[NTG-context] colors for links

[Pablo Rodriguez]

Hi Hans,

I have the following source, which tries to resemble three kinds of links:

\setupinteraction[state=start, style=, focus=standard]

\def\inone#1{%
  \start\setupinteraction[color=darkgreen]%
  \enabledirectives[references.border=darkgreen]%
  \goto{#1}[url(#1)]\stop}
\def\intwo#1{%
  \start\setupinteraction[color=darkred]%
  \enabledirectives[references.border=darkred]%
  \goto{#1}[url(#1)]\stop}
\def\inthree#1{%
  \start\setupinteraction[color=darkblue]%
  \enabledirectives[references.border=darkblue]%
  \goto{#1}[url(#1)]\stop}

\starttext
\startTEXpage[offset=1dk, align=middle]
\inone{one}\blank
\intwo{two}\blank
\inthree{three}\blank
\stopTEXpage
\chapter[one]{First chapter}
\chapter[two]{Second chapter}
\chapter[three]{Second chapter}
\stoptext

I see that the directive for link borders only allows one color for
links per document.

In my real-world documents, I need to make three different border links:
for destinations inside the document (/GoTo), for destinations in other
documents (/GoToR or /GoToE) and for external destinations (/URI).

With the current document I write now, I have over a hundred links in
twenty pages. Being able to visually distinguish each link helps
interaction with the document (reading or even writing it).

Would it be possible that \setupinteraction could have a bordercolor
key, such as the color one?

Many thanks for your help,

Pablo
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / 
https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive  : https://github.com/contextgarden/context
wiki : https://wiki.contextgarden.net
___

Re: [NTG-context] colors and contours in luametafun

[Hans Hagen via ntg-context]

On 6/20/2022 6:29 PM, Jacob Kauffmann via ntg-context wrote:

Dear list,


Am 01.09.2021 um 09:54 schrieb Jacob Kauffmann via ntg-context 
:
- color by value in lmt_surface
We want to show a surface plot of a function where the color indicates the 
function value (instead, or in addition to a light source).
The easiest would be to have variable cf for the brightness factor (as it is), 
and in addition variables such as zt, minz, maxz, akin to the color formatter 
for lmt_contour.
This becomes handy when colors are to be aligned with function values (e.g. 
negative = blue, zero = white, positive = red, see MWE attached).


I managed to achieve this by tweaking f_color and mp.lmt_surface_do in 
mlib-cnt.lmt in
ConTeXt  ver: 2022.05.11 11:36 LMTX  fmt: 2022.6.20
a bit.
Please find the diff and a MWE attached.


in next version (next time just send me the file, easier than a diff)


Cheers,
Jacob Kauffmann

--- context/tex/texmf-context/tex/context/base/mkxl/mlib-cnt.lmt   2022-06-20 
18:11:51.0 +0200
+++ mlib-cnt.lmt2022-06-20 18:26:22.0 +0200
@@ -1839,7 +1839,29 @@

  local f_color = formatters [ [[
  local math = math
-return function(f)
+local min  = math.min
+local max  = math.max
+local abs  = math.abs
+local minz = %s
+local maxz = %s
+
+local color_value = 0
+local color_step  = mp.lmt_color_functions.step
+local color_shade = mp.lmt_color_functions.shade
+
+local function step(...)
+return color_step(color_value,n,...)
+end
+local function shade(...)
+return color_shade(color_value,n,...)
+end
+-- local function lin(l)
+-- return l/n
+-- end
+%s
+return function(z, f)
+function_value = z
+brightness_factor = f
  return %s
  end
  ]] ]
@@ -1898,7 +1920,7 @@
  local dy   = (ymax - ymin) / ny
  local xt   = xmin
  --
-local minf, maxf
+local minf, maxf, minz, maxz
  --
  -- similar as contours but no data loop here
  --
@@ -1908,12 +1930,6 @@
  return false -- fatal error
  end
  --
-local ccode = load(f_color(colorcode))
-local color = type(ccode) == "function" and ccode()
-if type(color) ~= "function" then
-return false -- fatal error
-end
---
  for i=0,nx do
  local yt = ymin
  for j=0,ny do
@@ -1946,7 +1962,16 @@
  maxf = fac
  end
  --
-data[i][j] = { x, y, fac }
+if not minz then
+   minz = z
+   maxz = z
+elseif z < minz then
+   minz = z
+elseif z > maxz then
+   maxz = z
+end
+--
+data[i][j] = { x, y, fac, z }
  --
  yt = yt + dy
  end
@@ -1957,6 +1982,16 @@
  local range   = maxf - minf
  local cl  = linecolor or 1
  local enforce = attributes.colors.model == "cmyk"
+--
+-- local ccode = load(f_color(colorcode))
+report("minz, maxz is (%s,%s)",minz,maxz)
+report("colorcode is %s", colorcode)
+local ccode = load(f_color(minz, maxz, preamble, colorcode))
+local color = type(ccode) == "function" and ccode()
+if type(color) ~= "function" then
+return false -- fatal error
+end
+--
  for i=0,nx-1 do
  for j=0,ny-1 do
  -- points
@@ -1985,12 +2020,13 @@
  local z32 = z3[2]
  local z41 = z4[1]
  local z42 = z4[2]
+local zout = z1[4]
   -- if lines then
   -- -- fill first and draw then, previous shapes can be covered
   -- else
   -- -- fill and draw in one go to prevent artifacts
   -- end
-local cr, cg, cb = color(cf)
+local cr, cg, cb = color(zout, cf)
  if not cr then cr = 0 end
  if not cg then cg = 0 end
  if not cb then cb = 0 end




___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___



--

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
   tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 

Re: [NTG-context] colors and contours in luametafun

[Jacob Kauffmann via ntg-context]

Dear list,

> Am 01.09.2021 um 09:54 schrieb Jacob Kauffmann via ntg-context 
> :
> - color by value in lmt_surface
> We want to show a surface plot of a function where the color indicates the 
> function value (instead, or in addition to a light source).
> The easiest would be to have variable cf for the brightness factor (as it 
> is), and in addition variables such as zt, minz, maxz, akin to the color 
> formatter for lmt_contour.
> This becomes handy when colors are to be aligned with function values (e.g. 
> negative = blue, zero = white, positive = red, see MWE attached).

I managed to achieve this by tweaking f_color and mp.lmt_surface_do in 
mlib-cnt.lmt in
ConTeXt  ver: 2022.05.11 11:36 LMTX  fmt: 2022.6.20
a bit.
Please find the diff and a MWE attached.

Cheers,
Jacob Kauffmann

--- context/tex/texmf-context/tex/context/base/mkxl/mlib-cnt.lmt   2022-06-20 
18:11:51.0 +0200
+++ mlib-cnt.lmt2022-06-20 18:26:22.0 +0200
@@ -1839,7 +1839,29 @@

 local f_color = formatters [ [[
 local math = math
-return function(f)
+local min  = math.min
+local max  = math.max
+local abs  = math.abs
+local minz = %s
+local maxz = %s
+
+local color_value = 0
+local color_step  = mp.lmt_color_functions.step
+local color_shade = mp.lmt_color_functions.shade
+
+local function step(...)
+return color_step(color_value,n,...)
+end
+local function shade(...)
+return color_shade(color_value,n,...)
+end
+-- local function lin(l)
+-- return l/n
+-- end
+%s
+return function(z, f)
+function_value = z
+brightness_factor = f
 return %s
 end
 ]] ]
@@ -1898,7 +1920,7 @@
 local dy   = (ymax - ymin) / ny
 local xt   = xmin
 --
-local minf, maxf
+local minf, maxf, minz, maxz
 --
 -- similar as contours but no data loop here
 --
@@ -1908,12 +1930,6 @@
 return false -- fatal error
 end
 --
-local ccode = load(f_color(colorcode))
-local color = type(ccode) == "function" and ccode()
-if type(color) ~= "function" then
-return false -- fatal error
-end
---
 for i=0,nx do
 local yt = ymin
 for j=0,ny do
@@ -1946,7 +1962,16 @@
 maxf = fac
 end
 --
-data[i][j] = { x, y, fac }
+if not minz then
+   minz = z
+   maxz = z
+elseif z < minz then
+   minz = z
+elseif z > maxz then
+   maxz = z
+end
+--
+data[i][j] = { x, y, fac, z }
 --
 yt = yt + dy
 end
@@ -1957,6 +1982,16 @@
 local range   = maxf - minf
 local cl  = linecolor or 1
 local enforce = attributes.colors.model == "cmyk"
+--
+-- local ccode = load(f_color(colorcode))
+report("minz, maxz is (%s,%s)",minz,maxz)
+report("colorcode is %s", colorcode)
+local ccode = load(f_color(minz, maxz, preamble, colorcode))
+local color = type(ccode) == "function" and ccode()
+if type(color) ~= "function" then
+return false -- fatal error
+end
+--
 for i=0,nx-1 do
 for j=0,ny-1 do
 -- points
@@ -1985,12 +2020,13 @@
 local z32 = z3[2]
 local z41 = z4[1]
 local z42 = z4[2]
+local zout = z1[4]
  -- if lines then
  -- -- fill first and draw then, previous shapes can be covered
  -- else
  -- -- fill and draw in one go to prevent artifacts
  -- end
-local cr, cg, cb = color(cf)
+local cr, cg, cb = color(zout, cf)
 if not cr then cr = 0 end
 if not cg then cg = 0 end
 if not cb then cb = 0 end



colors_and_surface_in_luametafun.pdf
Description: Adobe PDF document



colors_and_surface_in_luametafun.tex
Description: Binary data


signature.asc
Description: Message signed with OpenPGP
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___

[NTG-context] colors and contours in luametafun

[Jacob Kauffmann via ntg-context]

Dear list,

I am a huge fan of the new metafun interface.
Hans asked for luametafun requests, so here are a few.

