Gantt is a (third party) ConTeXt module for drawing Gantt charts via MetaPost or PGF/TikZ.

== Description ==
To switch between the two drawing engines (MetaPost and TikZ) use the style option.
\usemodule[gantt][alternative=mp]
\usemodule[gantt][alternative=tikz]
The default engine is MetaPost.

Here is a short description of the environments and commands:

=== Gantt ===
The gantt environment draws the canvas of a gantt figure.
\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:
* factor - MetaPost scale factor (default: 1)
* xunitlength - length of one time slot (default: 1cm)
* style - fontsize of labels (default: \tf)
* titlestyle - fontsize of title section (default: \tfx)
* drawledgerline - switch to enable/disable the drawing of horizontal ledger lines (default value: false)

=== Ganttitle ===
This is the environment for drawing the title section.
\startganttitle (…) \stopganttitle

=== Titleelement ===
This draws one element of the title.
\titleelement{label}{length}

=== Numtitle ===
This draws a numbered sequence of title elements.
\numtitle{start number}{increment}{end number}{length of each title element}

=== Ganttbar ===
This draws a single, unconnected bar for representing a task.
\ganttbar[pattern=value,color=value]{label}{start}{length}
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 color of the pattern (e.g. black (default), red, green blue gray, dark gray)

=== Ganttcon ===
This draws an arrow between the bars specified by coordinates.
\ganttcon{startx}{starty}{endx}{endy}

=== Ganttbarcon ===
This draws a single bar and connects the bar with the previous bar for consecutive tasks.
\ganttbarcon[pattern=value,color=value]{label}{start}{length}
The optional pattern argument are the same as for \ganttbar.

=== Ganttgroup ===
This draws a bar to group tasks.
\ganttgroup{label}{start}{length}

=== Ganttmilestone ===
This draws a milestone using a diamond.
\ganttmilestone[color=value]{label}{start}
The optional color argument argument is:
* <color> - a color of the pattern (e.g. black (default), red, green blue gray, dark gray)

=== Ganttmilestonecon ===
This draws a milestone using a diamond and connects the milestone with the previous bar or milestone.
\ganttmilestonecon[color=value]{label}{start}
The optional color argument argument is:
* <color> - a color of the pattern (e.g. black (default), red, green blue gray, dark gray)
