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[Windows/Linux] Implement SetFocusable and SetNonActivating

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
55/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Active
Tech stack
cpp, linux

Research direction

Locate the platform-specific implementations of Window::SetFocusable() and SetNonActivating(), then inspect the Windows mouse-activation path and the Linux GTK window setup. Compare the behavior with macOS and evaluate the suggested WS_EX_NOACTIVATE/MA_NOACTIVATE and GTK focus APIs. Done means a window can be clicked without taking focus from the app receiving keyboard input on both platforms.

Written by the indexing model from the issue text.

Description

bug

Window::SetFocusable() is a stub on Windows and Linux, and SetNonActivating() only records the flag there. Only macOS implements them. An on-screen keyboard or a floating palette needs a window that can be clicked without taking focus from the app the user is typing into.

Possible implementation: Windows WS_EX_NOACTIVATE (plus MA_NOACTIVATE for WM_MOUSEACTIVATE); Linux gtk_window_set_accept_focus() / gtk_window_set_focus_on_map().

Background:

  • leanflutter/window_manager#404: focus issue while building a virtual keyboard (Windows)
  • leanflutter/window_manager#317: implement setFocusable
Dominant language
C++
Stars
34
Forks
7
Avg merge
3d 1h
Merged PRs (30d)
1

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