 - color by value in lmt_surface
We want to show a surface plot of a function where the color indicates the 
function value (instead, or in addition to a light source).
The easiest would be to have variable cf for the brightness factor (as it is), 
and in addition variables such as zt, minz, maxz, akin to the color formatter 
for lmt_contour.
This becomes handy when colors are to be aligned with function values (e.g. 
negative = blue, zero = white, positive = red, see MWE attached).

 - controlling line levels in lmt_contour
It would be convenient if certain levels could be set by the user. E.g. to make 
sure the zero level contour line is included.
The user interface could potentially take a list, levels = { -1, -.5, 0, .5, 1 
}, of contour level lines. See MWE attached.
From my understanding marching squares can do that. A possible reference 
implementation could be QuadContourGenerator [1] in matplotlib, a bit of 
description can be found in [2].

 - colormaps
Contour plots often use rather complex colormaps, such as jet, rainbow or 
veridis. They are optimized for perceptual resolution, color blindness, 
screen/print or certain use cases.
The functionality is already there, but from a user's perspective, it would be 
much easier if some of these were provided by the interface.
The interface could be color = "colormap('jet')(l/n)". Indeed, these are useful 
in other use cases as well, such as bar charts, surface plots or shades.
One rudimentary example is in the attached file.

 - number of levels in lmt_contour (potential bug)
The number of levels is different from the user's input. Depending on the 
output range it can be lower or higher (see MWE attached).

Cheers,
Jacob Kauffmann

[1] 
https://github.com/matplotlib/matplotlib/blob/96ff1146ad053c5c7481efd9de039c879a595968/src/_contour.cpp
[2] 
https://github.com/matplotlib/matplotlib/blob/96ff1146ad053c5c7481efd9de039c879a595968/src/_contour.h



colors_and_contours_in_luametafun.tex
Description: Binary data


colors_and_contours_in_luametafun.pdf
Description: Adobe PDF document
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors in lmt_surface and luametafun

[Hans Hagen]

On 4/17/2020 3:33 PM, Otared Kavian wrote:

Hi Hans,

On page 36 of luametafun.pdf there is the following example of using 
lmt_surface:

\startMPcode{doublefun}
draw lmt_surface [
preamble  = "local sin, cos = math.sin, math.cos",
code = "sin(x*x) - cos(y*y)",
color = "f, f/2, 1-f",
color = "f, f, 0",
xstep = .02,
ystep = .02,
xvector = {-0.4, -0.4},
height = 10cm,
lines = true,
] xsized .TextWidth ;
\stopMPcode

What is the meaning of « f » in « color = "f, f/5, 1-f" »?
Is it possible to specify other colors and how can it be done?

f = fraction

you can write some function yourself

\starttext

\startMPcode{doublefun}
draw lmt_surface [
preamble = "local sin, cos = math.sin, math.cos",
code = "sin(x*x) - cos(y*y)",
color= "f, f, 0",
xstep= .02,
ystep= .02,
xvector  = {-0.4, -0.4},
height   = 5cm,
lines= true,
] ysized (TextHeight/4) ;
\stopMPcode

\startluacode
function MyColor(f) return f/2, f/3, .5 end
\stopluacode

\startMPcode{doublefun}
draw lmt_surface [
preamble = "local sin, cos = math.sin, math.cos",
code = "sin(x*x) - cos(y*y)",
color= "MyColor(f)",
xstep= .02,
ystep= .02,
xvector  = {-0.4, -0.4},
height   = 5cm,
lines= true,
] ysized (TextHeight/4) ;
\stopMPcode

\startMPcode{doublefun}
draw lmt_surface [
preamble = "local sin, cos = math.sin, math.cos " &
   "function MyColor(f) return 0, f/3, .5 end",
code = "sin(x*x) - cos(y*y)",
color= "MyColor(f)",
xstep= .02,
ystep= .02,
xvector  = {-0.4, -0.4},
height   = 5cm,
lines= true,
] ysized (TextHeight/4) ;
\stopMPcode



-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
   tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___

[NTG-context] Colors in lmt_surface and luametafun

[Otared Kavian]

Hi Hans,

On page 36 of luametafun.pdf there is the following example of using 
lmt_surface:

\startMPcode{doublefun}
draw lmt_surface [
preamble  = "local sin, cos = math.sin, math.cos",
code = "sin(x*x) - cos(y*y)",
color = "f, f/2, 1-f",
color = "f, f, 0",
xstep = .02,
ystep = .02,
xvector = {-0.4, -0.4},
height = 10cm,
lines = true,
] xsized .TextWidth ;
\stopMPcode

What is the meaning of « f » in « color = "f, f/5, 1-f" »?
Is it possible to specify other colors and how can it be done?

Thanks for your attention: Otared 
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in MetaPost

[Hans Hagen]

On 9/11/2019 2:18 PM, Henning Hraban Ramm wrote:

Am 2019-09-11 um 13:46 schrieb Henning Hraban Ramm :

\definecolor[VerlaufVon][c=75,m=5,y=95,k=60]
\definecolor[VerlaufNach][c=88,m=95,y=5,k=60]


Of course I need values between 0 and 1.
Sorry for the noise.
I think I’m too tired...

there is an alternative interface on top of the existing one (coming) ...

% maybe handy:

definecolor [ name = "MyColor3", r = 0.22, g = 0.44, b = 0.66 ] ;
definecolor [ name = "MyColor4", r = 0.66, g = 0.44, b = 0.22 ] ;

% parameter driven:

draw lmt_shade [
path  = fullcircle scaled 4cm,
direction = "right",
domain= { 0, 2 },
colors= { "MyColor3", "MyColor4" },
] ;

but tweaking shades will never be easy

Hans

(working in the metafun xl manual, more soon)

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
   tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in MetaPost

[Henning Hraban Ramm]

Am 2019-09-11 um 13:46 schrieb Henning Hraban Ramm :
> \definecolor[VerlaufVon][c=75,m=5,y=95,k=60]
> \definecolor[VerlaufNach][c=88,m=95,y=5,k=60]

Of course I need values between 0 and 1.
Sorry for the noise.
I think I’m too tired...


Greetlings, Hraban
---
https://www.fiee.net
http://wiki.contextgarden.net
https://www.dreiviertelhaus.de
GPG Key ID 1C9B22FD

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___

[NTG-context] colors in MetaPost

[Henning Hraban Ramm]

Hi,
I’m trying to get a linear shade in the background of my presentation.
But it seems like MetaPost can’t handle my self-defined colors:


\definecolor[VerlaufVon][c=75,m=5,y=95,k=60]
\definecolor[VerlaufNach][c=88,m=95,y=5,k=60]

\startuniqueMPgraphic{Verlauf}
% old method, also doesn’t work
%  path p ;
%  p := unitsquare xscaled \overlaywidth yscaled \overlayheight ;
%  linear_shade(p,6,\MPcolor{VerlaufVon},\MPcolor{VerlaufNach}) ;

fill fullsquare xyscaled (\overlaywidth,\overlayheight)
  withshademethod "linear"
  withshadevector (0.5,2.5)
  %withshadedirection shadedup
  withshadecolors ("VerlaufVon", "VerlaufNach")
;
\stopuniqueMPgraphic

\defineoverlay[verlaufen][\useMPgraphic{Verlauf}]

\setupbackgrounds[paper][background={verlaufen}]

\starttext
\strut
\stoptext


The background consists of a blue and a green area instead of a shade. While 
testing I sometimes got a few more stripes in the top and bottom area, can’t 
reproduce any more.

I also tried RGB and hex (HTML) definitions. Predefined colors work.
According to the MetaFun manual, either \MPcolor{name} or just "name" should 
work.
What’s wrong?


Greetlings, Hraban
---
https://www.fiee.net
http://wiki.contextgarden.net
https://www.dreiviertelhaus.de
GPG Key ID 1C9B22FD

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___

[NTG-context] Colors not showing inside metapost after \showcolor

[Bou Salim]

I have texlive 2016 on windows OS, I use context mkiv.
with context -- version   I have: current version: 2016-05-17
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors not showing inside metapost after \showcolor

[Hans Hagen]

On 7/23/2016 9:35 AM, Schmitz Thomas A. wrote:



On 23 Jul 2016, at 09:24, Bou Salim  wrote:

Hi
I have this problem to show colors properly. I have defined color "myred",  but 
after \showcolor command  colors inside metapost can't be displayed.


Your example shows the correct colors here. Which version are you using? mkii 
or mkiv?


we can even say this now:

fill fullcircle scaled 10mm withcolor "myred";

to refer to colors at the context end

Hans

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
   tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors not showing inside metapost after \showcolor

[Schmitz Thomas A.]

> On 23 Jul 2016, at 09:24, Bou Salim  wrote:
> 
> Hi 
> I have this problem to show colors properly. I have defined color "myred",  
> but after \showcolor command  colors inside metapost can't be displayed.

Your example shows the correct colors here. Which version are you using? mkii 
or mkiv?

Thomas
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

[NTG-context] Colors not showing inside metapost after \showcolor

[Bou Salim]

Hi
I have this problem to show colors properly. I have defined color "myred",
 but after \showcolor command  colors inside metapost can't be displayed.

Thanks

\starttext


\definecolor[myred] [r=.8]

 \showcolor


\startuseMPgraphic{test}

  fill fullcircle scaled 10mm withcolor \MPcolor{myred};

\stopuseMPgraphic


\midaligned{\useMPgraphic{test}}



\stoptext
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors: printing vs. on screen

[Erik Margraf]

Thanks! I'll go for the calibration and some trials in CMYK colors for
printing.

kind regards
Erik

2011/6/19 Henning Hraban Ramm hra...@fiee.net

 Yes, because your monitor uses RGB and your printer uses CMYK. The
 conversion between thetwo is not too complicated, but actually getting the
 same output from the two is hard. RGB is an additive model, CMYK is
 subtractive (read about the different models, wikipedia will do). The color
 impression you get by looking at the output is generated in completely
 different ways.


