user32: Don't crash for unknown button styles

[André Hentschel]

Am 07.08.2010 14:06, schrieb Nikolay Sivov:
>  On 8/7/2010 15:54, André Hentschel wrote:
>> Am 06.08.2010 20:44, schrieb Nikolay Sivov:
>>>   On 8/6/2010 22:22, André Hentschel wrote:
>>>> got that case with an MFC application which had a 3state radiobutton
>>>> with buttonstyle 15(decimal)
>>>> with this fix everything is fine as the painting of the button is
>>>> handled elsewhere, without that fix it crashes as it reads bad data
>>>> behind the array.
>>> This needs a test to see what happens visually for style 0xf, maybe we
>>> need just to duplicate an entry in paint function table; also while
>>> you're at it:
>>>
>>> static inline UINT get_button_type( LONG window_style )
>>> {
>>>      return (window_style&  0x0f);
>>> }
>>>
>>> here BS_TYPEMASK should be used instead of 0xf.
>>>
>> Ok ill do. Also it was a 3state checkbox not a radiobutton. Further i
>> made a typo in my oneline patch :)
>> But i am still not sure if we really should paint in that case
>> (unless some peoble come up with "invisible checkboxes"),
>> because in my case the dialog style was that "ms office 2007 style",
>> so mfc or the app handled the paint. if we would have drawn something
>> it would have make it worse.
> All I mean is that you need a small test app that creates button
> directly without any mfc wrappers or anything.
> Probably such style is even not accepted by control, or replaced with
> some other style.
> 
> If style is not accepted or replaced this should go directly to button
> tests, if it's accepted we need visually guess how it works and add a
> handler.
Ok i see.

-- 

Best Regards, André Hentschel