Re: [Freeglut-developer] Losing window frame focus on MS Windows

[Philipp K. <phi...@gm...>]

Hi list,

The said bug (losing window frame focus on MS Windows) was introduced in r1525.

A look at the diff and consulting of the relevant MSDN page [1] show
why: the LSBit of GetAsyncKeyState() indicates whether "the key was
pressed after the previous call to GetAsyncKeyState". Moreover, it
recommends to "not rely on this (...) behavior", so it's best mask it
out unconditionally.

The attached patch fixes the window frame issue, but fg_main_mswin.c
contains a couple of other instances where that function's return
value is checked as-is -- apparently in the Shift/Alt/Menu handling
code. Personally, I'd AND with ~1 there, too, but it might be sensible
to produce a bug first.

[1] http://msdn.microsoft.com/en-us/library/windows/desktop/ms646293%28v=vs.85%29.aspx

--Philipp

On Wed, Sep 18, 2013 at 8:26 PM, Nigel Stewart <nig...@gm...> wrote:
> It might be helpful to try a few of the more recent releases to narrow
> down if this
> is some kind of regression.
>
> - Nigel
>
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