 Most office printers cope well with RGB (sRGB) colors, a lot of inkjet
 printers even better than with CMYK colors, because they're optimized for
 home dummy use.

 But (as Christoph pointed out) your printer can be as great as it goes,
 you'll never get a similar color impression if your monitor's set to some
 extreme setting - and most monitors that I saw outside of the graphical
 branch are set to nonsense settings, e.g. max contrast.

 Greetlings from Lake Constance!
 Hraban
 ---
 http://www.fiee.net/texnique/
 http://wiki.contextgarden.net
 https://www.cacert.org (I'm an assurer)


 __**__**
 ___
 If your question is of interest to others as well, please add an entry to
 the Wiki!

 maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/**
 listinfo/ntg-context http://www.ntg.nl/mailman/listinfo/ntg-context
 webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
 archive  : 
 http://foundry.supelec.fr/**projects/contextrev/http://foundry.supelec.fr/projects/contextrev/
 wiki : http://contextgarden.net
 __**__**
 ___

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

[NTG-context] Colors: printing vs. on screen

[Erik Margraf]

Dear List,

I defined the following color for one of my
documents: \definecolor[P][r=0.64,g=0.22,b=0.27]
When I printed this document on a probably typical office laser printer (a
Canon iRC), the
colors didn't match. (not even close and I didn't like the printed
color) This is probably no real
surprise, but can anybody provide some insight or hints to information on
these matters to me:

 -- Are spot colors the thing to use to get a grip on these matters?
 -- Is this generally only a matter of color spaces and transformations
between them?  or ...
 -- Is this also dependent on specific printer models (eg. different office
laser printers)?
-- If yes, is there any source on information on the pecularities of
these printers?

kind regard and thanks

Erik
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors: printing vs. on screen

[Hans Hagen]

On 19-6-2011 1:53, Erik Margraf wrote:

Dear List,

I defined the following color for one of my
documents: \definecolor[P][r=0.64,g=0.22,b=0.27]
When I printed this document on a probably typical office laser printer (a
Canon iRC), the
colors didn't match. (not even close and I didn't like the printed
color) This is probably no real
surprise, but can anybody provide some insight or hints to information on
these matters to me:

  -- Are spot colors the thing to use to get a grip on these matters?


no, as your printer uses process colors (cmyk)


  -- Is this generally only a matter of color spaces and transformations
between them?  or ...


indeed, often printer drivers apply some paper properties as well


  -- Is this also dependent on specific printer models (eg. different office
laser printers)?


yes, toner vs ink, kinds of paper, quality of renderer etc


 -- If yes, is there any source on information on the pecularities of
these printers?


specifying in cmyk might help

Hans

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors: printing vs. on screen

[Christoph Redecker]

  -- Are spot colors the thing to use to get a grip on these matters?


No, because spot colors are used to extend the printable range by colors 
not available in cmyk. You might be able to show such a color on your 
monitor, but not print it.



  -- Is this generally only a matter of color spaces and
transformations between them?


Yes, because your monitor uses RGB and your printer uses CMYK. The 
conversion between thetwo is not too complicated, but actually getting 
the same output from the two is hard. RGB is an additive model, CMYK is 
subtractive (read about the different models, wikipedia will do). The 
color impression you get by looking at the output is generated in 
completely different ways.


  or ...

  -- Is this also dependent on specific printer models (eg. different
office laser printers)?
 -- If yes, is there any source on information on the pecularities
of these printers?


Each printer will print slightly different, that's the nature of things. 
Your best bet is to calibrate your monitor (also, search a bit on the 
web for ways to do this). Turn a few of your monitors knobs and see how 
the colors change - now imagine what variables come into play between 
your impression of the color shown by your monitor, the actual data, and 
the impression you get from your printer's output!


You can also try specifying a color in CMYK and see if the output changes.

Regards

Christoph
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors: printing vs. on screen

[Henning Hraban Ramm]

Yes, because your monitor uses RGB and your printer uses CMYK. The  
conversion between thetwo is not too complicated, but actually  
getting the same output from the two is hard. RGB is an additive  
model, CMYK is subtractive (read about the different models,  
wikipedia will do). The color impression you get by looking at the  
output is generated in completely different ways.


Most office printers cope well with RGB (sRGB) colors, a lot of inkjet  
printers even better than with CMYK colors, because they're optimized  
for home dummy use.


But (as Christoph pointed out) your printer can be as great as it  
goes, you'll never get a similar color impression if your monitor's  
set to some extreme setting - and most monitors that I saw outside of  
the graphical branch are set to nonsense settings, e.g. max contrast.


Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Renaud AUBIN]

I need to not redefine.

Quoting Hans: maybe you should protect the color names as for instance
redefining darkred might not be the intention

In fact, I just need to find unique names for my colors to not overload
the existing ones…

Renaud

 I still don't understand. Where do you need to redefine darkred?
 Cheers, Peter

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Peter Münster]

On Wed, Dec 08 2010, Renaud AUBIN wrote:

 In fact, I just need to find unique names for my colors to not overload
 the existing ones…

\doifcolorelse{new funny color}
  {Error: funny color already exists!}
  {\definecolor[new funny color][...]}

With \setupcolor[ema] or \setupcolor[ema, x11, xwi] there are already a lot of
predefined colors, so I don't think that you need new color definitions in the
module.

Peter

-- 
Contact information: http://pmrb.free.fr/contact/
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Renaud AUBIN]

Ok but then why did you define a specific color palet?

local function color_init()
color = 0
local def_colors = -- \setupcolor[ema] introduces new line...
\\definecolor [darkred]   [r=.545098] ..
\\definecolor [orchid][r=.854902,g=.439216,b=.839216] ..
\\definecolor [rosybrown] [r=.737255,g=.560784,b=.560784] ..
\\definecolor [forestgreen]   [r=.13,g=.545098,b=.13] ..
…

Renaud
 With \setupcolor[ema] or \setupcolor[ema, x11, xwi] there are already a lot of
 predefined colors, so I don't think that you need new color definitions in the
 module
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Peter Münster]

On Fri, Dec 10 2010, Renaud AUBIN wrote:

 Ok but then why did you define a specific color palet?
 
 local function color_init()
 color = 0
 local def_colors = -- \setupcolor[ema] introduces new line...

The comment says it: \setupcolor[ema] introduces new line and that's annoying
when you do inline typing: bla bla \typeC{int main(){}} bla bla

The \definecolor[] lines (dirty workaround) were just copied from
colo-ema.tex.

The problem with the pretty-c.lua was, that color_init() was called at every
\typeC{} or \startC.

In your t-pretty-c.mkiv you can use \setupcolor[ema] without problems.

Cheers, Peter

-- 
Contact information: http://pmrb.free.fr/contact/
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Renaud AUBIN]

Done and committed on
http://gitorious.org/c-pretty-printer-module-for-context-mark-iv
 In your t-pretty-c.mkiv you can use \setupcolor[ema] without problems.
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

[NTG-context] colors for pretty-printing (was: Re: pret-c.lua - v-c.lua)

[Peter Münster]

On Mon, Dec 06 2010, Renaud AUBIN wrote:
 
 Concerning the color abstraction patch, one needs just to overload
 Ccomment, Cpreproc, Cstring, Ctype, Ckeyword, Cname and Cfuncnbound to
 use custom color scheme.

You don't need that. There is already a standard interface for color and style
configuration. Example:

\setupstartstop[CSnippetComment][color=blue]

So you can simplify t-pretty-c.mkiv:

\unprotect

\setupcolor[ema]

\definestartstop
[CSnippetName]
[\c!color=darkgoldenrod,
 \c!style=]

and so on...

Peter

-- 
Contact information: http://pmrb.free.fr/contact/
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing (was: Re: pret-c.lua - v-c.lua)

[Aditya Mahajan]

On Tue, 7 Dec 2010, Peter Münster wrote:


On Mon, Dec 06 2010, Renaud AUBIN wrote:


Concerning the color abstraction patch, one needs just to overload
Ccomment, Cpreproc, Cstring, Ctype, Ckeyword, Cname and Cfuncnbound to
use custom color scheme.


You don't need that. There is already a standard interface for color and style
configuration. Example:

\setupstartstop[CSnippetComment][color=blue]

So you can simplify t-pretty-c.mkiv:

\unprotect

\setupcolor[ema]

\definestartstop
   [CSnippetName]
   [\c!color=darkgoldenrod,
\c!style=]


I have not looked into the new verbatim code yet, but I have been thinking 
about a similar interface for a new module that uses external programs for 
syntax highlighting (sort of a superset of t-vim that will allow one to 
use other programs like pgyments, etc.).


Why are you using a C prefix for all environments? Isn't it better to use 
a syntax like this:


\startsetups[verbatim:C]
\definestartstop[SnippetName][color=...,style=...]
\definestartstop[string][color=...,style=...]

\stopsetups

and then pass setups=verbatim:C to an appropriate \setup... command. That 
will make it easy to share the same syntax highlighting between different 
languages.


Aditya
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Hans Hagen]

On 7-12-2010 2:29, Aditya Mahajan wrote:

On Tue, 7 Dec 2010, Peter Münster wrote:


On Mon, Dec 06 2010, Renaud AUBIN wrote:


Concerning the color abstraction patch, one needs just to overload
Ccomment, Cpreproc, Cstring, Ctype, Ckeyword, Cname and Cfuncnbound to
use custom color scheme.


You don't need that. There is already a standard interface for color
and style
configuration. Example:

\setupstartstop[CSnippetComment][color=blue]

So you can simplify t-pretty-c.mkiv:

\unprotect

\setupcolor[ema]

\definestartstop
[CSnippetName]
[\c!color=darkgoldenrod,
\c!style=]


I have not looked into the new verbatim code yet, but I have been
thinking about a similar interface for a new module that uses external
programs for syntax highlighting (sort of a superset of t-vim that will
allow one to use other programs like pgyments, etc.).


it all boils down hooking in a parser then:

\startluacode
local function parser(s)
  local s = somexternalthing(s)
  -- feedback s
end

visualizers.register(myparser, { parser = parser })
\stopluacode

\starttyping[option=myparser]

\stoptyping


Why are you using a C prefix for all environments? Isn't it better to
use a syntax like this:

\startsetups[verbatim:C]
\definestartstop[SnippetName][color=...,style=...]
\definestartstop[string][color=...,style=...]

