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树外部主题中的多个水平阴影

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树外部主题中的多个水平阴影

从树状外部主题开始，我想为每条标题行添加水平阴影（如阴影外部主题中所示），但每条标题行的阴影不同。举一个更引人注目的例子，文档标题的蓝色变为橙色，章节的紫色变为绿色，子章节的红色变为黄色，框架标题的黑色变为灰色。

从我之前的一个问题的答案中获得灵感（并从 Shadow 主题文件中粘贴了框架标题上的块）：

使用水平阴影调整信息线外部主题

我输入了以下代码：

\documentclass{beamer}

\usepackage{tikz}
\usetikzlibrary{shadings}

\useoutertheme{shadow}
\useoutertheme{tree}
\usecolortheme{whale}
\usefonttheme{professionalfonts}

\setbeamercolor{title in head/foot}{fg=white,bg=}
\setbeamercolor{section in head/foot}{fg=white,bg=}
\setbeamercolor{subsection in head/foot}{fg=white,bg=}
\setbeamercolor{frametitle}{fg=white,bg=}

\pgfdeclarehorizontalshading{beamer@titleshade}{\paperheight}{
    color(0pt)=(blue);
    color(\paperwidth)=(orange)
}

\pgfdeclarehorizontalshading{beamer@sectionshade}{\paperheight}{
    color(0pt)=(purple);
    color(\paperwidth)=(green)
}

\pgfdeclarehorizontalshading{beamer@subsectionshade}{\paperheight}{
    color(0pt)=(red);
    color(\paperwidth)=(yellow)
}

\pgfdeclarehorizontalshading{beamer@frametitleshade}{\paperheight}{
    color(0pt)=(black);
    color(\paperwidth)=(gray)
}

\makeatletter
\setbeamertemplate{headline}
{
    \leavevmode%
    \begin{beamercolorbox}[wd=\paperwidth,colsep=1.5pt]{upper separation line head}
    \end{beamercolorbox}
    \setbox\beamer@tempbox=\hbox{%
        \begin{beamercolorbox}[wd=\paperwidth,ht=2.5ex,dp=1.125ex,%
            leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}
            \usebeamerfont{title in head/foot}\insertshorttitle
        \end{beamercolorbox}
    }%
    \beamer@tempdim=\ht\beamer@tempbox%
    \advance\beamer@tempdim by 4pt%
    \vskip-\beamer@tempdim%
    \begin{pgfpicture}{0pt}{0pt}{\paperwidth}{20pt}
        \pgfpathrectangle{\pgfpointorigin}{\pgfpoint{\paperwidth}{\beamer@tempdim}}
        \pgfusepath{clip}
        \pgftext[left,base]{\pgfuseshading{beamer@titleshade}}
    \end{pgfpicture}
    \vskip-\beamer@tempdim%
    \box\beamer@tempbox%    
    \vskip0pt%
    \setbox\beamer@tempbox=\hbox{%  
        \begin{beamercolorbox}[wd=\paperwidth,ht=2.5ex,dp=1.125ex,%
            leftskip=.3cm,rightskip=.3cm plus1fil]{section in head/foot}
            \usebeamerfont{section in head/foot}%
            \ifbeamer@tree@showhooks
            \setbox\beamer@tempbox=\hbox{\insertsectionhead}%
            \ifdim\wd\beamer@tempbox>1pt%
            \hskip2pt\raise1.9pt\hbox{\vrule width0.4pt height1.875ex\vrule width 5pt height0.4pt}%
            \hskip1pt%
            \fi%
            \else%  
            \hskip6pt%
            \fi%
            \insertsectionhead
        \end{beamercolorbox}
    }
    \beamer@tempdim=\ht\beamer@tempbox%
    \advance\beamer@tempdim by 4pt%
    \vskip-\beamer@tempdim%
    \begin{pgfpicture}{0pt}{0pt}{\paperwidth}{20pt}
        \pgfpathrectangle{\pgfpointorigin}{\pgfpoint{\paperwidth}{\beamer@tempdim}}
        \pgfusepath{clip}
        \pgftext[left,base]{\pgfuseshading{beamer@sectionshade}}
    \end{pgfpicture}
    \vskip-\beamer@tempdim%
    \box\beamer@tempbox%    
    \vskip0pt%
    \setbox\beamer@tempbox=\hbox{%
        \begin{beamercolorbox}[wd=\paperwidth,ht=2.5ex,dp=1.125ex,%
            leftskip=.3cm,rightskip=.3cm plus1fil]{subsection in head/foot}
            \usebeamerfont{subsection in head/foot}%
            \ifbeamer@tree@showhooks
            \setbox\beamer@tempbox=\hbox{\insertsubsectionhead}%
            \ifdim\wd\beamer@tempbox>1pt%
            \hskip9.4pt\raise1.9pt\hbox{\vrule width0.4pt height1.875ex\vrule width 5pt height0.4pt}%
            \hskip1pt%
            \fi%
            \else%  
            \hskip12pt%
            \fi%
            \insertsubsectionhead
        \end{beamercolorbox}
        \begin{beamercolorbox}[wd=\paperwidth,colsep=1.5pt]{lower separation line head}
        \end{beamercolorbox}
    }
    \beamer@tempdim=\ht\beamer@tempbox%
    \advance\beamer@tempdim by 4pt%
    \vskip-\beamer@tempdim%
    \begin{pgfpicture}{0pt}{0pt}{\paperwidth}{20pt}
        \pgfpathrectangle{\pgfpointorigin}{\pgfpoint{\paperwidth}{\beamer@tempdim}} \pgfusepath{clip}
        \pgftext[left,base]{\pgfuseshading{beamer@subsectionshade}}
    \end{pgfpicture}
    \vskip-\beamer@tempdim%
    \box\beamer@tempbox%    
    \vskip0pt%
}

