I made this LaTeX function:
\newcommand{\Hrule}[2]{\vspace{#1}\hrule\vspace{#2}}
Now, I'd like to edit this function in this way: I want add a #3 in whose specify the color of this \Hrule.
And I want add a #4 to declare the thickness of \hrule.
Is it possible?
For example if I write \Hrule{2mm}{2mm}{red}{2.5mm} I would obtain a red \hrule ... .
Must I provide a minimum MWE?
Thank you so much.
You should use \par\addvspace rather than \vspace at the beginning.
Next, you can start a group to set the color. The default value of the optional argument is . that in xcolor stands for the current color.
\documentclass{article}
\usepackage{xcolor}
\newcommand{\Hrule}[3][.]{%
\par\addvspace{#2}%
\begingroup\color{#1}%
\hrule
\endgroup
\addvspace{#3}%
}
\begin{document}
Some text
\Hrule{3pt}{1pt}
Some other text
\Hrule[red!40]{3pt}{1pt}
Some other text
\end{document}
If you want to add another argument to set the thickness you can do
\documentclass{article}
\usepackage{xcolor}
\newcommand{\Hrule}[4][.]{%
\par\addvspace{#2}%
\begingroup\color{#1}%
\hrule height #4
\endgroup
\addvspace{#3}%
}
\begin{document}
Some text
\Hrule{3pt}{1pt}{0.4pt}
Some other text
\Hrule[red!40]{3pt}{1pt}{2pt}
Some other text
\end{document}
However, using four arguments is error prone, so I suggest a key-value based approach.
\documentclass{article}
\usepackage{xcolor}
\ExplSyntaxOn
\NewDocumentCommand{\Hrule}{m}
{
\group_begin:
\keys_set:nn { puck/hrule } { #1 }
\par\addvspace{\l_puck_hrule_before_skip}
\color{\l_puck_hrule_color_tl}
\hrule height \l_puck_hrule_thickness_dim
\addvspace{\l_puck_hrule_after_skip}%
\group_end:
}
\keys_define:nn { puck/hrule }
{
before .skip_set:N = \l_puck_hrule_before_skip,
after .skip_set:N = \l_puck_hrule_after_skip,
thickness .dim_set:N = \l_puck_hrule_thickness_dim,
thickness .initial:n = 0.4pt,
color .tl_set:N = \l_puck_hrule_color_tl,
color .initial:n = .,
}
\ExplSyntaxOff
\begin{document}
Some text
\Hrule{before=3pt,after=1pt}
Some other text
\Hrule{color=red!40,before=3pt,after=1pt,thickness=2pt}
Some other text
\end{document}
The output is the same as in the previous picture.
\documentclass[twocolumn]{article}
\usepackage{xcolor}
\newcommand{\HruleEgreg}[4][.]{%
\par\addvspace{#2}%
\begingroup\color{#1}%
\hrule height #4
\endgroup
\addvspace{#3}%
}
\newcommand{\HruleSergio}[4]{%
\par\noindent\vspace{#1}%
{\color{#3}\rule{\columnwidth}{#4}}% \columnwidth instead of \textwidth
\par\vspace{#2}%
}
\begin{document}
\textbf{Egreg}
\medskip
Some text
\HruleEgreg{3pt}{1pt}{0.4pt}
Some other text
\HruleEgreg[red!40]{3pt}{1pt}{2pt}
Some other text
\newpage
\textbf{Sergio}
\medskip
Some text
\HruleSergio{3pt}{1pt}{black}{0.4pt}
Some other text
\HruleSergio{3pt}{1pt}{red!40}{2pt}
Some other text
\end{document}
You can see that the amount of spacing with my solution is exactly what's requested.
\begingroup...\engroup than {...}? and Why you prefer addvspace rather than vspace?
– Sergio Llorente
Sep 27 '21 at 13:12
\addvspace (lists, section titles,…) the largest of the two spaces will be used.
– egreg
Sep 27 '21 at 13:17
You can use:
\newcommand{\Hrule}[4]{\vspace{#1}{\color{#3}\rule{\textwidth}{#4}}\vspace{#2}}
Note that you must use color or xcolor package.
Note also that this command may have an unexpected behaviour if you use it without start a new paragraph. Usually the line is going to break always the paragraph, so you can use:
\newcommand{\Hrule}[4]{\par\noindent\vspace{#1}{\color{#3}\rule{\textwidth}{#4}}\par\vspace{#2}}
\rule? – Sigur Sep 24 '21 at 13:38