* offset for background overlay
@ 2020-04-11 14:15 mf
2020-04-11 17:41 ` Hans Hagen
0 siblings, 1 reply; 7+ messages in thread
From: mf @ 2020-04-11 14:15 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hello list,
this MWE is a simplified version of a real case:
\startuseMPgraphic{cell:triangle}
path p ; p := unittriangle rotated 90 xscaled 2.5 OverlayWidth
yscaled 2.5 OverlayHeight ;
draw p withcolor red ;
\stopuseMPgraphic
\defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
\starttext
\bTABLE[frame=off]
\bTR
\bTD[nx=2,background=triangle,align=middle] \dontleavehmode a\crlf
text \eTD
\eTR
\bTR[toffset=1mm]
\bTD left \eTD
\bTD right \eTD
\eTR
\eTABLE
\stoptext
The triangle is used as background of the 2-column wide cell of the
first row.
I want the triangle to go around the second row too, as if it were a
frame for all the 3 cells. It means that it should be shifted down a bit.
So I tried this:
\startuseMPgraphic{cell:triangle}
path p ; p := unittriangle rotated 90 xscaled 2.5 OverlayWidth
yscaled 2.5 OverlayHeight ;
draw p shifted (0,-3mm) withcolor red ;
\stopuseMPgraphic
...
but it does not work, because the content of the background is centered
on the cell, so "shifted (0,-3mm)" has no effect.
The only solution I found is drawing something above the triangle with a
neutral color, so that the whole background is centered in the cell and
the red triangle goes down:
\startuseMPgraphic{cell:triangle}
path p ; p := unittriangle rotated 90 xscaled 2.5 OverlayWidth
yscaled 2.5 OverlayHeight ;
fill p shifted (0,6mm) withcolor white ; % only to move the next one down
draw p withcolor red ;
\stopuseMPgraphic
\defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
\starttext
\bTABLE[frame=off]
\bTR
\bTD[nx=2,background=triangle,align=middle] \dontleavehmode a\crlf
text \eTD
\eTR
\bTR[toffset=1mm]
\bTD left \eTD
\bTD right \eTD
\eTR
\eTABLE
\stoptext
It's a dirty trick. I'm sure there's a cleaner way.
Does anybody know it?
Thanks,
Massi
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: offset for background overlay
2020-04-11 14:15 offset for background overlay mf
@ 2020-04-11 17:41 ` Hans Hagen
2020-04-11 18:11 ` Wolfgang Schuster
0 siblings, 1 reply; 7+ messages in thread
From: Hans Hagen @ 2020-04-11 17:41 UTC (permalink / raw)
To: mailing list for ConTeXt users, mf
On 4/11/2020 4:15 PM, mf wrote:
> Hello list,
> this MWE is a simplified version of a real case:
>
> \startuseMPgraphic{cell:triangle}
> path p ; p := unittriangle rotated 90 xscaled 2.5 OverlayWidth
> yscaled 2.5 OverlayHeight ;
> draw p withcolor red ;
> \stopuseMPgraphic
> \defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
> \starttext
> \bTABLE[frame=off]
> \bTR
> \bTD[nx=2,background=triangle,align=middle] \dontleavehmode a\crlf
> text \eTD
> \eTR
> \bTR[toffset=1mm]
> \bTD left \eTD
> \bTD right \eTD
> \eTR
> \eTABLE
> \stoptext
here's a very ugly solution
\startuseMPgraphic{cell:triangle}
fill llcorner OverlayBox
-- lrcorner OverlayBox
-- (center bottomboundary OverlayBox shifted
(0,\MPy{foo:2}-\MPh{foo:2}+\MPd{foo:2}-\MPy{foo:1}))
-- cycle
withcolor red ;
setbounds currentpicture to OverlayBox ;
\stopuseMPgraphic
\defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
\starttext
\bTABLE[frame=off]
\bTR
\bTD[nx=2,align=middle,height=0pt,background=triangle]\xypos{foo:1}\eTD
\eTR
\bTR
\bTD[nx=2,align=middle] \dontleavehmode a\crlf text \eTD
