a(Virtual)ListBox is a Tcl megawidget that displays a virtual list. [http://perso.wanadoo.fr/maurice.ulis/tcl/Virtuallist/demo1.gif] [http://perso.wanadoo.fr/maurice.ulis/tcl/Virtuallist/demo3.gif] [http://perso.wanadoo.fr/maurice.ulis/tcl/Virtuallist/virtuallists.gif] 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: * [hugecombo] * [hugelist] [ulis] ---- The idea of a virtual listbox was evoked early (1995) by Greg Goodman in c.l.t: http://groups.google.com/groups?hl=fr&lr=&ie=UTF-8&frame=right&th=401f5a4fb1e3a888&seekm=3lcide%24l62%40Starbase.NeoSoft.COM#link1 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.'' ---- [Category GUI] | [Category Widget]