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+%D \module
+%D [ file=t-gantt-tikz,
+%D version=2011.08.27,
+%D title=\CONTEXT\ User Module,
+%D subtitle=Drawing gantt diagrams,
+%D author={Adam Reviczky},
+%D date=\currentdate,
+%D copyright=Adam Reviczky,
+%D license=GNU GPL 2.0]
+
+%D Some macros for drawing gantt diagrams using TikZ.
+%D
+%D Adam Reviczky, 27.08.2011 (Version 2.1)
+%D Andrés Silva Marambio, 20.03.2011 (Version 1.3)
+%D Alan Munn, Martin Kumm, 14.03.2011 (Version 1.2)
+
+\writestatus{loading}{ConTeXt User Module / Drawing gantt diagrams}
+
+\startmodule[gantt-s-tikz]
+\unprotect
+
+\def\????gantt-tikz{@@@@gantt-tikz}
+
+\usemodule[tikz,pgffor]
+\usetikzlibrary[arrows,patterns]
+
+\definesystemvariable{gantt}
+
+\newcount\ganttnum
+\newcount\gantttitlenum
+\newcount\ganttwidth
+
+\newdimen\ganttlastx \ganttlastx = 0cm
+\newdimen\nextganttlastx
+\newdimen\titleunitlength \titleunitlength = 1cm
+\newdimen\ganttunitlength \ganttunitlength = 1cm
+
+\newdimen\gantttmpa
+\newdimen\gantttmpb
+
+\def\setupgantt
+ {\bgroup
+ \catcode`\#=\@@other
+ \dosingleempty
+ \dosetupgantt}
+
+\def\dosetupgantt[#1]%
+ {\egroup
+ \getparameters[\??gantt][#1]}
+
+\setupgantt
+ [xunitlength=1cm,
+ fontsize=\tf,
+ titlefontsize=\tfx,
+ drawledgerline=false]
+
+\def\setupganttbar
+ {\bgroup
+ \catcode`\#=\@@other
+ \dosingleempty
+ \dosetupganttbar}
+
+\def\dosetupganttbar[#1]%
+ {\egroup
+ \getparameters[\??gantt][#1]}
+
+\setupganttbar
+ [pattern=north east lines,
+ color=black]
+
+% The gantt environment draws the canvas of a gantt figure (realized as tikzpicture)
+% The usage is \startgantt[...]{no of Tasks to plot}{no of time slots}
+% The optional argument [...] can be filled in a key=value syntax, using one or more of the following keys:
+%
+% xunitlength - length of one time slot (default: 1 cm)
+% fontsize - fontsize of labels (default: \tf)
+% titlefontsize - fontsize of title section (default: \tfx)
+% drawledgerline - Switch to enable/disable the drawing of horizontal ledger lines (default value: false)
+
+\long\def\dostartgantt[#1]#2#3%
+ {\getparameters[\??gantt][#1]%
+ \gdef\v!ganttunitlength{\getvalue{@@ganttxunitlength}}
+ \gdef\v!fontsize{\getvalue{@@ganttfontsize}}
+ \gdef\v!titlefontsize{\getvalue{@@gantttitlefontsize}}
+ \gdef\v!drawledgerline{\@@ganttdrawledgerline}
+
+ \bgroup
+ \tikzstyle{time}=[coordinate]
