Purpose: describe what a paned window is, and where to find some implementations of one.
A paned window is two windows with a bar down the middle, where the bar has a handle for resizing the two windows.
Tcl/Tk 8.4 has a panedwindow, and a spinbox as well as a labelframe. The panedwindow was the result of TIP 41 [L1 ] which proposed a built-in PanedWindow.
Ro: I always find that I need some examples to get started with a widget. So here is a simple example that should get you started with the panedwindow from Tk 8.4 (be sure to check out the man page [L2 ] for details)
BWidgets [L3 ] has a PanedWindow.
ClassyTk [L4 ] has a Paned widget.
obTcl [L5 ] has a paged window widget.
Jeffrey Hobbs' widget package [L6 ] includes a pure-Tcl geometry-manager-like-thing that serves as a paned window.
Iwidgets [L7 ] (based on itk) includes a panedwindow.
[Does Perl/Tk have a Pane widget?]