Re: Mail-like grouping in NSTableView?
Re: Mail-like grouping in NSTableView?
- Subject: Re: Mail-like grouping in NSTableView?
- From: Mike Abdullah <email@hidden>
- Date: Wed, 13 Feb 2008 16:30:30 +0000
On 13 Feb 2008, at 15:34, Jens Miltner wrote:
Hi,
I'm pondering how to best approach implementing something like Apple
Mail's "Group by Thread" display mode:
I have a database view (which potentially can contain large amounts
of rows), and I would like to group them by some criteria.
Due to the amount of data that _may_ be displayed (not that it
necessarily makes sense), I believe using an NSOutlineView is
probably ruled out due to it's reliance on one object per row (I
don't want to have to allocate 100,000+ objects). In the current
"flat" list that is used, we don't keep objects per row, but rather
fetch the data directly from a database as it's needed.
um, that's exactly how NSOutlineView works (if you use a datasource)
surely? You are required only to provide the count of the objects, and
then individual objects as the outlineView requires them. i.e. You can
load stuff on-demand from your database as desired.
The main obstacle I can think of when trying to implement the
grouping using a plain NSTableView is the ordering, where I'd need
to make sure the group sticks together even when sorted by some
other criteria than the one that specifies the grouping (think of
e.g. sorting e-mails by date in Apple Mail with "Group by Thread"
enabled).
Any ideas how to best approach this?
Thanks,
</jum>
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden