我正在使用 beamerthemefocus为即将进行的演示。
我需要按如下方式自定义默认主题
我已经知道如何更改主题中标题的默认颜色。但是，我不知道如何插入徽标（矢量图形），使其与标题底纹的底线齐平，如果能帮助我实现这一点，我将不胜感激（如果可能的话，在每张幻灯片中都这样做，而不仅仅是演示文稿的标题幻灯片）。
答案1
您应该在文档的同一文件夹中创建一个名为的文件，beamerouterthemefocus.sty其内容如下：
% Copyright (C) 2018-2019 Pasquale Claudio Africa and the LaTeX community.
% A full list of contributors can be found at
%
% https://github.com/elauksap/focus-beamertheme
%
% This file is part of beamerthemefocus.
%
% beamerthemefocus is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% beamerthemefocus is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with beamerthemefocus. If not, see <http://www.gnu.org/licenses/>.
\mode<presentation>
\RequirePackage{appendixnumberbeamer} % Don't number appendix frames.
% Fix hyperref warning caused by \appendix
% (https://tex.stackexchange.com/questions/192686/hyperref-warning-caused-by-beamer-appendix).
\newcommand*{\bkmtranslateto}{\languagename}
\newcommand*{\bkmtranslate}[1]{%
\ifcsname tr@@@\bkmtranslateto @#1\endcsname
\csname tr@@@\bkmtranslateto @#1\endcsname
\else
#1%
\fi
}
\pdfstringdefDisableCommands{\let\translate\bkmtranslate}
\RequirePackage{bookmark}
\RequirePackage{etoolbox} % \BeforeBeginEnvironment.
\RequirePackage{tikz}
% FRAMETITLE TEMPLATES. --------------------------------------------------------
\defbeamertemplate*{frametitle}{focus}{%
% If not title page.
\ifnum\value{framenumber}>0%
% \vspace{-1pt}%
% \begin{beamercolorbox}[wd=\paperwidth,leftskip=0.55cm,rightskip=0.55cm,sep=0.2cm]{frametitle}%
% \strut\insertframetitle\strut%
%\hfill\includegraphics[scale=0.3]{logoUCL}\vskip0pt
% \end{beamercolorbox}%
\usebeamercolor{frametitle}\colorlet{focus@@temp}{bg}
\tikz[remember picture, overlay] {
\fill[color=focus@@temp] (current page.north west) rectangle ([yshift=-1.5cm]current page.north east) node[anchor= south east,inner sep=0pt]{\includegraphics[scale=0.3]{logoUCL}};
\node[anchor=north west] at ([shift={(0.55cm,-0.55cm)}]current page.north west) {\insertframetitle};
}
\fi%
}
% Plain header.
\defbeamertemplate*{frametitle}{plain}{%
% If not title page.
\ifnum\value{framenumber}>0%
\vspace{-1pt}%
\begin{beamercolorbox}[wd=\paperwidth,leftskip=0.55cm,rightskip=0.55cm,sep=0.2cm,ignorebg]{frametitle}%
\strut%
\end{beamercolorbox}%
\fi%
}
% FOOTLINE TEMPLATES. ----------------------------------------------------------
% Lenghts for the progress bar footline.
\newlength{\focus@pbar@height}% Progress bar height.
\newlength{\focus@pbar@leftoffset}
\newlength{\focus@pbar@rightoffset}
\defbeamertemplate*{footline}{progressbar}{%
% If not appendix.
\ifnum\mainend<0% From package appendixnumberbeamer.
%
\settowidth{\focus@pbar@leftoffset}{1}%
\addtolength{\focus@pbar@leftoffset}{1.5em}%
%
\settowidth{\focus@pbar@rightoffset}{\inserttotalframenumber}%
\addtolength{\focus@pbar@rightoffset}{1.5em}%
%
% If not title page.
