有谁知道有哪个 LaTeX 包可以实现类似以下倒计时计数器的可视化计数器吗？这个上下文模块? 它生成如下图像：
然而，我愿意坚持使用 LaTeX 和beamer，因此如果有人使用过/破解过类似的东西，我将不胜感激任何参考。
我知道进度条主题，但我想在自己的主题中添加这样的圆形进度条。
答案1
如果只是想绘制它，您可能需要检查一下。我刚刚修复了一些问题（现在它会检查给定的参数，并在必要时发出警告）。
\documentclass{article}
\usepackage[a6paper]{geometry}
\usepackage{tikz}
\usetikzlibrary{calc}
\makeatletter
\newcommand\statuslabel[3][]{%
\def\scale{#1}
\ifx\scale\empty\def\scale{1}\fi
\let\no\relax
\let\n\relax
\newcommand \no {#2}
\newcommand \n {#3}
\def \colorbef {blue}
\def \colorat {orange}
\def \coloraft {black!40}
\let\stop\relax
\sbox\z@{\@tempcnta=0\no\relax}\ifdim\wd0>\z@\relax\@latex@warning{Not a number (\#2): \no}\def\stop{1}\fi
\sbox\z@{\@tempcnta=0\n\relax}\ifdim\wd0>\z@\relax\@latex@warning{Not a number (\#3): \n}\def\stop{1}\fi
\ifx\stop\relax
\ifnum\no>\n\@latex@warning{Wrong parameter order?}\def\stop{1}\fi
\fi
\ifx\stop\relax
\else
\def \no {1}
\def \n {1}
\def \colorat {red}
\def \stop {??}
\fi
\begin{tikzpicture}[scale=0.1*\scale]
\def \radiusout {2cm}
\def \radiusin {1.3cm}
\ifnum\n=1
\def \margin {0}
\else
\def \margin {25/\n}
\fi
\foreach \s in {1,...,\n}
{
\node[circle, scale=\scale] at (0,0) {\tiny\stop};
\fill[\ifnum\s>\no\coloraft\relax\else\ifnum\s<\no\colorbef\else\colorat\fi\fi]
({90-360/\n * (\s - 1)-\margin}:\radiusout) arc ({90-360/\n * (\s - 1)-\margin}:{90-360/\n * (\s)+\margin}:\radiusout) --
({90-360/\n * (\s)+\margin}:\radiusin) arc ({90-360/\n * (\s)+\margin}:{90-360/\n * (\s - 1)-\margin}:\radiusin);
}
\end{tikzpicture}
}
\makeatother
\begin{document}
2/8: \statuslabel{2}{8}
6/6: \statuslabel{6}{6}
4/22: \statuslabel{4}{22}
1/1: \statuslabel{1}{1}
4/2 warning and off: \statuslabel{4}{2}
3/7 scale 2x: \statuslabel[2]{3}{7}
\end{document}
您还可以创建一个枚举环境（有点黑客的方式）：
\documentclass{article}
\usepackage[a6paper]{geometry}
\usepackage{enumitem}
\usepackage{refcount}
\usepackage{tikz}
\usetikzlibrary{calc}
\makeatletter
\newcommand\statuslabel[3][]{%
\def\scale{#1}
\ifx\scale\empty\def\scale{1}\fi
\let\no\relax
\let\n\relax
\newcommand \no {#2}
\newcommand \n {#3}
\def \colorbef {blue}
\def \colorat {orange}
\def \coloraft {black!40}
\let\stop\relax
\sbox\z@{\@tempcnta=0\no\relax}\ifdim\wd0>\z@\relax\@latex@warning{Not a number (\#2): \no}\def\stop{1}\fi
\sbox\z@{\@tempcnta=0\n\relax}\ifdim\wd0>\z@\relax\@latex@warning{Not a number (\#3): \n}\def\stop{1}\fi
\ifx\stop\relax
\ifnum\no>\n\@latex@warning{Wrong parameter order?}\def\stop{1}\fi
\fi
\ifx\stop\relax
\else
\def \no {1}
\def \n {1}
\def \colorat {red}
\def \stop {??}
\fi
\begin{tikzpicture}[scale=0.1*\scale]
\def \radiusout {2cm}
\def \radiusin {1.3cm}
\ifnum\n=1
\def \margin {0}
\else
\def \margin {25/\n}
\fi
\foreach \s in {1,...,\n}
{
\node[circle, scale=\scale] at (0,0) {\tiny\stop};
\fill[\ifnum\s>\no\coloraft\relax\else\ifnum\s<\no\colorbef\else\colorat\fi\fi]
({90-360/\n * (\s - 1)-\margin}:\radiusout) arc ({90-360/\n * (\s - 1)-\margin}:{90-360/\n * (\s)+\margin}:\radiusout) --
({90-360/\n * (\s)+\margin}:\radiusin) arc ({90-360/\n * (\s)+\margin}:{90-360/\n * (\s - 1)-\margin}:\radiusin);
}
\end{tikzpicture}
}
\makeatother
\makeatletter
\newcounter{myenum} % to create unique labels
\newenvironment{myenum}
{\stepcounter{myenum}
\edef\nref{\getrefnumber{myenum@\arabic{myenum}}}
\edef\nref{\expandafter\@firstofone\nref}
\begin{enumerate}[
label=\protect\statuslabel{\arabic*}{\nref},
ref=\arabic*]}
{\label{myenum@\arabic{myenum}}%
\end{enumerate}}
\makeatother
\begin{document}
\begin{myenum}
\item example
\item example
\item example
\end{myenum}
\end{document}
参考：
答案2
Beamer 中的解决方案（灵感来自@masu 回答，但按顺时针方向递增）。
它实际上既可以在 Beamer 中使用，也可以在非演示文档中使用：用户可以根据需要通过 键选择一个或另一个选项beamer。通常将其设置为 false，以允许选择current和total value参数。当 时beamer=true，后者参数将被 Beamer 设置\insertframenumber和覆盖\inserttotalframenumber。
\documentclass{beamer}
\usepackage{lmodern}
\usepackage{tikz}
\usetikzlibrary{calc}
