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% ======================================================
% compatibility with PGF 2.0
\def\pgfkeysaddvalue#1#2#3{%
{%
\toks0{#2}%
\pgfkeysifdefined{#1}
{\pgfkeys@temptoks\expandafter\expandafter\expandafter{\csname pgfk@#1\endcsname}}%
{\pgfkeys@temptoks{}}%
\toks1{#3}%
\xdef\pgfkeys@global@temp{\the\toks0 \the\pgfkeys@temptoks \the\toks1}% believe or don't: the spaces are important
}%
\pgfkeyslet{#1}\pgfkeys@global@temp%
}
\def\pgfkeys@try{%
\pgfkeysifdefined{\pgfkeyscurrentpath/.@cmd}%
{%
\pgfkeysgetvalue{\pgfkeyscurrentpath/.@cmd}{\pgfkeys@code}%
\ifx\pgfkeyscurrentvalue\pgfkeysnovalue@text% Hmm... no value
\pgfkeysifdefined{\pgfkeyscurrentpath/.@def}%
{\pgfkeysgetvalue{\pgfkeyscurrentpath/.@def}{\pgfkeyscurrentvalue}}
{}% no default, so leave it
\fi%
\let\pgfkeyscurrentkey=\pgfkeyscurrentpath% make sure that \pgfkeys@code doesn't know about 'try'. Important for .is choice
% FIXME: maybe there are more things like that - also adjust currentname!?
\expandafter\pgfkeys@code\pgfkeyscurrentvalue\pgfeov%
\pgfkeyssuccesstrue%
}%
{%
\pgfkeysifdefined{\pgfkeyscurrentpath}%
{%
\ifx\pgfkeyscurrentvalue\pgfkeysnovalue@text%
\pgfkeysvalueof{\pgfkeyscurrentpath}%
\else%
\pgfkeyslet{\pgfkeyscurrentpath}\pgfkeyscurrentvalue%
\fi%
\pgfkeyssuccesstrue%
}%
{\pgfkeyssuccessfalse}%
}%
}
% ======================================================
% pgfutil@loop (from plain.tex)
\def\pgfutil@loop#1\pgfutil@repeat{\def\pgfutil@body{#1}\pgfutil@iterate}
\def\pgfutil@iterate{\pgfutil@body \let\pgfutil@next\pgfutil@iterate \else\let\pgfutil@next\relax\fi \pgfutil@next}
\let\pgfutil@repeat=\fi % this makes \loop...\if...\repeat skippable
\def\pgfqpointxy#1#2{%
\pgf@x=#1\pgf@xx%
\advance\pgf@x by #2\pgf@yx%
\pgf@y=#1\pgf@xy%
\advance\pgf@y by #2\pgf@yy}
\def\pgfqpointxyz#1#2#3{%
\pgf@x=#1\pgf@xx%
\advance\pgf@x by #2\pgf@yx%
\advance\pgf@x by #3\pgf@zx%
\pgf@y=#1\pgf@xy%
\advance\pgf@y by #2\pgf@yy%
\advance\pgf@y by #3\pgf@zy}
\def\pgfcoordinate#1#2{%
\edef\pgf@temp{#1}%
\ifx\pgf@temp\pgfutil@empty% do nothing
\else%
\pgf@process{\pgfpointtransformed{#2}}%
\expandafter\gdef\csname pgf@sh@ns@#1\endcsname{coordinate}%
\expandafter\xdef\csname pgf@sh@np@#1\endcsname{%
\noexpand\def\noexpand\centerpoint{\noexpand\pgfqpoint{\the\pgf@x}{\the\pgf@y}}%
}
\expandafter\gdef\csname pgf@sh@nt@#1\endcsname{{1}{0}{0}{1}{0pt}{0pt}}%
\expandafter\global\expandafter\let\csname pgf@sh@ma@#1\endcsname\pgfutil@empty%
\expandafter\gdef\csname pgf@sh@pi@#1\endcsname{\pgfpictureid}%
\fi%
}
% ======================================================
\def\pgfutilensuremath#1{%
\ifmmode#1\else$#1$\fi
}
\tikzoption{ybar}[]{\let\tikz@plot@handler=\pgfplothandlerybar}
