I wanted to put your TikZ code in a beamer presentation and got an error which is puzzling me.
%\documentclass[12pt]{article}
\documentclass{beamer}
\usepackage[latin1]{inputenc}
\usepackage{cmbright}
\usepackage[pdftex,margin=0pt,noheadfoot]{geometry}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows,shadows,positioning,calc}
\colorlet{HEAD}{gray!50}
\colorlet{branch}{orange!50}
\colorlet{commit}{green!50}
\colorlet{index}{blue!40}
\colorlet{work}{red!40}
\colorlet{old HEAD}{HEAD!50}
\colorlet{old branch}{branch!50}
% Global Scaling Factors
% Values that seem reasonable:
% 1cm / 1pt / \Large
% .5cm / .5pt / \scriptsize
\newlength\g
\setlength\g{1cm}
\newlength\gLine
\setlength\gLine{1pt}
\newcommand\gFont{\Large}
\geometry{papersize={24\g,14\g}}
\tikzset{
index/.style={rectangle, text width=5\g, text centered, rounded corners,
minimum height=1.5\g, line width=3\gLine, fill=#1!50, draw=#1},
index/.default={index},
history/.style={index=commit, fill=commit!40},
work/.style={index=work},
%
object/.style={rectangle, text width=2\g, text centered, rounded corners,
minimum height=1\g, line width=3\gLine, fill=#1!50, draw=#1},
object/.default={red},
commit/.style={object=commit, fill=commit!40},
new commit/.style={commit, double shadow},
branch/.style={object=branch},
HEAD/.style={object=HEAD},
old branch/.style={object=old branch, text=black!30},
old HEAD/.style={object=old HEAD, text=black!30},
attached HEAD/.style={HEAD, minimum height=2\g},
attached HEAD label/.style={object, draw=none, fill=none},
old attached HEAD/.style={old HEAD, minimum height=2\g},
old attached HEAD label/.style={attached HEAD label, text=black!30},
%
double shadow/.style={
preaction={fill=#1,transform canvas={xshift=.2\g,yshift=-.2\g}},
preaction={fill=#1,transform canvas={xshift=-.2\g,yshift=.2\g}},
},
double shadow/.default={yellow!75},
%
line/.style={>=stealth', line width=1.5\gLine, draw=black!70, auto=right,
bend right},
object line/.style={>=stealth, line width=1.5\gLine},
commit line/.style={object line, color=commit},
new commit line/.style={commit line},
HEAD line/.style={object line, color=HEAD},
branch line/.style={object line, color=branch},
old HEAD line/.style={object line, color=old HEAD},
old branch line/.style={object line, color=old branch},
cancel ref/.style={cross out, draw=black!70, line width=1\gLine},
%
background line/.style={draw=white, line width=6\gLine,
shorten >=6\gLine, shorten <=6\gLine},
%
cmd/.style={color=black, font={\gFont\ttfamily}},
%
main/.style={node distance=.7\g, bend angle=35, font={\gFont},
x=1.5\g, y=1.5\g},
every edge/.style={draw, ->},
}
\pgfdeclarelayer{HEAD}
\pgfsetlayers{HEAD,main}
\newcommand\boundingbox{\clip (-.5\textwidth,-.5\textheight) rectangle
(.5\textwidth,.5\textheight);}
\newcommand\historynode[1][0,.5]{\node [history] (head) at (#1) {History};}
\newcommand\indexnode[1][0,-1]{\node [index] (index) at (#1) {Stage (Index)};}
\newcommand\worknode[1][0,-2.5]{\node [work] (work) at (#1) {Working Directory};}
\newcommand\normalcommits[1][-6,.75]{
\commitTerminal cT at (#1);
\commit a47c3 (A) -> cT;
\commit b325c (B) -> A;
\commit c10b9 (C) -> B;
\commit da985 (D) -> C;
\commit ed489 (E) -> D;
}
\newcommand\usualsetup{
\normalcommits
\indexnode
