用省略号突出显示表格中的数字

Question

我正在尝试弄清楚如何用圆圈（好吧，椭圆）突出显示表格中的数字，理想情况下不要使用 tikz 的大量开销。以下内容，只是我不知道如何1根据文本=数字的高度和宽度自动调整文本=数字周围的省略号的大小和位置；以及 [2] 如何不让它干扰表格列的对齐。这容易还是困难？一如既往地感谢建议。

\documentclass[12pt]{standalone}

\usepackage{ellipse}
\usepackage{color}

\setlength{\unitlength}{12pt}%

%% should not interfere with placement of number in table.
\newcommand{\enumber}[1]{
  \begin{picture}(0,0)
    \linethickness{1.5pt}%
    %% dimensions should be autosized (ideally, even height, but width is more important)
    %% location needs to be vertically centered
    \put(0,0.25){\color{red}\ellipse{2}{0.5}}%
    \put(0,0){\makebox[0mm][c]{#1}}
  \end{picture}
}


\begin{document}

\begin{tabular}{lcr}
  Left & Center & Right \\
  \hline
  12.0 & 22.0   & 32.0 \\
  1212.0 & 2222.0   & 3232.0 \\
  \enumber{12.0} & 22.0   & 32.0 \\
  1212.0 & \enumber{2222.0}   & 3232.0 \\
  1212.0 & 2222.0   & \enumber{3232.0} \\
\end{tabular}

\end{document}

Answer 1

这很简单。诀窍是使用overlay和适当的，inner sep以免干扰列对齐。

要获得纯picture模式解决方案，请等待大卫卡莱尔。

\documentclass[12pt, border=10pt]{standalone} 
\usepackage{tikz} 
\usetikzlibrary{fit}
\usetikzlibrary{shapes}
\setlength{\unitlength}{12pt} 
\newcommand{\enumber}[1]{%
    \begin{tikzpicture}[remember picture]
        \node[inner sep=0pt](a){#1};
    \end{tikzpicture}%
    \begin{tikzpicture}[overlay, remember picture]
        \node[draw, red, fit=(a), ellipse, inner sep=1pt, line width=1.5pt]{};
    \end{tikzpicture}%
    }
\begin{document} 
\begin{tabular}{lcr} 
    Left & Center & Right \\ 
    \hline 
    12.0 & 22.0 & 32.0 \\ 
    1212.0 & 2222.0 & 3232.0 \\ 
    \enumber{12.0} & 22.0 & 32.0 \\ 
    1212.0 & \enumber{2222.0} & 3232.0 \\ 
    1212.0 & 2222.0 & \enumber{3232.0} \\ 
\end{tabular} 
\end{document}

Answer 2

我为此使用纯 TikZ。

\documentclass[tikz,border=5mm]{standalone}
\begin{document}
\begin{tikzpicture}[xscale=2,yscale=.8]
\path
(0,1) node[right]{Left}
(0,0)  node[right]{1}
(0,-1) node[right]{123} 
(0,-2) node[right]{12345} 

(1,1) node{Center}
(1,0)  node{234} 
(1,-1) node{45678} 
(1,-2) node{1} 

(2,1) node[left=0]{Right}
(2,0)  node[left=0]{6789}
(2,-1) node[left=0]{89}
(2,-2) node[left=0]{789};

% customizing ellipse as needed
\draw[red,thick] 
(0,0)+(0:.3) arc(0:360:.2 and .25)
(1,-1)+(0:.35) arc(0:360:.35 and .28)
(2,-2)+(0:.1) arc(0:360:.3 and .25); 
\draw (-.25,.5)--+(0:2.5);
\end{tikzpicture}
\end{document}