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[Windows] Window positions across monitors with different scale factors

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
55/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
活跃
技术栈
cpp
领域
desktop, operating-systems

调研方向

Locate the C++ implementations of Window::GetPosition(), SetPosition(), the bounds calls, and DisplayManager's display bounds handling. Trace the existing GetScaleFactorForWindow conversion and WM_DPICHANGED behavior; done means positions and sizes remain consistent when saving, restoring, or moving windows between monitors with different scale factors.

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描述

bug

On Windows, Window::GetPosition() / SetPosition() (and the bounds calls) convert between logical and physical pixels with the scale factor of the monitor the window is currently on (GetScaleFactorForWindow). With monitors at different scale factors, the same logical point maps to different physical points depending on where the window is. Saving a position on one monitor and restoring it (or restoring on another monitor) puts the window in the wrong place or makes it the wrong size.

Expected: one global coordinate space that matches DisplayManager's display bounds. That means converting with the scale factor of the monitor that contains the target point, and handling the WM_DPICHANGED resize that follows a move across monitors.

Background:

  • leanflutter/window_manager#474: getPosition/setPosition wrong with multiple scaled screens (also #448, #536, #589)
主要语言
C++
星标
34
派生
7
平均合并
3 天 1 小时
30 天内合并 PR
1

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