Thanks for reply.
On Jun 21, 2012, at 11:05 AM, Lee Ann Rucker wrote:
> isItemExpandable and isGroupItem have nothing to do with NSCells. They're
> called for the items.
>
> Cell-based table and outlineView reuse the cells for each row; this was a
> memory-saving technique 20 years ago, not so useful today. So before they
> drew a particular cell it had to be configured for the item; that's what the
> willDisplayCell methods are for.
>
> outlineView:viewForTableColumn:item: is where you can create custom views.
I use this delegate method also to return a custom cell view. I have different
views for group and regular cells. The problem is that the view position comes
next to the disclosure button cell and not instead of it so the disclosure cell
appearance stays default no matter what i try to do.
And this is what apple documentation says on this:
outlineView:willDisplayOutlineCell:forTableColumn:item:
Informs the delegate that an outline view is about to display a cell
used to draw the expansion symbol.
- (void)outlineView:(NSOutlineView *)outlineView willDisplayOutlineCell:(id)cell
forTableColumn:(NSTableColumn *)tableColumn item:(id)item
Discussion
Informs the delegate that outlineView is about to display
cell—an expandable cell (a cell that has the
expansion symbol)—for the column and item specified by
tableColumn and item. The delegate can modify
cell to alter its display attributes.
This method is not invoked when outlineView is about to display a
non-expandable cell.
So the cell has to be expandable to get this call
>
> ----- Original Message -----
> From: "Nava Carmon" <ncar...@mac.com>
> To: cocoa-dev@lists.apple.com
> Sent: Thursday, June 21, 2012 12:27:02 AM
> Subject: willDisplayOutlineCell of view-based NSOutlineView is not called
>
> Hi,
>
> I want to customize the disclosure arrow appearance in my view-based
> NSOutlineView.
> I overrode the willDisplayOutlineCell delegate method, but it's not called.
> The willDisplayCell delegate method - is not called either. Is it known issue
> or I'm missing something?
>
> (The isItemExpandable delegate function and isGroupItem returns YES for the
> expandable cell)
>
> Thanks,
>
> Nava
>
>
>
>
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