CL-GTK2 is a Common Lisp GUI library that provides access to the Gtk+ cross-platform GUI library in idiomatic Lisp style.

CL-GTK2 should portably work in most modern Lisps that support CFFI and MOP (see Compatibility).

Messages regarding development, feature requests, bug reports should be posted to cl-gtk2-devel mailing list.

clgtk2 blog contains news on development of CL-GTK2.

Features:

• Provides Gtk+ API in a Lispy way
• Binds large part of Gtk+ API
• Objects and classes are mapped into CLOS objects and classes
• Gtk+ objects are garbage collected
• Error in objects' signal handlers are restartable
• Provides some higher-level abstractions over Gtk+ facilities:
  • Calling code in GUI thread (call-within-main-loop, call-within-main-loop-and-wait)
  • Displaying progress-bar for long-running code (with-progress-bar)
  • Displaying errors (with-gtk-message-error-handler)

CL-GTK2 is not yet complete. To do:

• Better implementation of type mapping Done
• Change weak references to toggle references Done
• Better support for subclassing objects and defining GObject classes implemented in lisp
• Complete API binding
• Support for wide range of Lisp compilers and interpreters
• Support for Gtk+ on Microsoft Windows and Mac OS X
• Write documentation and tutorial
• High-level API for user interface building
• An introductory screencast

Changes:

• 2009.12.30. Version 0.1.1 released.
• 2009.10.24. Version 0.1 released.
• 2009.10.04. Added support for another Lisp compiler: Clozure CL and for another OS: Microsoft Windows.
• 2009.09.07. Rewrote memory management code.
• 2009.08.08. Rewrote GBoxed type mapping.
• 2009.07.18. Added GObject documentation to the site.