Version 15 of Virtuallist
Updated 2004-01-04 17:25:41a(Virtual)ListBox is a Tcl megawidget that displays a virtual list.
The items are virtual and are obtained through a procedure callback when they should be displayed.
- the list is not fixed and can vary on demand,
- there can be more virtual items than memory can contain (until 2^30 - 1 items),
- the items can be memorized to optimize the display,
- the items can be invalidated to free the memory,
- a note can be associated with each item.
doc & dowload: http://perso.wanadoo.fr/maurice.ulis/tcl/Virtuallist
See also:
The idea of a virtual listbox was evoked early (1995) by Greg Goodman in c.l.t:
I never read the thread before but his description is very close to my design.
28 Sep, 2003 - How is it different from a (Tktable) table?
ulis: It's not a multi-columns megawidget but a widget with virtual data (given by a callback).
At the top of the page you can see:
- the demo with computed items
- the demo with items from the Web
- the demo with items from a DB (3 associated virtuallists)
- Sorry, it still is not very clear.