boxesenvironmentstcolorbox
I'd like to define a tcolorbox environment, e.g.,
\newtcolorbox{mybox}{
enhanced,
boxrule=0pt,frame hidden,
borderline west={3pt}{0pt}{Peach},
colback=Peach!5,
sharp corners
}
But I would like for each box of this kind to begin with a certain keyword, e.g., "Example" – not as a title, just as a part of the body. Is there a way to build this in to the box definition?
Thanks.
With xelatex or lualatex you could color the font instead of using the color commands. This would survive a box break:
\documentclass{article}
\usepackage{fontspec}
\setmainfont{Latin Modern Roman}
\usepackage{blindtext}
\usepackage{tcolorbox}
\tcbuselibrary{breakable}
\begin{document}
\begin{tcolorbox}[breakable]
\blindtext[3]
\addfontfeatures{Color=blue}
\blindtext[3]
\addfontfeatures{Color=red}
\blindtext
\addfontfeatures{Color=brown}
\blindtext
\end{tcolorbox}
\end{document}
I don't know about mathescape, but presumably you don't want/need to enter math mode anyway, since you just want to make a box.
So use escapechar=<char> instead. I've turned your code snippets into an MWE to more clearly show the solution, but the same escapechar=| (or some other character not used anywhere in the listing) is equally valid inside listing options in your environment's definition.
\documentclass{article}
\usepackage{tcolorbox}
\tcbuselibrary{listings}
\begin{document}
\begin{tcblisting}{listing only,listing options={basicstyle=\ttfamily,escapechar=|}}
Now is the |\fbox{winter}| of our discontent
Made glorious summer by this sun of York;
\end{tcblisting}
\end{document}
Here's the full code made into a compilable example:
\documentclass[11pt]{article}
\usepackage[pdftex]{xcolor}
\definecolor{vlgray}{gray}{0.9}
\definecolor{lgray}{gray}{0.7}
\usepackage{tcolorbox}
\tcbuselibrary{skins,breakable,listings}
\newenvironment{shk}{%
\tcblisting{listing only,colback=vlgray,colframe=vlgray,enlarge
top by=0mm,top=-2mm,bottom=2mm,enhanced,
after={\par\vspace{0.5\baselineskip}\noindent},
overlay={\node[draw,fill= black,yshift=4pt,xshift=-10pt,left,text=white,
anchor=east,font=\footnotesize\bfseries] at (frame.south east)
{Shakespeare};},
listing options={basicstyle=\small\ttfamily,breaklines=true,
language=HTML,escapechar=|},}}
{\endtcblisting}
\begin{document}
\begin{shk}
Now is the |\fbox{winter}| of our discontent
Made glorious summer by this sun of York;
\end{shk}
\end{document}
Best Answer
As an alternative to my comment, it's also possible to use
attach title to upperwhich includes the title in upper part. In this case, the font and color can be selected withfonttitleorcoltitleoptions.