Re: Alt+Tab in fullscreen with no other apps running

Replying to my own post...

I eventually got it working by recording the HWND passed with the 
WM_CANCELMODE message, then next time around my game loop calling 
ShowWindow( hWnd, SW_MINIMIZE ). This may not be the ideal solution to the 
problem so I'd still be interested in hearing if there's a better way.

Thanks to all who helped,

Oscar.


----- Original Message ----- 
From: "Oscar Cooper" <[email protected]>
To: "Game Development for MS Windows" 
<[email protected]>
Sent: Thursday, September 06, 2007 12:54 PM
Subject: Re: [GD-Windows] Alt+Tab in fullscreen with no other apps running


>I still haven't got this working, testing under WinXP :-(
>
> Alen's idea gets me most of the way there, but my window gets restored
> immediately after being minimised. Looking through the windows message
> trace, it looks like the minimise completes successfully: the 
> WM_SYSCOMMAND
> triggers a bunch of further messages including the WM_ACTIVATE 
> (WA_INACTIVE)
> and WM_ACTIVATEAPP (wParam=FALSE). However I then immediately get a
> WM_ACTIVATE (WA_ACTIVE) message, which I assume is generated by Windows in
> response to certain properties of my window or because I'm not handling 
> some
> messages correctly.
>
> In addition to Alen's code I've also tried experimenting with the window
> style flags, and even tried calling SetWindowPos to force my window first 
> to
> the bottom of the z-order and then again to put it back on top, to make 
> sure
> it's not TOPMOST, but I'm still missing something.
>
> I hate working with API's I don't know very well, I feel like such a n00b
> ;->
>
> Can anyone bail me out?
>
> Cheers,
>
> Oscar.
>
>
>
> ----- Original Message ----- 
> From: "Alen Ladavac" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, September 04, 2007 5:03 PM
> Subject: Re: [GD-Windows] Alt+Tab in fullscreen with no other apps running
>
>
>> Hi Oscar,
>>
>> IIRC, we've always been doing something like
>>
>>      if( (msg.message==WM_ACTIVATE && (LOWORD(msg.wParam)==WA_INACTIVE ||
>> HIWORD(msg.wParam)))
>>       ||  msg.message==WM_CANCELMODE
>>       ||  msg.message==WM_KILLFOCUS
>>       || (msg.message==WM_ACTIVATEAPP && !msg.wParam)) {
>>
>>         if (bInFullScreen) {
>>           PostMessage(NULL, WM_SYSCOMMAND, SC_MINIMIZE, 0);
>>         }
>>
>> That seems to work for us, YMMV.
>>
>> HTH,
>> Alen
>>
>> Oscar wrote:
>>
>>> Hi,
>>
>>> Does anyone know if there's something I have to do (or avoid doing) to
>>> make
>>> my game minimise when the player hits Alt+Tab whilst running in
>>> fullscreen
>>> with no other apps running?
>>
>>> My game isn't minimising in pre-Vista versions of Windows, but other
>>> games
>>> seem to do so. Windows isn't sending me any WM_ACTIVATE or 
>>> WM_ACTIVATEAPP
>>> messages. I am getting WM_NCACTIVATE and WM_CANCELMODE, and I'm passing
>>> these on to the default WndProc expecting it to handle any necessary
>>> plumbing.
>>
>>> With other apps running the Alt+Tab behaviour is correct in fullscreen,
>>> but
>>> in this case Windows is sending me a completely different sequence of
>>> messages.
>>
>>> Thanks in advance,
>>
>>> Oscar Cooper
>>> Lead Programmer
>>> Frontier Developments Ltd
>>
>>
>>
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