An update of my interface to wxWidgets is available at

http://homepage.mac.com/rgayvert/wxsqueak.html

1. Works with Squeak 3.7 and wxWidgets 2.5.3 on Win32 and Mac OS X.

2. The API has been expanded and simplified.

    - Wrapper methods are generated for all primitives.
    - All conversions to wxWidget types are handled by primitives, so
      the Smalltalk side is cleaner.
    - The VM has a collection of helper routines that deal with the 
      more
      difficult cases, such as passing/returning arrays or rectangles.
    - wxStyledTextCtrl (based on Scintilla) is supported (but no lexer
      for Smalltalk yet).
    - XRC (wxWidgets XML resource format) is supported.
    - Constants are maintained in a single pool dictionary.
    - Primitives do more type checking, so there should be fewer VM 
      crashes.
    - Generic callback mechanism allows methods in Smalltalk 
      subclasses to
      be called from the wxWidgets framework.

3. Event handling has been improved.

    - All events are handled synchronously, so veto and skip operations
      work properly.
    - Synchronous events can be nested (recursive calls to 
      interpret()).
    - Handlers for synchronous events can be debugged.

4. Rudimentary Model-View-Presenter (MVP) framework

    - Based on notions in Taligent/Dolphin design
    - Combined with XRC,

        - allows wx windows to be saved in the image;
        - allows views to be specified in an external XML form; and
        - provides a basis for a graphical interface builder.

    - Pluggable wx components mimic pluggable morphs (e.g.,
      PluggableTextWidget ~ PluggableTextMorph).
    - wx versions of several standard tools (e.g., Browser, Debugger,
      Inspector) are available.

5. Numerous new demos

    - Styled text, splitters, HTML help, dragging images, tree 
      controls,
      grid, etc.
    - New demo framework parallels the wxPython demo.

6. Full source is available.