Having played around some more, the problem I seem to
be having with this is that the item passed into the
outlineView:heightOfRowByItem: delegate method is of a
private _NSArrayControllerTreeNode class, which means
I can do nothing with it. I therefore need to get the
value in the cell at this position, but that is more
difficult than it seems. I thought I would be able to
do it like this:
NSString *contents = [[[outlineTreeController
arrangedObjects] objectAtIndex:[outlineView
rowForItem:item]] valueForKey:@"contents"];
However, it seems that NSTreeController's
arrangedObjects does not return a simple NSArray -
instead, it returns a private class called
_NSControllerTreeProxy - which doesn't respond to
objectAtIndex:...
This is driving me nuts now... There must be an easy
way to get the value of an object stored at a
particular row and column within an outline view that
uses NSTreeController and bindings, and I must be
missing the obvious...
If anyone could point me in the right direction, I
would be very grateful.
Thanks again,
Keith
---- ORIGINAL MESSAGE ----
Hmm, still struggling with this...
In theory, you should be able to use the new variable
height delegate methods of NSOutlineView and
NSTableView to support arbitrary heights depending on
content, but I am getting some very odd drawing errors
when doing this in an editable outline view. I am
trying to add the outlineView:heightOfRowByItem:
delegate method to the new (Core Data) OutlineEdit
example, but the drawing and selection is going mad. I
have set MyDocument as the delegate and added these
delegate methods:
- (float)outlineView:(NSOutlineView *)outlineView
heightOfRowByItem:(id)item
{
NSTableColumn *tabCol = [[outlineView tableColumns]
objectAtIndex:0];
float width = [tabCol width];
NSRect r = NSMakeRect(0,0,width,1000.0);
NSCell *cell = [tabCol dataCellForRow:[outlineView
rowForItem:item]];
float height = [cell cellSizeForBounds:r].height;
if (height <= 0) height = 16.0;
return height;
}
- (void)outlineView:(NSOutlineView *)outlineView
willDisplayCell:(id)cell forTableColumn:(NSTableColumn
*)tableColumn item:(id)item
{
[cell setWraps:YES];
}
Does anybody know how to do this, or why these methods
would be causing such weird drawing errors?
Many thanks in advance,
Keith
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