Daniel.
I have seen this bug and have worked my way around it. Yes it's
annoying but it's not too hard to work around, so I didn't kick up a
fuss.
1) put each data rows unique ID in a cellTag
2) put a dictionary in your custom class
when the user selects a row, set dictionary.value(uniqueIndexValue) =
true, and then set it to false when it id deselected.
In the listbox's sort event:
for n = 0 to me listcount-1
if dictionary.haskey(me.celltag(n,0)) then
me.selected(n) = dictionary.value(me.celltag(n,0))
else
me.selected(n) = false
end
next
You could probably optimise this further, but I run with up to 5000
rows without much of a noticeable speed hit.
Cheers,
Tom
On 21/01/2007, at 10:10 PM, Daniel L. Taylor wrote:
If you select multiple rows in a ListBox, then sort, the selection
will not be preserved properly.
http://www.realsoftware.com/feedback/viewreport.php?reportid=zgzqygiw
I bring this up on the list only because I consider it a dangerous
bug. If you have data (RAM or DB driven) in a ListBox, and you
allow a user to select and Delete said data, the user could
inadvertently end up in a situation where they delete data they did
not intend to delete.
This does not appear to affect ListBoxes set to single selection.
If I recall correctly, ListBoxes bound to a database can't sort
themselves, so those would be safe to. Ironically, I have and use a
ListBox subclass which populates itself from a DB specifically so
that it is not bound and can sort by header clicks, but I did that
back in the 5.5 days so I don't know if that has changed in 200x.
I saw this tonight while testing an application and hit the
ceiling. It has been around for a while, but I just never saw it or
had a client complain. But it's one bug I do not like.
Daniel L. Taylor
Taylor Design
Computer Consulting & Software Development
[EMAIL PROTECTED]
www.taylor-design.com
_______________________________________________
Unsubscribe or switch delivery mode:
<http://www.realsoftware.com/support/listmanager/>
Search the archives of this list here:
<http://support.realsoftware.com/listarchives/lists.html>
_______________________________________________
Unsubscribe or switch delivery mode:
<http://www.realsoftware.com/support/listmanager/>
Search the archives of this list here:
<http://support.realsoftware.com/listarchives/lists.html>
