使用 Tikz 进行标题部分

Question

我正在尝试使用 TikZ 制作一个新的类似部分的标题。我基本上希望它看起来像这样（别介意时髦的背景）：

但我只能得到这样的结果：

在我的 LaTeX 文档中我这样调用：

\problems

下面是我用来产生上述（不令人满意的）结果的代码：

\RequirePackage{tikz}

\makeatletter 
    \pgfdeclareshape{topbot}{ 
    \inheritsavedanchors[from=rectangle] 
    \inheritanchorborder[from=rectangle] 
    \inheritanchor[from=rectangle]{center} 
    \inheritanchor[from=rectangle]{north} 
    \inheritanchor[from=rectangle]{south} 
    \inheritanchor[from=rectangle]{west} 
    \inheritanchor[from=rectangle]{east} 
    \inheritanchor[from=rectangle]{north east} 
    \inheritanchor[from=rectangle]{south east} 
    \inheritanchor[from=rectangle]{north west} 
    \inheritanchor[from=rectangle]{south west} 
    \inheritanchor[from=rectangle]{base} 
    \backgroundpath{% 
    \southwest \pgf@xa=\pgf@x \pgf@ya=\pgf@y 
    \northeast \pgf@xb=\pgf@x \pgf@yb=\pgf@y 
    \pgfpathmoveto{\pgfpoint{\pgf@xa}{\pgf@ya}} 
    \pgfpathlineto{\pgfpoint{\pgf@xa}{\pgf@yb}} %left hand vertical line
    \pgfpathmoveto{\pgfpoint{\pgf@xb}{\pgf@yb}} %top vertical line
    \pgfpathmoveto{\pgfpoint{\pgf@xa}{\pgf@ya}} 
    \pgfpathlineto{\pgfpoint{\pgf@xb}{\pgf@ya}} 
    \pgfpathclose 
        }% 
    } 
    \makeatother 

    \newcommand{\problems}{
        \begin{tikzpicture} 
        \node[draw,shape=topbot,very thick, minimum width=\paperwidth, text width=.8\paperwidth] 
        {\large\textbf{Problems for Section~\thesection}}; 
        \end{tikzpicture}}
        \titlespacing*{\problems}{-0.25in}{50pt}{0pt}

我试图制作矩形的左下角，然后使左侧变得非常厚。

另外，我希望矩形的宽度与页面宽度相同。（这不会被打印出来，因此我不太关心边距。）

Answer 1

这是一个不使用 TikZ 的解决方案，使用标题安全包装（我不确定水平线及其悬垂的长度，但您可以轻松更改尺寸）：

\documentclass{book}
\usepackage[explicit]{titlesec}
\usepackage{lipsum}

\newcommand\problems{
\begingroup
\titleformat{\chapter}[display]
  {\normalfont\large\filright\bfseries}{\Huge}{0pt}
  {\hspace*{-1.7cm}##1\vskip-6ex}[\hspace*{-3cm}\rlap{\rule{4ex}{4ex}\rule{\paperwidth}{2pt}}]
\titlespacing*{\chapter}{0pt}{50pt}{20pt}
  \chapter*{Problems for section~\thesection}
\endgroup
}

\begin{document}

\setcounter{chapter}{1}\setcounter{section}{1}% just for the example
\problems
\lipsum[1]

\end{document}

Answer 2

我认为，您可以在 TiKZ 中通过使用简单的\fill命令和使用相对坐标来最好地完成此操作，如下所示：

来源：

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{calc}

% Various lengths, vary to taste
\newlength\tablength        \setlength\tablength{20pt}
\newlength\ruledepth        \setlength\ruledepth{2pt}
\newlength\rulelength       \setlength\rulelength{0.95\textwidth}
\newlength\tabheight        \setlength\tabheight{0.25in} \addtolength\tabheight{-\ruledepth}
\newlength\raisetitle       \setlength\raisetitle{1ex}
\newlength\insettitle       \setlength\insettitle{1.5em}
\newlength\afterheadingskip \setlength\afterheadingskip{2ex}

\newcommand\problems{%
  \par\noindent
  \begin{tikzpicture}
    \node [inner sep=0pt] (title) at (0,0) {\bfseries Problems for Section~\thesection};
    \coordinate (inner corner) at ($(title.south west) + (-\insettitle,-\raisetitle)$);
    \coordinate (outer corner) at ($(inner corner) + (-\tablength,-\ruledepth)$);
    \fill [black] (outer corner) -- +(\rulelength,0) -- +(\rulelength,\ruledepth) 
                  -- (inner corner) -- +(0,\tabheight) -- +(-\tablength,\tabheight)
                  -- cycle;
  \end{tikzpicture}%
  \\[\afterheadingskip]}

\begin{document}
\problems Text immediately following the section heading.
\end{document}

结果：