我正在使用 Tufte 类来处理包含大量图片的文档，我的一些读者抱怨说，找到不在页边距中的图片的标题并不总是那么容易。因此，我想定义（然后使用）宏变体，\caption在标题前面显示一个小三角形，指向图片。例如\captiondown{my caption}将显示“▼ 数字3：我的标题”。
我不清楚如何编写这样的宏。我以为我可以通过重新定义来实现这一点\figurename，但看下面的例子，它在环境中有效marginfigure，而不是在figure和figure*环境中。有人能帮忙吗？
\documentclass[a4paper,nobib]{tufte-handout}
\usepackage{amssymb}
\usepackage{tikz}
\usepackage{showframe}
\renewcommand{\figurename}{\textbf{Figure}}
\begin{document}
\begin{marginfigure}
\tikz\fill[cyan] rectangle(\marginparwidth,2);
\renewcommand{\figurename}{$\blacktriangle$~\textbf{Figure}}
\caption{Some caption for the blue figure.}
\end{marginfigure}
\begin{figure}
\tikz\fill[yellow]rectangle(\textwidth,4);
\renewcommand{\figurename}{$\blacktriangleleft$~\textbf{Figure}} %ignored?
\caption[][3cm]{Some caption for the yellow figure.}
\end{figure}
\begin{figure*}
\tikz\fill[magenta]rectangle(\textwidth,3);
\renewcommand{\figurename}{$\blacktriangledown$~\textbf{Figure}} %ignored?
\caption[][-4.5cm]{Some caption for the magenta figure.}
\end{figure*}
\end{document}
更新：
这是我重新定义的变体。如果我在and环境\fnum@figure之前重新定义该宏，我会得到所需的输出，所以我想我会用这个方法。figurefigure*
我仍然非常希望能够\captiondown{my caption}在这些环境中进行调用，但我不知道如何做到这一点。
\documentclass[a4paper,nobib]{tufte-handout}
\usepackage{amssymb}
\usepackage{tikz}
\usepackage{showframe}
\makeatletter
\newcommand{\captionsbelow}{%
\renewcommand{\fnum@figure}{$\blacktriangle$~\textbf{\figurename}~\thefigure}}
\newcommand{\captionsright}{%
\renewcommand{\fnum@figure}{$\blacktriangleleft$~\textbf{\figurename}~\thefigure}}
\newcommand{\captionsabove}{%
\renewcommand{\fnum@figure}{$\blacktriangledown$~\textbf{\figurename}~\thefigure}}
\makeatother
\begin{document}
\captionsbelow
\begin{marginfigure}
\tikz\fill[cyan] rectangle(\marginparwidth,2);
\caption{Some caption for the blue figure.}
\end{marginfigure}
\captionsright
\begin{figure}
\tikz\fill[yellow]rectangle(\textwidth,4);
\caption[][3cm]{Some caption for the yellow figure.}
\end{figure}
\captionsabove
\begin{figure*}
\tikz\fill[magenta]rectangle(\textwidth,3);
\caption[][-4.5cm]{Some caption for the magenta figure.}
\end{figure*}
\end{document}
最后更新：
使用我得到的所有输入，设法修补 Tufte 定义，以便根据图形的位置在每个浮点中重新定义方向。（我只是不关心正反面模式，我不使用它，但扩展它以支持它应该不是问题。）
\documentclass[a4paper,nobib]{tufte-handout}
\usepackage{showframe}
\usepackage{amssymb}
\usepackage{tikz}
\usepackage{etoolbox}
\makeatletter
\renewcommand{\fnum@figure}{\captiontriangle~\textbf{\figurename}~\thefigure}
\newcommand{\captionbelow}{\gdef\captiontriangle{$\blacktriangle$}}
\newcommand{\captionright}{\gdef\captiontriangle{$\blacktriangleleft$}}
\newcommand{\captionabove}{\gdef\captiontriangle{$\blacktriangledown$}}
% Use \captionbelow by default, for margin figures
\AtBeginDocument{\captionbelow}
\AfterEndEnvironment{@tufte@float}{\captionbelow}
% automatically change the triangle for other captions
\AtEndEnvironment{@tufte@float}{%
\ifthenelse{\boolean{@tufte@float@star}}%
{\ifthenelse{\equal{\floatalignment}{b}}{\captionabove}{\captionbelow}}%
{\captionright}}
\makeatother
\setcounter{totalnumber}{4}% for demonstration
\begin{document}
\begin{marginfigure}
\tikz\fill[cyan] rectangle(\marginparwidth,2);
\caption{Some caption for the blue figure.}
\end{marginfigure}
\begin{figure}
\tikz\fill[yellow]rectangle(\textwidth,4);
\caption[][3cm]{Some caption for the yellow figure.}
\end{figure}
\begin{figure*}
\tikz\fill[magenta]rectangle(\textwidth,3);
\setfloatalignment{b} %force caption above
\caption{Some caption for the magenta figure.}
\end{figure*}
\begin{figure*}
\tikz\fill[green!30]rectangle(\textwidth,3);
\caption[][-1.2em]{Some caption for the green figure.}
\end{figure*}
\begin{figure*}[b]
\tikz\fill[gray!30]rectangle(\textwidth,3);
\caption{Some caption for the gray figure.}
\end{figure*}
\end{document}
答案1
解决此问题的一个好方法是定义一个重置图形标签的命令。之后，在每个and环境之后使用\AfterEndEnvironment(from ) 执行此类命令。这样，您也许能够重新定义标题的外观，但在环境结束后仍能获得图形标题的原始定义。etoolboxfigurefigure*
\documentclass[a4paper,nobib]{tufte-handout}
\usepackage{amssymb}
\usepackage{tikz}
\usepackage{showframe}
\usepackage{etoolbox}
\makeatletter
\renewcommand{\fnum@figure}{\textbf{\figurename}~\thefigure}
% save older version of \fnum@figure
\let \fnum@figureold \fnum@figure
% define a command to reset to the older version
\newcommand{\resetfnumfigure}{\let \fnum@figure \fnum@figureold}
\makeatother
\AfterEndEnvironment{figure}{\resetfnumfigure}
\AfterEndEnvironment{figure*}{\resetfnumfigure}
\makeatletter
\newcommand{\captionsbelow}{%
\renewcommand{\fnum@figure}{$\blacktriangle$~\textbf{\figurename}~\thefigure}}
\newcommand{\captionsright}{%
\renewcommand{\fnum@figure}{$\blacktriangleleft$~\textbf{\figurename}~\thefigure}}
\newcommand{\captionsabove}{%
\renewcommand{\fnum@figure}{$\blacktriangledown$~\textbf{\figurename}~\thefigure}}
\makeatother
\begin{document}
\begin{marginfigure}
\captionsbelow
\tikz\fill[cyan] rectangle(\marginparwidth,2);
\caption{Some caption for the blue figure.}
\end{marginfigure}
\captionsright
\begin{figure}
\tikz\fill[yellow]rectangle(\textwidth,4);
\caption[][3cm]{Some caption for the yellow figure.}
\end{figure}
\captionsabove
\begin{figure*}
\tikz\fill[magenta]rectangle(\textwidth,3);
\caption[][-4.5cm]{Some caption for the magenta figure.}
\end{figure*}
\end{document}