tex 进度条

documentclass{beamer}
usepackage{tikz}
usetikzlibrary{calc}

definecolor{pbblue}{HTML}{0A75A8}% filling color for the progress bar
definecolor{pbgray}{HTML}{575757}% background color for the progress bar

makeatletter
defprogressbar@progressbar{} % the progress bar

ewcountprogressbar@tmpcounta% auxiliary counter

ewcountprogressbar@tmpcountb% auxiliary counter

ewdimenprogressbar@pbht %progressbar height

ewdimenprogressbar@pbwd %progressbar width

ewdimenprogressbar@tmpdim % auxiliary dimension

progressbar@pbwd=linewidth
progressbar@pbht=1.5ex

% the progress bar
defprogressbar@progressbar{%

    progressbar@tmpcounta=insertframenumber
    progressbar@tmpcountb=inserttotalframenumber
    progressbar@tmpdim=progressbar@pbwd
    multiplyprogressbar@tmpdim by progressbar@tmpcounta
    divideprogressbar@tmpdim by progressbar@tmpcountb

  egin{tikzpicture}[rounded corners=2pt,very thin]

    shade[top color=pbgray!20,bottom color=pbgray!20,middle color=pbgray!50]
      (0pt, 0pt) rectangle ++ (progressbar@pbwd, progressbar@pbht);

      shade[draw=pbblue,top color=pbblue!50,bottom color=pbblue!50,middle color=pbblue] %
        (0pt, 0pt) rectangle ++ (progressbar@tmpdim, progressbar@pbht);

    draw[color=normal text.fg!50]  
      (0pt, 0pt) rectangle (progressbar@pbwd, progressbar@pbht) 
        node[pos=0.5,color=normal text.fg] {	extnormal{%
             pgfmathparse{insertframenumber*100/inserttotalframenumber}%
             pgfmathprintnumber[fixed,precision=2]{pgfmathresult}\,\%%
        }%
    };
  end{tikzpicture}%
}

addtobeamertemplate{headline}{}
{%
  egin{beamercolorbox}[wd=paperwidth,ht=4ex,center,dp=1ex]{white}%
    progressbar@progressbar%
  end{beamercolorbox}%
}
makeatother

egin{document}

egin{frame}
test
end{frame}

egin{frame}
test
end{frame}

egin{frame}
test
end{frame}

egin{frame}
test
end{frame}

end{document}