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From: heavy@zip.eecs.umich.edu (Richard Scott Hall)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: Getting ASCII value from scancode
Message-ID: <1991Apr27.172516.29313@zip.eecs.umich.edu>
Date: 27 Apr 91 17:25:16 GMT
References: <1991Apr26.232519.12216@zip.eecs.umich.edu> <80354@bu.edu.bu.edu>
Distribution: all
Organization: University of Michigan EECS Dept.
Lines: 49

In article <80354@bu.edu.bu.edu> harryk@bucsf.bu.edu (Harry Karayiannis) writes:
>In article <1991Apr26.232519.12216@zip.eecs.umich.edu> heavy@zip.eecs.umich.edu (Richard Scott Hall) writes:
>>
>>   it is possible to press any ALT+<key> sequence in my program.
>>   When I get a keyboard event, I get the keyboard state from
>>   vq_key_s() (i.e. shift/control/alt), but I get the scancode
>>   from evnt_keybd/multi.  So i guess what I am asking, is there
>>   anyway to go from scancode to ASCII without having to define
>>   all the values in my program?
>>
>>Richard Hall
>>University of Michigan
>
>	You should use evnt_keybd() which returns an integer.
>
>	Now, the high-order byte contains the scan code of the key pressed,
>	and the low-order byte contains the ASCII code.
>

Yes, it does, but not if someone presses 'ATL+A'.  The low order
bits in this case are zero.  I want to be able to see that they
pressed 'A' while holding down 'ATL'.  I can get the keyboard
state with vq_key_s() (this tells me if they are holding down
shift/control/alt), but what I need to know now is what ASCII
key they pressed with it.  So if I can get some method to find
this out, I won'd need some big if-then-else-if structure to
key for a specific value...for instance, 'ATL+A' = 0x1e00,
'ATL+B' = 0x3000.  Now the only what I know which ASCII key
they pressed is by having some code like:

     if (key == 0x1e00)
        c = 'A';
     else if (key == 0x3000)
        c = 'B';
     .
     .
     .

     ad infinitum

I don't really want to do this, but it might be necessary.

Richard Hall
University of Michigan

-- 

Standard disclaimer:  I am not me, I am who you think you are...
                      so don't blame me.