双列模式下的标题包：图形和（宽）图形的不同样式*

Question

我正在使用基于 KOMA 脚本的双列布局，并使用包修改浮动标题caption。不幸的是，在重新定义默认样式时，新选项将同时应用于列宽figure和文本宽figure*。这会导致标题并不总是具有预期的宽度：

\documentclass[a4paper,twocolumn,DIV=16]{scrartcl}
\usepackage{blindtext}

\usepackage[
  justification=RaggedRight,
  width=.9\columnwidth,
]{caption}

\begin{document}


\blindtext
\begin{figure}[htpb]
  \rule{\columnwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is as intended.
  }
\end{figure}
\blindtext

\clearpage
\begin{figure*}[htpb]
  \rule{\textwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is too small.
  }
\end{figure*}
\clearpage

\captionsetup{
  justification=RaggedRight,
  width=.9\textwidth,
}

\blindtext
\begin{figure}[htpb]
  \rule{\columnwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is too large.
  }
\end{figure}
\blindtext

\clearpage
\begin{figure*}[htpb]
  \rule{\textwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is as intended.
  }
\end{figure*}
\clearpage

\end{document}

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我现在通过手动切换到通过\DeclareCaptionStyle{colfigure}{...}列图定义的单独样式来规避这个问题\captionsetup{style=colfigure}，但我不想手动执行此操作。有没有办法自动完成这个？

Answer 1

虽然该width=...选项会立即将标题的宽度设置为固定量，但calcwidth=...如果需要，则会在每次实际排版标题时评估该值。

因此，通常使用width=...全局选项不是一个好主意；在单个图形或表格中使用它（本地）选项更有意义。

因此，请尝试类似以下的方法calcwidth=.9\linewidth：

\documentclass[a4paper,twocolumn,DIV=16]{scrartcl}
\usepackage{blindtext}

\usepackage[
  justification=RaggedRight,
  calcwidth=.9\linewidth,
]{caption}

\begin{document}

\blindtext
\begin{figure}[htpb]
  \rule{\columnwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is as intended.
  }
\end{figure}
\blindtext

\clearpage
\begin{figure*}[htpb]
  \rule{\textwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is as intended.
  }
\end{figure*}

\end{document}

calcwidth=...于 2011/07/30随软件包 v3.2 引入caption，但仍未成为文档的一部分。（仅在文件中提及CHANGELOG。）另请参阅：https://gitlab.com/axelsommerfeldt/caption/issues/1

计划于今年年底推出包含完整修订文档的新版本 v3.4。

Answer 2

这里有一个建议，至少需要 KOMA-Script 版本 3.25，并且无需包即可工作caption。

\documentclass[a4paper,twocolumn,DIV=16]{scrartcl}[2018/03/30]% needs version 3.25 or newer
\usepackage{blindtext}

\setcaptionalignment{l}% needs version 3.25
\setcapdynwidth{.9\linewidth}% needs version 3.20

\begin{document}
\blindtext
\begin{figure}[htpb]
  \rule{\columnwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is as intended.
  }
\end{figure}
\blindtext

\clearpage
\begin{figure*}[htpb]
  \rule{\textwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is too small.
  }
\end{figure*}
\end{document}

结果：

或者使用包装ragged2e和标题对齐L：

\documentclass[a4paper,twocolumn,DIV=16]{scrartcl}[2018/03/30]% needs version 3.25 or newer
\usepackage{blindtext}

\usepackage{ragged2e}
\setcaptionalignment{L}% needs version 3.25
\setcapdynwidth{.9\linewidth}% needs version 3.20

\begin{document}
\blindtext
\begin{figure}[htpb]
  \rule{\columnwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is as intended.
  }
\end{figure}
\blindtext

\clearpage
\begin{figure*}[htpb]
  \rule{\textwidth}{2cm}
  \caption{A few words that consume more space than a single line.
    The width of this caption is too small.
  }
\end{figure*}
\end{document}

\documentclass{article} \begin{document} [ \left{ x\in\mathbf{R} \middle] 0<{|x|><\frac{5}{3} \right} ]

\结束{文档}

结果：