\eTR
\bTR[toffset=1mm]
\bTD \hpos{foo:2}{\strut} left \eTD
\bTD right \eTD
\eTR
\eTABLE
\stoptext
it is probably possible to get some info otherwise (more efficient) if
really needed (if we add some helpers)
Hans
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Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: offset for background overlay
2020-04-11 17:41 ` Hans Hagen
@ 2020-04-11 18:11 ` Wolfgang Schuster
2020-04-11 21:59 ` mf
0 siblings, 1 reply; 7+ messages in thread
From: Wolfgang Schuster @ 2020-04-11 18:11 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hans Hagen schrieb am 11.04.2020 um 19:41:
> On 4/11/2020 4:15 PM, mf wrote:
>> Hello list,
>> this MWE is a simplified version of a real case:
>>
>> \startuseMPgraphic{cell:triangle}
>> path p ; p := unittriangle rotated 90 xscaled 2.5 OverlayWidth
>> yscaled 2.5 OverlayHeight ;
>> draw p withcolor red ;
>> \stopuseMPgraphic
>> \defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
>> \starttext
>> \bTABLE[frame=off]
>> \bTR
>> \bTD[nx=2,background=triangle,align=middle] \dontleavehmode
>> a\crlf text \eTD
>> \eTR
>> \bTR[toffset=1mm]
>> \bTD left \eTD
>> \bTD right \eTD
>> \eTR
>> \eTABLE
>> \stoptext
> here's a very ugly solution
>
> \startuseMPgraphic{cell:triangle}
> fill llcorner OverlayBox
> -- lrcorner OverlayBox
> -- (center bottomboundary OverlayBox shifted
> (0,\MPy{foo:2}-\MPh{foo:2}+\MPd{foo:2}-\MPy{foo:1}))
> -- cycle
> withcolor red ;
> setbounds currentpicture to OverlayBox ;
> \stopuseMPgraphic
>
> \defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
>
> \starttext
>
> \bTABLE[frame=off]
> \bTR
>
> \bTD[nx=2,align=middle,height=0pt,background=triangle]\xypos{foo:1}\eTD
> \eTR
> \bTR
> \bTD[nx=2,align=middle] \dontleavehmode a\crlf text \eTD
> \eTR
> \bTR[toffset=1mm]
> \bTD \hpos{foo:2}{\strut} left \eTD
> \bTD right \eTD
> \eTR
> \eTABLE
>
> \stoptext
>
> it is probably possible to get some info otherwise (more efficient) if
> really needed (if we add some helpers)
Simpler, put the table in a frame.
\startuseMPgraphic{cell:triangle}
draw llcorner OverlayBox
-- lrcorner OverlayBox
-- center topboundary OverlayBox
-- cycle
withcolor red ;
\stopuseMPgraphic
\defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
\starttext
\startframed[frame=off,offset=1ex,loffset=2ex,roffset=2ex,toffset=2ex,background=triangle]
\bTABLE[frame=off]
\bTR
\bTD[nx=2,align=middle] a\crlf text \eTD
\eTR
\bTR[toffset=1mm]
\bTD left \eTD
\bTD right \eTD
\eTR
\eTABLE
\stopframed
\stoptext
Wolfgang
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: offset for background overlay
2020-04-11 18:11 ` Wolfgang Schuster
@ 2020-04-11 21:59 ` mf
2020-04-12 5:53 ` Wolfgang Schuster
0 siblings, 1 reply; 7+ messages in thread
From: mf @ 2020-04-11 21:59 UTC (permalink / raw)
To: Wolfgang Schuster, mailing list for ConTeXt users
Thanks Hans and Wolfgang.
@Wolfgang: your solution is clearer, but unfortunately it works only for
this MWE. In the real case the triangle extends over 2 rows, but the
table has more than 2 rows.
I tried grouping the first two rows in a
\bTABLEbody[background=triangle], but it doesn't work.
@both: \setupoverlay[hoffset=...,voffset=...]?
\setupframed[backgroundhoffset=...,backgroundvoffset=...] (\bTD inherits
from \framed)?
Or maybe a method in MP to set the bounding box of the resulting overlay?
