Stretching width in natural TABLEs

Stretching width in natural TABLEs

[Aditya Mahajan]

Hi,

Is it possible to stretch the widths of each column in natural TABLEs, so 
that the widths are in a certain propotion? For example, suppose I have a 
table with three columns and I want to set the width of the first column 
to a fixed amount, and split the remaining space between columns two and 
three in a 1:2 ratio.

Extreme tables implement something similar using option={stretch, width}, 
but AFAIU, it is not possible to fix the width of a particular column.

Aditya
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Re: Stretching width in natural TABLEs

[Michael Rogers]

If you know the width of the first column and total width, then you can use arithmetic, as in the example below.  But perhaps this already occurred to you, and you were wondering if the widths and stretching can be handled automatically -- the short answer is I don't know.    

\starttext
\setupTABLE[c][1][width={2cm}]
\setupTABLE[c][2][width={\dimexpr(\textwidth-2cm)/3\relax}]
\setupTABLE[c][3][width={\dimexpr(\textwidth-2cm)* 2 / 3\relax}]
\startTABLE
\NC One \NC Two \NC Three \NC\NR
\NC A \NC B \NC C \NC\NR
\stopTABLE
\stoptext


On Sep 2, 2012, at 12:24 PM, Aditya Mahajan wrote:

> Hi,
> 
> Is it possible to stretch the widths of each column in natural TABLEs, so that the widths are in a certain propotion? For example, suppose I have a table with three columns and I want to set the width of the first column to a fixed amount, and split the remaining space between columns two and three in a 1:2 ratio.
> 
> Extreme tables implement something similar using option={stretch, width}, but AFAIU, it is not possible to fix the width of a particular column.
> 
> Aditya
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
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Re: Stretching width in natural TABLEs

[Aditya Mahajan]

On Mon, 3 Sep 2012, Michael Rogers wrote:

> On Sep 2, 2012, at 12:24 PM, Aditya Mahajan wrote:
>
>> Is it possible to stretch the widths of each column in natural TABLEs, 
>> so that the widths are in a certain propotion? For example, suppose I 
>> have a table with three columns and I want to set the width of the 
>> first column to a fixed amount, and split the remaining space between 
>> columns two and three in a 1:2 ratio.
>>

> If you know the width of the first column and total width, then you can use arithmetic, as in the example below.  But perhaps this already occurred to you, and you were wondering if the widths and stretching can be handled automatically -- the short answer is I don't know.
>
> \starttext
> \setupTABLE[c][1][width={2cm}]
> \setupTABLE[c][2][width={\dimexpr(\textwidth-2cm)/3\relax}]
> \setupTABLE[c][3][width={\dimexpr(\textwidth-2cm)* 2 / 3\relax}]
> \startTABLE
> \NC One \NC Two \NC Three \NC\NR
> \NC A \NC B \NC C \NC\NR
> \stopTABLE
> \stoptext

Apart from being hard to maintain, this works well if I know the width of 
a cell in advance. But most of the time I want something the width of the 
fixed column to be determined using width=fit option, so I cannot 
precompute the width of other columns.

Aditya
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Re: Stretching width in natural TABLEs

[Aditya Mahajan]

On Sun, 2 Sep 2012, Aditya Mahajan wrote:

> Hi,
>
> Is it possible to stretch the widths of each column in natural TABLEs, so 
> that the widths are in a certain propotion? For example, suppose I have a 
> table with three columns and I want to set the width of the first column to a 
> fixed amount, and split the remaining space between columns two and three in 
> a 1:2 ratio.
>
> Extreme tables implement something similar using option={stretch, width}, but 
> AFAIU, it is not possible to fix the width of a particular column.

I notice that

\setupTABLE[c][1][width=fit]
\setupTABLE[c][2][width=broad]
\setupTABLE[c][3][width=broad]

splits the remaining space equally between columns 2 and 3.

So, after starting at the code of pack-rul for a while, I realized that

\setupTABLE[c][1][width=fit]
\setupTABLE[c][2][width=0.33\hsize]
\setupTABLE[c][3][width=0.66\hsize]

should work and it does!

Now if someone could explain WHY it works, I'll be enlightened.

