From e4f00c52dae72468fc599affdacfc2a9d2dde53e Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Mon, 13 May 2019 20:29:18 +0200
Subject: [PATCH] Fix #194 Graph window loops to end if you scroll left past 0

---
 client/proxguiqt.cpp | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/client/proxguiqt.cpp b/client/proxguiqt.cpp
index e2ef546f6..8357c785f 100644
--- a/client/proxguiqt.cpp
+++ b/client/proxguiqt.cpp
@@ -586,7 +586,7 @@ void Plot::mouseMoveEvent(QMouseEvent *event) {
 }
 
 void Plot::keyPressEvent(QKeyEvent *event) {
-    int offset;
+    uint32_t offset;
 
     if (event->modifiers() & Qt::ShiftModifier) {
         if (PlotGridX)
@@ -623,9 +623,15 @@ void Plot::keyPressEvent(QKeyEvent *event) {
 
         case Qt::Key_Left:
             if (GraphPixelsPerPoint < 20) {
-                GraphStart -= offset;
+                if (GraphStart >= offset) {
+                    GraphStart -= offset;
+                } else {
+                    GraphStart = 0;
+                }
             } else {
-                GraphStart--;
+                if (GraphStart > 0) {
+                    GraphStart--;
+                }
             }
             break;