[Tex/LaTex] Change style of basic states in tikz-uml package

Question

I'm currently trying to create a uml activity diagram using the tikz-uml package. However, I would like my uml activities to have a simple body instead of the "rectangle split"-like body they have now.

Desired style of activities:

Current style:

MWE:

\documentclass{article}
\usepackage{tikz}
\usepackage{tikz-uml}

\begin{document}

\begin{tikzpicture}
    \umlbasicstate [y=-10, rectangle] {I am a state}
\end{tikzpicture}

\end{document}

I've tried changing line 2988 of tikz-uml.sty from

\tikzstyle{tikzuml state style}=[rectangle split, rectangle split parts=2, rounded corners, inner xsep=1.5ex]

to

\tikzstyle{tikzuml state style}=[rectangle, rounded corners, inner xsep=1.5ex]

but it doesn't seem to change anything.

Answer 1

You can mix tikz-uml nodes with regular, customizable tikz nodes. In the example below a style is defined for a simple state, to connect to the uml nodes.

Code:

\documentclass{article}
\usepackage{tikz-uml}
\tikzset{singlestate/.style={draw,fill=yellow!20, rounded corners}}

\begin{document}
\begin{tikzpicture}
\umlstateinitial[name=initial]
\node[singlestate] at (5,0) (create){Create ticket};
\umlstatedecision[y=-3,x=5,name=decision]
\node[singlestate] at (1,-3)(reproduce){Reproduce issue};
\node[singlestate] at (10,-3)(update){Update ticket};
\umltrans{initial}{create}
\umltrans{create}{decision}
\umltrans{update}{decision}
\umltrans{decision}{reproduce}
\end{tikzpicture}
\end{document}

Result: