使用 mdframed 将 shadebox 移至左侧？

Question

我的代码如下：

   \documentclass{book}
\usepackage{xcolor,mdframed}
\usepackage{showframe}
\begin{document}

\setlength{\marginparwidth}{2pc}

\newenvironment{codebox}{%
     \color{blue}%
   }{}%
\surroundwithmdframed[
  skipabove=\baselineskip,
  hidealllines=true,leftmargin=-24pt,innerleftmargin=-24pt,
  backgroundcolor=black!10,
]{codebox}

\begin{codebox}
All code snippets %\marginpar{MS:74} 
in the book are set aside and appear like this.  They
will show some minimal code for purposes of illustration.  For example,
this is how to compute the cosine of a sequence of numbers:
\begin{verbatim}
>>> import numpy as np
>>> x = np.random.random(100)  # 100 numbers between 0 and 1
>>> cos_x = np.cos(x)  # cosine of each element.

\end{verbatim}
For more details on the essential modules for scientific computing
in Python, see appendix~\ref{app:python_tutorial}.
\end{codebox}

\end{document}

我得到的输出为：

我需要将灰色阴影延伸至文本的最左侧，可以吗？请指教...

Answer 1

把leftmargin和innerleftmargin放到0pt，问题就解决了。我希望能够解决您的问题，尤其是能够理解您的请求。抱歉我的英语一直不好。

\documentclass{book}
\usepackage{xcolor,mdframed}
\usepackage{showframe}
\begin{document}

\setlength{\marginparwidth}{2pc}
\newenvironment{codebox}{%
     \color{blue}%
   }{}%
\surroundwithmdframed[
  skipabove=\baselineskip,
  hidealllines=true,
  leftmargin=0pt,
  innerleftmargin=0pt,
  backgroundcolor=black!10,
]{codebox}
\begin{codebox}
All code snippets %\marginpar{MS:74} 
in the book are set aside and appear like this. They
will show some minimal code for purposes of illustration.  For example,
this is how to compute the cosine of a sequence of numbers:
\begin{verbatim}
>>> import numpy as np
>>> x = np.random.random(100)  # 100 numbers between 0 and 1
>>> cos_x = np.cos(x)  # cosine of each element.
\end{verbatim}
For more details on the essential modules for scientific computing
in Python, see appendix\ldots.
\end{codebox}
\end{document}

如果要将整个东西向左移动，请添加几何包，即\usepackage[left=.5in]{geometry}。