Receiving a wrong output from ref when ContinuedFloat is involved

Question

I get my custom numbering scheme in captions in the following form:

Figure A.1.5

the "5" is the chapter counter,

the "1" is the figure counter,

and the "A" is the counter for the ContinuedFloat.
 documentclass[12pt]{book}
 usepackage[colorlinks]{hyperref}
 usepackage{cleveref}
 usepackage{graphicx}

usepackage{caption}

captionsetup[figure]{labelsep=period,font=small,labelfont=small}

renewcommandthefigure{arabic{figure}.thechapter}

renewcommandtheContinuedFloat{Alph{ContinuedFloat}.}

DeclareCaptionLabelFormat{MyFormat}{#1 theContinuedFloat arabic{figure}.thechapter}
 captionsetup[ContinuedFloat]{labelformat=MyFormat}

begin{document}
 setcounter{chapter}{4}
 chapter{Chapter five}
 section{Section one}
 begin{figure}[!ht]
 ContinuedFloat*
 centering
 includegraphics[scale=.25]{example-image}
 caption{This is my caption}
 label{fig:A:1:5}
 end{figure}

begin{figure}[!ht]
 ContinuedFloat
 centering
 includegraphics[scale=.25]{example-image}
 caption{This is my caption}
 label{fig:B:1:5}
 end{figure}

we have in ref{fig:A:1:5} that ref{fig:B:1:5}
 end{document}

When I reference the same ones through the command of ref, I weirdly get "1.5A." instead of "A.1.5".
I don't want to use subcaption package.

Marijn · Accepted Answer

The manual of the caption package states that (emphasis mine):

If you would like to use the ContinuedFloat counter for the
references, too, you could redefine the command theContinuedFloat
instead, which will be appended to the figure or table counter
automatically in continued floats and is preset to be empty.

So, the ContinuedFloat counter is appended, i.e., added at the end, of the counter for referencing purposes, resulting in the 1.5A. behavior that you have noticed.
You can change this by redefining the command in the caption package that implements this behavior. Instead of putting the ContinuedFloat counter at the end you can put it at the beginning, so the reference format will match your own CaptionLabelFormat. The source is found in caption.sty at about 1/3 of the code. In the MWE below the line causing the issue is commented out and a new line is added below that to implement the reverse order.
MWE:
documentclass[12pt]{book}
usepackage[colorlinks]{hyperref}
usepackage{cleveref}
usepackage{graphicx}

usepackage{caption}
makeatletter
renewcommand*caption@@@@continuedfloat[1]{%
  caption@setoptions{ContinuedFloat}% for compatibility reasons
  caption@setoptions{continuedfloat}%
  caption@setoptions{continued#1}%
  %expandafterl@addto@macrocsname the#1endcsnamethecontinuedfloat
  expandafterdefcsname the#1endcsname{Alph{ContinuedFloat}.arabic{#1}.thechapter}
  @ifundefined{theH#1}{}{%
    expandafterl@addto@macrocsname theH#1endcsname{%
      @alphc@continuedfloat}}%
  letcaption@@@@continuedfloat@gobble}
makeatother
captionsetup[figure]{labelsep=period,font=small,labelfont=small}

renewcommandthefigure{arabic{figure}.thechapter}

renewcommandtheContinuedFloat{Alph{ContinuedFloat}.}

DeclareCaptionLabelFormat{MyFormat}{#1 theContinuedFloat arabic{figure}.thechapter}
captionsetup[ContinuedFloat]{labelformat=MyFormat}

begin{document}
setcounter{chapter}{4}
chapter{Chapter five}
section{Section one}
begin{figure}[!ht]
ContinuedFloat*
centering
includegraphics[scale=.25]{example-image}
caption{This is my caption}
label{fig:A:1:5}
end{figure}

begin{figure}[!ht]
ContinuedFloat
centering
includegraphics[scale=.25]{example-image}
caption{This is my caption}
label{fig:B:1:5}
end{figure}

begin{figure}[!ht]
centeringfbox{non-continued figure}
caption{some figure}
label{somefig}
end{figure}

we have in ref{fig:A:1:5} that ref{fig:B:1:5}

regular figure: ref{somefig}
end{document}

Result:

John Kormylo · Answer

Alternatively, one can modify label to store something other than thefigure.
 documentclass[12pt]{book}
 usepackage[colorlinks]{hyperref}
 usepackage{cleveref}
 usepackage{graphicx}

usepackage{caption}

captionsetup[figure]{font=small,labelfont=small}

renewcommandthefigure{arabic{figure}.thechapter}

DeclareCaptionLabelFormat{MyFormat}{#1 Alph{ContinuedFloat}.thefigure}
 captionsetup[ContinuedFloat]{labelformat=MyFormat}

makeatletter
newcommand{mylabel}{edef@currentlabel{Alph{ContinuedFloat}.thefigure}label}
makeatother

begin{document}
 setcounter{chapter}{4}
 chapter{Chapter five}
 section{Section one}
 begin{figure}[!ht]
 ContinuedFloat*
 centering
 includegraphics[scale=.25]{example-image}
 caption{This is my caption}
 mylabel{fig:A:1:5}
 
 end{figure}

begin{figure}[!ht]
 ContinuedFloat
 centering
 includegraphics[scale=.25]{example-image}
 caption{This is my caption}
 mylabel{fig:B:1:5}
 end{figure}

we have in ref{fig:A:1:5} that ref{fig:B:1:5}
 end{document}

user205700 · Answer

Answer code taken from Marijn but modified so only documented features of the caption package are used. This one does not redefine theContinuedFloat but declares an option instead to modify thefigure for continued floats:
documentclass[12pt]{book}
usepackage[colorlinks]{hyperref}
usepackage{cleveref}
usepackage{graphicx}

usepackage{caption}
captionsetup[figure]{labelsep=period,font=small,labelfont=small}

renewcommandthefigure{arabic{figure}.thechapter}

DeclareCaptionOption{continuedfigure}
  {renewcommandthefigure{Alph{ContinuedFloat}.arabic{figure}.thechapter}}
captionsetup[ContinuedFloat]{continuedfigure=}

begin{document}
setcounter{chapter}{4}
chapter{Chapter five}
section{Section one}
begin{figure}[!ht]
ContinuedFloat*
centering
includegraphics[scale=.25]{example-image}
caption{This is my caption}
label{fig:A:1:5}
end{figure}

begin{figure}[!ht]
ContinuedFloat
centering
includegraphics[scale=.25]{example-image}
caption{This is my caption}
label{fig:B:1:5}
end{figure}

begin{figure}[!ht]
centeringfbox{non-continued figure}
caption{some figure}
label{somefig}
end{figure}

we have in ref{fig:A:1:5} that ref{fig:B:1:5}

regular figure: ref{somefig}
end{document}

BTW: If thefigure is modified this way there is no need for an own custom label format, so I dropped the DeclareCaptionLabelFormat{myformat}{...}.

Receiving a wrong output from ref when ContinuedFloat is involved

3 Answers

Add your own answers!

Ask a Question