Tcl/Tk 9.1
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| Tcl/Tk 9.1 |
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Latest Release: Tcl/Tk 9.1.0 (Sep 29, 2026) Tcl/Tk 9.1.0 is the current development work on Tcl and Tk, aiming toward stable releases in September 2026. They add new features and interfaces to the foundation of Tcl/Tk 9.0. Download Tcl/Tk 9.1.0 Source Releases Highlights of Tcl 9.1 New command unicode: Unicode normalization New C routines Tcl\_UtfToNormalized\*: Unicode normalization New command timer: monotonic clock; microsecond resolution New command lfilter: select items from list New command interp set: variable access in child interpreter New subst options: \-backslashes, \-commands, \-variables. New switch options: \-integer. Many C99 math routines now available as expr functions. Applications now required to call an initialization routine, either Tcl\_FindExecutable or TclZipfs\_AppHook. New C routine Tcl\_IsEmpty. New C routine Tcl\_GetEncodingNameForUser. New C routine Tcl\_AttemptCreateHashEntry. New C routines Tcl\_ListObjRange, Tcl\_ListObjRepeat, Tcl\_ListObjReverse. New C time API using long long in place of Tcl\_Time Case-insensitive filesystem paths on macOS. auto\_execok and exec search reform on Windows. Revised searches for script library and encodings. Improved list internals for memory efficiency of large lists. Extended support for 64-bit sizes. Highlights of Tk 9.1 Accessibility screen reader support. Initial support for bidirectional text / RTL languages. New widget ttk::toggleswitch. New command tk attribtable. send command revised and improved on Aqua. Handling of negative screen distances. Extended states in ttk::treeview and ttk::notebook Improvements to Tk\_CanvasTextInfo Rotated text on labels Limit message box and dialogs to physical screen width. Improved listbox selection colors. Removed obsolete support for Windows XP appearances. |
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