // Show points when zoomed in enough
   for (auto &s : sigs) {
     auto begin = std::lower_bound(s.vals.begin(), s.vals.end(), axis_x->min(), [](auto &p, double x) { return p.x() < x; });
@@ -512,9 +519,6 @@ void ChartView::updatePlot(double cur, double min, double max) {
 #endif
     }
   }
-  }
-
-  scene()->invalidate({}, QGraphicsScene::ForegroundLayer);
 }
 
 void ChartView::updateSeries(const Signal *sig, const std::vector<Event *> *events, bool clear) {
@@ -783,6 +787,7 @@ void ChartView::setSeriesType(QAbstractSeries::SeriesType type) {
       series->replace(s.vals);
       s.series = series;
     }
+    updateSeriesPoints();
     updateTitle();
   }
 }

tools/cabana/chartswidget.h

@@ -73,6 +73,7 @@ private:
   void applyNiceNumbers(qreal min, qreal max);
   qreal niceNumber(qreal x, bool ceiling);
   QXYSeries *createSeries(QAbstractSeries::SeriesType type);
+  void updateSeriesPoints();
 
   QValueAxis *axis_x;
   QValueAxis *axis_y;