I need a graphical java application that allows elements to be added, dragged, dropped and maximized to a canvas/panel.



These elements can then be linked together, the links are shown graphically.  My immediate thought was to use jDesktop and jInternalFrames but I am open to any solution.



The elements consist of ‘nodes’, ‘transpositions’, ‘instruments and ‘links’.



The nodes are the most complex and should have a canvas/panel inside of them on which circles or rectangles can be added. 



These circles and rectangles can then be dragged, dropped and resized. Copy and pasting of the circles and rectangles should be allowed within and between the nodes. When a node is resized the circles and rectangles within the node should be resized in the same proportion as the node itself.



Please see the attachment for further details