Flowtex

Flowtex allows to easily create flowcharts with tikz for LaTeX.

Installation

npm install -g flowtex

You have to install tex/flowtex.sty in your LaTeX working directory to use it.

wget https://raw.githubusercontent.com/pierre-luc/flowtex/master/tex/flowtex.sty

Flowtex use LaTeX packages: tikz and xcolor. The extension flowtex import tikz and xcolor.

Render based on

The extension flowtex.sty is based on the following external definitions: https://www.sharelatex.com/blog/2013/08/29/tikz-series-pt3.html

API

• Template:
  • Nodes:
    • N: Start or stop node
    • D: Conditionnal node
    • IO: Input or output node
    • P: Process node
• LaTeX Formatter:
  • Arrows:
    • <- : $\leftarrow$
    • -> : $\rightarrow$
  • Text
    • Bold
      • **text** : \textbf{text}
• Methods:

  • Size:

    • _node_.width(_Number_)

  • Placements:

    • _originNode_.above(_node_): node is above of originNode
    • _originNode_.below(_node_): node is below of originNode
    • _originNode_.left(_node_): node is left of originNode
    • _originNode_.right(_node_): node is right of originNode

  • Arrows:

    • _originNode_.goto(_targetNode_)
      • Arrow style as next goto declaration: _gotoCall_(_targetNode_).brokenArrow(): |- tikz style _gotoCall_(_targetNode_).offsetArrow(x, y): offsets of start point from origin node

  • Placements with Arrows:

    • _originNode_.aboveGoto(_node_)
    • _originNode_.belowGoto(_node_)
    • _originNode_.leftGoto(_node_)
    • _originNode_.rightGoto(_node_)

  • Labels:

    • leftLabel(_string_)
    • rightLabel(_string_)
    • topLabel(_string_)
    • downLabel(_string_)

How to

tutorial

Example

Input Easy Flowtex code

Nodes declarations first and arrows declarations in second time.

flowchart.offsetX("3");
flowchart.unit("cm"); // default

a = N("Node A").below(
  b = P("Node B")
    .leftGoto(c = P("Node C")).downLabel('Label A')
    .rightGoto(d = P("Node D")).downLabel('Label C')
);

a.goto(c).leftLabel('Label C');
a.goto(d).rightLabel('Label D');
b.goto(a).rightLabel('Label C');

Input Rich Flowtex code

Nodes declarations and arrows declarations in same time.

flowchart.offsetX("3");
flowchart.unit("cm"); // default

N("Node A")
    .origin("a")
    .target("b").rightLabel("Label C")
.below(
    P("Node B").origin("b").origin("c")
    .left(
        P("Node C")
            .target("a").leftLabel("Label B")
            .target("c").downLabel("label A")
    )
    .right(
        P("Node D")
            .target("a").rightLabel("Label D")
            .target("c").downLabel("label C")
    )
);

Generate latex code

flowtex sample.js

Output Tikz code for LaTeX:

\begin{center}
    \begin{tikzpicture}[node distance=2cm]
        \node (node0) [startstop] {Node A};
        \node (node1) [process, below of=node0] {Node B};
        \node (node2) [process, left of=node1, xshift=-3cm] {Node C};
        \node (node3) [process, right of=node1, xshift=3cm] {Node D};
        \draw [arrow] (node0) --node[anchor=east] {Label B} (node2);
        \draw [arrow] (node0) --node[anchor=west] {Label D} (node3);
        \draw [arrow] (node1) --node[anchor=west] {Label C} (node0);
        \draw [arrow] (node1) --node[anchor=north] {label A} (node2);
        \draw [arrow] (node1) --node[anchor=north] {label C} (node3);
    \end{tikzpicture}
\end{center}