From ce3e9d5649d930ea0daae2d2a1587cc6e69c158b Mon Sep 17 00:00:00 2001
From: Dean Lee <deanlee3@gmail.com>
Date: Tue, 28 Feb 2023 07:51:23 +0800
Subject: [PATCH] cabana: fix gaps in step line between chunks (#27447)

---
 tools/cabana/chartswidget.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/cabana/chartswidget.cc b/tools/cabana/chartswidget.cc
index 7982a5899c..42f8e4e06a 100644
--- a/tools/cabana/chartswidget.cc
+++ b/tools/cabana/chartswidget.cc
@@ -552,7 +552,12 @@ void ChartView::updateSeries(const Signal *sig, const std::vector<Event *> *even
       });
       for (auto &c : chunks) {
         s.vals.append(c.vals);
-        s.step_vals.append(c.step_vals);
+        if (!c.step_vals.empty()) {
+          if (!s.step_vals.empty()) {
+            s.step_vals.append({c.step_vals.first().x(), s.step_vals.back().y()});
+          }
+          s.step_vals.append(c.step_vals);
+        }
       }
       if (events->size()) {
         s.last_value_mono_time = events->back()->mono_time;