使 tikzpicture 相对于页面（标题页）垂直居中

2024-5-26 • tag-icon

在下面的 MWE 中，我必须手动偏移 tikzpicture 以使其相对于页面垂直居中对齐。有没有办法让它自动执行此操作？如果 tikzpicture 的长度发生变化，定位也会发生变化。

\documentclass{article}

\usepackage{tikz}
\usetikzlibrary{positioning,calc}

\def\titlineoffset{1.5}
\def\titlineabove{1.5}
\def\titlinebelow{3}

\newcounter{lastitlenode}\setcounter{lastitlenode}{1}   %
\NewDocumentCommand{\addtitele}{ O{1.0} O{\normalfont} D(){} m }{%  TODO figure out how to get away without needing node names in (), it throws an error
  \stepcounter{lastitlenode}
  \node[font={#2}, below=#1 of lastnode.south west, anchor=north west] (\IfValueTF{#3}{#3}{lastnode\thelastitlenode}) {#4};
  \coordinate (lastnode) at (\IfValueTF{#3}{#3}{lastnode\thelastitlenode}.south west);
}
\NewDocumentCommand{\setlastnode}{m}{%
  \coordinate (lastnode) at (#1.south west);
}



\def\maketitle{\begin{titlepage}%
\begin{tikzpicture}[overlay,remember picture,
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  shift={($(current page.west)+(5.8, 7.0)$)}, anchor=west,  % <-------- RIGHT HERE. If 
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%  I have to manually off-set the y-shift \
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% I want it such that if I change the 7.0 to zero, the picture is centered vertically
  node distance=1cm,
  every node/.style={anchor=west,inner sep=0pt,align=left},]
  \node[font={\LARGE\bfseries}] (title) {title\\title\\}; \setlastnode{title}
  \addtitele[1][\itshape](sub){subtitle\\sub\\sub}
  \addtitele[0.5][\itshape\bfseries](deg){Master of Science}
  \addtitele[0.5][\itshape](by){by}
  \addtitele[1][\Large\bfseries](auth){author}
  \addtitele[1.5](publi){publishers}
  \addtitele[2.5](date){date}
  \draw ($(title.north west)+(-\titlineoffset,\titlineabove)$) |- ($(lastnode.south west)+(-\titlineoffset,-\titlinebelow)$);
\end{tikzpicture}%
\end{titlepage}%
\clearpage
}


\begin{document}

\maketitle

\section{Hello world}

\end{document}

我希望 tikzpicture 的中心以页面为中心作为我的参考，并且如果需要的话允许从那里进行 y 偏移。

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