+
+ \newcount\ganttx \ganttx=0
+ \newcount\ganttheight
+
+ \def\ganttxstringtop{}
+ \def\ganttxstringbottom{}
+
+ \global\ganttwidth=#3
+ \global\ganttnum=0
+
+ \ganttheight=#2
+ \advance\ganttheight by 1;
+
+ \draw (0,0.5) node[above] {\ganttxstringtop} -- (0,1.4-\ganttheight) node[below] {\ganttxstringbottom};
+ \draw (\ganttwidth*\v!ganttunitlength,0.5) node[above] {\ganttxstringtop} -- (\ganttwidth*\v!ganttunitlength,1.4-\ganttheight) node[below] {\ganttxstringbottom};
+
+ % draw grid
+ \foreach \!!t in {1,2,...,\ganttwidth}{
+ \draw[dotted] (\v!ganttunitlength*\!!t,-0.5) node[above] {\ganttxstringtop} -- (\v!ganttunitlength*\!!t,1.4-\ganttheight) node[below] {\ganttxstringbottom};
+ }
+
+ % draw x axis
+ \draw[] (0,-#2+0.4) -- (\ganttwidth*\v!ganttunitlength,-#2+0.4);
+ \egroup
+ }
+
+\def\startgantt%
+ {\starttikzpicture[draw=black,yscale=.7,xscale=1]
+ \dosingleempty\dostartgantt}
+
+\def\stopgantt%
+ {\stoptikzpicture}
+
+% ganttitle is the environment for drawing the title section
+\definestartstop[ganttitle][
+ before={
+ \ganttlastx = 0cm
+ },
+ after={
+ \ganttlastx = 0cm
+ \doglobal\decrement\ganttnum
+ }
+ ]
+
+% \titleelement draws one element of the title
+% usage: \titleelement{label}{length}
+\long\def\dotitleelement#1#2%
+ {\gantttmpa=\dimexpr\v!ganttunitlength*#2\relax
+ \divide\gantttmpa by 2;
+
+ \def\!!xoffset{1.5}
+
+ \draw (\ganttlastx,\ganttnum) rectangle (\ganttlastx+#2*\v!ganttunitlength,\ganttnum+0.6);
+ \node [text height=1.5ex,text depth=0.7ex] at (\ganttlastx+\gantttmpa-\!!xoffset,\ganttnum+0.25) {%
+ \getvalue{v!titlefontsize} #1%
+ };
+
+ \ganttlastx=\dimexpr\ganttlastx+\v!ganttunitlength*#2\relax
+ }
+
+\def\titleelement%
+ {\dotitleelement}
+
+% \numtitle draws a numbered sequence of title elements
+% usage: \numtitle{start number}{increment}{end number}{length of each title element}
+\long\def\donumtitle#1#2#3#4%
+ {\gantttitlenum=#1
+ \dostepwiserecurse{#1}{#3}{#2}{
+ \titleelement{\the\gantttitlenum}{#4}
+ \advance\gantttitlenum by #2;
+ }
+ }
+
+\def\numtitle%
+ {\donumtitle}
+
+% \ganttbar draws a single, unconnected bar for representing a task
+% usage: \ganttbar[pattern=<pattern>,color=<color>]{label}{start}{length}
+% where the optional comma separated arguments are:
+% pattern - is a tikz pattern (e.g. north east lines (default), north west lines, crosshatch, crosshatch dots, grid, ...)
