我想编写一个scaleblock
带有 2 个参数title
和 的宏content
。可以像这样调用它:
\begin{scaleblock}{a_title}
a_content
\end{scaleblock}
它等效于以下内容:
\begin{block}{\scalebox{0.8}{a_title}}
\scalebox{0.8}{\vbox{a_content}}
\end{block}
有人知道如何编写这种宏(使用\begin
和\end
)吗?
答案1
你可以像定义宏一样定义环境。只不过\newcommand\mycmd[1]{...#1...}
你不必写成
\newenvironment{myenv}[1]{Begin...#1...}{End}
这里的最后两个参数说明应该在内容之前和之后放置什么。
这意味着第一次尝试是写
\newenvironment{scaleblock}[1]{\begin{block}{\scalebox{0.4}{#1}}
\scalebox{0.4}{\vbox{}%
{}}
\end{block}}
但这并未反映出参数的预期嵌套,实际上您只给出了环境的开始部分,而结束部分是第四行的换行符。
因此,对于您来说,最好先收集环境主体内的所有内容,然后使用它。这可以通过包来完成。它提供了可用于访问这些内容的environ
命令。假设是来自的命令,您可以执行以下操作:\NewEnviron
\BODY
block
beamer
\usepackage{environ}
\NewEnviron{scaleblock}[1]{\begin{block}{\scalebox{0.8}{#1}}
\scalebox{0.8}{\vbox{\BODY}}
\end{block}}
答案2
这是一个“纯 LaTeX”版本:
\newsavebox{\scaleblockbox}
\newenvironment{scaleblock}[1]
{\begin{block}{\scalebox{0.8}{#1}
\begin{lrbox}{\scaleblockbox}
\begin{minipage}{\textwidth}}
{\end{minipage}
\end{lrbox}
\scalebox{0.8}{\usebox{\scaleblockbox}}
\end{block}}
答案3
您可以使用按键进行更好的控制:
\krdmakekeys[
prefix=KV,
family=collectbody,
hp=mp,
initialize,
endlinechar=-1
]{%
cmd/title//,
zcmd/title scale/1,
zcmd/body scale/1,
cmd/width/\textwidth,
zcmd/title text style//,
zcmd/body text style//,
cmd/action//
}
\newsavebox{\boxbody}
\newenvironment{collectbody}[1][]{%
\krdusekeys[prefix=KV,family=collectbody]{#1}%
\ifx\mptitle\@empty\else\krdafterfi
\begin{center}%
\scalebox{\mptitlescale}{\mptitletextstyle\mptitle}%
\end{center}%
\fi
\begin{lrbox}{\boxbody}%
\begin{minipage}{\mpwidth}%
\mpbodytextstyle\mpaction
}{%
\end{minipage}%
\end{lrbox}%
\scalebox{\mpbodyscale}{\usebox{\boxbody}}%
}
这可以用作:
\documentclass{article}
\usepackage[dvipsname]{xcolor}
\usepackage{graphicx}
\usepackage{lipsum}
\begin{collectbody}[
title=Example of collect body,
title scale=.8,
title text style=\ttfamily\color{red}
]
\lipsum[1]
\end{collectbody}
\end{document}
编辑(2012/08/23)
上述代码基于键盘阅读器不在 CTAN 上的软件包。以下是基于鍵盤。
\documentclass{standalone}
\usepackage[dvipsname]{xcolor}
\usepackage{graphicx}
\usepackage{pgfkeys}
\usepackage{lipsum}
\makeatletter
\def\pgfkeysafterfi#1\fi{\fi#1}
\def\pgfkeysafterelse@i#1\else#2\fi{\fi#1}
\def\pgfkeysifkeydefined#1#2#3{%
\ifcsname pgfk@#1/.@cmd\endcsname
\pgfkeysafterelse@i{#2}\else\pgfkeysafterfi{#3}\fi
}
\pgfkeys{
/handlers/.protected estore in/.code=
\pgfkeys{
\pgfkeyscurrentpath/.code=\protected@edef#1{##1}
},
/handlers/.default and initial/.code=
\pgfkeys{
\pgfkeyscurrentpath/.initial=#1,
\pgfkeyscurrentpath/.default=#1,
\pgfkeyscurrentpath=#1%
},
/handlers/.new key/.code 2 args=
\pgfkeysifkeydefined{\pgfkeyscurrentpath}{%
\@latexerr{Key '\pgfkeyscurrentpath' already exists}\@ehd
}{%
\pgfkeys{
\pgfkeyscurrentpath/.store in=#1,
\pgfkeyscurrentpath/.default and initial=#2%
}%
}%
}
\pgfkeys{%
/collectbody/.is family,/collectbody/.cd,
title/.new key=\mptitle\@empty,
title scale/.new key=\mptitlescale{1},
body scale/.new key=\mpbodyscale{1},
width/.new key=\mpwidth\textwidth,
title text style/.new key=\mptitletextstyle\@empty,
body text style/.new key=\mpbodytextstyle\@empty,
action/.new key=\mpaction\@empty
}
\def\@@empty{\@empty}
\newsavebox{\boxbody}
\newenvironment{collectbody}[1][]{%
\pgfkeys{/collectbody/.cd,#1}%
\ifx\mptitle\@@empty\else\pgfkeysafterfi
\begin{center}%
\scalebox{\mptitlescale}{\mptitletextstyle\mptitle}%
\end{center}%
\fi
\begin{lrbox}{\boxbody}%
\begin{minipage}{\mpwidth}%
\mpbodytextstyle\mpaction
}{%
\end{minipage}%
\end{lrbox}%
\scalebox{\mpbodyscale}{\usebox{\boxbody}}%
}
\makeatother
% Example:
\begin{document}
\begin{collectbody}[
title=Example of \texttt{collect body} environment,
title scale=.8,
title text style=\scshape\color{red}
]
\lipsum[1]
\end{collectbody}
\end{document}