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Bug 4939 - Keys can get stuck in pressed state
Summary: Keys can get stuck in pressed state
Status: NEW
Alias: None
Product: SDL
Classification: Unclassified
Component: video (show other bugs)
Version: 2.0.10
Hardware: All Windows (All)
: P2 normal
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords: target-2.0.16
Depends on:
Blocks:
 
Reported: 2020-01-13 14:00 UTC by Rokas Kupstys
Modified: 2020-07-16 18:29 UTC (History)
0 users

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Description Rokas Kupstys 2020-01-13 14:00:12 UTC 
Steps:
1. Open SDL application and have it's window focused.
2. Press LGUI+v

Result:
Builtin windows clipboard utility pops up and SDLK_LGUI is not reported as released even though GetKeyState(VK_LWIN) does report key as released.

Expected result:
SDL should report SDLK_LGUI as released.

Cause:
Win32 does not send WM_KEYUP message.

Originally reported at: https://github.com/ocornut/imgui/issues/2976
Comment 1 Rokas Kupstys 2020-01-13 14:47:47 UTC 
Actually this is true for every key. If key is released while window does not have focus VM_KEYUP will not be sent to that window.
Comment 2 Rokas Kupstys 2020-01-17 11:00:27 UTC 
For reference, this is how GLFW fixed it: https://github.com/glfw/glfw/commit/562c17d131bd99d92f1166e2a8a42d7af023d122