Re: What's up with fill-line?

[Alexander Kobel]

Carl Sorensen wrote:
> If fill-line has one argument, it's centered.
>
> If fill-line has two arguments, the first is left-aligned, the second is
> right-aligned.
>
> If fill-line has three or more arguments, the following rules apply:
> The first argument to fill-line is left aligned.
> The last argument to fill-line is right aligned
> The remainder are centered on columns that are equally distributed.
> [...]
> It seems to me like your tagline here is exactly what you asked for:
>
> fill the line  with three arguments:  a bar, a markup, and a bar.
>
> The markup is the combination of a right-column with a left-column, which
> glues the two columns together (the first is right aligned, the second is
> left aligned).  The combined markup is centered in the tagline.
>
> What is wrong with this output?

Ah, well. It was a bad example, I guess. Actually, it's four columns, 
since the two in the middle are not combined, and I expected a gap of 
the same distance between each of the columns. But with your 
explanations from above (which are not at all what I expect from the 
documentation of fill-line, although I see the rationale behind) it 
makes sense. I still don't see why there is space "wasted" and the line 
exceeds the right boundary, though.
On the other hand, if I really want equal distribution in the sense of 
equal distance between _each_ two adjacent elements, regardless of their 
extent, is there a command to do so? Like an \hfill in LaTeX?


Besides, I mixed up two different problems in the tagline. Still open: 
How do I make a simple tagline, like
        \fill-line { LilyPond-left   Author-right },
behave correct? Just stating tagline = ... is not enough, since then I 
run into the nested fill-line. Do I really have to override oddFooterMarkup?
As you said, a single fill-line argument should be centered, so there 
should not be a horizontal offset. Why is this not the case if it's 
again a fill-line command (or, I guess, any other markup taking the 
whole line width)?

To me, it looks like there is a \null element inserted at the beginning 
(and probably also at the end) if only one argument is given. Which 
would explain both the dependency of word-space and the remaining micro 
offset even if word-space = 0.

Well, with the fixed oddFooterMarkup, _I_'m fine for now, but it's not 
quite the most user-friendly way...


Thanks,
Alexander