\setupframed has already a backgroundoffset option, whose value can be:
- a DIMENSION (an offset that is both horizontal and vertical)
- a "frame": what does it mean? (I looked into pack-rul.mkiv, with no
results)
Massi
Il 11/04/20 20:11, Wolfgang Schuster ha scritto:
> Hans Hagen schrieb am 11.04.2020 um 19:41:
>> On 4/11/2020 4:15 PM, mf wrote:
>>> Hello list,
>>> this MWE is a simplified version of a real case:
>>>
>>> \startuseMPgraphic{cell:triangle}
>>> path p ; p := unittriangle rotated 90 xscaled 2.5 OverlayWidth
>>> yscaled 2.5 OverlayHeight ;
>>> draw p withcolor red ;
>>> \stopuseMPgraphic
>>> \defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
>>> \starttext
>>> \bTABLE[frame=off]
>>> \bTR
>>> \bTD[nx=2,background=triangle,align=middle] \dontleavehmode
>>> a\crlf text \eTD
>>> \eTR
>>> \bTR[toffset=1mm]
>>> \bTD left \eTD
>>> \bTD right \eTD
>>> \eTR
>>> \eTABLE
>>> \stoptext
>> here's a very ugly solution
>>
>> \startuseMPgraphic{cell:triangle}
>> fill llcorner OverlayBox
>> -- lrcorner OverlayBox
>> -- (center bottomboundary OverlayBox shifted
>> (0,\MPy{foo:2}-\MPh{foo:2}+\MPd{foo:2}-\MPy{foo:1}))
>> -- cycle
>> withcolor red ;
>> setbounds currentpicture to OverlayBox ;
>> \stopuseMPgraphic
>>
>> \defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
>>
>> \starttext
>>
>> \bTABLE[frame=off]
>> \bTR
>> \bTD[nx=2,align=middle,height=0pt,background=triangle]\xypos{foo:1}\eTD
>> \eTR
>> \bTR
>> \bTD[nx=2,align=middle] \dontleavehmode a\crlf text \eTD
>> \eTR
>> \bTR[toffset=1mm]
>> \bTD \hpos{foo:2}{\strut} left \eTD
>> \bTD right \eTD
>> \eTR
>> \eTABLE
>>
>> \stoptext
>>
>> it is probably possible to get some info otherwise (more efficient) if
>> really needed (if we add some helpers)
>
> Simpler, put the table in a frame.
>
> \startuseMPgraphic{cell:triangle}
> draw llcorner OverlayBox
> -- lrcorner OverlayBox
> -- center topboundary OverlayBox
> -- cycle
> withcolor red ;
> \stopuseMPgraphic
>
> \defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
>
> \starttext
>
> \startframed[frame=off,offset=1ex,loffset=2ex,roffset=2ex,toffset=2ex,background=triangle]
>
> \bTABLE[frame=off]
> \bTR
> \bTD[nx=2,align=middle] a\crlf text \eTD
> \eTR
> \bTR[toffset=1mm]
> \bTD left \eTD
> \bTD right \eTD
> \eTR
> \eTABLE
> \stopframed
>
> \stoptext
>
> Wolfgang
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: offset for background overlay
2020-04-11 21:59 ` mf
@ 2020-04-12 5:53 ` Wolfgang Schuster
2020-04-13 15:21 ` mf
0 siblings, 1 reply; 7+ messages in thread
From: Wolfgang Schuster @ 2020-04-12 5:53 UTC (permalink / raw)
To: mf; +Cc: mailing list for ConTeXt users
mf schrieb am 11.04.2020 um 23:59:
> Thanks Hans and Wolfgang.
>
> @Wolfgang: your solution is clearer, but unfortunately it works only for
> this MWE. In the real case the triangle extends over 2 rows, but the
> table has more than 2 rows.
> I tried grouping the first two rows in a
> \bTABLEbody[background=triangle], but it doesn't work.
How about nested tables:
\starttext
\bTABLE[width=1cm,height=1cm]
\bTR
\bTD A \eTD
\bTD B \eTD
\bTD C \eTD
\bTD E \eTD
\eTR
\bTR
\bTD E \eTD
\bTD[nc=2,nr=2,strut=no,align={middle,lohi}] {\bTABLE
\bTR \bTD[nc=2] X \eTD \eTR
\bTR \bTD Y \eTD \bTD Z \eTD \eTR
\eTABLE} \eTD
\bTD H \eTD
\eTR
\bTR
\bTD I \eTD
\bTD L \eTD
\eTR
\bTR
\bTD M \eTD
\bTD N \eTD
\bTD O \eTD
\bTD P \eTD
\eTR
\eTABLE
\stoptext
> @both: \setupoverlay[hoffset=...,voffset=...]?
> \setupframed[backgroundhoffset=...,backgroundvoffset=...] (\bTD inherits
> from \framed)?