\ifnum\c@framenumber>0%
\ifnum\c@framenumber<\inserttotalframenumber%
\begin{tikzpicture}[inner xsep=0.5em, inner ysep=0.5ex]\usebeamerfont{footline}
\pgfmathsetmacro{\focus@pbar@progress}%
{(\paperwidth-\focus@pbar@leftoffset-\focus@pbar@rightoffset)*(\insertframenumber/\inserttotalframenumber)}
\clip (0,0) rectangle ++(\paperwidth,\the\focus@pbar@height);
\fill[footline.bg] (0,0) rectangle ++(\the\focus@pbar@leftoffset,\the\focus@pbar@height);
\fill[footline.bg] (\the\focus@pbar@leftoffset,0) rectangle ++(\focus@pbar@progress pt,\the\focus@pbar@height)
++(0,{-0.5*\the\focus@pbar@height}) node[anchor=east, text=footline.fg] {\strut\insertframenumber};
\fill[footline.bg] (\paperwidth,0) rectangle ++(-\the\focus@pbar@rightoffset,\the\focus@pbar@height)
++(0,{-0.5*\the\focus@pbar@height}) node[anchor=west, text=footline.fg] {\strut\inserttotalframenumber};
\end{tikzpicture}%
\else%
\begin{tikzpicture}[inner xsep=0.5em, inner ysep=0.5ex]
\clip (0,0) rectangle ++(\paperwidth,\the\focus@pbar@height);
\fill[footline.bg] (0,0) rectangle ++(\paperwidth,\the\focus@pbar@height);
\node[anchor=east, footline.fg] at ({\paperwidth-\the\focus@pbar@rightoffset},{0.5*\focus@pbar@height}) {\strut\insertframenumber};
\node[footline.fg] at ({\paperwidth-\the\focus@pbar@rightoffset},{0.5*\focus@pbar@height}) {\strut/};
\node[anchor=west, footline.fg] at ({\paperwidth-\the\focus@pbar@rightoffset},{0.5*\focus@pbar@height}) {\strut\inserttotalframenumber};
\end{tikzpicture}%
\fi%
\fi%
\fi%
}
% Full bar footline.
\defbeamertemplate*{footline}{fullbar}{%
% If not appendix.
\ifnum\mainend<0% From package appendixnumberbeamer.
%
\settowidth{\focus@pbar@leftoffset}{1}%
\addtolength{\focus@pbar@leftoffset}{1.5em}%
%
\settowidth{\focus@pbar@rightoffset}{\inserttotalframenumber}%
\addtolength{\focus@pbar@rightoffset}{1.5em}%
%
% If not title page.
\ifnum\c@framenumber>0%
\begin{tikzpicture}[inner xsep=0.5em, inner ysep=0.5ex]
\clip (0,0) rectangle ++(\paperwidth,\the\focus@pbar@height);
\fill[footline.bg] (0,0) rectangle ++(\paperwidth,\the\focus@pbar@height);
\node[anchor=east, footline.fg] at ({\paperwidth-\the\focus@pbar@rightoffset},{0.5*\focus@pbar@height}) {\strut\insertframenumber};
\node[footline.fg] at ({\paperwidth-\the\focus@pbar@rightoffset},{0.5*\focus@pbar@height}) {\strut/};
\node[anchor=west, footline.fg] at ({\paperwidth-\the\focus@pbar@rightoffset},{0.5*\focus@pbar@height}) {\strut\inserttotalframenumber};
\end{tikzpicture}%
\fi%
\fi%
}
% Empty footline.
\defbeamertemplate*{footline}{none}{}
\DeclareOptionBeamer{numbering}{\def\beamer@focus@numbering{#1}}
\ExecuteOptionsBeamer{numbering=progressbar}
\ProcessOptionsBeamer
\def\beamer@focus@numberingprogressbar{progressbar}
\def\beamer@focus@numberingfullbar{fullbar}
\def\beamer@focus@numberingnone{none}
% BACKGROUND CANVAS TEMPLATES. -------------------------------------------------
\defbeamertemplate*{background canvas}{focus}{%
\begin{tikzpicture}
\clip (0,0) rectangle ++(\paperwidth,\paperheight);
\fill[normal text.bg] (0,0) rectangle ++(\paperwidth,\paperheight);
\end{tikzpicture}%
}
\defbeamertemplate*{background canvas}{focusplain}{%
\begin{tikzpicture}
\clip (0,0) rectangle ++(\paperwidth,\paperheight);
\fill[normal text.bg] (0,0) rectangle ++(\paperwidth,\paperheight);
\end{tikzpicture}%
}
\defbeamertemplate*{background canvas}{focusframe}{%
\begin{tikzpicture}
\clip (0,0) rectangle ++(\paperwidth,\paperheight);
\fill[frametitle.bg] (0,0) rectangle ++(\paperwidth,\paperheight);
\end{tikzpicture}%
}
% HOOKS FOR CREATING FRAMES. ---------------------------------------------------
\BeforeBeginEnvironment{frame}{%
\setbeamertemplate{background canvas}[focus]%
\setbeamertemplate{frametitle}[focus]%
%
% Reset footline height and determine it for the current slide.