+% color - a tikz color of the pattern (e.g. red, green blue gray, dark gray)
+% for more information see the tikz documentation
+\long\def\doganttbar[#1]#2#3#4%
+ {\bgroup
+ \getparameters[\??gantt][#1]%
+ \edef\v!pattern{\@@ganttpattern}
+ \edef\v!color{\@@ganttcolor}
+
+ \gantttmpa=\dimexpr\v!ganttunitlength*#3\relax
+ \gantttmpb=\dimexpr\v!ganttunitlength*#4+\gantttmpa\relax
+
+ \doif{\v!drawledgerline}{true}{
+ \draw[dotted] (0,\ganttnum-0.2) -- (\ganttwidth*\v!ganttunitlength,\ganttnum-0.2);
+ }
+ \node at (0,\ganttnum) [anchor=base east] {%
+ \getvalue{v!fontsize} #2%
+ };
+ \draw[pattern=\v!pattern,pattern color=\v!color] (\gantttmpa,\ganttnum+0.1) rectangle (\gantttmpb,\ganttnum+0.5);
+ \global\ganttlastx=\gantttmpb
+ \doglobal\decrement\ganttnum
+ \egroup
+ }
+
+\def\ganttbar
+ {\dosingleempty\doganttbar}
+
+% \ganttcon draws an arrow between to bars with specified coordinates
+% usage: \ganttcon{startx}{starty}{endx}{endy}
+\long\def\doganttcon#1#2#3#4%
+ {\bgroup
+ \draw[-latex,rounded corners=1pt] (#1*\v!ganttunitlength,-#2+0.1+0.2) -- (#1*\v!ganttunitlength+0.4*\v!ganttunitlength,-#2+0.1+0.2) -- (#1*\v!ganttunitlength+0.4*\v!ganttunitlength,-#2-0.4+0.2) -- (#1*\v!ganttunitlength-0.4*\v!ganttunitlength,-#2-0.4+0.2) -- (#1*\v!ganttunitlength-0.4*\v!ganttunitlength,-#4+0.1+0.2) -- (#3*\v!ganttunitlength,-#4+0.1+0.2);
+ \egroup
+ }
+
+\def\ganttcon
+ {\doganttcon}
+
+% \ganttbarcon draws a single bar *and* connects the bar with the previous bar for
+% consecutive tasks
+% usage: \ganttbarcon[pattern=<pattern>,color=<color>]{label}{start}{length}
+% where the optional pattern argument are the same as for \ganttbar
+\long\def\doganttbarcon[#1]#2#3#4%
+ {\bgroup
+ \getparameters[\??gantt][#1]%
+ \edef\v!pattern{\@@ganttpattern}
+ \edef\v!color{\@@ganttcolor}
+
+ \nextganttlastx = \dimexpr\ganttlastx+\ganttunitlength*1\relax
+ \ifdim\nextganttlastx>\dimexpr\v!ganttunitlength*#3\relax
+ \draw[-latex,rounded corners=1pt] (\ganttlastx,\ganttnum+1.1+0.2) -- (\ganttlastx+0.4*\v!ganttunitlength,\ganttnum+1.1+0.2) -- (\ganttlastx+0.4*\v!ganttunitlength,\ganttnum+0.6+0.2) -- (\ganttlastx-0.4*\v!ganttunitlength,\ganttnum+0.6+0.2) -- (\ganttlastx-0.4*\v!ganttunitlength,\ganttnum+0.1+0.2) -- (#3*\v!ganttunitlength,\ganttnum+0.1+0.2);
+ \else
+ \draw[-latex,rounded corners=1pt] (\ganttlastx,\ganttnum+1.1+0.2) -- (\ganttlastx+0.4*\v!ganttunitlength,\ganttnum+1.1+0.2) -- (\ganttlastx+0.4*\v!ganttunitlength,\ganttnum+0.1+0.2) -- (#3*\v!ganttunitlength,\ganttnum+0.1+0.2);
+ \fi
+
+ %hbox overfull!