Aditya
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Re: Stretching width in natural TABLEs

[Rogers, Michael K]

On Sep 3, 2012, at 9:39 PM, Aditya Mahajan wrote:

> On Mon, 3 Sep 2012, Michael Rogers wrote:
>
>> On Sep 2, 2012, at 12:24 PM, Aditya Mahajan wrote:
>>
>>> Is it possible to stretch the widths of each column in natural TABLEs, so that the widths are in a certain propotion? For example, suppose I have a table with three columns and I want to set the width of the first column to a fixed amount, and split the remaining space between columns two and three in a 1:2 ratio.
>>>
>
>> If you know the width of the first column and total width, then you can use arithmetic, as in the example below.  But perhaps this already occurred to you, and you were wondering if the widths and stretching can be handled automatically -- the short answer is I don't know.
>>
>> \starttext
>> \setupTABLE[c][1][width={2cm}]
>> \setupTABLE[c][2][width={\dimexpr(\textwidth-2cm)/3\relax}]
>> \setupTABLE[c][3][width={\dimexpr(\textwidth-2cm)* 2 / 3\relax}]
>> \startTABLE
>> \NC One \NC Two \NC Three \NC\NR
>> \NC A \NC B \NC C \NC\NR
>> \stopTABLE
>> \stoptext
>
> Apart from being hard to maintain, this works well if I know the width of a cell in advance. But most of the time I want something the width of the fixed column to be determined using width=fit option, so I cannot precompute the width of other columns.
>
> Aditya

That's what I was afraid.  It's just I had the same problem last week, and a deadline made me settle for the ad hoc approach.  You made me curious enough to go look at the source, and one can hack it to work.  See below, if interested.  Not optimal, and might break in future.

By the way, what you posted in your other message,

> \setupTABLE[c][1][width=fit]
> \setupTABLE[c][2][width=0.33\hsize]
> \setupTABLE[c][3][width=0.66\hsize]

extends into the right margin by the width of the first column or thereabouts, for me.

Michael

The hack:

\unprotect
% adapted from \tabl_ntb_stretch_widths, tabl-ntb.mkiv, ll. 1296f
\def\tabl_ntb_mystretch_widths % more variants, e.g. a max to \dimend
  {\ifcase\c_tabl_ntb_maximum_col\else % else division by zero
     \!!dimend\zeropoint
     \!!dimene\hsize
     \dorecurse\c_tabl_ntb_maximum_col
       {\advance\!!dimend\dimexpr\tabl_ntb_get_wid\recurselevel+\naturaltablelocalparameter\c!columndistance\relax
        \advance\!!dimene-\tabl_ntb_get_dis\recurselevel}%
     \advance\!!dimend\dimexpr-\naturaltablelocalparameter\c!columndistance+\naturaltablelocalparameter\c!leftmargindistance+\naturaltablelocalparameter\c!rightmargindistance\relax
     % distribute width (stretch)
     \ifdim\!!dimend<\!!dimene
       \advance\!!dimend-\!!dimene
       \!!dimend-\!!dimend
%      \divide\!!dimend\c_tabl_ntb_maximum_col
%       \dorecurse\c_tabl_ntb_maximum_col
%         {\tabl_ntb_set_wid\recurselevel{\the\dimexpr\tabl_ntb_get_wid\recurselevel+\!!dimend\relax}}%
       \divide\!!dimend3  %%% divide remainder into three equal parts
       {\tabl_ntb_set_wid2{\the\dimexpr\tabl_ntb_get_wid2+\!!dimend\relax}}%%% add one part to 2nd column
       {\tabl_ntb_set_wid3{\the\dimexpr\tabl_ntb_get_wid3+\!!dimend * 2\relax}}%%% add two parts to 3rd column
     \fi
   \fi}
\def\usemystretch{\let\tabl_ntb_stretch_widths\tabl_ntb_mystretch_widths}
\protect

\starttext
\startsetups mystretch
   \usemystretch
   \setupTABLE[option=stretch]
\stopsetups
\startTABLE[setups=mystretch]
\NC One \NC Two \NC Three \NC\NR
\NC A \NC B \NC C \NC\NR
\stopTABLE
\stoptext

BTW, the above could be adapted to a key of the form stretch={n1,n2,...} (e.g. stretch={0,1,2}) which would divide the remaining proportionally.  Maybe not worth doing, though...maybe harder than I think -- the table stuff is complicated, and I'm assuming that since it worked once, I haven't messed anything up.

