[Bug 33467] Cannot bring Mac application in front of a Wine application in full screen mode

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=33467

--- Comment #2 from Ken Thomases <ken at codeweavers.com> 2013-04-27 12:51:59 CDT ---
Were you using the Mac driver in Wine 1.5.27?  It wasn't the default then, so
you would have had to go out of your way and edit a registry key.

The Mac driver was turned on by default in 1.5.28.  That, rather than any
change to the Mac driver itself, is probably what caused the change.  You can
check by reverting to Wine 1.5.27 but enabling the Mac driver.  That entails
creating the registry key HKEY_CURRENT_USER\Software\Wine\Drivers and, within
that, create a string value named "Graphics" with the value "mac".

However, I think the behavior is correct.  The full-screen program has set its
window to have the WS_EX_TOPMOST style, so it's supposed to put it in front of
all windows which don't have that style.  The Mac driver implements this by
putting the window at the "floating window" level.  So, only other floating
windows can come in front of it.

It is important that the Mac driver implement WS_EX_TOPMOST as a floating
window because not all such windows are full-screen.  For example, an app might
create a topmost "palette" that should be visible and accessible even in front
of other apps.  It is arguably a bug in XQuartz that it doesn't support this
mode of operation.

A relevant question, which I'm not sure you can answer, is what those same
full-screen programs do on Windows when you Alt-Tab away from them.  If they
change their window's style, minimize the window, hide it, or something like
that, then we should make sure that they do the same under the Mac driver. 
However, many full-screen Windows programs either don't allow you to Alt-Tab
away or don't behave any better than what you're describing.

As a possible feature request, we can consider adding a registry key that would
change the behavior of the Mac driver so that it demotes windows back to normal
when you switch to another app, but the default should probably still be to
honor the window style.

Lastly, as a workaround, you can hide the relevant Wine process.  This is
complicated by the fact that the Mac driver doesn't currently put a "Hide" item
in its Mac application menu.  That's on the to-do list for the Mac driver.  In
the meantime, you can use the Dock menu or the Command-Tab application switcher
to hide an app (while the switcher is showing, highlight the app, and press the
H key).

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