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%--------------------------------------------
%
% Package pgfplots, library for high-level coordinates.
%
% Copyright 2007/2008/2009 by Christian Feuersänger.
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
%
%--------------------------------------------
\pgfutil@usemodule{pgfcalendar}
% Idea: allow
%--------------------------------------------------
% \begin{tikzpicture}
% \begin{axis}[
% date coordinates in=x,
% xticklabel={\day.\month.},
% ]
% \addplot coordinates {
% (2008-01-5, 5)
% (2008-01-12, 10)
% (2008-01-16, 20)
% };
% \end{axis}
% \end{tikzpicture}
%--------------------------------------------------
\def\pgfplotslibdateplot@number@to@julian@and@time#1.#2\julianto#3\hourto#4\minuteto#5{%
#3=#1
\pgf@xa=0.#2pt
\multiply\pgf@xa by24
\afterassignment\pgfplots@gobble@until@relax
\c@pgf@countb=\the\pgf@xa\relax
\edef#4{\the\c@pgf@countb}%
\advance\pgf@xa by-#4pt
\multiply\pgf@xa by60
\afterassignment\pgfplots@gobble@until@relax
\c@pgf@countb=\the\pgf@xa\relax
% round minutes (we may loose precision here)
\advance\pgf@xa by-\the\c@pgf@countb pt
\ifdim\pgf@xa>0.5pt
\advance\c@pgf@countb by1
\ifnum\c@pgf@countb=60
\c@pgf@countb=#4 %
\advance\c@pgf@countb by1
\edef#4{\the\c@pgf@countb}%
\c@pgf@countb=0
\fi
\fi
\edef#5{\the\c@pgf@countb}%
}
% #1 the date
% #2 the hours
% #3 the minutes
% #4 is either empty or is the seconds.
% #5 a macro which will be filled with the date part.
% #6 the macro which will contain a number in the range [0,1]
% representing hours and minutes.
%
% If you don't have seconds, you have to provide the second ':' sign
% as dummy! In that case #4 will be empty.
\def\pgfplotslibdateplot@map@time#1 #2:#3:#4\dateto#5\timeto#6{%
\pgf@xa=#2pt
\divide\pgf@xa by24
\pgf@xb=#3pt
\divide\pgf@xb by1440
\advance\pgf@xa by\pgf@xb
\ifdim\pgf@xa<0pt
\pgf@xa=0pt
\else
\ifdim\pgf@xa>1pt
\pgf@xa=1pt
\fi
\fi
\def#5{#1}%
\edef#6{\pgf@sys@tonumber\pgf@xa}%
}%
\def\pgfplotslibdateplot@discard@zero@dot 0.#1\to#2{\def#2{#1}}%
\pgfplotsset{
/pgfplots/date ZERO/.code={%
\begingroup
\pgfcalendardatetojulian{#1}\c@pgf@counta
\edef\pgfmathresult{\the\c@pgf@counta}%
\pgfmath@smuggleone\pgfmathresult
\endgroup
\let\pgfplots@calender@ZEROSHIFT=\pgfmathresult
},
date ZERO=2006-01-01,
/pgfplots/date coordinates in/.code={%
\pgfkeysdef{/pgfplots/#1 coord trafo}{%
\begingroup
\edef\pgfplotstempjuliandate{##1}%
% check if we also have a TIME like '2006-01-01 11:21'
\expandafter\pgfutil@in@\expandafter:\expandafter{\pgfplotstempjuliandate}%
\ifpgfutil@in@
% we have a TIME!
\expandafter\pgfplotslibdateplot@map@time\pgfplotstempjuliandate:\dateto\pgfplotstempjuliandate\timeto\pgfplotstemptime
\else
\let\pgfplotstemptime=\pgfutil@empty
\fi
\expandafter\pgfcalendardatetojulian\expandafter{\pgfplotstempjuliandate}\c@pgf@counta
\advance\c@pgf@counta by-\pgfplots@calender@ZEROSHIFT\relax
\ifx\pgfplotstemptime\pgfutil@empty
% no time:
\edef\pgfmathresult{\the\c@pgf@counta}%
\else
% add time fraction (which should be in the range
% [0,1]).
\ifdim\pgfplotstemptime pt<1pt
% discard prefix '0.':
\expandafter\pgfplotslibdateplot@discard@zero@dot\pgfplotstemptime\to\pgfplotstemptime
\edef\pgfmathresult{\the\c@pgf@counta.\pgfplotstemptime}%
\else
% assume \pgfplotstemptime=1pt :
\advance\c@pgf@counta by1
\edef\pgfmathresult{\the\c@pgf@counta}%
\fi
\fi
\pgfmath@smuggleone\pgfmathresult
\endgroup
}%
\pgfkeysdef{/pgfplots/#1 coord inv trafo}{%
\begingroup
\pgfplotslibdateplot@number@to@julian@and@time##1\julianto{\c@pgf@counta}\hourto\Hour\minuteto\Minute%
\advance\c@pgf@counta by\pgfplots@calender@ZEROSHIFT\relax
\expandafter\pgfcalendarjuliantodate\expandafter{\the\c@pgf@counta}\year\month\day
\xdef\pgfplotslibdateplot@TMP{%
\noexpand\def\noexpand\year{\year}%
\noexpand\def\noexpand\month{\month}%
\noexpand\def\noexpand\day{\day}%
\noexpand\def\noexpand\Hour{\Hour}%
\noexpand\def\noexpand\Minute{\Minute}%
}%
\endgroup
\pgfplotslibdateplot@TMP
\let\hour=\Hour
\let\minute=\Minute
\ifnum\hour<10
\edef\hour{0\hour}%
\fi
\ifnum\minute<10
\edef\minute{0\minute}%
\fi
\def\Second{0}%
\def\second{00}%
\edef\lowlevel{##1}%
\pgfkeysifdefined{/pgfplots/date default inv/#1}{%
\edef\pgfmathresult{\pgfkeysvalueof{/pgfplots/date default inv/#1}}%
}{%
\edef\pgfmathresult{\year-\month-\day\space\hour:\minute:\second}%
}%
}%
\pgfkeysifdefined{/pgfplots/#1ticklabel/.@cmd}{%
\pgfkeysalso{%
/pgfplots/#1ticklabel={\tick},%
/pgfplots/scaled #1 ticks=false,%
/pgfplots/plot coordinates/math parser=false,%
}%
}{%
% OK. The style can be used for other coordinates as well
% (like hist/data)
}%
%
\pgfkeysifdefined{/pgfplots/#1 is expr}{%
\pgfkeyssetvalue{/pgfplots/#1 is expr}{0}%
}{}%
%
% Allow a callback (optional)
\pgfkeysifdefined{/pgfplots/#1/@execute on coord trafo changed/.@cmd}{%
\pgfkeysalso {/pgfplots/#1/@execute on coord trafo changed}%
}{}%
},
/pgfplots/date coordinates in/.value required,
%
% #1: the argument for 'data coordinates in={#1}
% #2: the default for the inverse transformation. If there is
% none, a default will be chosen automatically (with full
% information)
/pgfplots/date coordinates default inverse/.style 2 args={%
/pgfplots/date default inv/#1/.initial=#2,
},
/pgfplots/date coordinates default inverse={x}{\year-\month-\day},
/pgfplots/date coordinates default inverse={y}{\year-\month-\day},
/pgfplots/date coordinates default inverse={z}{\year-\month-\day},
}
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