Indent for second line in long chapter title

Question

I am using the book class to write a document. I have a long chapter title that only fits in two lines. I'm using a custom chapter heading font and the justification of the chapter title in the second line is hidden by the black box.

\documentclass[12pt, twoside]{book}

\usepackage{lipsum}

\usepackage{titlesec,calc,xcolor}
\usepackage{lmodern}


\titleformat{\chapter}[display]{\fontsize{18}{16}\usefont{OT1}{phv}{m}{n}\bfseries}{}{0pt}{
    \raisebox{-5mm}[0pt][0pt]{%<<
        \begin{minipage}{20mm}
            \centering{\mdseries\footnotesize\normalsize\textsc{Chapter}}\\[5pt]%
            \rule{10mm}{30mm}\hspace{-10mm}%
            \raisebox{23mm}{\parbox{10mm}{\centering\LARGE\textcolor{white}{\thechapter}}}%
        \end{minipage}
    }%
    \rule{\textwidth-20mm}{.4pt}\\%
    \hspace*{20mm}  
}[\vspace*{10mm}]


\begin{document}

\chapter{This is an example of a very long title that only fits in two lines}

    \section{Section 1}
    \lipsum[1]

\end{document}

How do I do this please ?

The baseline distance of your "want to have" example is greater than that of the original, non-indented, example. If that is significant, please make that clear. — barbara beeton, Jan 03 '20 at 22:59
Because the want to have version was edited manually as an image. Otherwise it's not significant, I keep the default baseline distance. — Amedo, Jan 05 '20 at 09:11
See also sectioning - Indent for second line of chapter/section title - TeX - LaTeX Stack Exchange — user202729, Jan 01 '22 at 00:56

score 2 · Accepted Answer · answered Dec 30 '19 at 21:31

You could put the chapter title in a minipage.

\documentclass[12pt, twoside]{book}
\usepackage{lipsum}
\usepackage{titlesec,calc,xcolor}
\usepackage{lmodern}

\titleformat{\chapter}[display]{\fontsize{18}{16}\usefont{OT1}{phv}{m}{n}\bfseries}{}{0pt}{
    \raisebox{-5mm}[0pt][0pt]{%<<
        \begin{minipage}{20mm}
            \centering{\mdseries\footnotesize\normalsize\textsc{Chapter}}\\[5pt]%
            \rule{10mm}{30mm}\hspace{-10mm}%
            \raisebox{23mm}{\parbox{10mm}{\centering\LARGE\textcolor{white}{\thechapter}}}%
        \end{minipage}
    }%
    \rule{\textwidth-22mm}{.4pt}\\%
    \hspace*{22mm}\begin{minipage}{\textwidth-22mm}
}[\end{minipage}\vspace*{10mm}]

\begin{document}

\chapter{This is an example of a very long title that only fits in two lines}
    \section{Section 1}
    \lipsum[1]

\end{document}

score 2 · Answer 2 · answered Dec 30 '19 at 22:20

Here is a variant: I changed the chapterstyle to block, put the chapter title in a \parbox of width \linegoal, which measures the length from the current point to the right margin and used \titlerule, which simply fills the line from the current point to the right margin.

\documentclass[12pt, twoside]{book}
\usepackage{lmodern}
\usepackage{lipsum}
\usepackage{calc,xcolor}
\usepackage{linegoal}
\usepackage{titlesec}%

\titleformat{\chapter}[block]{\fontsize{18}{16}\usefont{OT1}{phv}{m}{n}\bfseries}{}{0pt}{
    \raisebox{-5mm}[0pt][0pt]{%<<
        \begin{minipage}{20mm}
            \centering{\mdseries\footnotesize\normalsize\textsc{Chapter}}\\[5pt]%
            \medskip\rule{10mm}{30mm}\hspace{-10mm}%
            \raisebox{23mm}{\parbox{10mm}{\centering\LARGE\textcolor{white}{\thechapter}}}%
        \end{minipage}
}%
 \titlerule\\%
    \hspace*{\dimexpr20mm +0.5em}
\parbox{\linegoal} }[\vspace*{10mm}]

\begin{document}

\chapter{This is an example of a very long title that only fits in two lines}

    \section{Section 1}
    \lipsum[1]

\end{document}

Indent for second line in long chapter title

2 Answers2

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