boxesmdframed
I'm making a box with text inside. For it I use the package mdframed. Essentially I want a box with the left border width 2pt and the rest of the borders width 1pt.
What I've got so far:
\newmdenv[
topline=false,
rightline=false,
bottomline=false,
linewidth=2pt,]{txtbox}
You can use TikZ with the overlay option and a correct anchor. That would look like this:
\documentclass{article}
\usepackage{tikz}
\newcommand\mybox[2][]{\tikz[overlay]\node[fill=blue!20,inner sep=2pt, anchor=text, rectangle, rounded corners=1mm,#1] {#2};\phantom{#2}}
\begin{document}
\noindent
this is some text \mybox[fill=blue!20]{box} text\\
this is some text box text
\end{document}
You can specify extra options (like I have done here for the color). By using the overlay option and the text anchor we ensure correct placement and no influence on spacing. The phantom is added to get the normal spacing for the content of the box. This is the result of the example code:
Edit: To show that the vertical spacing is not affected either, consider the following:
\documentclass{article}
\usepackage{tikz}
\newcommand\mybox[2][]{\tikz[overlay]\node[fill=blue!20,inner sep=2pt, anchor=text, rectangle, rounded corners=1mm,#1] {#2};\phantom{#2}}
\begin{document}
\begin{minipage}{0.4\textwidth}
\noindent
this is some text \mybox[fill=blue!20]{box} text\\
this is some text box text
\end{minipage}
\begin{minipage}{0.4\textwidth}
\noindent
this is some text box text\\
this is some text box text
\end{minipage}
\end{document}
Which results in:
This example works for me:
\documentclass{article}
\usepackage{lipsum}
\newcounter{infobox}[section]
\renewcommand{\theinfobox}{\thesection.\arabic{infobox}}
\usepackage[framemethod=TikZ]{mdframed}
\newenvironment{infobox}[1][]{%
\refstepcounter{infobox}
\begin{mdframed}[%
frametitle={Infobox \theinfobox\ #1},
skipabove=\baselineskip plus 2pt minus 1pt,
skipbelow=\baselineskip plus 2pt minus 1pt,
linewidth=0.5pt,
frametitlerule=true,
frametitlebackgroundcolor=gray!30
]%
}{%
\end{mdframed}
}
\begin{document}
\section{Stuff}
\lipsum[1]
\begin{infobox}[Sausage]
\lipsum[2]
\label{ibx:sausage}
\end{infobox}
Infobox \ref{ibx:sausage} says:
%
\lipsum[2]
\begin{infobox}[Fried eggs]
\lipsum[4-5]
\label{ibx:eggs}
\end{infobox}
Infobox \ref{ibx:eggs} says:
%
\lipsum[4]
\lipsum[5]
\end{document}
The use of \refstepcounter instead of \stepcounter makes the current value of the infobox counter available for referencing in the text.
Note that I used the current github version of mdframed to compile this example. I didn't test whether or not it works with the current ctan version, which is older.
Best Answer
This is the
tcolorboxstyle to make such a framed box, where I exaggerated the left rule width a little bit, as a demo...