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The source code for Tk is managed by fossil. Tk developers coordinate all changes to the Tk source code at

Tk Source Code

Release Tk 9.0b3 arises from the check-in with tag core-9-0-b3.

Highlighted differences between Tk 9.0 and Tk 8.6 are summarized below, with focus on changes important to programmers using the Tk library and writing Tcl scripts containing Tk commands.

Many improvements to use of platform features and conventions.

  • Built-in widgets and themes are scaling-aware.
  • Improved support of two-finger gestures, where available
  • The tk windowingsystem "aqua" needs macOS 10.10 or later

New commands and options

  • tk sysnotify: access to the OS notifications system
  • tk systray: access to the OS tray facility
  • tk print: access to the OS printing facility

Widget options

  • New ttk::progressbar option: -text
  • $frame ... -backgroundimage $img -tile $bool
  • $menu id, $menu add|insert ... ?$id? ...
  • $image get ... -withalpha ...
  • All indices now accept the forms end, end-int, int+|-int

Improved widget appearance

  • ttk::notebook with nondefault tab positions

Images

  • Partial SVG support
  • Read/write access to photo image metadata