\setbeamertemplate{frametitle}
{%
    \nointerlineskip%
    \vskip-2pt%
    \hbox{\leavevmode
        \advance\beamer@leftmargin by -12bp%
        \advance\beamer@rightmargin by -12bp%
        \beamer@tempdim=\textwidth%
        \advance\beamer@tempdim by \beamer@leftmargin%
        \advance\beamer@tempdim by \beamer@rightmargin%
        \hskip-\Gm@lmargin\hbox{%
            \setbox\beamer@tempbox=\hbox{\begin{minipage}[b]{\paperwidth}%
                    \vbox{}\vskip-.75ex%
                    \leftskip0.3cm%
                    \rightskip0.3cm plus1fil\leavevmode
                    \insertframetitle%
                    \ifx\insertframesubtitle\@empty%
                    \strut\par%
                    \else
                    \par{\usebeamerfont*{framesubtitle}{\usebeamercolor[fg]{framesubtitle}\insertframesubtitle}\strut\par}%
                    \fi%
                    \nointerlineskip
                    \vbox{}%
            \end{minipage}}%
            \beamer@tempdim=\ht\beamer@tempbox%
            \advance\beamer@tempdim by 2pt%
            \begin{pgfpicture}{0pt}{0pt}{\paperwidth}{\beamer@tempdim}
                \usebeamercolor{frametitle right}
                \pgfpathrectangle{\pgfpointorigin}{\pgfpoint{\paperwidth}{\beamer@tempdim}}
                \pgfusepath{clip}
                \pgftext[left,base]{\pgfuseshading{beamer@frametitleshade}}
            \end{pgfpicture}
            \hskip-\paperwidth%
            \box\beamer@tempbox%
        }%
        \hskip-\Gm@rmargin%
    }%
    \nointerlineskip
    \vskip-0.2pt
    \hbox to\textwidth{\hskip-\Gm@lmargin\pgfuseshading{beamer@topshade}\hskip-\Gm@rmargin}
    \vskip-2pt
}

\makeatother

\title{Title}
\author{Author}
\institute{Institute}
\date{Date}

\begin{document}

\section{Title of Section 1}
\subsection{Title of Subsection 1-1}

\begin{frame}
\frametitle{Frame Title}
Some text.
\end{frame}

\end{document}

结果如下： 在此处输入图片描述

这是个不错的开始，但是请注意标题的高度不一致。特别是，小节行在正文下方“缩短”。此外，导航符号下方还有空白，我不知道它从何而来。

我推测它与阴影图片或投影仪颜色盒上方或下方的间距有关，但我不知道如何对其进行微调...

