Re: NSTextfield in tableColumn changing color slow

• Subject: Re: NSTextfield in tableColumn changing color slow
• From: Corbin Dunn <email@hidden>
• Date: Thu, 16 Oct 2008 06:59:07 -0700
• Delivered-to: email@hidden
• Delivered-to: email@hidden

Hi Steven,

On Oct 16, 2008, at 2:03 AM, Steven Hamilton wrote:

Hi Folks,
I have a core data bound tableColumn that displays a currency balance. My NSManagedObject is a custom class that calculates the balance from a @sum of related transactions and returns the balance. The binding then displays this balance in the tableColumn. So far so good. This works fast.

I've implemented the delegate method below to query the NSTextfield value and change the color to red if it's less than 0. However, when I implement this and scroll the table its slow and jerky. Clearly I'm going about this the wrong way. How is it best to change the color based on the value of the cell?

- (void)tableView:(NSTableView *)tableView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row;

This is a good way to do it. Do you have a sample to show the slow down?

And/or what does your code do in this method?

-corbin
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