From 3d2169b83376f84533277bb0d03f9f1212d613bf Mon Sep 17 00:00:00 2001
From: Jacob Litewski <jacob.litewski@gmail.com>
Date: Wed, 10 Apr 2024 19:09:37 -0400
Subject: [PATCH] Cursor A graph scrolling implementation

If Cursor A goes off the screen, it will reposition the window to place the cursor in the middle of it.
---
 client/src/proxguiqt.cpp | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/client/src/proxguiqt.cpp b/client/src/proxguiqt.cpp
index 23ba3f332..760257bcd 100644
--- a/client/src/proxguiqt.cpp
+++ b/client/src/proxguiqt.cpp
@@ -1260,33 +1260,55 @@ void Plot::keyPressEvent(QKeyEvent *event) {
             RepaintGraphWindow();
             break;
 
-        case Qt::Key_BracketLeft:
+        case Qt::Key_BracketLeft: {
             if(event->modifiers() & Qt::ControlModifier) {
                 CursorAPos -= 5;
             } else {
                 CursorAPos -= 1;
             }
 
+            if((CursorAPos >= g_GraphStop) || (CursorAPos <= g_GraphStart)) {
+                uint32_t halfway = PageWidth / 2;
+
+                if((CursorAPos - halfway) > g_GraphTraceLen) {
+                    g_GraphStart = 0;
+                }  else {
+                    g_GraphStart = CursorAPos - halfway;
+                }
+            }
+
             if(CursorAPos < g_GraphStart) {
                 CursorAPos = g_GraphStart;
             }
 
             RepaintGraphWindow();
             break;
+        }
         
-        case Qt::Key_BracketRight:
+        case Qt::Key_BracketRight: {
             if(event->modifiers() & Qt::ControlModifier) {
                 CursorAPos += 5;
             } else {
                 CursorAPos += 1;
             }
 
+            if((CursorAPos >= g_GraphStop) || (CursorAPos <= g_GraphStart)) {
+                uint32_t halfway = PageWidth / 2;
+
+                if((CursorAPos + halfway) >= g_GraphTraceLen) {
+                    g_GraphStart = g_GraphTraceLen - halfway;
+                } else {
+                    g_GraphStart = CursorAPos - halfway;
+                }
+            }
+
             if(CursorAPos >= g_GraphTraceLen) {
                 CursorAPos = g_GraphTraceLen;
             }
 
             RepaintGraphWindow();
             break;
+        }
         
         case Qt::Key_BraceLeft:
             if(event->modifiers() & Qt::ControlModifier) {