提前感谢您的建议！

答案1

您可以使用参数 控制颜色框的深度dp=1.125ex。要获得更多深度，请将其增加到例如1.5。

至于导航符号和框架底部之间的空间，这是您的脚线。尽管您将颜色设置为白色/透明，但它仍然存在。如果您想删除它：\setbeamertemplate{footline}{}

\documentclass{beamer}

\usepackage{tikz}
\usetikzlibrary{shadings}

\useoutertheme{shadow}
\useoutertheme{tree}
\usecolortheme{whale}
\usefonttheme{professionalfonts}

\setbeamercolor{title in head/foot}{fg=white,bg=}
\setbeamercolor{section in head/foot}{fg=white,bg=}
\setbeamercolor{subsection in head/foot}{fg=white,bg=}
\setbeamercolor{frametitle}{fg=white,bg=}

\pgfdeclarehorizontalshading{beamer@titleshade}{\paperheight}{
    color(0pt)=(blue);
    color(\paperwidth)=(orange)
}

\pgfdeclarehorizontalshading{beamer@sectionshade}{\paperheight}{
    color(0pt)=(purple);
    color(\paperwidth)=(green)
}

\pgfdeclarehorizontalshading{beamer@subsectionshade}{\paperheight}{
    color(0pt)=(red);
    color(\paperwidth)=(yellow)
}

\pgfdeclarehorizontalshading{beamer@frametitleshade}{\paperheight}{
    color(0pt)=(black);
    color(\paperwidth)=(gray)
}

\makeatletter
\setbeamertemplate{headline}
{
    \leavevmode%
    \begin{beamercolorbox}[wd=\paperwidth,colsep=1.5pt]{upper separation line head}
    \end{beamercolorbox}
    \setbox\beamer@tempbox=\hbox{%
        \begin{beamercolorbox}[wd=\paperwidth,ht=2.5ex,dp=1.5ex,%
            leftskip=.3cm,rightskip=.3cm plus1fil]{title in head/foot}
            \usebeamerfont{title in head/foot}\insertshorttitle
        \end{beamercolorbox}
    }%
    \beamer@tempdim=\ht\beamer@tempbox%
    \advance\beamer@tempdim by 4pt%
    \vskip-\beamer@tempdim%
    \begin{pgfpicture}{0pt}{0pt}{\paperwidth}{20pt}
        \pgfpathrectangle{\pgfpointorigin}{\pgfpoint{\paperwidth}{\beamer@tempdim}}
        \pgfusepath{clip}
        \pgftext[left,base]{\pgfuseshading{beamer@titleshade}}
    \end{pgfpicture}
    \vskip-\beamer@tempdim%
    \box\beamer@tempbox%    
    \vskip0pt%
    \setbox\beamer@tempbox=\hbox{%  
        \begin{beamercolorbox}[wd=\paperwidth,ht=2.5ex,dp=1.5ex,%
            leftskip=.3cm,rightskip=.3cm plus1fil]{section in head/foot}
            \usebeamerfont{section in head/foot}%
            \ifbeamer@tree@showhooks
            \setbox\beamer@tempbox=\hbox{\insertsectionhead}%
            \ifdim\wd\beamer@tempbox>1pt%
            \hskip2pt\raise1.9pt\hbox{\vrule width0.4pt height1.875ex\vrule width 5pt height0.4pt}%
            \hskip1pt%
            \fi%
            \else%  
            \hskip6pt%
            \fi%
            \insertsectionhead
        \end{beamercolorbox}
    }
    \beamer@tempdim=\ht\beamer@tempbox%
    \advance\beamer@tempdim by 4pt%
    \vskip-\beamer@tempdim%
    \begin{pgfpicture}{0pt}{0pt}{\paperwidth}{20pt}
        \pgfpathrectangle{\pgfpointorigin}{\pgfpoint{\paperwidth}{\beamer@tempdim}}
        \pgfusepath{clip}
        \pgftext[left,base]{\pgfuseshading{beamer@sectionshade}}
    \end{pgfpicture}
    \vskip-\beamer@tempdim%
    \box\beamer@tempbox%    
    \vskip0pt%
    \setbox\beamer@tempbox=\hbox{%
        \begin{beamercolorbox}[wd=\paperwidth,ht=2.5ex,dp=1.5ex,%
            leftskip=.3cm,rightskip=.3cm plus1fil]{subsection in head/foot}
            \usebeamerfont{subsection in head/foot}%
            \ifbeamer@tree@showhooks
            \setbox\beamer@tempbox=\hbox{\insertsubsectionhead}%
            \ifdim\wd\beamer@tempbox>1pt%
            \hskip9.4pt\raise1.9pt\hbox{\vrule width0.4pt height1.875ex\vrule width 5pt height0.4pt}%
            \hskip1pt%
            \fi%
            \else%  
            \hskip12pt%
            \fi%
            \insertsubsectionhead
        \end{beamercolorbox}
        \begin{beamercolorbox}[wd=\paperwidth,colsep=1.5pt]{lower separation line head}
        \end{beamercolorbox}
    }
    \beamer@tempdim=\ht\beamer@tempbox%
    \advance\beamer@tempdim by 4pt%
    \vskip-\beamer@tempdim%
    \begin{pgfpicture}{0pt}{0pt}{\paperwidth}{20pt}
        \pgfpathrectangle{\pgfpointorigin}{\pgfpoint{\paperwidth}{\beamer@tempdim}} \pgfusepath{clip}
        \pgftext[left,base]{\pgfuseshading{beamer@subsectionshade}}
    \end{pgfpicture}
    \vskip-\beamer@tempdim%
    \box\beamer@tempbox%    
    \vskip0pt%
}

