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圆角矩形与 tikzpicture：椭圆形不是圆形

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圆角矩形与 tikzpicture：椭圆形不是圆形

这是我的 MWE：

\documentclass{book}
\usepackage{lipsum}
\usepackage{fmtcount}
\FCloadlang{ngerman}
\usepackage[many]{tcolorbox}
\usepackage{calc}
\usetikzlibrary{positioning,shapes.misc,calc}
\usepackage[scale=1,angle=0,opacity=1]{background}
\usepackage{ifthen}
\usepackage{xcolor}

\definecolor{mp}{RGB}{240,240,240}

\SetBgScale{1}
\SetBgAngle{0}
\SetBgOpacity{1}
\SetBgContents{}

\newcounter{partshift}
\addtocounter{partshift}{-1}
\newcommand{\maxpart}{9}

\makeatletter
  \newcommand{\parttitle}{}
  \def\@part[#1]#2{%
    \renewcommand{\parttitle}{#1}\pf
      \ifnum \c@secnumdepth >-2\relax
        \refstepcounter{part}%
        \addcontentsline{toc}{part}{\bfseries\color{gray}\Ordinalstring{part}~\partname:\hspace{0.5em}#1}%
      \else
        \addcontentsline{toc}{part}{#1}%
      \fi
      \markboth{}{}%
      {\centering
       \interlinepenalty \@M
       \normalfont
       \ifnum \c@secnumdepth >-2\relax
         \huge\Ordinalstring{part}\nobreakspace\partname
         \par
         \vskip 20\p@
       \fi
       \bfseries\color{gray}\fontsize{28}{30}\selectfont #2\par}%
      \@endpart}

\newcommand\pf{%
  \AddEverypageHook{%
    \ifthenelse{\isodd{\thepage}}
    {\SetBgContents{%
      \begin{tikzpicture}[overlay,remember picture]
      \node[
                fill=mp,
                inner sep=0pt,
                rounded rectangle,
                text width=5mm,
        text height=\paperheight/\maxpart,
                align=center,
                anchor=north east] at
                    ($ (current page.north east) + (1mm,-\thepartshift*\paperheight/\maxpart) $){};
      \end{tikzpicture}}%
    }
    {\SetBgContents{%
      \begin{tikzpicture}[overlay,remember picture]
      \node[
                fill=mp,
                inner sep=0pt,
                rounded rectangle,
                text width=5mm,
        text height=\paperheight/\maxpart,
                align=center,
                anchor=north west] at 
                    ($ (current page.north west) + (-1mm,-\thepartshift*\paperheight/\maxpart) $){};
      \end{tikzpicture}}
    }
    \bg@material}%
    \stepcounter{partshift}
}
\makeatother

\begin{document}

\part{A}
\chapter{a1}

\part{B}
\chapter{b1}
\lipsum[1-7]

\part{C}
\chapter{c1}
\lipsum[1-7]

\end{document}

在此处输入图片描述

我想让它看起来是正确的

在此处输入图片描述

我怎样才能做到这一点？

答案1

您可以使用

            rectangle,
            rounded corners=2ex,  %% adjust 2ex

得到它。我还增加了最小宽度和坐标，如下所示

 minimum width=1cm,
 .
 .
 anchor=north east] at
                ($ (current page.north east) + (5mm,-\thepartshift*\paperheight/\maxpart) $){};

注意5mm和-5mm（在偶数页）。您可以相应地调整这些值。

\documentclass{book}
\usepackage{lipsum}
\usepackage{fmtcount}
\FCloadlang{ngerman}
\usepackage[many]{tcolorbox}
\usepackage{calc}
\usetikzlibrary{positioning,shapes.misc,calc}
\usepackage[scale=1,angle=0,opacity=1]{background}
\usepackage{ifthen}
\usepackage{xcolor}

\definecolor{mp}{RGB}{240,240,240}

\SetBgScale{1}
\SetBgAngle{0}
\SetBgOpacity{1}
\SetBgContents{}

\newcounter{partshift}
\addtocounter{partshift}{-1}
\newcommand{\maxpart}{9}

\makeatletter
  \newcommand{\parttitle}{}
  \def\@part[#1]#2{%
    \renewcommand{\parttitle}{#1}\pf
      \ifnum \c@secnumdepth >-2\relax
        \refstepcounter{part}%
        \addcontentsline{toc}{part}{\bfseries\color{gray}\Ordinalstring{part}~\partname:\hspace{0.5em}#1}%
      \else
        \addcontentsline{toc}{part}{#1}%
      \fi
      \markboth{}{}%
      {\centering
       \interlinepenalty \@M
       \normalfont
       \ifnum \c@secnumdepth >-2\relax
         \huge\Ordinalstring{part}\nobreakspace\partname
         \par
         \vskip 20\p@
       \fi
       \bfseries\color{gray}\fontsize{28}{30}\selectfont #2\par}%
      \@endpart}

