Model-View Architecture

[jtooker]

To make the other changes required by this app, additional separation of functionality is desired.

Namely, batchFileRenamer.js must be split up into a model and a view.

The model will know about the file system and settings but NOT about the view directly. It will receive a callback to evoke when its observable state changes.

The view (also a bit of controller) will redraw when the model changes and give the model updates on user actions. The view will require the model to be constructed.

I'll use Douglas Crockford's object convention.

[jtooker]

Other Changes

While the goal was to simply rework, not enhance with this commit, some changes were made:

• Preview is automatically updated when options change
  • Includes checkboxes when the extension filter changes
  • User check/uncheck of checkboxes is still ignored
• Preview is automatically shown and preview /button removed
• Rename button is always shown
• Error reporting is a bit goofy still (but not quite the way it was)