http://www.draw2d.org/draw2d/node/100
http://www.draw2d.org/draw2d/node/110
http://www.draw2d.org/draw2d/files/demo/vectordraw/index.html
http://www.draw2d.org/draw2d/files/demo/owndraw/index.html
http://www.draw2d.org/draw2d/files/demo/scroll_to/index.html
http://www.draw2d.org/draw2d/files/demo/simple/index.html
http://www.sencha.com/forum/showthread.php?50803-graphics-in-Ext-Draw-line/page2