\setbeamertemplate{frametitle}
{%
    \nointerlineskip%
    \vskip-2pt%
    \hbox{\leavevmode
        \advance\beamer@leftmargin by -12bp%
        \advance\beamer@rightmargin by -12bp%
        \beamer@tempdim=\textwidth%
        \advance\beamer@tempdim by \beamer@leftmargin%
        \advance\beamer@tempdim by \beamer@rightmargin%
        \hskip-\Gm@lmargin\hbox{%
            \setbox\beamer@tempbox=\hbox{\begin{minipage}[b]{\paperwidth}%
                    \vbox{}\vskip-.75ex%
                    \leftskip0.3cm%
                    \rightskip0.3cm plus1fil\leavevmode
                    \insertframetitle%
                    \ifx\insertframesubtitle\@empty%
                    \strut\par%
                    \else
                    \par{\usebeamerfont*{framesubtitle}{\usebeamercolor[fg]{framesubtitle}\insertframesubtitle}\strut\par}%
                    \fi%
                    \nointerlineskip
                    \vbox{}%
            \end{minipage}}%
            \beamer@tempdim=\ht\beamer@tempbox%
            \advance\beamer@tempdim by 2pt%
            \begin{pgfpicture}{0pt}{0pt}{\paperwidth}{\beamer@tempdim}
                \usebeamercolor{frametitle right}
                \pgfpathrectangle{\pgfpointorigin}{\pgfpoint{\paperwidth}{\beamer@tempdim}}
                \pgfusepath{clip}
                \pgftext[left,base]{\pgfuseshading{beamer@frametitleshade}}
            \end{pgfpicture}
            \hskip-\paperwidth%
            \box\beamer@tempbox%
        }%
        \hskip-\Gm@rmargin%
    }%
    \nointerlineskip
    \vskip-0.2pt
    \hbox to\textwidth{\hskip-\Gm@lmargin\pgfuseshading{beamer@topshade}\hskip-\Gm@rmargin}
    \vskip-2pt
}

\makeatother

\setbeamertemplate{footline}{}

\title{Title}
\author{Author}
\institute{Institute}
\date{Date}

\begin{document}

\section{Title of Section 1}
\subsection{Title of Subsection 1-1}

\begin{frame}
\frametitle{Frame Title}
Some text.
\end{frame}

\end{document}

在此处输入图片描述

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