| Tcl/Tk 8.4.20 (Jun 1, 2013) Download Tcl/Tk 8.4.20 Source Releases New Tcl/Tk 8.4 Features The 8.4 release was a long time in development, and brought about many great enhancements to Tcl/Tk. - 64-bit file system support (where the OS supports it)
- 64-bit expr support at the Tcl level (even on 32-bit OSes)
- serial port support (Windows / Unix)
- numerous performance enhancements
- support for starkits (aka scripted documents)
- improved escape-based encoding support (i.e. iso2022-jp)
- improved threading support
- new virtual file system
- new lset command
- command enhancements (regsub, trace, lindex, lsearch)
- new eq and ne operators for
expr - updated tcltest, http and msgcat packages
- widget enhancements
- new spinbox, panedwindow and labelframe widgets
- compound buttons / labels / menu items
- undo/redo support in the text widget
- native Aqua support for OS X
- improved image transparency support
- platform specific wm attributes command
- extended documentation
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