What's in sml_tk 3.0?

• SmlTk has now an opaque interface; in previous versions, internal aspects of the implementation (widget identifiers had been implemented as strings) had been exported.
• The constructors for widgets, canvas items and windows have been changed from plain cartesian products to labelled records, e.g. instead of

     CRectangle (cid, c1, c2, cl, bl) 
  

  we now have

     CRectangle{citemId=cid, coord1=c1,
                coord2=c2, configs=cl, bindings=bl}
  

• Extended support of basic Tk functionality, such as the grid packer and various configuration options, such as colours, underlines, &c.
• There are many new components in the toolkit library such as treelists, tables, tabs and TGenGUI.
• There is a common infrastructure - a system of signatures that allow a uniform exchange of objects (visualizable elements).
• sml_tk is now fully conformant with the SML'97 standard, and hence runs under SML of New Jersey, PolyML and MoscowML.
• There is an additional configuration (based on the packet njml_patch) that embeds a Tcl-interpreter inside the ML runtime system; thus, the communication overhead caused by pipes can be eliminated.
• There is a new interupt mechanism, allowing to interrupt applications without destroying the gui.