\worknode
}
\def\ref [#1] "#2" : #3 -> #4;{
\node [#1, above=.4\g of #4] (#3) {#2};
\path [#1 line] (#3) edge (#4);
}
\def\oldref [#1] "#2" : #3 -> #4;{
\ref [old #1] "#2" : old #3 -> #4;
\node [cancel ref, above=.2\g of #4, anchor=center] {};
}
\def\refbelow [#1] "#2" : #3 -> #4;{
\node [#1, below=.4\g of #4] (#3) {#2};
\path [#1 line] (#3) edge (#4);
}
\newcounter{tmp}
\def\commitTerminal #1 at (#2);{
\node (#1) at (#2) {\LARGE$\cdots$};
\pgfkeys{/child count/#1/.initial=0}
}
\def\commitcommon [#1] #2 (#3) -> [#4] #5;{
\setcounter{tmp}{\pgfkeysvalueof{/child count/#5}}
\node [#1, anchor=west] (#3) at ($ (#5.east) + (.5,\value{tmp}) $) {#2};
\draw [#4] (#3) edge (#5);
\addtocounter{tmp}{1}
\pgfkeys{/child count/#3/.initial=0}
\pgfkeys{/child count/#5=\value{tmp}}
}
\def\commit #1 (#2) -> #3;{\commitcommon [commit] #1 (#2) -> [commit line] #3;}
\def\newcommit #1 (#2) -> #3;{\commitcommon [new commit] #1 (#2) ->
[new commit line] #3;}
\def\branch #1 -> #2;{\ref [branch] "#1" : #1 -> #2;}
\def\oldbranch #1 -> #2;{\oldref [branch] "#1" : #1 -> #2;}
\def\addHEAD [#1] "#2" : #3 -> #4;{
\begin{pgfonlayer}{HEAD}
\node [#1, anchor=south] (#3) at (#4.south) {};
\node [#1 label, anchor=south] (#3 label) at ($(#4.north)+(0,-3\gLine)
$) {#2};
\end{pgfonlayer}
}
\def\addHEADbelow [#1] "#2" : #3 -> #4;{
\begin{pgfonlayer}{HEAD}
\node [#1, anchor=north] (#3) at (#4.north) {};
\node [#1 label, anchor=north] (#3 label) at ($(#4.south)+(0,3\gLine)
$) {#2};
\end{pgfonlayer}
}
\def\HEAD -> #1;{\addHEAD [attached HEAD] "HEAD" : HEAD -> #1;}
\def\oldHEAD -> #1;{\addHEAD [old attached HEAD] "HEAD" : old HEAD -> #1;}
\def\detachedHEAD -> #1;{\ref [HEAD] "HEAD" : HEAD -> #1;}
\def\olddetachedHEAD -> #1;{\oldref [HEAD] "HEAD" : HEAD -> #1;}
\pagestyle{empty}
\setlength{\parindent}{0pt}
\begin{document}
\begin{tikzpicture}[main]
\boundingbox
\usualsetup
\branch maint -> A;
\branch master -> E;
\HEAD -> master;
\path [>=stealth', draw=black!50, very thick]
(5,3.75) node {reference to current branch} edge [->] (HEAD label)
(6.5,2) node {current branch} edge [->] (master)
(-5,3) node {another branch} edge [->] (maint)
(-5,-0.5) node {files to go in next commit} edge [->] (index)
(-5,-2) node {files that you ``see''} edge [->] (work)
(5,-1) node [text width=6\g, text badly centered]
{commit objects, identified by SHA-1 hash}
edge [->] (E)
edge [->] (D)
edge [->] (C)
(-1,2.25) node {child points to parent} edge [->] ($ (B)!.5!(C) $)
;
\end{tikzpicture}
\end{document}
common.tex|163 warning| LaTeX Warning: Reference `[' on page 1 undefined on input line 163.
common.tex|164 warning| LaTeX Warning: Reference `[' on page 1 undefined on input line 164.
common.tex|165 error| Package pgf Error: No shape named `master' is known.
common.tex|165 error| Package pgf Error: No shape named `master' is known.
common.tex|169 error| Package pgf Error: No shape named `master' is known.
common.tex|169 error| Package pgf Error: No shape named `master' is known.
common.tex|170 error| Package pgf Error: No shape named `maint' is known.
common.tex|170 error| Package pgf Error: No shape named `maint' is known.
It would be great to use your custom code in LaTeX presentations.
Maybe you have a clue ?
Thanks again for your time.