\setlength{\focus@pbar@height}{0cm}%
\focus@calculatefootheight%
%
% If not appendix.
\ifnum\mainend<0 % From package appendixnumberbeamer.
\settoheight{\focus@pbar@height}{\usebeamerfont{footline}1234567890/}%
\addtolength{\focus@pbar@height}{6pt}%
%
\ifx\beamer@focus@numbering\beamer@focus@numberingprogressbar%
\setbeamertemplate{footline}[progressbar]%
\else%
\ifx\beamer@focus@numbering\beamer@focus@numberingfullbar%
\setbeamertemplate{footline}[fullbar]%
\fi%
\fi%
%
\focus@calculatefootheight%
\fi%
}
% Enable noframenumbering option.
\define@key{beamerframe}{noframenumbering}[true]{%
\setbeamertemplate{footline}[none]%
\setlength{\focus@pbar@height}{0cm}%
\focus@calculatefootheight%
%
\addtocounter{framenumber}{-1}%
}
% Enable plain option.
\define@key{beamerframe}{plain}[true]{%
\setbeamertemplate{background canvas}[focusplain]%
\setbeamertemplate{frametitle}[plain]%
%
\setbeamertemplate{footline}[none]%
}
% Full vertical centering
% (from https://tex.stackexchange.com/questions/247826/beamer-full-vertical-centering).
\define@key{beamerframe}{c}[true]{%
\beamer@frametopskip=0pt plus 1fill\relax%
\beamer@framebottomskip=0pt plus 1fill\relax%
\beamer@frametopskipautobreak=0pt plus 0.4\paperheight\relax%
\beamer@framebottomskipautobreak=0pt plus 0.6\paperheight\relax%
\def\beamer@initfirstlineunskip{}%
}
% Enable focus option.
\providebool{focus@standout}
\define@key{beamerframe}{focus}[true]{%
\booltrue{focus@standout}%
\begingroup%
\setkeys{beamerframe}{noframenumbering}%
\setbeamertemplate{background canvas}[focusframe]%
\setbeamertemplate{frametitle}[plain]%
%
\setkeys{beamerframe}{c}%
\centering%
\usebeamerfont{focusframe}%
\usebeamercolor[fg]{frametitle}%
}
\apptocmd{\beamer@reseteecodes}
{%
\ifbool{focus@standout}%
{%
\endgroup%
\boolfalse{focus@standout}%
}{}%
}{}{}
% Recalculate the footline's size and refresh other parameters.
% Partially copied from the definition of \beamer@calculateheadfoot.
\def\focus@calculatefootheight{%
\footheight=\focus@pbar@height%
\advance\footheight by 4pt%
\sidebarheight=\paperheight%
\advance\sidebarheight by-\headheight%
\advance\sidebarheight by\headdp%
\advance\sidebarheight by-\footheight%
\advance\sidebarheight by 4pt%
\footskip=\footheight%
\textheight=\paperheight%
\advance\textheight by-\footheight%
\advance\textheight by-\headheight%
\@colht\textheight%
\@colroom\textheight%
\vsize\textheight%
}
\mode<all>
您应该始终在同一个文件夹中创建第二个文件，beamerinnerthemefocus.sty其内容如下：
% Copyright (C) 2018-2019 Pasquale Claudio Africa and the LaTeX community.
% A full list of contributors can be found at
%
% https://github.com/elauksap/focus-beamertheme
%
% This file is part of beamerthemefocus.
%
% beamerthemefocus is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% beamerthemefocus is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with beamerthemefocus. If not, see <http://www.gnu.org/licenses/>.
\mode<presentation>
\RequirePackage{tikz}
% CUSTOMIZE STRUCTURE ELEMENTS. ------------------------------------------------
\setbeamertemplate{blocks}[default]
\setbeamertemplate{section in toc}[square]
\setbeamertemplate{subsection in toc}[square]
\setbeamertemplate{itemize items}[square]
\setbeamertemplate{itemize subitem}[triangle]
% STRUCTURE FRAME TEMPLATE DEFINITIONS. ----------------------------------------
% Title page.
