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%D \module
%D [ file=t-gantt-tikz,
%D version=2011.09.11,
%D title=\CONTEXT\ User Module,
%D subtitle=Drawing Gantt charts,
%D author=Adam Reviczky,
%D date=\currentdate,
%D copyright=Adam Reviczky,
%D license=Public Domain]
%D Some macros for drawing Gantt charts using TikZ.
\writestatus{loading}{ConTeXt User Module / tikz gantt chart}
\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
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