\stopsetups

and then pass setups=verbatim:C to an appropriate \setup... command.
That will make it easy to share the same syntax highlighting between
different languages.


it's hard to come up with common names for characteristics for all those 
languages but at some point we can have a set predefined as default


btw, startstop can inherit (now):

\definestartstop
[MetapostSnippet]
[DefaultSnippet]

etc so there is no need for setups

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Aditya Mahajan]

On Tue, 7 Dec 2010, Hans Hagen wrote:


On 7-12-2010 2:29, Aditya Mahajan wrote:

On Tue, 7 Dec 2010, Peter Münster wrote:


On Mon, Dec 06 2010, Renaud AUBIN wrote:


Concerning the color abstraction patch, one needs just to overload
Ccomment, Cpreproc, Cstring, Ctype, Ckeyword, Cname and Cfuncnbound to
use custom color scheme.


You don't need that. There is already a standard interface for color
and style
configuration. Example:

\setupstartstop[CSnippetComment][color=blue]

So you can simplify t-pretty-c.mkiv:

\unprotect

\setupcolor[ema]

\definestartstop
[CSnippetName]
[\c!color=darkgoldenrod,
\c!style=]


I have not looked into the new verbatim code yet, but I have been
thinking about a similar interface for a new module that uses external
programs for syntax highlighting (sort of a superset of t-vim that will
allow one to use other programs like pgyments, etc.).


it all boils down hooking in a parser then:

\startluacode
local function parser(s)
 local s = somexternalthing(s)
 -- feedback s
end

visualizers.register(myparser, { parser = parser })
\stopluacode

\starttyping[option=myparser]

\stoptyping


Thanks for the explanation. But, I am not too keen to write parsers on my 
own when I can easily borrow existing ones.



Why are you using a C prefix for all environments? Isn't it better to
use a syntax like this:

\startsetups[verbatim:C]
\definestartstop[SnippetName][color=...,style=...]
\definestartstop[string][color=...,style=...]

\stopsetups

and then pass setups=verbatim:C to an appropriate \setup... command.
That will make it easy to share the same syntax highlighting between
different languages.


it's hard to come up with common names for characteristics for all those 
languages


But it does allow you to choose a color scheme for pretty printing. This 
is similar to how most editors choose color schemes.



but at some point we can have a set predefined as default

btw, startstop can inherit (now):

\definestartstop
   [MetapostSnippet]
   [DefaultSnippet]

etc so there is no need for setups


Setups have an advantage that one does not pollute the cs names. After 
all, \DefaultSnippet is not useful outside the pretty printing region.


An alternative could be to use a namsespace in define in all definitions, 
e.g.,


\definestartstop[visualizer::Snippet]

On a related note, does it make sense to add foregroundcolor and 
foregroupdstyle keys to \definebar? (Then, bars will be an appropriate and 
versatile mechanism to define syntax highlighting regions).


Aditya___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Hans Hagen]

On 7-12-2010 6:57, Aditya Mahajan wrote:


Thanks for the explanation. But, I am not too keen to write parsers on
my own when I can easily borrow existing ones.


sure, but a simple one can be:

function myparser(str)
  .. call your prog do do something with str and return the result
end


But it does allow you to choose a color scheme for pretty printing.
This is similar to how most editors choose color schemes.


sure, but my experience is that there are easily 10-15 different 
categories and naming them right is somewhat tricky



On a related note, does it make sense to add foregroundcolor and
foregroupdstyle keys to \definebar? (Then, bars will be an appropriate
and versatile mechanism to define syntax highlighting regions).


maybe

Hans

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Renaud AUBIN]

 You don't need that. There is already a standard interface for color and style
 configuration. Example:

 \setupstartstop[CSnippetComment][color=blue]

 So you can simplify t-pretty-c.mkiv:

 \unprotect

 \setupcolor[ema]

 \definestartstop
 [CSnippetName]
 [\c!color=darkgoldenrod,
  \c!style=]

 and so on...
   
OK, but anyway, I have to protect the color names (to prevent darkred
redefinition for example ;) )… So, I have made the choice to use
Csomething and it is not annoying as soon as the source color names are
kept…

Cheers

Renaud
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Peter Münster]

On Tue, Dec 07 2010, Renaud AUBIN wrote:
 
  So you can simplify t-pretty-c.mkiv:
 
  \unprotect
 
  \setupcolor[ema]
 
  \definestartstop
  [CSnippetName]
  [\c!color=darkgoldenrod,
   \c!style=]
 
  and so on...

 OK, but anyway, I have to protect the color names (to prevent darkred
 redefinition for example ;) )

I still don't understand. Where do you need to redefine darkred?
Cheers, Peter

-- 
Contact information: http://pmrb.free.fr/contact/
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors for pretty-printing

[Aditya Mahajan]

On Tue, Dec 7, 2010 at 2:30 PM, Hans Hagen pra...@wxs.nl wrote:
 On 7-12-2010 6:57, Aditya Mahajan wrote:

 Thanks for the explanation. But, I am not too keen to write parsers on
 my own when I can easily borrow existing ones.

 sure, but a simple one can be:

 function myparser(str)
  .. call your prog do do something with str and return the result
 end

OK. This sounds much easier than writing my own wrappers. I will try
to port the t-vim module to use the new code.

Aditya
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Mojca Miklavec]

On Sun, Feb 7, 2010 at 22:56, Wolfgang Schuster wrote:
 Am 07.02.10 07:24, schrieb Aditya Mahajan:

 while \color can only be used as

 \color[rgb]{...}.

 No. Both \color[rgb]{...} and {\color[rgb]...} are valid

 D’oh. I looked in the source and missed this but I wonder
 if this had been always the case because the manuals
 {and the wiki) mention only \color[name]{...}.

\colored is a rather recent command.

Mojca
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Hans Hagen]

On 7-2-2010 22:56, Wolfgang Schuster wrote:

Am 07.02.10 07:24, schrieb Aditya Mahajan:

while \color can only be used as

\color[rgb]{...}.

No. Both \color[rgb]{...} and {\color[rgb]...} are valid

D’oh. I looked in the source and missed this but I wonder
if this had been always the case because the manuals
{and the wiki) mention only \color[name]{...}.


all commands that use \groupedcommand have that property


-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Wolfgang Schuster]

Am 08.02.10 09:19, schrieb Mojca Miklavec:


D’oh. I looked in the source and missed this but I wonder
if this had been always the case because the manuals
(and the wiki) mention only \color[name]{...}.


\colored is a rather recent command.


I meant the manuals and wiki mention \color[name]{...}
but not the form {\color[...]...}.

Wolfgang
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Wolfgang Schuster]

Am 08.02.10 09:40, schrieb Hans Hagen:


D’oh. I looked in the source and missed this but I wonder
if this had been always the case because the manuals
{and the wiki) mention only \color[name]{...}.


all commands that use \groupedcommand have that property


But used \color always \groupedcommand or was this added later and the 
original definition was what is mentioned in the manual (\color[]{})?


Wolfgang
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Hans Hagen]

On 8-2-2010 9:55, Wolfgang Schuster wrote:

Am 08.02.10 09:40, schrieb Hans Hagen:


D’oh. I looked in the source and missed this but I wonder
if this had been always the case because the manuals
{and the wiki) mention only \color[name]{...}.


all commands that use \groupedcommand have that property


But used \color always \groupedcommand or was this added later and the
original definition was what is mentioned in the manual (\color[]{})?


it's a very old command so it might not have used groupedcommand in the past

also, at the time of manual writing no groupedcommand like things were 
there anyway


but .. there's another reason ...

\color{...} does not grab an argument but does some aftergroup trickery 
so it might not work in all cases


also in mkii we inject literals and we could end up with dangling revert 
color cases being nodes that could interfere somehow


mkiv is more robust

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Wolfgang Schuster]

Am 07.02.10 07:24, schrieb Aditya Mahajan:

while \color can only be used as

\color[rgb]{...}.

No. Both \color[rgb]{...} and {\color[rgb]...} are valid

D’oh. I looked in the source and missed this but I wonder
if this had been always the case because the manuals
{and the wiki) mention only \color[name]{...}.

Wolfgang

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Aditya Mahajan]

On Sat, 6 Feb 2010, Wolfgang Schuster wrote:


Am 05.02.10 15:49, schrieb Philipp Gesang:


Is there a difference (other than
syntax) between \colored[rgb] and the according \definecolor[name][rgb]
-- \color[name] commands?


No, \colored is \definecolor + \color except you can use it in the form

\colored[rgb]{...}

and

{\colored[rgb]...}

while \color can only be used as

\color[rgb]{...}.


No. Both \color[rgb]{...} and {\color[rgb]...} are valid

\definecolor[myred][r=0.65]

\starttext
{normal text \color[myred]{red text} normal text}

{normal text {\color[myred]red text} normal text}
\stoptext

Aditya
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Philipp Gesang]

Wolfgang, all,
On 2010-02-05 08:31:35, Wolfgang Schuster wrote:
 \colored[r=...,g=...,b=...]{...}
 or
 {\colored[r=...,g=...,b=...]...}
Thank you very much, I wikified it.  Is there a difference (other than
syntax) between \colored[rgb] and the according \definecolor[name][rgb]
-- \color[name] commands?

Philipp


pgpeYNdmcwSZk.pgp
Description: PGP signature
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Wolfgang Schuster]

Am 05.02.10 15:49, schrieb Philipp Gesang:


Is there a difference (other than
syntax) between \colored[rgb] and the according \definecolor[name][rgb]
-- \color[name] commands?


