From 54fac5d5df0f80c71cb153003e9e59c832fff2d4 Mon Sep 17 00:00:00 2001
From: ZerxLabBot <clown166997982@gmail.com>
Date: Tue, 28 Jul 2026 11:07:30 +0000
Subject: [PATCH] fix(desktop): correct context menu position under uiScale
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showContextMenu positioned the Overlay entry using the raw
GestureDetector globalPosition (real device coordinates from the
pointer event), while main.dart wraps the app's Navigator/Overlay in
UiScaleWidget whenever uiScale != 1.0, laying out that subtree (and
Overlay's own local coordinate space) at screen size / scale and
painting it back up by scale.

Positioned inside that Overlay is relative to the scaled-down local
frame, so feeding it the unscaled global tap position produced an
offset proportional to (scale - 1) times the distance from the
window origin — the further from the top-left the click, the further
the menu drifted from the cursor.

Convert globalPosition through the Overlay's own RenderBox via
globalToLocal before using it as left/top. This is a no-op when
uiScale == 1.0 (no transform in the ancestor chain), and correctly
inverts the RenderUiScale paint transform otherwise. showContextMenu
is the single entry point for every right-click menu in the app
(task rows, groups, sidebar, queues, header bar), so the fix covers
all of them.

Fixes #193
---
 lib/src/widgets/context_menu.dart | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/lib/src/widgets/context_menu.dart b/lib/src/widgets/context_menu.dart
index 62d19ce8..446d4282 100644
--- a/lib/src/widgets/context_menu.dart
+++ b/lib/src/widgets/context_menu.dart
@@ -70,9 +70,21 @@ void showContextMenu(
       dividers.length * dividerHeight +
       8; // vertical padding
 
+  // globalPosition 来自原始指针事件的设备全局坐标，未经界面缩放
+  // （uiScale，见 UiScaleWidget）逆变换；Overlay 的 Positioned 坐标系是
+  // 该缩放下的逻辑坐标系（与本函数下方 MediaQuery.size 一致，main.dart
+  // 通过 MediaQuery.copyWith(size: mq.size/scale) 同步缩小）。直接把
+  // globalPosition 当 Positioned.left/top 用，uiScale≠1.0 时菜单会按
+  // (scale-1) 比例整体偏离鼠标（issue #193）。经 Overlay 自身 RenderBox
+  // 做一次 globalToLocal 修正——scale==1.0（无变换）时是恒等映射，不影响
+  // 现有行为。
+  final overlayBox = overlay.context.findRenderObject() as RenderBox?;
+  final localPosition = overlayBox == null
+      ? globalPosition
+      : overlayBox.globalToLocal(globalPosition);
   final screenSize = MediaQuery.of(context).size;
-  double left = globalPosition.dx;
-  double top = globalPosition.dy;
+  double left = localPosition.dx;
+  double top = localPosition.dy;
 
   if (left + menuWidth > screenSize.width) {
     left = screenSize.width - menuWidth - 4;