JAVA Swing | JGraphX: a diagram editor

I would like to get a "prototype" application written in java which allows to create/modify diagrams (see picture in uploaded file). In fact, it's just a costumization of the library JGraphX ([login to view URL]). This library proposes a good documentation and some examples. => Docs: [login to view URL] The examples "[login to view URL]" or "[login to view URL]" are good starting points, I think... => Examples: [login to view URL] I need to be able to: - add cell by drag-and-drop from a toolbar - delete/modify cells - group cells into an encapsulation block. And to collapse/expand those blocks. Don't panic, it's already supported by JGraphX ;) => see 2.2.5.1 Folding in the documentation : [login to view URL] - put components inside the cell (checkboxes or listboxes). So, more than just a text... OPTIONS/BONUS: An "autoarange" function will permit to format the diagram automatically.