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I am trying to use the pgfgantt package to create a deployment event timeline for a cubesat. The various stages of deployment that the cubesat undergoes are on the order of seconds, minutes, and hours not days, months and years. Is there a good way to format the gantt chart title list so that it will display in a hours:minutes:seconds format?

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Hi Tim, welcome to the site! Could you provide a mockup of what you'd like the chart header to look like? Do you actually need to put the seconds into the title list? If your chart will cover a period of several hours, you most likely won't be able to see differences in the order of seconds (unless you make the chart very wide). – Jake Dec 3 '12 at 23:04

If one wants to left-/top-align the titles (the times) one need to hack (re-define) the \gantttitle macro as it uses

  • a rectangle path operator and
  • this \draw element is not in a scope accessible by a style (say for on background layer).

The rest is math and styles.

Code (Explanations in comments.)

    vgrid 0/.style={draw,gray!25},
    vgrid 1/.style={draw,gray},
    vgrid 2/.style={draw,thin},
    vgrid 3/.style={draw,thick}
        \foreach \@Minute in {1,...,#5}{%
                \xdef#1{#1,vgrid 3/.try}%
                    \xdef#1{#1,vgrid 2/.try}%
                        \xdef#1{#1,vgrid 1/.try}%
                        \xdef#1{#1,vgrid 0/.try}%
        % My settings:
        vgrid/.expand once=\myVgrid,
        x unit=.08cm,
        y unit title=1.3cm,
        link bulge=2,            % needs to be higher because one unit became too small
        group peaks ={0}{2}{.1}, % here too, but I opted for a left aligned (= 0) tip (the third paramter seems to not having any effect)
        % Example Settings
        y unit chart=0.5cm,
        include title in canvas=false,
        bar/.style={draw=none, fill=OliveGreen!75},
        bar height=.6,
        bar label font=\normalsize\color{black!50},
        group right shift=0,
        group top shift=.6,
        group height=.3,
        group peaks={}{}{.2},
        % 120 minuts(or seconds):
        \foreach \Minutes[evaluate=\Minutes as \printMe using {int(mod(\Minutes,5))},
                          evaluate=\Minutes as \Hour using {int(\Minutes/60)},
                          evaluate=\Minutes as \Minute using {int(\Minutes-60*\Hour)}] in {0,1,...,120}{
          \ifnum\printMe=0 %if the minute is divisible by 5
            \ifnum\Minutes>0 % but not zero
                        title label anchor/.append style={
                                rotate=90,        % we want them to not occupy much room
                                anchor=south,     % and to be aligned to the right (to their right line)
                                fill=white,       % overdraw the other fake titles
                                inner xsep=1.5pt, % but leave a little tick
                                inner ysep=0pt,   % don't leave room between time and right line
                                text height=.35cm % really overdraw the other lines (must lie between 4*<x unit> and 5*<x unit>)
        } \\
        % Again: Example gantt data with changed numbers
        [progress=100, progress label font=\small\color{OliveGreen!75},
        progress label anchor/.style={right=4pt},
        bar label font=\normalsize\color{OliveGreen},
        {Preliminary Project}{1}{30} \\
        \ganttset{progress label text={}, link/.style={black, -to}}
        \ganttgroup{Objective 1}{31}{120} \\
        \ganttbar[progress=4, name=T1A]{Task A}{31}{75} \\
        \ganttlinkedbar[progress=0]{Task B}{76}{120} \\
        \ganttgroup{Objective 2}{31}{120} \\
        \ganttbar[progress=15, name=T2A]{Task A}{31}{90} \\
        \ganttlinkedbar[progress=0]{Task B}{91}{120} \\
        \ganttgroup{Objective 3}{51}{80} \\
        \ganttbar[progress=0]{Task A}{51}{80}
        \ganttlink[link mid=.4]{pp}{T1A}
        \ganttlink[link mid=.159]{pp}{T2A}


enter image description here

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As pgfgantt understands only integer timeslots and doesn’t handle decimal input (the given parameters of \ganttbar are saved in a count register) one need a column for the smallest time element. Although, one could implement a time slot format that transforms a input like 1:15 in the correct timeslot integer (here 75/76). A few more keys and one doesn’t need to start at 0:00. – Qrrbrbirlbel Jul 29 '13 at 15:41

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