Beamer -- How to add section title to the footer and keep the color scheme

Question

I'm using the very elegant Boadilla theme and would like to keep its color schemes, but I would like to change the fields it uses.

It presents:

Author | Presentation title | Date + curr_frame/Total Frame

I would prefer to use

Presentation title | Section title | Date + curr_frame/Total Frame

I already found a solution in Insert sectiontitle in footer, but unfortunately it changes the color schemes.

Unfortunately, boadilla.sty uses very terse Beamer reference that can't easily be understood by an eventual LaTeX user. I suppose part of the answer lies in the use of the rose color theme.

Answer 1

Boadilla uses the footline from the infolines outer theme. You can redefine it like this:

\documentclass{beamer}

\usetheme{Boadilla}

\author{names}
\title{Title}

\setbeamertemplate{footline}
{%
  \leavevmode%
  \hbox{%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
    \usebeamerfont{title in head/foot}\insertshorttitle
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
    \usebeamerfont{title in head/foot}\insertsectionhead
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,leftskip=2ex,rightskip=2ex,sep=0pt]{date in head/foot}%
    \hfill%
    \usebeamerfont{date in head/foot}%
    \insertshortdate{}%
    \hfill%
    \usebeamercolor[fg]{page number in head/foot}%
    \usebeamerfont{page number in head/foot}%
    \usebeamertemplate{page number in head/foot}%
  \end{beamercolorbox}}%
  \vskip0pt%
}


\begin{document}

\section{section}
\begin{frame}
test
\end{frame}

\end{document}