Description Mike Wilson 2001-10-11 14:22:11 EDT

We have fairly stable code that handles Tree auto-scrolling and item expansion during
	Drag & Drop.  I think we should offer this behaviour as a feature that can be selected
	by a Style bit.  e.g. SWT.DROP_ENSURE_VISIBILITY (ideas for good names anyone??).

	Same thing with Table or other widgets that don't have native support for auto-scroll.

	Clearly we can't just drop the code in place, but it would be a good start.
	[I'm thinking of TreeDropFeedbackListener in the org.eclipse.swt.examples.fileviewer
	package.  It has some unresolved issues on Linux -- incidentally the same ones
	as the Eclipse Navigator does.]

	Currently there is some duplication in the users of our Tree class, and therefore a
	potential for bugs in the implementation, cross-platform hiccups, and UI look-and-feel
	style inconsistencies.

NOTES:

	McQ (26/06/2001 9:02:23 AM) -
		It would be good to put this in, since we didn't manage to do it for KH like
		we said we would last release.

	JB (27/08/2001 6:34:40 PM)
		Can't do this before leaving SWT team.
		There is code to implement the feedback using only public API in the
		FileViewer example but this really wants to be implemented as a
		an extension to our DND feedback mechanism.  Have talked to VI
		about this.