No, \colored is \definecolor + \color except you can use it in the form

\colored[rgb]{...}

and

{\colored[rgb]...}

while \color can only be used as

\color[rgb]{...}.

Wolfgang
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

[NTG-context] colors without \definecolor

[Philipp Gesang]

Hi all,


I understand that in order to use a color with \color[somecolor]{colored
text} I first have to \definecolor[somecolor][r=.4,g=0,b=1].  Currently
I'm trying to do automated colorizing with the help of some lua code and
I'd like to make up rgb vectors on the spot without having to
\definecolor them first, e.g. something like \color[r=.4,g=0,b=1]
{colored text}.  Is there a way to achieve this in mkiv?  (Right now I'm
assigning new rgb values to the same color name whenever the function
is called that concatenates the next \color[]{} statement.  This seems a
bit verbose and hacky to me.)

Thanks in advance,


Philipp
-- 
()  ascii ribbon campaign - against html e-mail
/\  www.asciiribbon.org   - against proprietary attachments


pgpmr9RKdR6JU.pgp
Description: PGP signature
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors without \definecolor

[Wolfgang Schuster]

Am 04.02.10 21:41, schrieb Philipp Gesang:

Hi all,


I understand that in order to use a color with \color[somecolor]{colored
text} I first have to \definecolor[somecolor][r=.4,g=0,b=1].  Currently
I'm trying to do automated colorizing with the help of some lua code and
I'd like to make up rgb vectors on the spot without having to
\definecolor them first, e.g. something like \color[r=.4,g=0,b=1]
{colored text}.  Is there a way to achieve this in mkiv?  (Right now I'm
assigning new rgb values to the same color name whenever the function
is called that concatenates the next \color[]{} statement.  This seems a
bit verbose and hacky to me.)


\colored[r=...,g=...,b=...]{...}

or

{\colored[r=...,g=...,b=...]...}

Wolfgang

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

[NTG-context] colors in mkiv

[Wolfgang Schuster]

Hi,

does it make any sense to disable colors by default in mkiv?

Wolfgang

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in mkiv

[Wolfgang Schuster]

Am 12.04.2009 um 12:55 schrieb Hans Hagen:


Wolfgang Schuster wrote:

Hi,
does it make any sense to disable colors by default in mkiv?


you mean: enabled by default?


Yes.

Wolfgang

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in mkiv

[Hans Hagen]

Wolfgang Schuster wrote:

Hi,

does it make any sense to disable colors by default in mkiv?


you mean: enabled by default?

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in mkiv

[Hans Hagen]

Wolfgang Schuster wrote:


Am 12.04.2009 um 12:55 schrieb Hans Hagen:


Wolfgang Schuster wrote:

Hi,
does it make any sense to disable colors by default in mkiv?


you mean: enabled by default?


Yes.


no problem for me (as i always eneble color) .. so if there are no big 
complaints on the list we can do it ... remind me in a few weeks then



-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in mkiv

[Hans van der Meer]

I would like to support the idea of enabling colors by default. Not in  
the least because I always tend to forget it at first. And if it  
doesn't really slow the system down, there seems no reason not to  
enable by default.


Hans van der Meer




On 12 apr 2009, at 14:43, Hans Hagen wrote:


Wolfgang Schuster wrote:

Am 12.04.2009 um 12:55 schrieb Hans Hagen:

Wolfgang Schuster wrote:

Hi,
does it make any sense to disable colors by default in mkiv?


you mean: enabled by default?

Yes.


no problem for me (as i always eneble color) .. so if there are no  
big complaints on the list we can do it ... remind me in a few weeks  
then



-
 Hans Hagen | PRAGMA ADE
 Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an  
entry to the Wiki!


maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___


___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors

[Lutz Haseloff]

Hi Taco, hi Hans,

Thank you very much, it works fine again.


Greetings Lutz



2009/3/30 Hans Hagen pra...@wxs.nl

 Lutz Haseloff wrote:

 Hi all,

 with the latest ConTeXt  ver: 2009.03.29 13:28 MKIV
 and LuaTeX, Version snapshot-0.37.0-2009032922
 I can't get colored text:

 \setupcolors[state=start]
 \setuppagenumbering[state=stop]
 \starttext
 {\red red}

 {\green this is typeset
 in green}

 {\middlemagenta this is typeset
 in dark middlemagenta}
 \stoptext


 taco and i have it running here ... has to do with low level change in
 attributes so the upcoming beta also needs a new binary

 -
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
 -

 ___
 If your question is of interest to others as well, please add an entry to
 the Wiki!

 maillist : ntg-context@ntg.nl /
 http://www.ntg.nl/mailman/listinfo/ntg-context
 webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
 archive  : https://foundry.supelec.fr/projects/contextrev/
 wiki : http://contextgarden.net

 ___

___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors

[Hans Hagen]

Lutz Haseloff wrote:

Hi all,

with the latest ConTeXt  ver: 2009.03.29 13:28 MKIV
and LuaTeX, Version snapshot-0.37.0-2009032922
I can't get colored text:

\setupcolors[state=start]
\setuppagenumbering[state=stop]
\starttext
{\red red}

{\green this is typeset
in green}

{\middlemagenta this is typeset
in dark middlemagenta}
\stoptext


could be related to the new binary ... we're looking into it

Hans

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors

[Taco Hoekwater]

Hans Hagen wrote:
 Lutz Haseloff wrote:
 Hi all,

 with the latest ConTeXt  ver: 2009.03.29 13:28 MKIV
 and LuaTeX, Version snapshot-0.37.0-2009032922
 I can't get colored text:
 
 could be related to the new binary ... we're looking into it

Yes, that was totally my fault. The current trunk should be OK again.

Best wishes,
Taco


___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] Colors

[Hans Hagen]

Lutz Haseloff wrote:

Hi all,

with the latest ConTeXt  ver: 2009.03.29 13:28 MKIV
and LuaTeX, Version snapshot-0.37.0-2009032922
I can't get colored text:

\setupcolors[state=start]
\setuppagenumbering[state=stop]
\starttext
{\red red}

{\green this is typeset
in green}

{\middlemagenta this is typeset
in dark middlemagenta}
\stoptext


taco and i have it running here ... has to do with low level change in 
attributes so the upcoming beta also needs a new binary


-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

[NTG-context] Colors

[Lutz Haseloff]

Hi all,

with the latest ConTeXt  ver: 2009.03.29 13:28 MKIV
and LuaTeX, Version snapshot-0.37.0-2009032922
I can't get colored text:

\setupcolors[state=start]
\setuppagenumbering[state=stop]
\starttext
{\red red}

{\green this is typeset
in green}

{\middlemagenta this is typeset
in dark middlemagenta}
\stoptext


Greetings Lutz
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

[NTG-context] colors questions

[Alan Stone]

Source: texshow

(1) \setupinteraction
color  name
contrastcolor  name

How do you set the setupinteraction contrastcolor background color ?

(2) \defineinteractionmenu, \setupinteractionmenu, \interactionbuttons

color   name
background screen color none foreground name
backgroundcolor  name
foregroundcolorname

(2.1) What is background=

- screen ?

- color ?

- foreground ?

(2.2) What's the difference between

- color and foregroundcolor ?

- background=name and backgroundcolor=name ?

- how do you set a, or override (1)'s, selected item background color ?

-- 
Best,
Alan

* using ConTeXt ver: 2008.08.18 14:00 MKIV fmt: 2008.8.22 int:
english/english (on Windows XP)
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors questions

[Alan Stone]

Thanks Hans.

Still about setupinteraction's contrastcolor.

In an interactionmenu, how do you maintain an item's color to
contrastcolor when the corresponding section spans over more than
one screen/page ? It switches back to color after the first
screen/page.


On Mon, Sep 8, 2008 at 11:30 AM, Hans Hagen [EMAIL PROTECTED] wrote:
 Alan Stone wrote:
 Source: texshow

 (1) \setupinteraction
 color  name
 contrastcolor  name

 How do you set the setupinteraction contrastcolor background color ?

 hm, there is no interactionbackgroundcolor (maybe some day in mkiv when
 i've redone hyperlinks)

 (2) \defineinteractionmenu, \setupinteractionmenu, \interactionbuttons

 color   name
 background screen color none foreground name
 backgroundcolor  name
 foregroundcolorname

 (2.1) What is background=

 - screen ?

 grayscale

 - color ?

 color

 - foreground ?

 color of content (like text)

 (2.2) What's the difference between

 - color and foregroundcolor ?

 foregroundcolor is somewhat special in the sense that it applies to the
 'framed' content; in mkiv we use whatsits to track color and using
 colors around your boxed content might interfere so therefore we have
 this special less interfering foregroundcolor; in mkiv this interference
 is gone (by design)

 - background=name and backgroundcolor=name ?

 background={somecolorname,somebackgroundthing,somemore)

 i.e. can be a sequence of things to be applied (just grep for
 background= in the s-*.tex files)

 Hans

 (keep in mind that tex itself has no concept of color, nor of backgrounds)




-- 
Best,
Alan

* using ConTeXt ver: 2008.08.18 14:00 MKIV fmt: 2008.8.22 int:
english/english (on Windows XP)
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors questions

[Hans Hagen]

Alan Stone wrote:
 Thanks Hans.
 
 Still about setupinteraction's contrastcolor.
 
 In an interactionmenu, how do you maintain an item's color to
 contrastcolor when the corresponding section spans over more than
 one screen/page ? It switches back to color after the first
 screen/page.

indeed, just a compare of the reference page with the current page; no 
spans

Hans

-
   Hans Hagen | PRAGMA ADE
   Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
  | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors questions

[Alan Stone]

 indeed, just a compare of the reference page with the current page; no
 spans

That's a feature request then. Samewise for interaction buttons.

