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在投影仪标题中添加字体阴影

tag-icon • tag-icon tikz-pgf beamer shadows
在投影仪标题中添加字体阴影

我正在尝试将 Powerpoint 模板移植到 beamer，并且尝试复制这种字体样式：

字体样式

我在两个地方使用这种字体：

  • 标题页。此文本是 beamercolorbox 中的一个段落（3 行）。我无法拆分段落，因为我使用的是 \inserttitle。但如果有必要，我可以使用 TikZ 节点。
  • 框架标题。此文本仅占 TikZ 节点内的一行。

我试过：

  • 包 shadowtext：将段落转换为一行（溢出）
  • 我试过这：将段落转换为一行（溢出）
  • 我尝试了 TikZ 阴影：它绘制的是方框阴影，而不是文本阴影
  • 我试过这：它是轮廓，并且看起来不太好看。

我正在使用 pdflatex。

当前工作示例（没有任何类型的阴影）：

演示文稿.tex

\documentclass{beamer}

\usepackage[utf8]{inputenc} % UTF8
\usetheme{ABS}

\title{This is a very long title that spans over several lines. It is very long, isn't it?}
\author{Mr. Me}
\institute{
Faculty of applied Internet\\
University of somewhere
}
\date{28 June 2016}

\begin{document}
\frame{\titlepage}
\begin{frame}
\frametitle{Table of Contents}
\tableofcontents
\end{frame}

\section{Introduction}
\begin{frame}
\frametitle{This is the first slide}
%Content goes here
\end{frame}
\begin{frame}
\frametitle{This is the second slide}
\framesubtitle{A bit more information about this}
%More content goes here
\end{frame}
% etc
\end{document}

beamerthemeABS.sty

\mode<presentation>

% http://www.r-bloggers.com/create-your-own-beamer-template/
% https://tex.stackexchange.com/questions/146529/design-a-custom-beamer-theme-from-scratch

\mode<presentation>
\usepackage{tikz}
\usepackage{color}

\usetikzlibrary{shadows}

% Color definitions
\definecolor{green-abs}{RGB}{45, 137, 115}
\definecolor{light-green-abs}{RGB}{53, 159, 133}
\definecolor{light-blue-abs}{RGB}{208, 240, 245}

\definecolor{titlecolor-abs}{RGB}{255, 255, 255}
\definecolor{textcolor-abs}{RGB}{0, 0, 0}

% Color assignments
\setbeamercolor{frametitle}{fg = titlecolor-abs}
\setbeamercolor{title}{fg = titlecolor-abs}

\setbeamercolor{section in toc}{fg = textcolor-abs}
\setbeamercolor{section in toc shaded}{fg = textcolor-abs}

\setbeamercolor{item}{fg = textcolor-abs}
\setbeamercolor{subitem}{fg = textcolor-abs}
\setbeamercolor{subsubitem}{fg = textcolor-abs}

\setbeamercolor{description item}{fg = textcolor-abs}

\setbeamercolor{caption}{fg = textcolor-abs}
\setbeamercolor{caption name}{fg = textcolor-abs}

\setbeamercolor{normal text}{fg = textcolor-abs}

% Background
\setbeamertemplate{background canvas}{
    \ifnum\c@framenumber=1
        % First slide
        \begin{tikzpicture}[remember picture, overlay]
        \shade[outer color=green-abs, inner color=light-green-abs]
            (current page.north east) rectangle (current page.south west);
        \end{tikzpicture}
    \else
        % Other slides
        \begin{tikzpicture}[remember picture, overlay]
        \shade[top color=light-blue-abs, bottom color=white]
            (current page.north east) rectangle (current page.south west);
        \end{tikzpicture}
    \fi
}

% Inner theme
\useinnertheme{rounded}

% Outer theme
\setbeamerfont{frametitle}{size = \Large}

\setbeamertemplate{frametitle}{
    \begin{beamercolorbox}[wd=\paperwidth, ht=1.5cm]{frametitle}
    \begin{tikzpicture}[remember picture, overlay]
        \shade[outer color=green-abs, inner color=light-green-abs]
            (0, 0) rectangle (\the\paperwidth, 1.55cm);
        %%%%%%
        % I'd like to set the style of frametitles
        %%%%%%
        \node[anchor = west, titlecolor-abs] at (0.5, 0.8)
            {\usebeamerfont{frametitle}\insertframetitle};
    \end{tikzpicture}
    \end{beamercolorbox}
}

% Title
\setbeamerfont{title}{size = \huge}

\setbeamertemplate{title page}{
    \vfill
    \centering
    \begin{beamercolorbox}[sep=8pt, center]{title}
        %%%%%%
        % I'd like to set the style of titles, which may be very long
        %%%%%%
        \usebeamerfont{title}\inserttitle\par
    \end{beamercolorbox}
    \vskip1em\par
    \begin{beamercolorbox}[sep=8pt,center]{author}
    \usebeamerfont{author}\insertauthor
    \end{beamercolorbox}
    \begin{beamercolorbox}[sep=8pt,center]{institute}
    \usebeamerfont{institute}\insertinstitute
    \end{beamercolorbox}
    \begin{beamercolorbox}[sep=8pt,center]{date}
    \usebeamerfont{date}\insertdate
    \end{beamercolorbox}\vskip0.5em
    {\usebeamercolor[fg]{titlegraphic}\inserttitlegraphic\par}
    %\endgroup
    \vfill
}