> Or maybe a method in MP to set the bounding box of the resulting overlay?
setbounds in combination with leftenlarged, topenlarged etc.
> \setupframed has already a backgroundoffset option, whose value can be:
>
> - a DIMENSION (an offset that is both horizontal and vertical)
>
> - a "frame": what does it mean? (I looked into pack-rul.mkiv, with no
> results)
ConTeXt uses the value from the frameoffset key for backgroundoffset.
\startuseMPgraphic{frameborder}
draw OverlayBox withcolor blue ;
\stopuseMPgraphic
\defineoverlay[frameborder][\useMPgraphic{frameborder}]
\setupheader[state=high]
\setupfooter[state=high]
\starttext
\setupframed
[width=4cm,
height=4cm,
offset=1cm]
\framed{}
\framed[frame=off,background=frameborder]{}
\framed[frameoffset=-5mm]{}
\framed[frameoffset=-5mm,frame=off,background=frameborder]{}
\framed[backgroundoffset=-5mm,frame=off,background=frameborder]{}
\framed[frameoffset=-5mm,backgroundoffset=frame,frame=off,background=frameborder]{}
\stoptext
Wolfgang
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: offset for background overlay
2020-04-12 5:53 ` Wolfgang Schuster
@ 2020-04-13 15:21 ` mf
2020-04-13 16:14 ` Wolfgang Schuster
0 siblings, 1 reply; 7+ messages in thread
From: mf @ 2020-04-13 15:21 UTC (permalink / raw)
To: Wolfgang Schuster; +Cc: mailing list for ConTeXt users
>> Or maybe a method in MP to set the bounding box of the resulting overlay?
>
> setbounds in combination with leftenlarged, topenlarged etc.
>
Thanks Wolfgang, this is the kind of solution I was looking for:
\startuseMPgraphic{cell:triangle}
path p ; p := unittriangle rotated 90 xscaled 2.5 OverlayWidth
yscaled 2.5 OverlayHeight ;
draw p withcolor red ;
setbounds currentpicture to p topenlarged 6mm ;
\stopuseMPgraphic
\defineoverlay[triangle][{\uniqueMPgraphic{cell:triangle}}]
\starttext
\bTABLE[frame=off]
\bTR
\bTD[nx=2,align=middle,background=triangle] \dontleavehmode a\crlf
text \eTD
\eTR
\bTR[toffset=1mm]
\bTD left \eTD
\bTD right \eTD
\eTR
\bTR
\bTD another \eTD
\bTD row \eTD
\eTR
\eTABLE
\stoptext
Thanks also for the explanation of backgroundoffset: it's an offset
relative only to the background, and it moves in the opposite direction
of the content offset of \framed.
Looks like \framed[...,offset=VALUE,backgroundoffset=frame,...] is
equivalent to \framed[...,offset=VALUE,backgroundoffset=-VALUE,...].
I tried to add something to the WIKI to show how it works, but the
previews I got were not consistent with what I'm obtaining on my PC
(with LMTX and "context --luatex"), so I gave up.
Massi
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: offset for background overlay
2020-04-13 15:21 ` mf
@ 2020-04-13 16:14 ` Wolfgang Schuster
0 siblings, 0 replies; 7+ messages in thread
From: Wolfgang Schuster @ 2020-04-13 16:14 UTC (permalink / raw)
To: mf; +Cc: mailing list for ConTeXt users
mf schrieb am 13.04.2020 um 17:21:
> Thanks also for the explanation of backgroundoffset: it's an offset
> relative only to the background, and it moves in the opposite direction
> of the content offset of \framed.
>
> Looks like \framed[...,offset=VALUE,backgroundoffset=frame,...] is
> equivalent to \framed[...,offset=VALUE,backgroundoffset=-VALUE,...].
>
> I tried to add something to the WIKI to show how it works, but the
> previews I got were not consistent with what I'm obtaining on my PC
> (with LMTX and "context --luatex"), so I gave up.
When you use "backgroundoffset=frame" you have to change the value for
"frameoffset" to get a result because "backgroundoffset" uses now the
"frameoffset" value.
Wolfgang
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___________________________________________________________________________________
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2020-04-11 14:15 offset for background overlay mf
2020-04-11 17:41 ` Hans Hagen
2020-04-11 18:11 ` Wolfgang Schuster
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2020-04-12 5:53 ` Wolfgang Schuster
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