Thanks,
Alan

On Mon, Sep 8, 2008 at 1:37 PM, Hans Hagen [EMAIL PROTECTED] wrote:
 Alan Stone wrote:
 Thanks Hans.

 Still about setupinteraction's contrastcolor.

 In an interactionmenu, how do you maintain an item's color to
 contrastcolor when the corresponding section spans over more than
 one screen/page ? It switches back to color after the first
 screen/page.

 indeed, just a compare of the reference page with the current page; no
 spans

 Hans
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors questions

[Hans Hagen]

Alan Stone wrote:
 Source: texshow
 
 (1) \setupinteraction
 color  name
 contrastcolor  name
 
 How do you set the setupinteraction contrastcolor background color ?

hm, there is no interactionbackgroundcolor (maybe some day in mkiv when 
i've redone hyperlinks)

 (2) \defineinteractionmenu, \setupinteractionmenu, \interactionbuttons
 
 color   name
 background screen color none foreground name
 backgroundcolor  name
 foregroundcolorname
 
 (2.1) What is background=
 
 - screen ?

grayscale

 - color ?

color

 - foreground ?

color of content (like text)

 (2.2) What's the difference between
 
 - color and foregroundcolor ?

foregroundcolor is somewhat special in the sense that it applies to the 
'framed' content; in mkiv we use whatsits to track color and using 
colors around your boxed content might interfere so therefore we have 
this special less interfering foregroundcolor; in mkiv this interference 
is gone (by design)

 - background=name and backgroundcolor=name ?

background={somecolorname,somebackgroundthing,somemore)

i.e. can be a sequence of things to be applied (just grep for 
background= in the s-*.tex files)

Hans

(keep in mind that tex itself has no concept of color, nor of backgrounds)


-
   Hans Hagen | PRAGMA ADE
   Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
  | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in pgf within context

[Alan BRASLAU]

Hello,

Another problem with PGF+ConTeXt is the handling of cmyk colors:

\usemodule[tikz]
\setupcolors[state=start]
\definecolor[my_yellow][c=0,m=0.3,y=0.94,k=0]
\starttext
\startcolor[my_yellow]
Yellow text.
\stopcolor
\starttikzpicture
\fill[my_yellow] (0,0) circle(1);
\stoptikzpicture
\stoptext

CMYK colors work in ConTeXt but do not get passed correctly to PGF/TikZ.
A work-around is to transform to rgb :
\definecolor[my_yellow][r=0.98,g=0.698,b=0.09] % 250,178,23 #FAB217

This seems to be a documented bug; Perhaps it will be fixed someday...

Alan

On Tuesday 19 February 2008 04:47:35 Aditya Mahajan wrote:
 On Mon, 18 Feb 2008, Jesse Alama wrote:
  Hi Aditya,
 
  Thanks for the help -- I think I now see why there is such trouble with
  colors in pgf and context.  It looks like one can systematically
  transform LaTeX-like PGF examples of \color into ConTeXt examples.
 
  The reason why this came up is that I'm trying to go through Till
  Tantau's Example for Karl's Students tutorial in the PGF/TikZ manual.
  Has anyone managed to ConTeXt-ify that example?

 I did that some time back while testing tikz. I will send that file as a
 reply to this email, since I am not sure if it will go through the mailing
 list because of its size.

  The example features some \definecolor's which I just did away with
  (sadly) by simply substituting their defining values for their
  occurences.  (This is unfortunate, but perhaps necessary until some
  other mechanism is produced.)  The problem is that the text box to the
  right of the picture is supposed to be colored, and with rounded
  corners.  But the box is missing.  Look at p. 20 of

 The TikZ manual make a lot of uses of the xcolor syntax (e.g.
 \color{red!20}). There is no equivalent ConTeXt syntax. You need to define
 a color, say lightred, as follows

 \definecolor[lightred][r=0.2]

 For tikz key-value options, pgf works behind the scene to define
 appropriate colors, so xcolor syntax works for them. So
 \fill[fillcolor=red!20] will work as expected. However, when using \color
 inside any box, you need to follow ConTeXt syntax. So \color[red!20] will
 not work, you need to define a context color and then use that.

 Hope that this clarifies some things.

 Aditya
 ___
 If your question is of interest to others as well, please add an
 entry to the Wiki!

 maillist : ntg-context@ntg.nl /
 http://www.ntg.nl/mailman/listinfo/ntg-context webpage  :
 http://www.pragma-ade.nl / http://tex.aanhet.net
 archive  : https://foundry.supelec.fr/projects/contextrev/
 wiki : http://contextgarden.net
 ___




-- 
Alan Braslau
CEA DSM-IRAMIS-SPEC
CNRS URA 2464
Orme des Merisiers
91191 Gif-sur-Yvette cedex FRANCE
tel: +33 1 69 08 73 15
fax: +33 1 69 08 87 86
mailto:[EMAIL PROTECTED]

http://www-dna2006.cea.fr/

 .''`.
: :'  :
`. `'`
  `-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in pgf within context

[Hans Hagen]

Jesse Alama wrote:
 Hi Aditya,
 
 Thanks for the help -- I think I now see why there is such trouble with
 colors in pgf and context.  It looks like one can systematically
 transform LaTeX-like PGF examples of \color into ConTeXt examples.

keep in mind that color handles sveral grouping cases:

{\somecolor whatever}

\color[somecolor]{whatever}

all use the same underlying mechanissm (and sometimes aftergroup to 
revert to the outer color; this may interfere when grouping is kind of 
unpredictable

in case of doubt: \color[name]{..} works best (explicit braces)



-
   Hans Hagen | PRAGMA ADE
   Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
  | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in pgf within context

[Jesse Alama]

Aditya Mahajan [EMAIL PROTECTED] writes:

 The example features some \definecolor's which I just did away with
 (sadly) by simply substituting their defining values for their
 occurences.  (This is unfortunate, but perhaps necessary until some
 other mechanism is produced.)  The problem is that the text box to the
 right of the picture is supposed to be colored, and with rounded
 corners.  But the box is missing.  Look at p. 20 of

 The TikZ manual make a lot of uses of the xcolor syntax
 (e.g. \color{red!20}). There is no equivalent ConTeXt syntax. You need
 to define a color, say lightred, as follows

 \definecolor[lightred][r=0.2]

 For tikz key-value options, pgf works behind the scene to define
 appropriate colors, so xcolor syntax works for them. So
 \fill[fillcolor=red!20] will work as expected. However, when using
 \color inside any box, you need to follow ConTeXt syntax. So
 \color[red!20] will not work, you need to define a context color and
 then use that.

I'm still not able to get fillcolor to work with the information box:

  \starttikzpicture[scale=4,information text/.style={fill=red}]
  \draw[xshift=1.85cm] node[right,text width=6cm,information text] 
  { 
  The \color[green]{angle $\alpha$} is
$30^\circ$ in the example ($\pi/6$ in radians). The \color[red]{sine
  of $\alpha$}, which is the height of the red line, is
  \startformula
  \color[red]{\sin \alpha} = 1/2.
  \stopformula
  By the Theorem of Pythagoras ... 
  };

Is ConTeXt correctly parsing the key information tex/.style?

Jesse

-- 
Jesse Alama ([EMAIL PROTECTED])
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in pgf within context

[Jesse Alama]

Hi Aditya,

Thanks for the help -- I think I now see why there is such trouble with
colors in pgf and context.  It looks like one can systematically
transform LaTeX-like PGF examples of \color into ConTeXt examples.

The reason why this came up is that I'm trying to go through Till
Tantau's Example for Karl's Students tutorial in the PGF/TikZ manual.
Has anyone managed to ConTeXt-ify that example?  The closest that I've come is

  \usemodule[tikz]
  \setupcolors[state=start]
  \starttext
  \starttikzpicture
[scale=3,
 line cap=thin,
 %Styles
 axes/.style=, 
 important line/.style={very thick}, 
 information text/.style={rounded corners,fill=red!10,inner sep=1ex}] 
  % Local definitions 
  \def\costhirty{0.8660256} 
  % The graphic 
  \draw[help lines,step=0.5cm] (-1.4,-1.4) grid (1.4,1.4); 
  \draw (0,0) circle (1cm); 
  \startscope[axes] 
  \draw[-] (-1.5,0) -- (1.5,0) node[right] {$x$} coordinate(x axis); 
  \draw[-] (0,-1.5) -- (0,1.5) node[above] {$y$} coordinate(y axis); 
  \foreach \x/\xtext in {-1, -.5/-\frac{1}{2}, 1} 
  \draw[xshift=\x cm] (0pt,1pt) -- (0pt,-1pt) node[below,fill=white] 
{$\xtext$}; 
  \foreach \y/\ytext in {-1, -.5/-\frac{1}{2}, .5/\frac{1}{2}, 1} 
  \draw[yshift=\y cm] (1pt,0pt) -- (-1pt,0pt) node[left,fill=white] {$\ytext$}; 
  \stopscope
  \filldraw[fill=green!20,draw=green!50!black] (0,0) -- (3mm,0pt) 
arc(0:30:3mm); 
  \draw (15:2mm) node[green!50!black] {$\alpha$}; 
  \draw[important line,red] 
  (30:1cm) -- node[left=1pt,fill=white] {$\sin \alpha$} (30:1cm |- x axis); 
  
  \draw[important line,orange!80!black] (1,0) -- node[right=1pt,fill=white] { 
  $\displaystyle \tan \alpha \color[black]{=}
  \frac{\color[red]{\sin \alpha}}{\color[blue]{\cos \alpha}}$} 
  (intersection of 0,0--30:1cm and 1,0--1,1) coordinate (t); 
  \draw (0,0) -- (t); 
  \draw[xshift=1.85cm] 
  node[right,text width=6cm,information text] 
  { 
  The \color[green!50!black]{angle $\alpha$} is $30^\circ$ in the 
  example ($\pi/6$ in radians). The \color[red]{sine of 
  $\alpha$}, which is the height of the red line, is 
  \startformula
  \color[red]{\sin \alpha} = 1/2.
  \stopformula
  By the Theorem of Pythagoras ... 
  }; 
  \stoptikzpicture
  \stoptext

The example features some \definecolor's which I just did away with
(sadly) by simply substituting their defining values for their
occurences.  (This is unfortunate, but perhaps necessary until some
other mechanism is produced.)  The problem is that the text box to the
right of the picture is supposed to be colored, and with rounded
corners.  But the box is missing.  Look at p. 20 of

  http://altermundus.com/downloads/pgfmanual_cvs.pdf
  
to see what I mean.  Also, the phrase angle $\alpha$ is supposed to be
in a kind of green, but that's not working either.  What might be
happening?