\defbeamertemplate*{title page}{focus}{%
{%
\usebeamercolor{frametitle}\colorlet{focus@@temp}{bg}%
\begin{tikzpicture}[overlay, remember picture]
\fill[color=focus@@temp] (current page.north west) rectangle ([shift = {(0, -0.2\paperheight)}] current page.north east) node[anchor=south east,inner ysep=0 pt] {\includegraphics[scale=0.3]{logoUCL}};
\end{tikzpicture}
}
\begin{beamercolorbox}[sep=1pt,left]{institute}
\usebeamercolor[fg]{frametitle}
\usebeamerfont{institute}\insertinstitute
\end{beamercolorbox}
\vskip4em\par
% \begin{beamercolorbox}[sep=8pt,left]{title}
%\usebeamercolor[bg]{normal text}
% \usebeamerfont{title}\inserttitle\par
% {\usebeamerfont{subtitle}\insertsubtitle\par}%
% \end{beamercolorbox}
\begin{minipage}[t]{\textwidth}
\usebeamerfont{title}\inserttitle\par
{\usebeamerfont{subtitle}\insertsubtitle\par}%
\end{minipage}
%\vspace{-1.65\baselineskip}
% \begin{minipage}[b][0.35\paperheight]{\textwidth}
% \vspace{\baselineskip}
% \usebeamerfont{title}
% \usebeamercolor[fg]{frametitle}
% \inserttitle
% \end{minipage}
%
% \begin{minipage}[t][0.1\paperheight]{\textwidth}
% \usebeamerfont{subtitle}
% \usebeamercolor[fg]{frametitle}
% \insertsubtitle
% \end{minipage}
%
% % Set the title graphic in a zero-height box, so that
% % the position of other elements is not affected.
{\vfuzz=9999pt\vbox to 0pt {
\raggedleft
\inserttitlegraphic
}}
\vskip4em\par
\begin{minipage}[t]{\textwidth}
\usebeamerfont{author}
\insertauthor
\end{minipage}
%
%\vspace*{\baselineskip}
% \begin{minipage}[t]{\textwidth}
% \usebeamerfont{institute}
% \insertinstitute
% \end{minipage}
\vspace*{\baselineskip}
\begin{minipage}[t]{\textwidth}
\usebeamerfont{date}
\insertdate
\end{minipage}
\vspace*{0pt plus 100fill}
\addtocounter{framenumber}{-1}
}
% Section page.
\defbeamertemplate*{section page}{focus}{%
{%
\usebeamercolor{frametitle}\colorlet{focus@@temp}{bg}%
\begin{tikzpicture}[overlay, remember picture]
\fill[color=focus@@temp] (current page.north west) rectangle ([shift = {(0, -0.45\paperheight)}] current page.north east)node[anchor=south east,inner ysep=0 pt] {\includegraphics[scale=0.3]{logoUCL}};
\end{tikzpicture}%
}
\vspace{-2.5\baselineskip}
\begin{minipage}[b][0.45\paperheight]{\textwidth}
\usebeamerfont{sectiontitle}
\usebeamercolor[fg]{frametitle}
\let\hyperlink\@secondoftwo\insertsection
\end{minipage}
\vspace{1.5\baselineskip}
\begin{minipage}[t][0.55\paperheight]{\textwidth}
\usebeamerfont{subsectiontitle}
\usebeamercolor[bg]{frametitle}
\insertsubsection
\end{minipage}
}
\AtBeginSection[]{%
\begin{frame}[plain, noframenumbering]{}
\sectionpage
\end{frame}%
}
% Subsection page.
\defbeamertemplate*{subsection page}{focus}{%
{%
\usebeamercolor{frametitle}\colorlet{focus@@temp}{bg}%
\begin{tikzpicture}[overlay, remember picture]
\fill[color=focus@@temp] (current page.north west) rectangle ([shift = {(0, -0.45\paperheight)}] current page.north east)node[anchor=south east,inner ysep=0 pt] {\includegraphics[scale=0.3]{logoUCL}};
\end{tikzpicture}%
}
\vspace{-2.5\baselineskip}
\begin{minipage}[b][0.45\paperheight]{\textwidth}
\usebeamerfont{sectiontitle}
\usebeamercolor[fg]{frametitle}
\let\hyperlink\@secondoftwo\insertsection
\end{minipage}
\vspace{1.5\baselineskip}
\begin{minipage}[t][0.55\paperheight]{\textwidth}
\usebeamerfont{subsectiontitle}
\usebeamercolor[bg]{frametitle}
\insertsubsection
\end{minipage}
}
\AtBeginSubsection[]{%
\begin{frame}[plain, noframenumbering]{}
\subsectionpage
\end{frame}%
}
\mode<all>
在您的文档中设置后的结果\setbeamercolor{frametitle}{bg=black}如下：
