'From Squeak2.8alpha of 6 February 2000 [latest update: #1819] on 23 
February 2000 at 1:08:01 am'!
"Change Set:		PluggableFileList2
Date:			23 February 2000
Author:			Andrew C. Greenberg

This is a revised version of the PluggableFileLIst2, and incorporates 
PluggableFileLIst as originally posted to the listserv, with 
modifications and fixes.  For best results, this should be used 
together with PluggableButtonView changeset posted contemporaneously 
with this changeset.  The changesets may be loaded in any order.  The 
revision is slightly refactored, and displays the modal window with a 
more distinctive border.

1) Implements a more graphically attractive 'standard file dialog' 
service similar to those found in Windows, MacOS and many Unix GUIs. 
It is basically a highly pluggable modal FileList with buttons -- See 
the class comment for more detail.

Sample doIts:

	x _ PluggableFileList getFile
	y _ PluggableFileList putFile
	z _ PluggableFileList getFolder

2) PluggableFileList is installed as the MVC operation for the 
'file...' menu selection as well.  In time I hope to build a 
Morphic-side dialog, so to replace the present menu-based interface 
used there.

3) This changeset introduces a ModalSystemWindowView for building 
Modal dialogs in MVC.

4) The changeset also fixes a typo in ScreenController, in which an 
earlier change set had inadvertently elided the words 'dual change 
sorter' to 'chang'"!
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