tutorials for visual stuff:

http://www.google.com/#hl=en&sclient=psy-ab&q=site:leepoint.net+java+jpanel+draggable+shapes&pbx=1&oq=site:leepoint.net+java+jpanel+draggable+shapes&aq=f&aqi=&aql=&gs_sm=3&gs_upl=44557l48333l11l48624l9l9l0l0l0l5l282l1627l0.4.4l8l0&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=d272a33775ff33c4&biw=1366&bih=609
http://leepoint.net/notes-java/GUI-lowlevel/graphics/10graphics.html
http://www.leepoint.net/notes-java/examples/mouse/paintdemo.html
http://www.leepoint.net/notes-java/GUI-lowlevel/graphics/40drawingpanel/10drawingpanel.html
http://www.leepoint.net/notes-java/examples/mouse/10mousetest.html
http://www.velocityreviews.com/forums/t137173-why-does-this-work-for-canvas-but-not-for-jpanel.html
http://www.java2s.com/Code/Java/Event/MoveShapewithmouse.htm

Made some real progress today:

Comment I left on my recent commit:

Created a PVisualization class:
- groups events and windows together
- window/events groups are draggable
- the edges between nodes keep up with the dragging
- zoomable, drag in directsion with the right click
- panable, drag on anything that isn't a window to pan
- small text labels follow fixed position (windows only)
- nodes colored correctly
- may want to look into making the event class into a wrapper of the PNode class
- in same regard, may want a PNode wrapper class for windows also
- haven't figured out how to paint the edges different colors

As the file stands now, it may be a little rudimentary, but it should work fine with any input given the properly named and placed files and window screenshots.

I have committed all the efg, gui files and screenshots uploaded by Brown. I tried the visualization for ContactManager, which didn't look so good. Try running it for ContactManager when you have time.

Just added the capability to click on node/nodes to select/deselect them.
Plan on working on the capability to drag nodes tomorrow, shouldnt take too long