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Bug 4821

Summary: No restore event is emitted after unminimize
Product: SDL Reporter: ryven <ryven.mt>
Component: eventsAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: major    
Priority: P2 CC: asmith, sezeroz
Version: 2.0.10Keywords: target-2.0.12
Hardware: x86_64   
OS: Linux   
Attachments: Patch to fix the issue.

Description ryven 2019-10-08 19:59:13 UTC 
At least on X11, no SDL_WINDOWEVENT_RESTORED event is emitted after the window was unminimized.

This was caused by this commit:
https://github.com/SDL-mirror/SDL/commit/abcfcda0fcc3cdfac632077492b91041acd8890d

Reason:
In X11_DispathEvent on PropertyNotify on _NET_WM_STATE property change, if unminimized is happens, X11_DispatchMapNotify is called:
https://github.com/SDL-mirror/SDL/blob/master/src/video/x11/SDL_x11events.c#L1295 

X11_DispatchMapNotify tries to emit two events: 
* first SDL_SendWindowEvent(SDL_WINDOWEVENT_SHOWN) which resets the minimized flag (see commit),
* then SDL_SendWindowEvent(SDL_WINDOWEVENT_RESTORED) which expects minimized flag set, but it was reset by previous SHOWN event and hence it bails out not emitting RESTORED event:
https://github.com/SDL-mirror/SDL/blob/master/src/events/SDL_windowevents.c#L142
Comment 1 Alex Smith 2019-12-02 15:46:31 UTC 
I ran into this issue today. The attached patch fixes it for me.
Comment 2 Alex Smith 2019-12-02 15:47:05 UTC 
Created attachment 4085 [details]
Patch to fix the issue.
Comment 3 Sam Lantinga 2019-12-04 05:56:19 UTC 
Looks good, thanks!
https://hg.libsdl.org/SDL/rev/81ca537d1287