On 06/07/2010, at 4:56 AM, Rainer Standke wrote:
> setEnabled works on single cells, and as expected: the outline row's button
> is grayed out. Oddly, setTransparent affects all cells in the column, i.e.
> the button appears in no row, not even the ones that have no children.
>
> That's confusingly inconsistent, to me. What should I do to make invisible
> only the checkboxes in the row that have a twirly triangle?
There is only one cell, reused for each row in the column as needed.
Therefore you not only need to disable the cell/make it transparent, but set
the opposite state for all other rows, otherwise it just remains in the last
state you set.
If you just want to hide it for 'parent' items, this method can also refer to
the other delegate method - (BOOL)outlineView:(NSOutlineView *)outlineView
isGroupItem:(id)item. Presumably your controller/data model can determine which
items are parent items since the outline view is told this information by you:
- (void)outlineView:(NSOutlineView *)outlineView willDisplayCell:(id)cell
forTableColumn:(NSTableColumn *)tableColumn item:(id)item
{
if ( [[tableColumn identifier] isEqualToString:@"toReconnect"] )
{
[cell setEnabled:![self outlineView:outlineView
isGroupItem:item]];
[cell setTransparent:[self outlineView:outlineView
isGroupItem:item]];
}
}
--Graham
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