Center text and images both vertically and horizontally in longtable

Question

I would like to center text and images both vertically and horizontally in a longtable. However I can't seem to get it to work unfortunately. A example is below:

\documentclass[11pt,a4paper,english]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}
\usepackage{array,longtable,ragged2e}
\usepackage{graphicx}
\begin{document}
\begin{longtable}{| l | c | c |}
    \hline
     & Here is a Text & Here is a Text \\hline
    Here is a Text & \includegraphics[height=2cm]{img/image.png} & \includegraphics[height=2cm]{img/image.png} \\hline 
    Here is a Text & \raisebox{-\height}{\includegraphics[height=2cm]{img/image.png}} & \raisebox{-\height}{\includegraphics[height=2cm]{img/image.png}} \\hline

\caption{My Caption}
\label{tab:FirstTab}
\end{longtable}
\mbox{}\
\end{document}

I also tried the changes below, but it didn't help:

Here is a Text & \raisebox{-\height}{\includegraphics[height=2cm]{img/image.png}} & \raisebox{-\height}{\includegraphics[height=2cm]{img/image.png}} \\\hline

You should use\raisebox{\dimexpr 0.5\ht\strutbox-0.5\dp\strutbox-0.5\height}{...}`. The \strutbox stuff locates the center of text, not the baseline. — John Kormylo, Nov 07 '20 at 03:17

Zarko · Accepted Answer · 2020-11-07T10:09:02.957

One way is to use valign macro from the adjusbox package:

\documentclass[11pt,a4paper,english]{article}
\usepackage[T1]{fontenc}
\usepackage{ragged2e}
\usepackage{babel}
\usepackage{array,longtable,makecell}
\usepackage[demo,               % in real document delete 'demo'
            export]{adjustbox}  % it load graphicx too
\begin{document}
\begingroup
\setcellgapes{3pt}
\makegapedcells % add vertical space/above/below cell's content
\begin{longtable}{| l | c | c |}
    \hline
     & Here is a Text & Here is a Text \\hline
    Here is a Text & \includegraphics[height=2cm,valign=c]{img/image.png} & \includegraphics[height=2cm,valign=c]{img/image.png} \\hline
    Here is a Text & \includegraphics[height=2cm,valign=c]{img/image.png} & \includegraphics[height=2cm,valign=c]{img/image.png} \\hline
\caption{My Caption}
\label{tab:FirstTab}
\end{longtable}
\endgroup
\end{document}

At using adjustbox, we can replace includegraphics with \adjustimage add determine positions of images in cells with settings in \adjustboxset:

\documentclass[11pt,a4paper,english]{article}
\usepackage[T1]{fontenc}
\usepackage{ragged2e}
\usepackage{babel}
\usepackage{array,longtable}
\usepackage[demo,               % in real document delete 'demo'
            export]{adjustbox}  % it load `graphicx` too
\begin{document}
\begingroup
\adjustboxset{height=20mm,valign=c, margin=0pt 3pt 0pt 3pt} % <---
\begin{longtable}{| l | c | c |}
    \hline
                & Here is a Text                & Here is a Text                \
    \hline
Here is a Text  & \adjustimage{}{img/image} & \adjustimage{}{img/image} \
    \hline
Here is a Text  & \adjustimage{}{img/image} & \adjustimage{}{img/image} \
    \hline
\caption{My Caption}
\label{tab:FirstTab}
\end{longtable}
\endgroup
\end{document}

which gives the same result as the first proposed solution. Note, in above MWE are omitted graphics file extensions png. They are necessary if there are available the same images' files with different extensions and among them you want to use only selected one.

And to think of all the time I spent going through the graphicx manual looking for valign! — John Kormylo, Nov 07 '20 at 17:43

Center text and images both vertically and horizontally in longtable

1 Answers1