使用单行检查右对齐标题

Question

我使用singlelinecheck=true该caption包将小标题居中。但是，我还希望能够将单行标题左对齐或右对齐。通过以下方法可以将它们左对齐

\captionsetup{singlelinecheck=false}%

正如我在图 1 中所做的那样。如果标题更长，在这种情况下一切仍然有效。

如何使图 2 的单行标题右对齐（但前提是它是单行标题）？

代码：

\documentclass{article}
\usepackage{showframe}
\usepackage{graphicx}

\usepackage{caption}
\captionsetup{%
    format=plain,%
    textformat=period,
    justification=RaggedRight,
    singlelinecheck=true,
}%

\begin{document}
\noindent
\begin{minipage}{0.5\linewidth}
    \centering
    \includegraphics[width=0.95\linewidth]{example-image}%
    \captionsetup{width=0.95\linewidth}%
    \captionsetup{singlelinecheck=false}%
    \captionof{figure}{Caption on Left}%
\end{minipage}%
\begin{minipage}{0.5\linewidth}
    \centering
    \includegraphics[width=0.95\linewidth]{example-image}%
    \captionsetup{width=0.95\linewidth}%
    \captionof{figure}{Caption on Right}%
\end{minipage}%

\medskip\noindent
\begin{minipage}[t]{0.5\linewidth}
    \centering
    \includegraphics[width=0.95\linewidth]{example-image}%
    \captionsetup{width=0.95\linewidth}%
    \captionof{figure}{Caption Centered}%
\end{minipage}%
\begin{minipage}[t]{0.5\linewidth}
    \centering
    \includegraphics[width=0.95\linewidth]{example-image}%
    \captionsetup{width=0.95\linewidth}%
    \captionof{figure}{Caption taking up full width}%
\end{minipage}%
\end{document}

Answer 1

您可以使用可选参数\DeclareCaptionStyle来定义单行标题的特殊行为，以用于自己的标题样式：

\documentclass{article}
\usepackage{showframe}
\usepackage{graphicx}

\usepackage{caption}

\DeclareCaptionStyle{mystyle}
  {format=plain,%
    textformat=period,
    justification=RaggedRight,
    singlelinecheck=true,
  }% all captions are left aligned

\DeclareCaptionStyle{singlelinecentered}
  [justification=Centering]% centered if single line and no `singlelinecheck=false`
  {style=mystyle}% other captions are left aligned

\DeclareCaptionStyle{singlelineraggedleft}
  [justification=RaggedLeft]% right aligned if single line and no `singlelinecheck=false`
  {style=mystyle}% other captions are left aligned

\captionsetup{style=singlelineraggedleft}

\begin{document}
\noindent
\begin{minipage}{0.5\linewidth}
    \centering
    \includegraphics[width=0.95\linewidth]{example-image}%
    \captionsetup{width=0.95\linewidth}%
    \captionsetup{singlelinecheck=false}%
    \captionof{figure}{Caption on Left}%
\end{minipage}%
\begin{minipage}{0.5\linewidth}
    \centering
    \includegraphics[width=0.95\linewidth]{example-image}%
    \captionsetup{width=0.95\linewidth}%
    \captionof{figure}{Caption on Right}%
\end{minipage}%

\medskip\noindent
\begin{minipage}[t]{0.5\linewidth}
    \centering
    \includegraphics[width=0.95\linewidth]{example-image}%
    \captionsetup{width=0.95\linewidth,style=singlelinecentered}%
    \captionof{figure}{Caption Centered}%
\end{minipage}%
\begin{minipage}[t]{0.5\linewidth}
    \centering
    \includegraphics[width=0.95\linewidth]{example-image}%
    \captionsetup{width=0.95\linewidth}%
    \captionof{figure}{Caption taking up full width}%
\end{minipage}%
\end{document}

Answer 2

一个简单的解决方案floatrow：

\documentclass{article}
\usepackage{showframe}
\usepackage{graphicx}
\usepackage{floatrow, caption}

\captionsetup{%
    format=plain,%
    textformat=period,
    justification=RaggedRight,
    singlelinecheck=true,
}%
\renewcommand\ShowFrameLinethickness{0.3pt}

\begin{document}

\begin{figure}[!htb]
\centering\floatsetup{floatrowsep=qquad}
\captionsetup{font=small}
\begin{floatrow}\captionsetup{singlelinecheck=false}
    \ffigbox[\FBwidth]{%
    \includegraphics[width=0.4\textwidth]{example-image}}%
    {\caption{Caption on Left}}%
%%%
    \ffigbox[\FBwidth]{%
    \includegraphics[width=0.4\textwidth]{example-image}}%
    {\captionsetup{justification=raggedleft}\caption[]{Caption on Right}}%
\end{floatrow}%
\par
\vspace{3ex}
%%%%%%
\begin{floatrow}
    \ffigbox[\FBwidth]{%
 \includegraphics[width=0.4\textwidth]{example-image}}%
 { \caption{Caption Centered}}%
 %%%
    \ffigbox[\FBwidth]{%
 \includegraphics[width=0.4\textwidth]{example-image}}%
 {\captionsetup{format=hang}\caption[]{Long caption taking up full width}}%
\end{floatrow}%
\end{figure}

\end{document}