Thanks,

Jesse

Aditya Mahajan [EMAIL PROTECTED] writes:

 I am CCing to the context list also.

 On Mon, 18 Feb 2008, Jesse Alama wrote:

 Hi Aditya,

 I recently came across a thread on the PGF users mailing list in which
 you mention some problems with ConTeXt, PGF and colors.  For example:

  http://article.gmane.org/gmane.comp.tex.pgf.user/38

 Have these issues beein resolved for your?  I just downloaded PFG 1.18
 from the modules part of the contextgarden, installed it, and, when
 trying to compile the following example PGF code

  \starttikzpicture[scale=3]
\clip (-2,-0.2) rectangle (2,0.8);
\draw[step=.5cm,gray,very thin] (-1.4,-1.4) grid (1.4,1.4);
\filldraw[fill=green!20,draw=green!50!black] (0,0) -- (3mm,0mm) arc
(0:30:3mm) -- cycle;
\draw[-] (-1.5,0) -- (1.5,0) coordinate (x axis);
\draw[-] (0,-1.5) -- (0,1.5) coordinate (y axis);
\draw (0,0) circle (1cm);

\draw[very thick,red]
  (30:1cm) -- node[left=1pt,fill=white] {$\sin \alpha$} (30:1cm |- x 
 axis);
\draw[very thick,blue]
  (30:1cm |- x axis) -- node[below=2pt,fill=white] {$\cos \alpha$} (0,0);
\draw[very thick,orange]  (1,0) -- node [right=1pt,fill=white]
  {$\displaystyle \tan \alpha \color{black}=
\frac{{\color[red]\sin \alpha}}{{\color[blue]\cos \alpha}}$}
  (intersection of 0,0--30:1cm and 1,0--1,1) coordinate (t);

\draw (0,0) -- (t);
\foreach \x/\xtext in {-1, -0.5/-\frac{1}{2}, 1}
\draw (\x cm,1pt) -- (\x cm,-1pt) node[anchor=north,fill=white] 
 {$\xtext$};
\foreach \y/\ytext in {-1, -0.5/-\frac{1}{2}, 0.5/\frac{1}{2}, 1}
\draw (1pt,\y cm) -- (-1pt,\y cm) node[anchor=east,fill=white] {$\ytext$};
  \stoptikzpicture

 (which is taken from the PGF manual), I get

  ! Use of \color doesn't match its definition.
  [EMAIL PROTECTED] ...{$\displaystyle \tan \alpha \color {
black}= \frac {{\color 
 {re...

  [EMAIL PROTECTED]@[EMAIL PROTECTED] ...mmand [EMAIL PROTECTED]
[EMAIL PROTECTED] [EMAIL 
 PROTECTED]@[EMAIL PROTECTED]@...

  [EMAIL PROTECTED]@[EMAIL PROTECTED] [EMAIL PROTECTED]@onpath
  

[NTG-context] colors in luatex

[Thomas A. Schmitz]

Hi,

this minimal example compiles fine in mkii:

\setupcolors[state=start]

\starttext

\starttabulate
\startcolor[red]
\NC One \NC A \NC \NR
\NC Two \NC B \NC \NR
\stopcolor
\NC Three \NC C \NC \NR
\stoptabulate

\stoptext

With mkiv, I get this error:

! Missing \endgroup inserted.
inserted text
 \endgroup
to be read again
\endtemplate
template \endtemplate

\tabulatenormalcolumn #1-
\iftabulateequal \tabulateequalpos \else  
\tabulat...
\tabulatecontent -\par \startcolor [red] \NC
   One \NC A \NC \NR \NC  
Two \NC ...
\fulltabulatecontent ...dcontent \tabulatecontent

\tabulatetailcontent \remo...
...
l.13 \stoptabulate

Bug, or anything wrong with the code?

Thomas
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

Re: [NTG-context] colors in luatex

[Hans Hagen]

Thomas A. Schmitz wrote:
 Hi,
 
 this minimal example compiles fine in mkii:
 
 \setupcolors[state=start]
 
 \starttext
 
 \starttabulate
 \startcolor[red]
 \NC One \NC A \NC \NR
 \NC Two \NC B \NC \NR
 \stopcolor
 \NC Three \NC C \NC \NR
 \stoptabulate
 
 \stoptext

well, with mkii you're just lucky, since this is not supposed to work 
anyway; you're mixing grouping models and it's pure luck if an 
aftergroup trick then injects the right egroup

you need to switch inside the cells

Hans



-
   Hans Hagen | PRAGMA ADE
   Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
  | www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the 
Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___

[NTG-context] Colors and images Context

[luigi scarso]

2 questions for colors
1) Does ConTeXt offer complete color gestion as pdf spec 1.6  or there
are some features not implemented ?
2)  Preparing a pdf with bitmap colored images for offset press (ie
covers for manuals): are png or jpeg an optimal solution or tiff is
better ? RGB or CMYK ?

Thanks in advance
luigi
___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] Colors and images Context

[Hans Hagen]

luigi scarso wrote:
 2 questions for colors
 1) Does ConTeXt offer complete color gestion as pdf spec 1.6  or there
 are some features not implemented ?
   
what do you need ... process- and spotcolors are implemented, as are 
duotones; transparency has been around for years now.

 2)  Preparing a pdf with bitmap colored images for offset press (ie
 covers for manuals): are png or jpeg an optimal solution or tiff is
 better ? RGB or CMYK ?
   
normally an unscaled  cmyk jpeg of medium compression quality is ok (a 
24 meg tiff graphic is not per definition better than a 4 meg jpeg image)

Hans

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
 | www.pragma-pod.nl
-

___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] Colors and images Context

[luigi scarso]

 normally an unscaled  cmyk jpeg of medium compression quality is ok (a
 24 meg tiff graphic is not per definition better than a 4 meg jpeg image)

 Hans

Thanks
 Also in pdftex mailing list, thread Best bitmap image format?
___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

[NTG-context] colors in MPgraphic

[Hans van der Meer]

In MPgrapic I do want my own colors for drawing lines etc.
These are set up in plain.mf's (_op_ and background).
In \startMPinclusions I just do that in order to get the drawing  
color I want.
But then \startMPgraphic appears to reset colors (both _op_ and  
background I suspect).
Can this be changed? In plain.mf there is already a setup, so there  
seems no reason for \startMPgraphic to interfere.
It would be nice if the color setup done in \startMPinclusions would  
be honored.
It is a nuisance to have them set up in a special initalization file  
and then being forced to repeat this at the start of every graphic.


Question: what tinkering with metapost parameters is done in  
\startMPgraphic exactly? (I could not find out readily from the  
ConTeXt sources)
Which of these can be removed without danger for its operation,  
leaving settings in \startMPinclusions unchanged -- and will that be  
done?


yours sincerely,
dr. H. van der Meer



___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] colors in MPgraphic

[Mojca Miklavec]

 Question: what tinkering with metapost parameters is done in
 \startMPgraphic exactly? (I could not find out readily from the
 ConTeXt sources)
 Which of these can be removed without danger for its operation,
 leaving settings in \startMPinclusions unchanged -- and will that be
 done?

Hans will probably answer you better, but in
http://source.contextgarden.net/metafun.mp
there are files with metafun macros included which may set their own
colors. See those files.

I doubt that any definitions can be removed without breaking anything
(otherwise they wouldn't be there), but I agree that MPinclusions
could/should be included AFTER metafun macros if they're not (I didn't
check).

Mojca
___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] colors in MPgraphic

[Hans Hagen]

Mojca Miklavec wrote:


Question: what tinkering with metapost parameters is done in
\startMPgraphic exactly? (I could not find out readily from the
ConTeXt sources)
Which of these can be removed without danger for its operation,
leaving settings in \startMPinclusions unchanged -- and will that be
done?
   



Hans will probably answer you better, but in
http://source.contextgarden.net/metafun.mp
there are files with metafun macros included which may set their own
colors. See those files.

I doubt that any definitions can be removed without breaking anything
(otherwise they wouldn't be there), but I agree that MPinclusions
could/should be included AFTER metafun macros if they're not (I didn't
check).
 



(1) metafun is a format and will be loaded first
(2) inclusion scome after loading the format
(3) context only sets a bunch of variables which tell metafun certain 
things


i'm not sure what you mean with tinkering

what parameters give you problems?

concerning backgrounds  and plain.mf ... metafont has bacckgrounds, 
metapost doesn't ; in mp the background is used for unfilling


if you want to set the background / add own stuff you can probably best 
append the relevant settings / definitions to the extra_beginfig string 
(grep for that one)


Hans
___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] colors in MPgraphic

[Taco Hoekwater]

Hans van der Meer wrote:

In MPgrapic I do want my own colors for drawing lines etc.
These are set up in plain.mf's (_op_ and background).
In \startMPinclusions I just do that in order to get the drawing  color 
I want.
But then \startMPgraphic appears to reset colors (both _op_ and  
background I suspect).


