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Bug 1347

Summary: No SDL_WINDOWEVENT_FOCUS_GAINED event when fullscreen
Product: SDL Reporter: Vern Jensen <vern>
Component: eventsAssignee: Sam Lantinga <slouken>
Status: RESOLVED INVALID QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: HG 2.0   
Hardware: x86   
OS: Windows (XP)   

Description Vern Jensen 2011-12-20 11:31:05 UTC 
Version: SDL-1.3.0-5605

When my SDL application is fullscreen and I alt-tab out, I get a SDL_WINDOWEVENT_FOCUS_LOST event, but never get a SDL_WINDOWEVENT_FOCUS_GAINED when clicking on the tab in the Windows taskbar to resume. Nor do I get a SDL_WINDOWEVENT_RESTORED event!

I outputted to a file a log of events I got when alt-tabbing out and then clicking on the tab to restore, printing the value of the event->window.event field. This is what I got:

Window event: 13 "focus lost"
Window event: 3 "window exposed"
Window event: 7 "minimized"
Window event: 4  "window moved"
Window event: 5  "resized"
[quit]

As you can see, there is no SDL_WINDOWEVENT_FOCUS_GAINED or SDL_WINDOWEVENT_RESTORED event.

This bug ONLY happens when fullscreen. When I'm in windowed mode, I get event 12 (SDL_WINDOWEVENT_FOCUS_GAINED) as soon as the user clicks on the tab in the windows task bar.
Comment 1 Vern Jensen 2011-12-20 12:17:35 UTC 
My bad. Turns out that after a window resize event, I was flushing other window events, in an attempt to flush window-resize events generated by my own call to SDL_SetWindowSize(). But this in turn was also flushing the window-activated events. D'oh!