From 2de2bab2864eeaea8104ac0cbb619c5c25b8b4d6 Mon Sep 17 00:00:00 2001
From: Dean Lee <deanlee3@gmail.com>
Date: Thu, 26 Jan 2023 02:59:05 +0800
Subject: [PATCH] cabana: fix divde by zero for std::log10 (#27077)

fix divde by zero for std::log10
---
 tools/cabana/chartswidget.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/cabana/chartswidget.cc b/tools/cabana/chartswidget.cc
index 2965ae047..5d0e5d7a5 100644
--- a/tools/cabana/chartswidget.cc
+++ b/tools/cabana/chartswidget.cc
@@ -332,6 +332,9 @@ ChartView::ChartView(QWidget *parent) : QChartView(nullptr, parent) {
 }
 
 qreal ChartView::getYAsixLabelWidth() const {
+  if (axis_y->max() <= axis_y->min() || axis_y->tickCount() <= 1) {
+    return 0;
+  }
   QFontMetrics fm(axis_y->labelsFont());
   int n = qMax(int(-qFloor(std::log10((axis_y->max() - axis_y->min()) / (axis_y->tickCount() - 1)))), 0) + 1;
   return qMax(fm.width(QString::number(axis_y->min(), 'f', n)), fm.width(QString::number(axis_y->max(), 'f', n))) + 20;