The resetfig() macro from metafun clears _op_ and background.
I don't know why, but there''' be a reason for it, I am sure ;-)

There almost certainly is an 'official' way to add some statements to
the beginning of each figure, but, in any case, it works if you store
your settings in extra_beginfig:

  \startMPinclusions
  extra_beginfig := drawoptions(withcolor green);
  \stopMPinclusions


Cheers, Taco
___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] colors in MPgraphic

[Hans Hagen]

Taco Hoekwater wrote:




Hans van der Meer wrote:


In MPgrapic I do want my own colors for drawing lines etc.
These are set up in plain.mf's (_op_ and background).
In \startMPinclusions I just do that in order to get the drawing  
color I want.
But then \startMPgraphic appears to reset colors (both _op_ and  
background I suspect).



The resetfig() macro from metafun clears _op_ and background.
I don't know why, but there''' be a reason for it, I am sure ;-)


sure -) [i need to think a bit]



There almost certainly is an 'official' way to add some statements to
the beginning of each figure, but, in any case, it works if you store
your settings in extra_beginfig:

  \startMPinclusions
  extra_beginfig := drawoptions(withcolor green);
  \stopMPinclusions


maybe best is to append instead of assign

Hans
___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] colors in MPgraphic

[Hans van der Meer]

On Jan 6, 2006, at 15:19, Taco Hoekwater wrote:


There almost certainly is an 'official' way to add some statements to
the beginning of each figure, but, in any case, it works if you store
your settings in extra_beginfig:

  \startMPinclusions
  extra_beginfig := drawoptions(withcolor green);
  \stopMPinclusions


Didn't know about extra_beginfig but that did the trick.
Thanks!

yours sincerely,
dr. H. van der Meer


___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] colors in MPgraphic

[Hans van der Meer]

On Jan 6, 2006, at 18:56, Hans Hagen wrote:



There almost certainly is an 'official' way to add some statements to
the beginning of each figure, but, in any case, it works if you store
your settings in extra_beginfig:

  \startMPinclusions
  extra_beginfig := drawoptions(withcolor green);
  \stopMPinclusions


maybe best is to append instead of assign



I am not sure about the exact syntax of that append.
Is there a special macro in the context/metafun package or is it
extra_beginfig := extra_beginfigdrawoptions(withcolor green);?

yours sincerely,
dr. H. van der Meer


___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] colors in MPgraphic

[Hans Hagen]

Hans van der Meer wrote:



I am not sure about the exact syntax of that append.
Is there a special macro in the context/metafun package or is it
extra_beginfig := extra_beginfigdrawoptions(withcolor green);?


that's indeed an append (or actually a concat)

Hans
___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

[NTG-context] colors in metafont

[Hans van der Meer]

Normally metapost/metafun starts out drawing in black.

Is it possible to change this globally, so that withcolor xyz is  
not needed everytime another color is wanted?


Also is it possible to get/save/restore the current drawing color  
(a la savepen) in metapost/metafun?


I searched through various manuals but I might have missed the  
reference.


yours sincerely,
dr. H. van der Meer



___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] colors in metafont

[Taco Hoekwater]

Hans van der Meer wrote:

Normally metapost/metafun starts out drawing in black.

Is it possible to change this globally, so that withcolor xyz is  not 
needed everytime another color is wanted?


Also is it possible to get/save/restore the current drawing color  (a 
la savepen) in metapost/metafun?


I searched through various manuals but I might have missed the  reference.


not precisely, but drawoptions() comes close.

  beginfig(1);
  drawoptions(withcolor red);
  fill unitsquare scaled 20;
  drawoptions();
  fill unitsquare scaled 10;
  endfig;

Cheers, Taco
___
ntg-context mailing list
ntg-context@ntg.nl
http://www.ntg.nl/mailman/listinfo/ntg-context

[NTG-context] Colors changing when applying transparent

[Willi Egger]

Hi,

I would like to use transparnt colors in one of the documents. However the 
resulting color is different with transparent color. Could anyone try the 
following code twice setting the %-sign in front of the fill-statement:

\setupoutput[pdftex]
\starttext
\setupcolors[state=start]
\startuseMPgraphic{tBG}
path p ;
p := unitsquare xscaled \overlaywidth yscaled \overlayheight ;
fill p withcolor \MPcolor{white}; % With normal colors, everything 
is fine (blue is really RGB(0,0,1)
% fill p withcolor transparent(normal,.5,\MPcolor{white}); % 
This however results in fading of ALL of the colors...
\stopuseMPgraphic

\defineoverlay[textBG][\useMPgraphic{tBG}]

\setupbackgrounds[page][background=color,backgroundcolor=blue]
\setupbackgrounds[text][background=textBG]
\input tufte
\stoptext
I would expect that the optical appearance of blue shoud not change after 
application of the transparent color to the gray areq.

Regards Willi 

___
ntg-context mailing list
[EMAIL PROTECTED]
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] Colors changing when applying transparent

[Hans Hagen]

At 09:20 25/11/2003, you wrote:
\setupoutput[pdftex]
\starttext
\setupcolors[state=start]
\startuseMPgraphic{tBG}
path p ;
p := unitsquare xscaled \overlaywidth yscaled \overlayheight ;
fill p withcolor \MPcolor{white}; % With normal colors, 
everything is fine (blue is really RGB(0,0,1)
% fill p withcolor transparent(normal,.5,\MPcolor{white}); % 
This however results in fading of ALL of the colors...
\stopuseMPgraphic

\defineoverlay[textBG][\useMPgraphic{tBG}]

\setupbackgrounds[page][background=color,backgroundcolor=blue]
\setupbackgrounds[text][background=textBG]
\input tufte
\stoptext
Looks like an acrobat bug to me; if you use gsview, it works ok; there are 
more problems with acrobat and transparencies, like

- no smoothing when a vector graphic is on top of a transparency
- disappearing characters (esp very big ones)
- funny flattener preview colors
One of the reasons for such problems is that there is no 'reset graphics 
state' operator and i guess that occasionally the acrobat graphic state 
stack gets messed up.

Hans



-
  Hans Hagen | PRAGMA ADE | [EMAIL PROTECTED]
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
-
   information: http://www.pragma-ade.com/roadmap.pdf
documentation: http://www.pragma-ade.com/showcase.pdf
-
___
ntg-context mailing list
[EMAIL PROTECTED]
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] Colors changing when applying transparent

[Willi Egger]

Hi Hans,

Indeed now I tried in Acrobat5 and the problem does not show up.

There is probably another bug to be reported:

I got a file, where with \startcombination ... \stopcombination two small 
pictures are placed next to each other. - When viewing the result in 
Acrobat6 everything looks ok. When printing the page, then the right 
picture will not show up on the print!

Kind regards Willi

At 10:37 25.11.2003, Hans wrote:
At 09:20 25/11/2003, you wrote:
\setupoutput[pdftex]
\starttext
\setupcolors[state=start]
\startuseMPgraphic{tBG}
path p ;
p := unitsquare xscaled \overlaywidth yscaled \overlayheight ;
fill p withcolor \MPcolor{white}; % With normal colors, 
everything is fine (blue is really RGB(0,0,1)
% fill p withcolor transparent(normal,.5,\MPcolor{white}); % 
This however results in fading of ALL of the colors...
\stopuseMPgraphic

\defineoverlay[textBG][\useMPgraphic{tBG}]

\setupbackgrounds[page][background=color,backgroundcolor=blue]
\setupbackgrounds[text][background=textBG]
\input tufte
\stoptext
Looks like an acrobat bug to me; if you use gsview, it works ok; there are 
more problems with acrobat and transparencies, like

- no smoothing when a vector graphic is on top of a transparency
- disappearing characters (esp very big ones)
- funny flattener preview colors
One of the reasons for such problems is that there is no 'reset graphics 
state' operator and i guess that occasionally the acrobat graphic state 
stack gets messed up.

Hans



-
  Hans Hagen | PRAGMA ADE | [EMAIL PROTECTED]
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
-
   information: http://www.pragma-ade.com/roadmap.pdf
documentation: http://www.pragma-ade.com/showcase.pdf
-
___
ntg-context mailing list
[EMAIL PROTECTED]
http://www.ntg.nl/mailman/listinfo/ntg-context
___
ntg-context mailing list
[EMAIL PROTECTED]
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] Colors changing when applying transparent

[Hans Hagen]

At 12:46 25/11/2003, you wrote:

Indeed now I tried in Acrobat5 and the problem does not show up.

There is probably another bug to be reported:

I got a file, where with \startcombination ... \stopcombination two small 
pictures are placed next to each other. - When viewing the result in 
Acrobat6 everything looks ok. When printing the page, then the right 
picture will not show up on the print!
there are indeed some bugs with regard to xforms; you can try to print 'as 
image'

Hans

___
ntg-context mailing list
[EMAIL PROTECTED]
http://www.ntg.nl/mailman/listinfo/ntg-context

Re: [NTG-context] Colors changing when applying transparent

[Willi Egger]

Hoi Hans,

Bedankt voor de link

Het ziet er steeds gelikter uit.

Op pagina 156 staat Haas'sche Schriftgiesserei Het apostroofje is 
vervangen door een kapitaal S-caron. -  Dit is nogal raar omdat er op 
verschillende andere plekken in dit deel van het boek apostroven gebruikt 
worden. ??

Op pagina 164 laatste paragraaf: ... the single easiest way. - Ik denk, dat 
single weg kan.
De common consensus  TeX Live is commonly seen as the most easiest way 
to get up and running a TeX system.

Groet Willi

At 13:10 25.11.2003, Hans wrote:
At 12:46 25/11/2003, you wrote:

Indeed now I tried in Acrobat5 and the problem does not show up.

There is probably another bug to be reported:

I got a file, where with \startcombination ... \stopcombination two small 
pictures are placed next to each other. - When viewing the result in 
Acrobat6 everything looks ok. When printing the page, then the right 
picture will not show up on the print!
there are indeed some bugs with regard to xforms; you can try to print 'as 
image'

Hans

___
ntg-context mailing list
[EMAIL PROTECTED]
http://www.ntg.nl/mailman/listinfo/ntg-context
___
ntg-context mailing list
[EMAIL PROTECTED]
http://www.ntg.nl/mailman/listinfo/ntg-context