tikz-theorem

代码如下:

\documentclass{book}
\usepackage{tikz}
\usepackage{xcolor}
\usepackage{environ}
\usepackage{amsmath,mathrsfs,amsfonts}
\usepackage{xparse}

\usetikzlibrary{shapes,decorations}
\definecolor{bule}{RGB}{18,29,57}
\definecolor{bablue}{RGB}{248,248,248}
\definecolor{main}{RGB}{127,191,51}
\definecolor{seco}{RGB}{0,145,215}
\definecolor{thid}{RGB}{180,27,131}


\newcommand{\newfancytheoremstyle}[5]{%
  \tikzset{#1/.style={draw=#3, fill=#2,very thick,rectangle,
      rounded corners, inner sep=10pt, inner ysep=20pt}}
  \tikzset{#1title/.style={fill=#3, text=#2}}
  \expandafter\def\csname #1headstyle\endcsname{#4}
  \expandafter\def\csname #1bodystyle\endcsname{#5}
}

\newfancytheoremstyle{fancythrm}{blue!10}{seco}{\bfseries\sffamily}{\sffamily}

\makeatletter
\DeclareDocumentCommand{\newfancytheorem}{ O{\@empty} m m m O{fancythrm} }{%
  % define the counter for the theorem
  \ifx#1\@empty
    \newcounter{#2}
  \else
    \newcounter{#2}[#1]
    \numberwithin{#2}{#1}
  \fi
  %% define the "newthem" environment
  \NewEnviron{#2}[1][{}]{%
    \noindent\centering
    \begin{tikzpicture}
      \node[#5] (box){
        \begin{minipage}{0.93\columnwidth}
          \csname #5bodystyle\endcsname \BODY~##1
        \end{minipage}};
      \node[#5title, right=10pt] at (box.north west){
        {\csname #5headstyle\endcsname #3 \stepcounter{#2}\csname the#2\endcsname\; ##1}};
      \node[#5title, rounded corners] at (box.east) {#4};
    \end{tikzpicture}
  }[\par\vspace{.5\baselineskip}]
}
\makeatother

% Define new styles
% \newfancytheoremstyle{<name>}{inner color}{outer color}{head style}{body style}
\newfancytheoremstyle{fancydef}{green!10}{green}{\itshape\sffamily}{\sffamily}

% Define some new environments
% \newfancytheorem[<number within>]{<name>}{<head>}{<symbol>}[<style>]
\newfancytheorem[chapter]{newthem}{Theorem}{$\clubsuit$}
\newfancytheorem[section]{newcor}{Corollary}{$\heartsuit$}

\newfancytheorem{newdef}{Definition}{$\spadesuit$}[fancydef]

\begin{document}

\begin{newthem}
    test
\end{newthem}

\begin{newcor}
  test
\end{newcor}

\begin{newdef}
  test
\end{newdef}

\end{document}

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