Re: NSTableView: tableView:objectValueForTableColumn:row called more than necessary when scrolling
Re: NSTableView: tableView:objectValueForTableColumn:row called more than necessary when scrolling
- Subject: Re: NSTableView: tableView:objectValueForTableColumn:row called more than necessary when scrolling
- From: "Hamish Allan" <email@hidden>
- Date: Thu, 17 Jan 2008 01:06:59 +0000
Hi Ben,
I suspect the designers of NSTableView decided to save themselves
having to cache values for the currently-selected row (which would
later be needed to redraw that row unhighlighted) and in doing so
doomed the rest of us to have to write such code in every single
datasource.
Hamish
On Jan 16, 2008 10:07 PM, Ben Chen <email@hidden> wrote:
> Hi everyone,
>
> I just found that when scrolling a NSTableView inside a NSScrollView
> one row at a time, each time the tableview will not only ask the data
> source for the new row's value but also ask for the last row's. So if
> you scroll the table all the way donw, eventually it makes twice calls
> as the number of rows in the table.
>
> I been programming a app that performance of the table view is vital,
> so I really want the table view call the data source as few as
> possible. Does anyone know a solution?
>
> Thanks,
> Ben
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