.

original commit: 25ba6ad75b4f39488ba06e0f08f867bf68d91de2

collects/tests/mred/item.ss

@@ -1357,9 +1357,9 @@
 	   [small? (send ck-s get-value)]
 	   [swap? (send ck-w get-value)])
       (send c1 set-vsize 10 10)
-      (send c1 set-scrollbars (if h? 1 0) (if v? 1 0) 10 10 3 3 1 1 swap?)
+      (send c1 set-scrollbars (and h? 1) (and v? 1) 10 10 3 3 1 1 swap?)
       (send c2 set-vsize (if small? 50 500) (if small? 20 200))
-      (send c2 set-scrollbars (if h? 25 0) (if v? 10 0) (if small? 2 20) (if small? 2 20) 
+      (send c2 set-scrollbars (and h? 25) (and v? 10) (if small? 2 20) (if small? 2 20) 
 	    3 3 1 1 (not swap?))
       (if for-small?
 	  ; Specifically refresh the bottom canvas

notes/mred/MrEd_100.txt

@@ -4,47 +4,68 @@
                         ******************
 
 MrEd 100 is the successor to MrEd 53. For MrEd 100, we redesigned the
-GUI toolbox interface to streamline it, to make it more Scheme-like,
-and to make it more accessible to new users. While we preserved the
-windowing model that underlies the old toolbox, every MrEd 53 program
-requires substantial changes to run in MrEd 100.
+GUI toolbox interface to make it simpler and more Scheme-like.
+Although we preserved the windowing model that underlies the old
+toolbox, every MrEd 53 program will require substantial changes to run
+in MrEd 100.
+
+The new interface makes MrEd more accessible to new users: class and
+method names are more consistent; useless and redundant methods have
+been eliminated; and method arguments are more thoroughly checked. Key
+portions of the documentation have been re-written.
+
+The implementation behind the new interface is reliable. Previous
+versions of MrEd were plagued by bugs and inconsistently implemented
+features, whereas the new interface is consistently implemented across
+platforms and thoroughly tested. Of course, bugs will always slip
+through, but as a result of new testing methods, we expect MrEd 100 to
+be far more robust than previous versions.
+
+New Application Architecture
+----------------------------
 
 MrEd 53 comprised two parts:
 
- * a low-level toolbox (containing names prefixed with `wx:') that was
-   too primitive for real programming (no geometry management); and
+ * a core toolbox (containing names prefixed with `wx:') that was too
+   primitive for real programming (no geometry management); and
 
  * an application framework (containing names prefixed with `mred:')
-   that provided useful window classes (with geometry management) but
-   also much more, making it too heavyweight for simple GUI programs.
+   that provided crucial functionality (e.g., windows with geometry
+   management) but also much more, making it too heavyweight for
+   simple GUI programs.
 
-For MrEd 100, we split the core toolbox and the application
-framework. The new toolbox includes the most useful stuff from the old
-`mred:' domain, such as the windowing classes with geometry
-management.  Those `mred:' classes replace clumsy `wx:'
-classes. Useless and redundant methods have been eliminated. As a
-result, the MrEd 100 toolbox is both smaller and better than the core
-toolbox in MrEd 53.
+For MrEd 100, we moved the boundary between the core toolbox and the
+application framework. "MrEd" now refers to only the core toolbox, but
+the new core toolbox includes the most useful `mred:' classes from the
+old application framework. We eliminated the `wx:' and `mred:'
+prefixes; many of the former `mred:' classes replace the former `wx:'
+classes. 
 
-The old `mred:' classes that implement the application framework have
-been moved into a separate, optional library. It is no longer
-necessary to understand units and collections to implement a simple
-MrEd application.
+All of the core toolbox classes are built into the MrEd executable.
+The remaining `mred:' classes were moved into a separate, optional
+framework library, which was itself thoroughly revised. Changes to the
+framework classes are described in a separate document.
+
+Running MrEd and Developing MrEd Applications
+---------------------------------------------
 
 Unlike MrEd 53, MrEd 100 is merely an extension of MzScheme with a GUI
-toolbox. No extra files are needed to start the MrEd
-executable. Command-line handling for MrEd 100 is the same as for
+toolbox. Command-line handling for MrEd 100 is the same as for
 MzScheme; the only difference is that MrEd executes
 `(graphical-read-eval-print-loop)' on startup instead of
-`(read-eval-print-loop)'.
+`(read-eval-print-loop)'. It is no longer necessary to understand
+units and collections to implement a simple MrEd application.
 
 MrEd's `graphical-read-eval-print-loop' implements a rather primitive
-REPL, as opposed to the relatively useful REPL that came with the old
+REPL, as opposed to the relatively useful REPL provided by the old
 MrEd toolbox-framework combination.  DrScheme 100 replaces the old
 MrEd REPL. Unlike previous releases of DrScheme and MrEd, DrScheme 100
 provides a REPL that matches MrEd's language exactly.
 
-The remainder of this document provides an overview of MrEd 100 and
+Porting to MrEd 100
+-------------------
+
+The remainder of this document provides an overview of MrEd 100 with
 notes that are useful for upgrading MrEd 53 applications. Section 0
 describes a few highlights of the MrEd 100 revision. Section 1 shows
 the new interface/class hierarchy for windows and a few other parts of
@@ -1047,7 +1068,7 @@ the-color-database only has a find-color method; the others were
  TODO: Miscellaneous Cleanup
 -----------------------------
 
-Pick a set of key-bindings for text-field% items.
+Install a set of key-bindings for text-field% items.
 
 Implement keyboard-based movement in frames/dialogs (in Scheme using
 on-pre-char).