Re: rowspacing

I agree with Sam on what he wrote with one exception (it may be that we
agree, and that he wasn't completely precise in what he wrote):

As Sam wrote, 'rowspacing' does not include the extent of the row above or
below.  Also, it does *not* include the rowline itself, so if the line is
three pixels thick and rowspacing is 0, the line is *not* drawn inside of
the adjacent rows.

Neil Soiffer
Senior Scientist
Design Science, Inc.
www.dessci.com
~ Makers of MathType, MathFlow, MathPlayer, MathDaisy, Equation Editor ~




On Fri, Aug 13, 2010 at 3:37 PM, Sam Dooley <sam@integretechpub.com> wrote:

>  Hi Frédéric,
>
> These responses are my readings only, and may not agree with those
> of others in the WG.
>
>
> First, from 3.5.1.2 (after the big attribute table):
>
> "If there are more rows (resp., columns or gaps) than supplied values,
> the __last__ value is repeated as needed. If there are too many values
> supplied, the excess are ignored."  (emphasis mine)
>
> So the values should not cycle, as in your schematic, but Y_(n-1) is
> the only value that should repeat.
>
>
> Next, since rowspacing specifies the amount of space "between" rows,
> my reading is that the row spacing should not belong to the extent of
> either the row before it or the row after it, but it should position
> between the cells that make up the rows, as in your first diagram.
> I would expect the rowlines to draw within the rowspacing, and the
> background color of the adjacent cells to extend to the rowlines.
>
> But nearby CSS declarations could make some cases a bit interesting
> to work out.
>
> So as you suggest, the MathML rowspacing attribute seems not to give
> quite the same flexibility as the CSS margin/padding values, and
> corresponds exactly to neither, with regard to the bounding box
> of the cells in the table.
>
>
> Hope this helps,
> Sam
>
>
>
> At 04:03 PM 8/13/2010, Frédéric WANG wrote:
>
> Hi Math WG,
>
> First I give as attachment an image for the test
> Topics/EmbellishedOp/embStretch1 (in the current sample rendering, the
> parentheses do not seem to stretch).
>
> Now, I would like to have some precisions on the way rowspacing works. So
> suppose we have a mtable of N rows, framespacing="X,X" and rowspacing="Y0,
> Y2, ..., Y_(n-1)".
>
> I understand that rowspacing applies to each "gap" and so we have the
> following:
>
> ^
> | X
> V
> -----
> /////
> row0
> /////
> -----
> ^
> | Y_(0 mod n)
> V
> -----
> /////
> row1
> /////
> -----
> ^
> | Y_(1 mod n)
> V
> -----
> /////
> ...
> /////
> -----
> ^
> | Y_(N-2 mod n)
> V
> -----
> /////
> row_(N-1)
> /////
> -----
> ^
> | X
> V
>
> The problem of my interpretation is that "rowpadding" (i.e. spacing inside
> cells) seems undefined. Roger B. Sidje had a different interpretation. IIUC,
> he thought that rowspacing applies to each row and so wanted to split the
> values before and after:
>
> ^
> | X
> V
> -----
> ^
> | Y_(0 mod n)/2
> V
> row0
> ^
> | Y_(0 mod n)/2
> V
> -----
> ^
> | Y_(1 mod n)/2
> V
> row1
> ^
> | Y_(1 mod n)/2
> V
> -----
> ^
> | Y_(2 mod n)/2
> V
> ...
> ^
> | Y_(N-1 mod n)/2
> V
> -----
> ^
> | Y_(N-1 mod n)/2
> V
> row_(N-1)
> ^
> | Y_(N-1 mod n)/2
> V
> -----
> ^
> | X
> V
>
> Combining the two ideas, we get another possible interpretation: apply
> rowspacing to each gap but split the values inside and outside the cells:
>
> ^
> | X/2
> V
> -----
> ^
> | X/2
> V
> row0
> ^
> | Y_(0 mod n)/2
> V
> -----
> ^
> | Y_(0 mod n)/2
> V
> row1
> ^
> | Y_(1 mod n)/2
> V
> -----
> ^
> | Y_(1 mod n)/2
> V
> ...
> ^
> | Y_(N-2 mod n)/2
> V
> -----
> ^
> | Y_(N-2 mod n)/2
> V
> row_(N-1)
> ^
> | X/2
> V
> -----
> ^
> | X/2
> V
>
> and there are probably more interpretations...
>
> Thanks by advance for your answer(s).
> --
> Frédéric Wang.
> Website <http://www.maths-informatique-jeux.com/> - Weblog<http://www.maths-informatique-jeux.com/blog/frederic/>
>
>