Hi,

I need to develop a program that can draw schedules graphically,
allowing the user to manipulate time intervals at will by allowing them
to drag bars around in a timeline and change their lengths. This data
will eventually update a database. Having developed a 3D Graphics
intensive application in the past whose design degenerated into a hack
job because it was never done properly, I wanted to do this one right
(particularly since I'm being paid for this one!). Here are my
questions:

* As the graphics are merely 2D, would it be easier just to use the
Graphics2D class to implement the graphical schedule as opposed to
using JOGL, whislt allowing user interaction? Does Graphics2D have a
concept of a Canvas? I come from a JOGL background and have worked on a
very similar program using JOGL and I have the source code, but it
doesn't seem particularly install-friendly for the client as it doesn't
come with the standard distro.

* As far as program design goes, I'm a bit lost. How does one design a
wonderful GUI, then link it up to actual functionality? As you might
see, there could be potentially heaps of events that would need to be
handled in this program. My old 3D program stored the entry point into
the "real" functionalities by storing a reference to that particular
class in the GUI class. That class then delegated the requested
commands to a heap of other different classes. It all became very, very
messy as the program grew. The ActionListeners were everywhere. I've
had a look at some design patterns, but they're pretty vague sometimes.

I'd appreciate any ideas, thanks!!
Jenny