Description Michael Haendel 2010-01-14 06:02:49 EST

Created attachment 156081 [details]
Self running snip to demonstrate problems

Hi,

I just stumbled over two problems with the ScrollBars in Table with style VIRTUAL. Both happen only in specific browsers but are always reproducable.

The first problem is IE specific (7 and 8):
If I change the itemCount of a table which is not displayed at the moment (e.g. in another CTabFolder) the ScrollBar is not updated, allthough scrolling with the mouse wheel still reveals the newly added items.

The second problem is FF specific (3 and 3.5):
If I change itemCount and selection in a table which is not displayed and didn't have a scrollbar before, the showSelection method reveals the item, but the ScrollBar thumb is still in the top position.

I attached a small program which shows the problem. For the IE problem switch to table 1, then enter 0 as table number, a larger item count than currently in that table and press the IE button. For the second problem reduce item count so that no scrollbars are displayed and change to other table. Then enter the unselected table number, item selection and item count (both large enough to urge the table to scroll) and press the FF button.

I did a little testing around the problem and it seems that the problem lies somewhere in JavaScript caching of ScrollBar values. There are some code lines in the snip which solve the problem by executing JS code. Maybe that helps finding a solution.

Cheers,
Michael.