使用 tikz 创建精美的章节样式

Question

有人能提出一种方法来以给定的文档为起点实现以下章节样式吗？（数字“1”是章节编号）

\documentclass{book}

\usepackage{titlesec}
\usepackage[titles]{tocloft}
\usepackage[paperheight=9.3in,paperwidth=6.85in]{geometry}

\renewcommand\cftchapfont{\normalfont}
\renewcommand\cftchappagefont{\normalfont}

\titleformat{\chapter}[display]
{}{\rule{.7\textwidth}{2pt}}{0pt}
{\hspace*{.3\textwidth}\huge\bfseries}[\addvspace{-1pt}]
\begin{document}

\mainmatter
\chapter{Test Chapter}
\section{Test Subsection}

\end{document}

Answer 1

explicit使用带有 的选项titlesec。此代码会给出与您的图片非常接近的内容。

\documentclass{book}
\usepackage{tikz}
\usepackage[explicit]{titlesec}
\usepackage[titles]{tocloft}
\usepackage[paperheight=9.3in,paperwidth=6.85in]{geometry}
\newcommand\myfancychapter{\tikz[baseline=(CHAP.base),very thick]{
  \draw[use as bounding box,draw=white,fill=white] (0,0) rectangle (2cm,2cm);
  \node[fill=white,minimum width=1.5cm,outer sep=0pt,rounded corners] (CHAP) at
  (1cm,\baselineskip+1ex) {\Huge{\textbf{\textsf{\thechapter}}}};
  \draw[draw=gray!30!white,fill=gray!30!white] (2cm,0cm) rectangle (\textwidth,2cm);
  \draw[black, ultra thick](0,1.2cm) -- (\textwidth,1.2cm);
  \draw[black, ultra thick](2cm,0cm) -- (2cm,2cm);
}}
\renewcommand\cftchapfont{\normalfont}
\renewcommand\cftchappagefont{\normalfont}

\titleformat{\chapter}
  {\normalfont}{\myfancychapter}{1em}{\LARGE{\textbf{#1}}}

\begin{document}

\mainmatter
\chapter{Test Chapter}
\section{Test Subsection}

\end{document}

我只是将数字移到了线下，因为我觉得这样看起来更好。但tikz您可以完全控制。

编辑：这是将部分编号移到线上的“最小损坏”方法。我还必须将框变大。

\documentclass{book}
\usepackage{tikz}
\usepackage[explicit]{titlesec}
\usepackage[titles]{tocloft}
\usepackage[paperheight=9.3in,paperwidth=6.85in]{geometry}
\newcommand\myfancychapter{\tikz[baseline=(CHAP.base),very thick]{
  \draw[use as bounding box,draw=white,fill=white] (0,0) rectangle (2cm,2.5cm);
  \node[fill=white,minimum width=1.5cm,outer sep=0pt,rounded corners] (CHAP) at
  (1cm,\baselineskip+1ex) {\phantom{\Huge{\textbf{\textsf{\thechapter}}}}};
  \node[fill=white,minimum width=1.5cm,outer sep=0pt,rounded corners] (CHAP2) at
  (1cm,1.8cm) {\Huge{\textbf{\textsf{\thechapter}}}};
  \draw[draw=gray!30!white,fill=gray!30!white] (2cm,0cm) rectangle (\textwidth,2.5cm);
  \draw[black, ultra thick](0,1.2cm) -- (\textwidth,1.2cm);
  \draw[black, ultra thick](2cm,0cm) -- (2cm,2.5cm);
}}
\renewcommand\cftchapfont{\normalfont}
\renewcommand\cftchappagefont{\normalfont}

\titleformat{\chapter}
  {\normalfont}{\myfancychapter}{1em}{\LARGE{\textbf{#1}}}

\begin{document}

\mainmatter
\chapter{Test Chapter}
\section{Test Subsection}

\end{document}

第二次编辑：内置@egreg 的建议。（谢谢！）

Answer 2

我认为你不需要用大锤来做这件事：tabularx，booktabs并且colortbl可以做到：

\documentclass{book}

\usepackage[explicit]{titlesec}
\usepackage[titles]{tocloft}
\usepackage[paperheight=9.3in,paperwidth=6.85in, showframe]{geometry}
\usepackage{tabularx, booktabs}
\usepackage[table, svgnames]{xcolor}
\renewcommand\cftchapfont{\normalfont}
\renewcommand\cftchappagefont{\normalfont}

\titleformat{\chapter}[block]
{\huge\bfseries}{}{0pt}
{\setlength{\extrarowheight}{3pt}\begin{tabularx}{\textwidth}{ >{\filcenter}p{1cm}!{\vrule width 2pt} >{\columncolor{Gainsboro!50!Lavender}[\tabcolsep][0pt]\filcenter}X@{}}\thechapter & \\ \specialrule{2pt}{0pt}{0pt}&#1\end{tabularx}}[\addvspace{-1pt}]

\begin{document}

\mainmatter
\chapter{Test Chapter}
\section{Test Subsection}

\end{document}