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Bug 3210

Summary: WinRT: alt-tab doesn't work correctly with full-screened, UWP (Win10 Store) apps
Product: SDL Reporter: David Ludwig <dll>
Component: videoAssignee: David Ludwig <dll>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: HG 2.0   
Hardware: All   
OS: Other   

Description David Ludwig 2015-12-22 05:21:09 UTC 
Steps to Reproduce: 
1. launch app 
2. observe app opens in full-screen mode 
3. press Alt-Tab (to switch away from app) 

Observed Results: 
* app is still on-screen, albeit in windowed mode, possibly with one or more windows on top of it 
* alt-tabbing back to app doesn't restore fullscreen mode 

Expected Results: 
* app is minimized, and not on-screen 
* alt-tabbing back to app restores fullscreen mode
Comment 1 David Ludwig 2015-12-22 06:04:10 UTC 
Fixed via https://hg.libsdl.org/SDL/rev/bcb6bd590d03
Comment 2 David Ludwig 2015-12-22 06:11:18 UTC 
To note, it looks like alt-tab in other full-screened Win10/UWP games, including at least one Microsoft one (Minecraft Win10 edition; there's no Win10 CoreWindow sample apps, AFAIK), only ever minimize the window if there is at least one other window to alt-tab to.  If the game is the only window, alt-tab doesn't appear to minimize the game window.
Comment 3 David Ludwig 2015-12-22 06:37:00 UTC 
(In reply to David Ludwig from comment #2)
> To note, it looks like alt-tab in other full-screened Win10/UWP games,
> including at least one Microsoft one (Minecraft Win10 edition; there's no
> Win10 CoreWindow sample apps, AFAIK), only ever minimize the window if there
> is at least one other window to alt-tab to.  If the game is the only window,
> alt-tab doesn't appear to minimize the game window.

Correction: there are no *fullscreen-capable* Win10 CoreWindow sample apps (provided by Microsoft), that I am aware of.  Microsoft does provide a few CoreWindow app templates with MSVC 2015, however they default to windowed-mode, do not provide controls to go fullscreen, and do not provide any direct calls to Win10's full-screen APIs.