Underline text with === (SETEX style)

Question

I'm trying to recreate the typewriter look.

How to make \underline{sometext} work like SETEX-style section marker?

The intended use is with monospaced/typewriter fonts for lines with plenty of space beneath them (like section headings).

Illustration of desired effect below.

Related/possible starting point: https://tex.stackexchange.com/questions/27258/how-do-i-write-underline-text-but-with-a-dotted-line and https://superuser.com/questions/1136672/double-underline-one-of-them-dashed. — Marijn, Jan 15 '21 at 14:49

score 3 · Accepted Answer · answered Jan 15 '21 at 16:42

3

For example using \halign and \leaders primitives:

\def\underlined#1{\vtop{\tt\halign{##\cr#1\cr\leaders\hbox{=}\hfill\cr}}}
Text: \underlined{Odwolanie upowaznienia}
\bye

answered Jan 15 '21 at 16:42

wipet

74,238

Neat solution with \leaders – DG' Jan 15 '21 at 16:51
How do you adjust the distance of the underlining from the underlined text? – Marek Kowalczyk Jan 18 '21 at 23:14
@MarekKowalczyk Using \noalign{\kern-1pt} (-1pt just for example) inserted between second \cr and \leaders in the macro. – wipet Jan 19 '21 at 13:19
This works: \def\underlined#1{\vtop{\halign{##\cr#1\cr\noalign{\kern-6pt}\leaders\hbox{=}\hfill\cr}}} – Marek Kowalczyk Jan 21 '21 at 13:47

DG' · Answer 2 · 2021-01-15T16:44:09.970

1

The real typewriter look can be achieved by setting a number of = below the title. Here is an example with \section:

\documentclass{article}
\usepackage{xstring}
\usepackage{multido}
\usepackage[explicit]{titlesec}
\usepackage[default]{sourcecodepro}
\newcommand\setex[1]
  {#1 \ \StrLen{#1}[\len]\multido{}{\len}{=}}
\titleformat{\section}
  {\normalfont\filcenter}{}{0pt}{\setex{#1}}
\begin{document}
\section{Test}
Lorem ipsum...
\end{document}

This will not work for really long section titles.

edited Jan 15 '21 at 16:44

answered Jan 15 '21 at 16:37

DG'

21,727

How do you adjust the distance of the underlining from the underlined text? – Marek Kowalczyk Jan 18 '21 at 23:14
It's just a simple line of text, you can try adjusting the baseline or something like that – DG' Jan 19 '21 at 08:57
1

This works: \newcommand\setex[1]{#1 \\ \StrLen{#1}[\len]\kern-4pt\multido{}{\len}{=}} – Marek Kowalczyk Jan 21 '21 at 13:45

Underline text with === (SETEX style)

2 Answers2