From 085aa819dc1b43e2ca9f350a83d700ff7ff429ce Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Sun, 1 Aug 2021 22:26:16 +0200
Subject: [PATCH] Prevent GraphStart change on empty plot

---
 client/src/proxguiqt.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/client/src/proxguiqt.cpp b/client/src/proxguiqt.cpp
index 241d3c419..4fbfce09d 100644
--- a/client/src/proxguiqt.cpp
+++ b/client/src/proxguiqt.cpp
@@ -816,6 +816,7 @@ void Plot::Zoom(double factor, uint32_t refX) {
 }
 
 void Plot::Move(int offset) {
+    if (GraphTraceLen == 0) return;
     if (offset > 0) { // Move right
         if (GraphPixelsPerPoint < 20) {
             GraphStart += offset;