工作流图形设计器参考资料

使用html5画图：

https://gridwizard.wordpress.com/2015/03/25/simple-c-library-to-render-graph-to-flowchart/

https://github.com/gridwizard/SimpleFlowDiagram

wpf画图：

http://www.codeproject.com/Articles/23871/WPF-Diagram-Designer-Part

winform类似visio:

https://github.com/dalssoft/diagramnet

https://github.com/search?utf8=%E2%9C%93&q=nshape

http://mindfusion.eu/demos/flowchartnet/start.htm

https://github.com/Microsoft/automatic-graph-layout