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fix(desktop): correct context menu position under uiScale #213

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Merged
zerx-lab merged 1 commit into from
Jul 29, 2026
Merged

fix(desktop): correct context menu position under uiScale #213

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16 changes: 14 additions & 2 deletions lib/src/widgets/context_menu.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -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;
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