The combination of using notifications and invalidating the view works
just as I desired.

Thankyou for you help.

-Mic

2009/2/26 Corbin Dunn <corb...@apple.com>:
>
> On Feb 26, 2009, at 1:09 AM, Mic Pringle wrote:
>
>> 2009/2/25 Corbin Dunn <corb...@apple.com>:
>>>
>>> On Feb 25, 2009, at 2:58 PM, Mic Pringle wrote:
>>>
>>>> Hi,
>>>>
>>>> I've a subclass of NSTableView that draws a custom gradient
>>>> background. What I'd like to do now is to draw a slightly different
>>>> background when the window containing the custom NSTableView loses
>>>> focus.
>>>>
>>>> Is this possible ?
>>>>
>>>> If so, could someone please point me in the right direction ?
>>>>
>>>> I know that in the NSTableView subclass you can use [self window] to
>>>> get the containing window, so I have tried things like [[self window]
>>>> isKeyWindow] and [[self window] isMainWindow] but this doesn't seem to
>>>> get me anywhere.
>>>
>>> In addition to what Nick said, you probably aren't invalidating the
>>> tableview when the window looses/gains key status.
>>>
>>> What you want to do does work, and is possible; the
>>> NSTableViewSourceListHighlightStyle does this automatically.
>>>
>>> corbin
>>>
>>>
>>>
>>
>> Hi Corbin,
>>
>> I understand what Nick suggested and will look into it, but don't
>> quite understand what you mean by invalidating the tableview. Could
>> you give me a little more information ?
>
> You will want to call [tableView setNeedsDisplay:YES] to get it to redraw
> its custom background. You'll want to do this inside the notifications for
> the window gaining/loosing key. That is all I meant.
>
> corbin
>
>
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