From: Soeren Apel <redacted>
Date: Fri, 15 Nov 2019 22:34:22 +0000 (+0100)
Subject: Fix #1431 by using per-instance member variables
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=0822e33a2eb713815ae2cd5d6fcca0865643bb00;p=pulseview.git

Fix #1431 by using per-instance member variables
---

diff --git a/pv/views/trace/analogsignal.cpp b/pv/views/trace/analogsignal.cpp
index 3430ab3c..6d4b2c67 100644
--- a/pv/views/trace/analogsignal.cpp
+++ b/pv/views/trace/analogsignal.cpp
@@ -842,7 +842,7 @@ void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 	if (segments.empty())
 		return;
 
-	static double prev_min = 0, prev_max = 0;
+	double signal_min_ = 0, signal_max_ = 0;
 	double min = 0, max = 0;
 
 	for (const shared_ptr<pv::data::AnalogSegment>& segment : segments) {
@@ -851,11 +851,11 @@ void AnalogSignal::perform_autoranging(bool keep_divs, bool force_update)
 		max = std::max(max, mm.second);
 	}
 
-	if ((min == prev_min) && (max == prev_max) && !force_update)
+	if ((min == signal_min_) && (max == signal_max_) && !force_update)
 		return;
 
-	prev_min = min;
-	prev_max = max;
+	signal_min_ = min;
+	signal_max_ = max;
 
 	// If we're allowed to alter the div assignment...
 	if (!keep_divs) {
diff --git a/pv/views/trace/analogsignal.hpp b/pv/views/trace/analogsignal.hpp
index fd724492..0c14b66a 100644
--- a/pv/views/trace/analogsignal.hpp
+++ b/pv/views/trace/analogsignal.hpp
@@ -183,6 +183,8 @@ private:
 		*display_type_cb_;
 	QSpinBox *pvdiv_sb_, *nvdiv_sb_, *div_height_sb_;
 
+	double signal_min_, signal_max_;  // Min/max values of this signal's analog data
+
 	float scale_;
 	int scale_index_;