Create PZPanel/PZComponent as major UI object

[grg]

I propose replacing PZWindow with PZPanel/PZComponent as the main UI element of ENVI.

PZPanel (or PZComponent) would be a JPanel/JComponent subclass that can be added anywhere that a normal Swing component could be used. This means that a PZPanel could be dropped into any GUI to add an ENVI element.

One compelling example that I can envisage is a "view within a view". What I imagine here is a large ENVI view (occupying most/all of a window) that is zoomed in with a smaller ENVI view in one corner that is zoomed out, allowing the user to easily see where they are in the topology. (Think Google Streetview showing the little map in the corner.)

An issue to note while doing this is how to handle key event listeners.

[dound]

It would be more useful to split out a lot of PZWindow's functionality into a new PZPanel component. That would definitely make it easier to embed ENVI content in any applications (even within itself, as you pointed out). This might leave PZWindow as just as wrapper which makes PZPanel its own window ... something to think abouts. Thanks.