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Bug 1034 - SDL_GetAppState not returning correct values if ALT+TAB used in application
Summary: SDL_GetAppState not returning correct values if ALT+TAB used in application
Status: RESOLVED FIXED
Alias: None
Product: SDL
Classification: Unclassified
Component: events (show other bugs)
Version: 1.2.14
Hardware: Other Windows 7
: P2 normal
Assignee: Ryan C. Gordon
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks: 1035
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Reported: 2010-07-28 12:59 UTC by zicodxx
Modified: 2011-12-29 01:30 UTC (History)
1 user (show)

See Also:

Attachments
Patch to fix this bug and bug 1035. (632 bytes, patch)
2011-04-28 17:31 UTC, Alex Volkov 		Details | Diff
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Description zicodxx 2010-07-28 12:59:27 UTC 
Again another bug I encountered on Windows 7:

Assuming I hide my mouse cusor with SDL_ShowCursor(SDL_DISABLE).
Now if my app runs on Fullscreen, I tend to "get out" of it using ALT+TAB. This will minimize the app. However SDL_GetAppState will STILL report SDL_APPACTIVE, SDL_APPINPUTFOCUS and SDL_APPMOUSEFOCUS.

Also if I check event.active.gain, this *seems* (as much as I could find out) to be set twice (first 0 then 1 again) while going out of the app with ALT+TAB. I am not perfectly sure here but even if the app is minimized because of ALT+TAB (or also CTRL+ESC), event.active.gain is 1.
Comment 1 Alex Volkov 2011-04-28 17:19:26 UTC 
This happens with the windib driver. Windows posts the WM_ACTIVATE WA_INACTIVE event with minimized==false when you Alt+Tab out of a fullscreen app. Responding to this event, wincommon/SDL_sysevents.c:WinMessage() calls ShowWindow(,SW_MINIMIZE) via SDL_RestoreDesktopMode, but another WM_ACTIVATE event is not posted in response to that.
Whatever the case may be, WinMessage() should just treat a fullscreen app receiving WA_INACTIVE the same as a minimized app. Additionally, it's probably a good idea to clear SDL_APPMOUSEFOCUS at the same time, and that should take care of bug #1035.
Comment 2 Alex Volkov 2011-04-28 17:31:38 UTC 
Created attachment 605 [details]
Patch to fix this bug and bug 1035.
Comment 3 Sam Lantinga 2011-12-29 01:30:37 UTC 
Fixed, thanks!
http://hg.libsdl.org/SDL/rev/676a54593bc4