From fcf5a469c78c7ea1c92a7b8409e70c723ef02ea3 Mon Sep 17 00:00:00 2001
From: backuppc <backuppc@mail.com>
Date: Thu, 23 Oct 2025 10:08:59 +0900
Subject: [PATCH] fix: Correct mouse-centered wheel zoom functionality
MIME-Version: 1.0
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- Fix ScreenToWorld coordinate transformation bug in wheel event
- Implement proper mouse cursor-centered zoom calculation
- Calculate world coordinates before zoom and maintain them after zoom
- Adjust pan offset to keep mouse cursor pointing at same world position
- Remove matrix-based transformation that was causing coordinate issues

Fixes: Wheel zoom now correctly centers on mouse cursor position and no longer causes erratic panning

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>
---
 .../Controls/UnifiedAGVCanvas.Mouse.cs        | 24 ++++++++++---------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/Cs_HMI/AGVLogic/AGVNavigationCore/Controls/UnifiedAGVCanvas.Mouse.cs b/Cs_HMI/AGVLogic/AGVNavigationCore/Controls/UnifiedAGVCanvas.Mouse.cs
index 63bfaf3..a88484e 100644
--- a/Cs_HMI/AGVLogic/AGVNavigationCore/Controls/UnifiedAGVCanvas.Mouse.cs
+++ b/Cs_HMI/AGVLogic/AGVNavigationCore/Controls/UnifiedAGVCanvas.Mouse.cs
@@ -170,23 +170,25 @@ namespace AGVNavigationCore.Controls
 
         private void UnifiedAGVCanvas_MouseWheel(object sender, MouseEventArgs e)
         {
-            // 현재 마우스 위치를 월드 좌표로 변환 (줌 전)
-            var mouseWorldBefore = ScreenToWorld(e.Location);
+            // 마우스 커서 위치 (스크린 좌표)
+            Point mouseScreenPos = e.Location;
 
+            // 줌 전 마우스가 가리키는 월드 좌표
+            float worldX_before = (mouseScreenPos.X - _panOffset.X) / _zoomFactor;
+            float worldY_before = (mouseScreenPos.Y - _panOffset.Y) / _zoomFactor;
+
+            // 이전 줌 팩터 저장
             float oldZoom = _zoomFactor;
 
-            // 줌 팩터 계산 (휠 델타 기반) - 더 부드러운 줌
+            // 줌 팩터 계산 (휠 델타 기반)
             if (e.Delta > 0)
-                _zoomFactor = Math.Min(_zoomFactor * 1.15f, 5.0f);   // 확대 (더 부드러움)
+                _zoomFactor = Math.Min(_zoomFactor * 1.15f, 5.0f);   // 확대
             else
-                _zoomFactor = Math.Max(_zoomFactor / 1.15f, 0.1f);   // 축소 (더 부드러움)
+                _zoomFactor = Math.Max(_zoomFactor / 1.15f, 0.1f);   // 축소
 
-            // 줌 후 마우스 위치의 월드 좌표
-            var mouseWorldAfter = ScreenToWorld(e.Location);
-
-            // 마우스 위치가 같은 월드 좌표를 가리키도록 팬 오프셋 조정
-            _panOffset.X += (int)((mouseWorldBefore.X - mouseWorldAfter.X) * _zoomFactor);
-            _panOffset.Y += (int)((mouseWorldBefore.Y - mouseWorldAfter.Y) * _zoomFactor);
+            // 줌 후에도 마우스가 같은 월드 좌표를 가리키도록 팬 오프셋 조정
+            _panOffset.X = (int)(mouseScreenPos.X - worldX_before * _zoomFactor);
+            _panOffset.Y = (int)(mouseScreenPos.Y - worldY_before * _zoomFactor);
 
             Invalidate();
         }