\newcommand\pf{%
  \AddEverypageHook{%
    \ifthenelse{\isodd{\thepage}}
    {\SetBgContents{%
      \begin{tikzpicture}[overlay,remember picture]
      \node[
                fill=mp,
                inner sep=0pt,
                rectangle,
                rounded corners=2ex,
                text width=5mm,
                minimum width=1cm,
        text height=\paperheight/\maxpart,
                align=center,
                anchor=north east] at
                    ($ (current page.north east) + (5mm,-\thepartshift*\paperheight/\maxpart) $){};
      \end{tikzpicture}}%
    }
    {\SetBgContents{%
      \begin{tikzpicture}[overlay,remember picture]
      \node[
                fill=mp,
                inner sep=0pt,
                rectangle,
                rounded corners=2ex,
                text width=5mm,
                minimum width=1cm,
        text height=\paperheight/\maxpart,
                align=center,
                anchor=north west] at
                    ($ (current page.north west) + (-5mm,-\thepartshift*\paperheight/\maxpart) $){};
      \end{tikzpicture}}
    }
    \bg@material}%
    \stepcounter{partshift}
}
\makeatother

\begin{document}

\part{A}
\chapter{a1}

\part{B}
\chapter{b1}
\lipsum[1-7]

\part{C}
\chapter{c1}
\lipsum[1-7]

\end{document}

在此处输入图片描述

答案2

这是一个不需要猜测长度并绘制所需形状的解决方案（其他答案只是绘制了一个完整的矩形，但其中一半超出了页面）。此解决方案还使用了background包的新语法：

\documentclass{book}
\usepackage{lipsum}
\usepackage{fmtcount}
\FCloadlang{ngerman}
\usepackage[many]{tcolorbox}
\usepackage{calc}
\usetikzlibrary{positioning,shapes.misc,calc}
\usetikzlibrary{chains,qrr.shapes.openrectangle}
\usepackage[scale=1,angle=0,opacity=1,contents={}]{background}
\usepackage{xcolor}

\definecolor{mp}{RGB}{240,240,240}

\newcounter{partshift}
\addtocounter{partshift}{-1}
\newcommand{\maxpart}{9}

\makeatletter
  \newcommand{\parttitle}{}
  \def\@part[#1]#2{%
    \renewcommand{\parttitle}{#1}\pf
      \ifnum \c@secnumdepth >-2\relax
        \refstepcounter{part}%
        \addcontentsline{toc}{part}{\bfseries\color{gray}\Ordinalstring{part}~\partname:\hspace{0.5em}#1}%
      \else
        \addcontentsline{toc}{part}{#1}%
      \fi
      \markboth{}{}%
      {\centering
       \interlinepenalty \@M
       \normalfont
       \ifnum \c@secnumdepth >-2\relax
         \huge\Ordinalstring{part}\nobreakspace\partname
         \par
         \vskip 20\p@
       \fi
       \bfseries\color{gray}\fontsize{28}{30}\selectfont #2\par}%
      \@endpart}

\newcommand\pf{%
\AddEverypageHook{%
  \ifodd\value{page}\relax
  \backgroundsetup{contents={%
      \begin{tikzpicture}[overlay,remember picture]
      \node[
                shape=open rectangle,
                rounded corners=20pt,
                open rectangle fill=mp,
                open rectangle sides=nws,
                align=center,
                inner sep=0pt,
                text width=10mm,
                text height=\paperheight/\maxpart,
                anchor=north east,
                ] at
                    ( $ (current page.north east) + (1mm,-\thepartshift*\paperheight/\maxpart) $){};
      \end{tikzpicture}}}%
    \else
  \backgroundsetup{contents={%
      \begin{tikzpicture}[overlay,remember picture]
      \node[
                shape=open rectangle,
                rounded corners=20pt,
                open rectangle fill=mp,
                open rectangle sides=ens,
                text width=10mm,
                text height=\paperheight/\maxpart,
                align=center,
                anchor=north west
                ] at 
                    ($ (current page.north west) + (-1mm,-\thepartshift*\paperheight/\maxpart) $){};
      \end{tikzpicture}}}
    \fi  
    \BgMaterial}%
    \stepcounter{partshift}
}
\makeatother

\begin{document}

\part{A}
\chapter{a1}

\part{B}
\chapter{b1}
\lipsum[1-7]

\part{C}
\chapter{c1}
\lipsum[1-7]

\end{document}

在此处输入图片描述

代码使用了以下库：

作者奎伯比尔贝尔。

按照链接下载文件并将其保存在 TeX 可以找到的地方（当前工作目录是最简单的地方）。

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