\tikzoption{xbar}[]{\let\tikz@plot@handler=\pgfplothandlerxbar}
\tikzoption{ybar interval}[]{\let\tikz@plot@handler=\pgfplothandlerybarinterval}
\tikzoption{xbar interval}[]{\let\tikz@plot@handler=\pgfplothandlerxbarinterval}
\tikzoption{const plot}[]{\let\tikz@plot@handler=\pgfplothandlerconstantlineto}
\tikzoption{const plot mark left}[]{\let\tikz@plot@handler=\pgfplothandlerconstantlineto}
\tikzoption{const plot mark right}[]{\let\tikz@plot@handler=\pgfplothandlerconstantlinetomarkright}
\tikzoption{jump mark right}[]{\let\tikz@plot@handler=\pgfplothandlerjumpmarkright}
\tikzoption{jump mark left}[]{\let\tikz@plot@handler=\pgfplothandlerjumpmarkleft}
\tikzoption{mark}{
\def\tikz@plot@mark{#1}%
\def\tikz@temp{none}% this check is relatively new
\ifx\tikz@temp\tikz@plot@mark
\let\tikz@plot@mark=\pgfutil@empty
\fi
}
% the 'every mark' style is new:
\tikzset{
every mark/.style={},
mark options/.style={%
every mark/.style={#1}%
}}
\def\tikz@@@plot{%
\def\pgfplotlastpoint{\pgfpointorigin}%
\tikz@plot@handler%
\tikz@plot@data%
\global\let\tikz@@@temp=\pgfplotlastpoint%
\ifx\tikz@plot@mark\pgfutil@empty%
\else%
% Marks are drawn after the path.
\setbox\tikz@figbox=\hbox{%
\unhbox\tikz@figbox%
\hbox{{%
\pgfinterruptpath%
\pgfscope%
\let\tikz@options=\pgfutil@empty%
\let\tikz@transform=\pgfutil@empty%
\tikzset{every mark}%
\tikz@options%
\ifx\tikz@mark@list\pgfutil@empty%
\pgfplothandlermark{\tikz@transform\pgfuseplotmark{\tikz@plot@mark}}%
\else
\pgfplothandlermarklisted{\tikz@transform\pgfuseplotmark{\tikz@plot@mark}}{\tikz@mark@list}%
\fi
\tikz@plot@data%
\endpgfscope
\endpgfinterruptpath%
}}%
}%
\fi%
\global\setbox\tikz@tempbox=\copy\tikz@figbox%
%\global\let\tikz@after@path@smuggle=\tikz@after@path
\endgroup%
\setbox\tikz@figbox=\box\tikz@tempbox%
\tikz@make@last@position{\tikz@@@temp}%
%\expandafter\tikz@scan@next@command\tikz@after@path@smuggle%
\tikz@scan@next@command%
}
% ======================================================
\newif\ifpgfmathcomparison
% Assigns \pgfmathresult to 1.0 if #1 ~= #1.
%
% It will also set the boolean \ifpgfmathcomparison accordingly
% (globally).
\def\pgfmathapproxequalto#1#2{%
\edef\pgfmath@marshal{%
\noexpand\pgfmathparse{#2}
\noexpand\let\noexpand\pgfmath@arg\noexpand\pgfmathresult%
\noexpand\pgfmathparse{#1}%
}%
\pgfmath@marshal%
\pgfmathapproxequalto@{\pgfmathresult}{\pgfmath@arg}}
\def\pgfmathapproxequalto@#1#2{%
\begingroup%
\pgfmath@x#1pt%
\pgfmath@y#2pt%
\advance\pgfmath@x-\pgfmath@y%
\ifdim\pgfmath@x<0pt
\multiply\pgfmath@x by-1
\fi
\ifdim\pgfmath@x<0.0001pt\relax%
\def\pgfmathresult{1.0}%
\global\pgfmathcomparisontrue
\else%
\def\pgfmathresult{0.0}%
\global\pgfmathcomparisonfalse
\fi%
\pgfmath@smuggleone\pgfmathresult
\endgroup%
}
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