1

Is there any way to prevent a tcolorbox from being at the bottom of a page, and instead push it to the next page automatically?

MWE:

\documentclass[a4paper, 10pt, oneside, twocolumn]{memoir}

\usepackage{tcolorbox}
\usepackage{lipsum}

\newtcolorbox{outcome}{before skip=2em, after skip=1em}

\begin{document}

\section{Sample}

\begin{outcome}
    This is some sample text. This is some sample text. This is some sample text. 
\end{outcome}

\lipsum[1-6]

This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. 

\begin{outcome}
    Sample text.
\end{outcome}

This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. 

\end{document}

enter image description here

ruby
  • 105

2 Answers2

1

Try this:

\makeatletter
\newtcolorbox{outcome}{before skip=2em, after={%
    \tcb@parfillskip@check\par\ifvmode\nointerlineskip
    \nobreak
    \addvspace{\glueexpr 1em-\parskip}\fi
    }}
\makeatother

The code is copied verbatim from the definition of after skip/.style in tcolorbox.sty, with #1 replaced by your hard coded value 1em and a \nobreak added in order to keep the box together with the following paragraph.

Harald Hanche-Olsen
  • 15,968
  • This works, but seems to change the spacing after the box (https://imgur.com/a/M6RdFWR). I've tried it in my document as well, and it seems to cause different boxes to have different spacing. – ruby Aug 17 '19 at 17:25
  • Does it work better now? It seems so, to me. – Harald Hanche-Olsen Aug 17 '19 at 19:12
  • Honestly though, I can't understand the reason for wrapping code in \ifvmode…\fi, given the \par immediately preceding. That should guarantee that we're in vertical mode, unless someone has redefined \par to do something unexpected of course. – Harald Hanche-Olsen Aug 17 '19 at 19:22
0

Here is a way from the old answer of mine here:

\documentclass[a4paper, 10pt, oneside, twocolumn]{memoir}

\usepackage{tcolorbox}
\usepackage{lipsum}

\newsavebox{\mybottombox} % Box to save the text of the command 
\newlength{\mybottomlength} % The length of our text inside the command
\newlength{\availafter} % The available length left on the page after placing our text


% Optional argument is the minimum length after the nobottom text for not pagebreak. Change it to your needs
\newcommand{\nobottom}[2][60pt]{\savebox{\mybottombox}{\vbox{#2}}\setlength{\mybottomlength}{\ht\mybottombox}%
\setlength{\availafter}{\dimexpr\textheight-\mybottomlength-\pagetotal\relax}\ifdim\availafter<#1%
\pagebreak\noindent\usebox{\mybottombox}%
\else%
\noindent\usebox{\mybottombox}%
\fi%
}%

\newtcolorbox{outcome}{before skip=2em, after skip=1em}

\begin{document}

\section{Sample}

\begin{outcome}
    This is some sample text. This is some sample text. This is some sample text. 
\end{outcome}

\lipsum[1-6]

This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. 

\nobottom{%
\begin{outcome}
    Sample text.
\end{outcome}}

This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. This is some sample text. 

\end{document}

enter image description here

koleygr
  • 20,105