+ \ganttbar[#1]{#2}{#3}{#4}
+ \egroup
+ }
+
+\def\ganttbarcon
+ {\dosingleempty\doganttbarcon}
+
+% \ganttgroup draws a bar to group tasks
+% usage: \ganttgroup{label}{start}{length}
+\long\def\doganttgroup#1#2#3%
+ {\bgroup
+ \gantttmpa=\dimexpr\v!ganttunitlength*#2\relax
+ \gantttmpb=\dimexpr\v!ganttunitlength*#3+\gantttmpa\relax
+
+ \doif{\v!drawledgerline}{true}{
+ \draw[dotted] (0,\ganttnum-0.2) -- (\ganttwidth*\v!ganttunitlength,\ganttnum-0.2);
+ }
+ \node at (0,\ganttnum) [anchor=base east] {%
+ \getvalue{v!fontsize}\bf #1%
+ };
+ \fill[black] (\gantttmpa-0.14cm,\ganttnum+0.2) rectangle (\gantttmpb+0.14cm,\ganttnum+0.4);
+ \draw[diamond-diamond] (\gantttmpa-0.14cm,\ganttnum+0.2) -- (\gantttmpb+0.14cm,\ganttnum+0.2);
+
+ \global\ganttlastx=\gantttmpb
+ \doglobal\decrement\ganttnum
+ \egroup
+ }
+
+\def\ganttgroup
+ {\doganttgroup}
+
+% \ganttmilestone, draw a diamond to represent a milestone
+% usage: \ganttmilestone[color=<color>]{label}{start}
+% color - a tikz color of the pattern (e.g. red, green blue gray, dark gray)
+% for more information see the tikz documentation
+
+% Declaring layers to abvoid superposition when you connect a \ganttmileston with a task
+\pgfdeclarelayer{background}
+\pgfdeclarelayer{foreground}
+\pgfsetlayers{background,main,foreground}
+
+\long\def\doganttmilestone[#1]#2#3%
+ {\bgroup
+ \getparameters[\??gantt][#1]%
+ \edef\v!color{\@@ganttcolor}
+
+ \gantttmpa=\dimexpr\v!ganttunitlength*#3\relax
+ \gantttmpb=\dimexpr\v!ganttunitlength*0+\gantttmpa\relax
+
+ \doif{\v!drawledgerline}{true}{
+ \draw[dotted] (0,\ganttnum-0.2) -- (\ganttwidth*\v!ganttunitlength,\ganttnum-0.2);
+ }
+ \node at (0,\ganttnum) [anchor=base east] {%
+ \getvalue{v!fontsize} #2%
+ };
+ \pgfonlayer{foreground}
+ \draw[diamond-, color=\v!color] (\gantttmpa,\ganttnum+0.1) -- (\gantttmpb,\ganttnum+0.4);
+ \endpgfonlayer
+ \global\ganttlastx=\gantttmpb
+ \doglobal\decrement\ganttnum
+ \egroup
+ }
+
+\def\ganttmilestone
+ {\dosingleempty\doganttmilestone}
+
+% \ganttmilestonecon draws a single diamond *and* connects the diamond with the previous task
+% usage: \ganttmilestonecon[color=<color>]{label}{start}
+% where the optional color argument are the same as for \ganttbar and \ganttmilestone
+\long\def\doganttmilestonecon[#1]#2#3%
+ {\bgroup
+ \getparameters[\??gantt][#1]%
+ \edef\v!color{\@@ganttcolor}
+
+ \nextganttlastx = \dimexpr\ganttlastx+\ganttunitlength*1\relax
+ \ifdim\nextganttlastx>\dimexpr\v!ganttunitlength*#3\relax
+ \draw[-latex,rounded corners=1pt] (\ganttlastx,\ganttnum+1.1+0.2) -- (\ganttlastx+0.4*\v!ganttunitlength,\ganttnum+1.1+0.2) -- (\ganttlastx+0.4*\v!ganttunitlength,\ganttnum+0.6+0.2) -- (\ganttlastx-0.4*\v!ganttunitlength-1.8,\ganttnum+0.6+0.2) -- (\ganttlastx-0.4*\v!ganttunitlength-1.8,\ganttnum+0.1+0.2) -- (#3*\v!ganttunitlength-1.8,\ganttnum+0.1+0.2);
+ \else
+ \draw[-latex,rounded corners=1pt] (\ganttlastx,\ganttnum+1.1+0.2) -- (\ganttlastx+0.4*\v!ganttunitlength,\ganttnum+1.1+0.2) -- (\ganttlastx+0.4*\v!ganttunitlength,\ganttnum+0.1+0.2) -- (#3*\v!ganttunitlength-1.8,\ganttnum+0.1+0.2);
+ \fi
+
+ \ganttmilestone[#1]{#2}{#3}
+ \egroup
+ }
+
+\def\ganttmilestonecon
+ {\dosingleempty\doganttmilestonecon}
+
+\protect \stopmodule