Re: attroff and COLOR_PAIR

[Dulek]

I hoped that this is not the only way. Thanks anyway. :)

Thomas Dickey-2 wrote:
> 
> On Tue, 26 Oct 2010, Dulek wrote:
> 
>>
>> So what can I do about it? How to make a workaround?
> 
> It seems that you're asking how to store more than one color in a given
> location (like a stack).  For that, you'll have to make some storage in
> your program, and manage it.  Lynx does that, for instance, for its 
> "color-style" displays.
> 
>> Thomas Dickey-2 wrote:
>>>
>>> On Tue, 26 Oct 2010, Dulek wrote:
>>>
>>>> Look at this piece of code:
>>>>
>>>> attron(COLOR_PAIR(1));
>>>> addstr("a");
>>>> attron(COLOR_PAIR(2));
>>>> addstr("b");
>>>> attroff(COLOR_PAIR(2));
>>>> addstr("c");
>>>> attroff(COLOR_PAIR(1));
>>>> refresh();
>>>>
>>>> According to  http://www.mkssoftware.com/docs/man3/curs_attr.3.asp
>>>> manual
>>>> :
>>>
>>> fwiw, the mks page is an old port of ncurses (from the late 1990's
>>> iirc).
>>>
>>> There's a current set of manpages on my website, e.g.,
>>>
>>> http://invisible-island.net/ncurses/man/curs_attr.3x.html
>>>
>>>> The routine attroff() turns off the named attributes without turning
>>>> any
>>>> other attributes on or off.
>>>>
>>>> This means, that this code should display 'a' in COLOR_PAIR(1) color,
>>>> 'b'
>>>> in
>>>> COLOR_PAIR(2) color, and 'c' in COLOR_PAIR(1) color. Unfortunately 'c'
>>>> is
>>>> displayed in default terminal color. Why this is happening?
>>>
>>> As far as attron/attroff are concerned, the whole field masked by
>>> A_COLOR
>>> is a single attribute.
>>>
>>> By the way, this is an extension from X/Open, because it accepts color
>>> as
>>> one of the attributes (matching the SVr4 implementation).  X/Open only
>>> defines attr_on/attr_off, which separates color from the other
>>> attributes
>>> (because it's allowing for color pairs past the 6-8 bits used for
>>> implementing A_COLOR).
>>>
>>> --
>>> Thomas E. Dickey
>>> http://invisible-island.net
>>> ftp://invisible-island.net
>>>
>>> _______________________________________________
>>> Bug-ncurses mailing list
>>> address@hidden
>>> http://lists.gnu.org/mailman/listinfo/bug-ncurses
>>>
>>>
>>
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> 
> -- 
> Thomas E. Dickey
> http://invisible-island.net
> ftp://invisible-island.net
> 
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