Re: An issue with libX11?

On 09/11/2014 20:49, Angelo Graziosi wrote:
> Il 09/11/2014 21:16, Jon TURNEY ha scritto:
>> On 09/11/2014 15:38, Angelo Graziosi wrote:
>>> From another application I have an issue with libX11 which I can
>>> reproduce with the following STC,
>>
>> I don't think this test case is well-formed.
>>
>>> int main()
>>> {
>>>    dis = XOpenDisplay(NULL);
>>>    win = XCreateSimpleWindow(dis, RootWindow(dis, 0), 1, 1, 500, 500,
>>>                              0, BlackPixel (dis, 0), BlackPixel(dis,
>>> 0));
>>>
>>>    XMapWindow(dis, win);
>>
>> A 'XSelectInput(dis, win, KeyPress)' is needed here to tell the X server
>> that this client wishes to receive KeyPress event.s
>
> I found the issue trying the examples of libXbgi library
> (http://libxbgi.sourceforge.net), so I tried to create a STC adapting
> the example discusses here:
>
> https://user.xmission.com/~georgeps/documentation/tutorials/Xlib_Beginner.html
>
>
> Anyway, the STC on Cygwin64 doesn't work if I add your suggestion,
>
> ...
> XMapWindow(dis, win);
> XSelectInput(dis, win, KeyPress);

Oops.  I think that should be KeyPressMask.

> XFlush(dis);
> ...
>
>>
>>> I am not an X11 expert, so it could be I am doing the wrong things but
>>> the same code runs fine on OSX+XQuartz and GCC-4.9.1.
>
> as I wrote, on OSX it works (there XQuartz is 2.7.7). For this reason I
> flagged this to X-Cygwin list..
>
>> I tried with XQuartz 2.7.8_beta1 and I couldn't reproduce that.
>
> On which system? OSX?

XQuartz doesn't run on anything else :D

-- 
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

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