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Re: Stretching width in natural TABLEs

[Aditya Mahajan]

On Tue, 4 Sep 2012, Rogers, Michael K wrote:

>
> On Sep 3, 2012, at 9:39 PM, Aditya Mahajan wrote:
>
>> On Mon, 3 Sep 2012, Michael Rogers wrote:
>>
>>> On Sep 2, 2012, at 12:24 PM, Aditya Mahajan wrote:
>>>
>>>> Is it possible to stretch the widths of each column in natural TABLEs, so that the widths are in a certain propotion? For example, suppose I have a table with three columns and I want to set the width of the first column to a fixed amount, and split the remaining space between columns two and three in a 1:2 ratio.
>>>>
>>
>>> If you know the width of the first column and total width, then you can use arithmetic, as in the example below.  But perhaps this already occurred to you, and you were wondering if the widths and stretching can be handled automatically -- the short answer is I don't know.
>>>
>>> \starttext
>>> \setupTABLE[c][1][width={2cm}]
>>> \setupTABLE[c][2][width={\dimexpr(\textwidth-2cm)/3\relax}]
>>> \setupTABLE[c][3][width={\dimexpr(\textwidth-2cm)* 2 / 3\relax}]
>>> \startTABLE
>>> \NC One \NC Two \NC Three \NC\NR
>>> \NC A \NC B \NC C \NC\NR
>>> \stopTABLE
>>> \stoptext
>>
>> Apart from being hard to maintain, this works well if I know the width of a cell in advance. But most of the time I want something the width of the fixed column to be determined using width=fit option, so I cannot precompute the width of other columns.
>>
>> Aditya
>
> That's what I was afraid.  It's just I had the same problem last week, and a deadline made me settle for the ad hoc approach.  You made me curious enough to go look at the source, and one can hack it to work.  See below, if interested.  Not optimal, and might break in future.
>
> By the way, what you posted in your other message,
>
>> \setupTABLE[c][1][width=fit]
>> \setupTABLE[c][2][width=0.33\hsize]
>> \setupTABLE[c][3][width=0.66\hsize]
>
> extends into the right margin by the width of the first column or thereabouts, for me.

Ah, thats makes more sense. I was so happy to see the right ratio of the 
widths, that I did not notice that.

> The hack:

Thanks. I'll play around with it tomorrow.

Aditya
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Re: Stretching width in natural TABLEs

[Procházka Lukáš Ing. - Pontex s. r. o.]

Hello,

On Tue, 04 Sep 2012 05:02:01 +0200, Rogers, Michael K <mroge02@emory.edu> wrote:

> That's what I was afraid.  It's just I had the same problem last week, and a deadline made me settle for the ad hoc approach.

I was trying to solve the same situation several week ago.

Finally, I measured what the "fit" option of the first column mean in real units (cm) and I altered widths of remaining columns to get \textwidth in total, which is ugly and non-systematic solution.

So it seems that there is a task for natural TABLEs:

"
Suppose one or more columns have "fit" width, so the width is computed at run-time.
Suppose the total width of the table is defined, too.
How to specify width of other columns to have a specified ratio?
"

E.g.:

col1.width="fit" -> will be a concrete value at run-time, 'col1.width.real'
col2.width="fit" -> will be a concrete value at run-time, 'col2.width.real'
TABLE.tot.width=\textwidth
col3.width."weight"=1
col4.width."weight"=2

should give

col3.width =
   (TABLE.tot.width - col1.width.real - col2.width.real) / (col3.width."weight" + col4.width."weight") * col3.width."weight"

col4.width =
   (TABLE.tot.width - col1.width.real - col2.width.real) / (col3.width."weight" + col4.width."weight") * col4.width."weight"

Best regards,

Lukas


-- 
Ing. Lukáš Procházka [mailto:LPr@pontex.cz]
Pontex s. r. o.      [mailto:pontex@pontex.cz] [http://www.pontex.cz]
Bezová 1658
147 14 Praha 4

Tel: +420 244 062 238
Fax: +420 244 461 038

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