\mode<all>

答案1

一个快速的方法是再次写标题，稍微偏移一点，颜色更深。以下示例使用背景色和黑色的混合\color{black!20!green-abs}，比示例中显示的阴影稍微暗一些，但可以根据您的需要进行调整。

\setbeamertemplate{frametitle}{
    \begin{beamercolorbox}[wd=\paperwidth, ht=1.5cm]{frametitle}
        \begin{tikzpicture}[remember picture, overlay]
        \shade[outer color=green-abs, inner color=light-green-abs]
        (0, 0) rectangle (\the\paperwidth, 1.55cm);
        %%%%%%
        % I'd like to set the style of frametitles
        %%%%%%
        \node[anchor = west, titlecolor-abs] at (0.53, 0.77)
        {\usebeamerfont{frametitle}\color{black!20!green-abs}\insertframetitle};
        \node[anchor = west, titlecolor-abs] at (0.5, 0.8)
        {\usebeamerfont{frametitle}\insertframetitle};
        \end{tikzpicture}
    \end{beamercolorbox}
}

在此处输入图片描述

编辑：

为了获得更平滑的阴影，可以堆叠更多不同色调的图层。在以下示例中，使用了 5 个图层来创建更平滑的阴影：

\setbeamertemplate{frametitle}{
    \begin{beamercolorbox}[wd=\paperwidth, ht=1.5cm]{frametitle}
        \begin{tikzpicture}[remember picture, overlay]
        \shade[outer color=green-abs, inner color=light-green-abs]
        (0, 0) rectangle (\the\paperwidth, 1.55cm);
        %%%%%%
        % I'd like to set the style of frametitles
        %%%%%%
        \foreach \x in {0,5,...,20}
            \node[anchor = west, titlecolor-abs, xshift=\x*-0.002cm, yshift=\x*0.002cm] at (0.5, 0.8) {%
                \usebeamerfont{frametitle}%
                \color{black!\x!green-abs}%
                \insertframetitle%
            };
        \node[anchor = west, titlecolor-abs] at (0.5-0.002*20, 0.8+0.002*20)
        {\usebeamerfont{frametitle}\insertframetitle};
        \end{tikzpicture}
    \end{beamercolorbox}
}

在此处输入图片描述

答案2

我会完成samcarter 的回答我添加了一些修改：我将代码移到一个函数，并且加深了阴影。

功能：

\tikzset{
    text shadow/.code args={[#1]#2at#3(#4,#5)#6}{
        \pgfkeysalso{/tikz/.cd,#1}
        \foreach \x in {0,10,...,40}{%
            \node[#1, xshift=\x*-0.001cm, yshift=\x*0.001cm] at (#4,#5){%
            \color{black!\x!green-abs}
            #6
            };
        }
        \node[#1] at (#4-0.001*40, #5+0.001*40){#6};
    }
}

（tzset示例来自这里）

框架标题：

\setbeamertemplate{frametitle}{
    \begin{beamercolorbox}[wd=\paperwidth, ht=1.5cm]{frametitle}
    \begin{tikzpicture}[remember picture, overlay]
        \shade[outer color=green-abs, inner color=light-green-abs]
            (0, 0) rectangle (\the\paperwidth, 1.55cm);
        \node[text shadow={[anchor = west, titlecolor-abs] at (0.5, 0.8)
            {\usebeamerfont{frametitle}\insertframetitle}}] {};
    \end{tikzpicture}
    \end{beamercolorbox}
}

封面：

\setbeamertemplate{title page}{
    \vfill
    \centering
    \begin{beamercolorbox}[sep=25pt, center]{title}
        \begin{tikzpicture}[remember picture, overlay]
        \node[text shadow={[titlecolor-abs, text width=0.85\paperwidth, text centered] at (0, 0)
            {\usebeamerfont{title}\inserttitle\par}}] {};
        \end{tikzpicture}
    \end{beamercolorbox}
    \vskip1em\par
    \begin{beamercolorbox}[sep=8pt,center]{author}
        \usebeamerfont{author}\insertauthor
    \end{beamercolorbox}
    \begin{beamercolorbox}[sep=8pt,center]{institute}
        \usebeamerfont{institute}\insertinstitute
    \end{beamercolorbox}
    \begin{beamercolorbox}[sep=8pt,center]{date}
        \usebeamerfont{date}\insertdate
    \end{beamercolorbox}\vskip0.5em
    {\usebeamercolor[fg]{titlegraphic}\inserttitlegraphic\par}
    \vfill
}

这些是标题页的结果：

封面

看起来真的很棒！！

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