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< [[Main Page]] | [[Visuals]] >
The textbackground commands require (See, eventually, the [[write18manual:details.pdf| details]] to be enabled; see that page manual or the {{src|anch-bck.mkvi|source}} for more informationfurther explanations.)
\setupcolors[state=start]
location=paragraph, background=color, backgroundcolor=middlegraylightgray, leftoffset=.5\bodyfontsize, rightoffset=.5\bodyfontsize, topoffset=.5\bodyfontsize, bottomoffset=.5\bodyfontsize, before={\startnarrower\switchtobodyfont[small]}, after={\stopnarrower}, frame=off,]
\input samplefile{knuth}
{{todo|The background does not show here using the live, online conTeXt processor. Why?}} == backgroundoffset Background Offset ==
\starttext== Underlining with Text Backgrounds ==
\input knuthUnderlining is generally frowned upon by experienced TeXnicians. Occasionally,however, it is necessary and {{cmd|ul}} or {{cmd|underbar}} doesn’t do what you want. In thosecases using {{cmd|definetextbackground}} for the underlining may also be tried.
\startsecondary<context source="yes"> \input knuthdefinetextbackground[underline]\stopsecondary [location=text,alternative=1,background=,frame=off]
== Example: dashed underbar (by WSIf desired, 4/2011) ==the location of the line can also be adjusted.
voffset=-\strutdp, background=, frame=off, dash=1]
Remove MkII hint, enhance markup
{{todo|Add more examples of usage of textbackgrounds.}}
Pages, paragraphs, words can have a background: color or screenframe. (See, eventually, the ConTeXt creates these using [[manual:details.pdf| detailsMetaPost]] manual for further explanations.) == What if textbackground doesn't work? ==
== Example: multi-page backgrounded text ==
In the following example, we also reduce the textwidth and bodyfont size.
<context source="yes">
\definetextbackground[secondary][
\starttext \input samplefile{knuth}
\startsecondary
\stopsecondary
\input samplefile{knuth \stoptext}
</context>
The options left, right, top, bottomoffset can be replaced by backgroundoffset yielding a different result:
<context source="yes">
\runMPgraphicsfalse %Needed because the wiki runs MkII and write18 is not enableddefinetextbackground[secondary][ location=paragraph, background=color, backgroundcolor=lightgray, backgroundoffset=.5\bodyfontsize, before={\startnarrower\switchtobodyfont[small]}, after={\stopnarrower}, frame=off,] \samplefile{knuth}
\setupcolors[state=start]startsecondary\samplefile{knuth}\stopsecondary
\definetextbackground[secondary][ location=paragraph, background=color,backgroundcolor=middlegray, backgroundoffset=.5\bodyfontsize, before={\startnarrower\switchtobodyfont[small]}, after=samplefile{\stopnarrowerknuth}, frame=off]</context>
\input knuthdefinestartstop[underline] [before={\starttextbackground[underline]}, after=\stoptextbackground]
\stoptextstartTEXpageAn example with \startunderline underlined\stopunderline\ text.\stopTEXpage
</context>
<context source="yes">
\runMPgraphicsfalse startuseMPgraphic{mpos:par:columnset} % This is needed because the wiki runs MkII and write18 is not enabled.Shift underlining down a touch \iftracepositions show_multi_pars \else draw_multi_pars \fi ; path p ; p := boundingbox currentpicture ; currentpicture := currentpicture shifted (0,-StrutDepth/3) ; setbounds currentpicture to p ;\stopuseMPgraphic \definetextbackground[underline] [location=text,alternative=1,background=,frame=off] \setuppapersizedefinestartstop[B5underline] [before={\setupbodyfontstarttextbackground[10ptunderline]}, after=\stoptextbackground] \startTEXpageAn example with \startunderline underlined\stopunderline\ text.\stopTEXpage</context> === Example: dashed underbar ===(by WS, 4/2011)
<context source="yes">
\definetextbackground
[dashed]
[ location=text, framecolor=black,
alternative=1,
\starttextstartdashed \startdashed\input samplefile{ward }\stopdashed\stoptext
</context>
[[Category:Basics]]
