Re: Doc: NR 4.1.2: Reorganize vertical dimensions. (issue2316042)

[Carl Sorensen]

On 10/2/10 10:50 PM, "Joe Neeman" <address@hidden> wrote:
> 
> On Sat, Oct 2, 2010 at 8:08 PM,  <address@hidden> wrote:
>> On 2010/10/03 02:49:30, Mark Polesky wrote:
>>> On 2010/10/02 16:32:06, Carl wrote:
>> 
>> I don't think so.  I think 'padding is added as a rigid space interval,
>> hence my saying that it is added to the layout item above.
>> 
>> 'space should begin below 'padding IIUC.
> 
> The attachment point of 'space doesn't depend on 'padding (or
> 'minimum-distance). If you think in terms of springs, the beginning of one
> spring is always glued to the end of the previous one. 'padding and
> 'minimum-distance are only useful in determining the minimum lengths of the
> springs.
> 

What is the difference between 'padding and 'minimum-distance, then?

> 
>> Maybe.  It may be that the most natural reference points aren't easily
>> available.
> 
> The springs are always attached to the (0, 0) coordinate relative to each
> staff or markup. That is, each staff or markup draws itself and returns some
> stencil. The spacing code just attaches to the (0, 0) coordinate of that
> stencil. For staves, it's the middle staff line (unless you fiddle with
> line-positions). For markups, it used to be the baseline (I think). As long as
> the various drawing routines can be altered so that the stencil is drawn
> relative to its "most natural" reference point, then the spacing code will
> handle it. 
>  
>> I think we should document what we have, and make enhancement requests
>> for what we would *like* to have.  I don't think the exercise of "write
>> the documents for what we wish we had and then change the code to match"
>> is the best way to proceed.  But if Joe's ok with it, then my opinion is
>> irrelevant.
> 
> I don't have a strong opinion on this point. If you want to document the
> desired behaviour and add a critical issue, I'll probably be able to fix it in
> a reasonable time frame.

Great!

Carl