Advice? Displaying multiple text streams

Question

I've got a file format that contains up to 2 essentially independent styled text streams. I would like to display each stream in a visually independent text view (i.e. if 2 text streams, then 2 panes with scroll bars) and allow changes to be saved back to this single file in the same format.
I'm wondering what the best way to accomplish this is with the Swing text system? I've studied the Swing text documentation and I have two radically different ideas on how to go about this, but I was wondering if anyone else has better ideas than I.
Anyone?

Answer 1

Can you share your two ideas ?Sure.
First, Swing text using JTextPane uses a model/view/controller paradigm. The controller, EditorKit, seems to be responsible both for initializing the model (Document) from the persistent storage (a file), and indirectly for setting up view objects in the JTextPane. One idea was to subclass EditorKit with something that knows how to read my file type. I may also need a custom StyledDocument subclass that knows about the 2 parts. I may also need a custom ViewFactory and some custom Views. This approach boils down to: I need to learn the Swing text system a whole lot better before even trying.
The other approach is to say, ok, EditorKit will not do the reading and writing of the file. Instead I'll invent a class that can do that. This class would read each section into its own StyledDocument. Then I would have 2 JTextPane's, and attach these new initialized StyledDocuments to the respective JTextPanes. Alternatively, I could get the existing StyledDocument from the JTextPanes and my as-yet-non-existent class could read the sections into those StyledDocuments. This bypasses the i/o part of the EditorKit and lets it do whatever else it does--hopefully having the Document initialized by something other than the EditorKit itself would not be a problem.
Those are the two approaches I had so far thought of.