\setbeamertemplate{navigation symbols}{}
\makeatletter
\newif\ifbeamer%
\pgfkeys{/visual counter/.cd,
thickness/.store in=\thickness,
thickness=0.4ex,
radius/.store in=\radius,
radius=1.5ex,
segment distance/.store in=\segdist,
segment distance=8,
color current frame/.store in=\colcurrframe,
color current frame=orange,
color old frame/.store in=\cololdframe,
color old frame=blue,
color next frame/.store in=\colnextframe,
color next frame=gray!30,
current value/.store in=\currentv,
current value=1,
total value/.store in=\totalv,
total value=5,
beamer/.is if=beamer,
beamer/.default=false,
countdown/.code={
\begin{tikzpicture}[fill color/.style={}]
\ifbeamer
\pgfkeys{/visual counter/.cd,
current value=\insertframenumber,
total value=\inserttotalframenumber,
}
\fi
\def\current{\currentv}
\def\tot{\totalv}
\def\radiusout{\radius}
\def\radiusin{\radius-\thickness}
\foreach \s[] in {1,...,\tot}
{
\ifnum\s>\current%
\tikzset{fill color/.append style={\colnextframe}}%
\fi%
\ifnum\s=\current%
\tikzset{fill color/.append style={\colcurrframe}}%
\fi%
\ifnum\s<\current%
\tikzset{fill color/.append style={\cololdframe}}%
\fi%
\fill[fill color]
({90-360/\tot * (\s - 1)-\segdist}:\radiusout) arc
({90-360/\tot * (\s - 1)-\segdist}:{90-360/\tot * (\s)+\segdist}:\radiusout) --
({90-360/\tot * (\s)+\segdist}:\radiusin) arc
({90-360/\tot * (\s)+\segdist}:{90-360/\tot * (\s - 1)-\segdist}:\radiusin);
}
\end{tikzpicture}
}
}
\newcommand{\setvcoptions}[1]{
\pgfkeys{/visual counter/.cd,#1}
}
\newcommand{\addvisualcounter}{%
\tikz\node[/visual counter/.cd, beamer=true,countdown]{};
}
% new footline with
\setbeamertemplate{footline}{
\begin{beamercolorbox}[wd=0.95\textwidth, ht=2ex,dp=1ex,sep=1ex]{footline}
\hfill%
\addvisualcounter
\end{beamercolorbox}
}
\makeatother
% Let's change some options:
\setvcoptions{
segment distance=9,
thickness=0.5ex
}
\begin{document}
\begin{frame}{Title}
bla bla bla
\begin{center}
\begin{tikzpicture}
\node[/visual counter/.cd,
current value=3, total value=8,
radius=1.5cm, thickness=0.5cm,color current frame=green!80!black,countdown] at (0,0){};
\end{tikzpicture}
\end{center}
\end{frame}
\begin{frame}{Something else}
This uses the ``beamer'' option so no need to explicitly set the counters:
\begin{center}
\begin{tikzpicture}[yshift=3cm]
\node[/visual counter/.cd, radius=1.25cm, thickness=0.25cm,
beamer=true,
color current frame=green!80!black,
color old frame=magenta!80!violet,
countdown] at (0,0){};
\end{tikzpicture}
\end{center}
\end{frame}
\begin{frame}{Different title}
bla bla bla
\begin{center}
\begin{tikzpicture}
\node[/visual counter/.cd, radius=1cm, thickness=0.1cm,
color current frame=cyan!70!blue,
color old frame=magenta!80!violet,
color next frame=orange!50,
current value=6,
total value=24,
countdown] at (0,0){};
\end{tikzpicture}
\end{center}
\end{frame}
\begin{frame}{Another one}
bla bla bla
\begin{center}
\begin{tikzpicture}
\node[/visual counter/.cd, radius=1.25cm, thickness=0.5cm,
color current frame=red!70!orange,
color old frame=red!70!black,
color next frame=orange!80,
segment distance=3,
current value=6,
total value=10,
countdown] at (0,0){};
\end{tikzpicture}
\end{center}
\end{frame}
\begin{frame}{Final}
bla bla bla
\begin{center}
\begin{tikzpicture}
\node[/visual counter/.cd, radius=1.25cm, thickness=0.25cm,
color current frame=red!70!orange,
color old frame=red!70!black,
beamer=true,
countdown] at (0,0){};
\end{tikzpicture}
\end{center}
\end{frame}
\end{document}
结果：
答案3
这只是 PSTricks 的乐趣，并不是完整的解决方案。其余部分应该很容易添加。
\documentclass[pstricks,border=12pt]{standalone}
\usepackage{multido}
\SpecialCoor
\psset{linewidth=.5}
\def\Atom#1#2{%
\multido{\i=0+1}{#1}{%
\psarcn[linecolor=#2](0,0){1.5}{!115 \i\space 60 mul sub}{!65 \i\space 60 mul sub}}}
\begin{document}
\multido{\i=0+1}{7}{%
\begin{pspicture}(-2,-2)(2,2)
\Atom{6}{lightgray}
\Atom{\i}{blue}
\end{pspicture}}
\end{document}
