Re: [NTG-context] Equivalent of LaTeX \cancel? and Thanks!
On Sun, Oct 12, 2008 at 4:17 PM, Hans Hagen [EMAIL PROTECTED] wrote:
Benjamin R. Haskell wrote:
Hi all,
I recently transitioned from LaTeX to ConTeXt. There was some particular
thing I needed to do (which escapes me at the moment) that was far, far
easier to do in ConTeXt than in LaTeX. And, as I've learned, I've found
that that's quite often the case. So, a huge thank you to everyone
involved.
A couple hours ago I was annoyed that I couldn't find an equivalent for
the LaTeX 'cancel' environment/command/style(?)[1]. Now, I'm truly amazed
that 'cancel' required a whole package.
After discovering that 'underline' and 'strikethrough' were implemented as
overlays, I quickly coded up the following:
\startuseMPgraphic{MyCancel}
draw (0,.2*\overlayheight)--(\overlaywidth,\overlayheight);
\stopuseMPgraphic
\defineoverlay[mycancel][\useMPgraphic{MyCancel}]
\def\cancel#1{\framed[background=mycancel,frame=off]{#1}}
Now, I'm sure this is not *quite* the right way to do it. The 'cancel'ed
items end up being placed too high on the line, and other spacings are
slightly off. But, taking a cue from underlining, I kept the MyCancel
graphic and tried:
\definetextbackground
[cancel]
[location=text,
alternative=1,
background=mycancel]
% plus boilerplate for setting up \startcancel\stopcancel
But, while composing this email, I found what I wanted, which still
isn't ``right'' in some sense:
\def\cancel#1{\framed[background=mycancel,frame=off,width=fit,height=fit,strut=no]{#1}}
I found the parameters for \framed. I'm still learning to Read The
Fantastic Manuals, but sent this anyway since I wanted to say thanks.
\startuseMPgraphic{mpos:par:cancel}
for i=1 upto nofmultipars :
draw
.2[llcorner multipars[i],ulcorner multipars[i]] --
.2[urcorner multipars[i],lrcorner multipars[i]] ;
endfor ;
\stopuseMPgraphic
\definetextbackground[cancel][location=text,mp=mpos:par:cancel]
\def\startcancel{\starttextbackground[cancel]}
\def\stopcancel {\stoptextbackground}
\def\cancel {\groupedcommand\startcancel\stopcancel}
however, this is kind of fuzzy when you cross lines
an alternative is to use:
\definetextbackground[cancel][location=text,alternative=4,background=,frame=off]
\definestartstop
[cancel]
[before={\starttextbackground[cancel]},
after=\stoptextbackground]
\definestartstop is not neccessary because \definetextbackground defines
\start/\stopcancel and \cancel as shortcuts ;-)
however, there is a glitch in the drawing so you need a patch
\startMPinclusions
def draw_multi_pars =
for i=1 upto nofmultipars :
do_draw_par(multipars[i]) ;
if boxgridtype= 1 :
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,true) ; % withcolor boxgridcolor ;
elseif boxgridtype= 2 :
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,false) ; % withcolor boxgridcolor ;
elseif boxgridtype= 3 :
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,true) ; % withcolor boxgridcolor ;
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,true) shifted (0,ExHeight) ; % withcolor boxgridcolor ;
elseif boxgridtype= 4 :
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,true) shifted (0,ExHeight/2) ; % withcolor boxgridcolor ;
elseif boxgridtype=11 :
draw
graphic_grid(multipars[i],boxgriddistance,boxgriddistance,boxgriddistance/2,boxgriddistance/2)
;
elseif boxgridtype=12 :
draw graphic_grid(multipars[i],boxgriddistance,boxgriddistance,0,0) ;
fi ;
endfor ;
enddef ;
\stopMPinclusions
(will be fixed in the next release)
Wolfgang
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Re: [NTG-context] Equivalent of LaTeX \cancel? and Thanks!
Benjamin R. Haskell wrote:
Hi all,
I recently transitioned from LaTeX to ConTeXt. There was some particular
thing I needed to do (which escapes me at the moment) that was far, far
easier to do in ConTeXt than in LaTeX. And, as I've learned, I've found
that that's quite often the case. So, a huge thank you to everyone
involved.
A couple hours ago I was annoyed that I couldn't find an equivalent for
the LaTeX 'cancel' environment/command/style(?)[1]. Now, I'm truly amazed
that 'cancel' required a whole package.
After discovering that 'underline' and 'strikethrough' were implemented as
overlays, I quickly coded up the following:
\startuseMPgraphic{MyCancel}
draw (0,.2*\overlayheight)--(\overlaywidth,\overlayheight);
\stopuseMPgraphic
\defineoverlay[mycancel][\useMPgraphic{MyCancel}]
\def\cancel#1{\framed[background=mycancel,frame=off]{#1}}
Now, I'm sure this is not *quite* the right way to do it. The 'cancel'ed
items end up being placed too high on the line, and other spacings are
slightly off. But, taking a cue from underlining, I kept the MyCancel
graphic and tried:
\definetextbackground
[cancel]
[location=text,
alternative=1,
background=mycancel]
% plus boilerplate for setting up \startcancel\stopcancel
But, while composing this email, I found what I wanted, which still
isn't ``right'' in some sense:
\def\cancel#1{\framed[background=mycancel,frame=off,width=fit,height=fit,strut=no]{#1}}
I found the parameters for \framed. I'm still learning to Read The
Fantastic Manuals, but sent this anyway since I wanted to say thanks.
\startuseMPgraphic{mpos:par:cancel}
for i=1 upto nofmultipars :
draw
.2[llcorner multipars[i],ulcorner multipars[i]] --
.2[urcorner multipars[i],lrcorner multipars[i]] ;
endfor ;
\stopuseMPgraphic
\definetextbackground[cancel][location=text,mp=mpos:par:cancel]
\def\startcancel{\starttextbackground[cancel]}
\def\stopcancel {\stoptextbackground}
\def\cancel {\groupedcommand\startcancel\stopcancel}
however, this is kind of fuzzy when you cross lines
an alternative is to use:
\definetextbackground[cancel][location=text,alternative=4,background=,frame=off]
\definestartstop
[cancel]
[before={\starttextbackground[cancel]},
after=\stoptextbackground]
however, there is a glitch in the drawing so you need a patch
\startMPinclusions
def draw_multi_pars =
for i=1 upto nofmultipars :
do_draw_par(multipars[i]) ;
if boxgridtype= 1 :
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,true) ; % withcolor boxgridcolor ;
elseif boxgridtype= 2 :
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,false) ; % withcolor boxgridcolor ;
elseif boxgridtype= 3 :
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,true) ; % withcolor boxgridcolor ;
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,true) shifted (0,ExHeight) ; % withcolor boxgridcolor ;
elseif boxgridtype= 4 :
draw baseline_grid (multipars[i],if multilocs[i]=1: down else: up
fi,true) shifted (0,ExHeight/2) ; % withcolor boxgridcolor ;
elseif boxgridtype=11 :
draw
graphic_grid(multipars[i],boxgriddistance,boxgriddistance,boxgriddistance/2,boxgriddistance/2)
;
elseif boxgridtype=12 :
draw graphic_grid(multipars[i],boxgriddistance,boxgriddistance,0,0) ;
fi ;
endfor ;
enddef ;
\stopMPinclusions
(will be fixed in the next release)
-
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
___
