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Tool tips in NSTableView

I want to display tool tips for items in a NSTableView (and also in a NSOutlineView, but I figure the solution might be similiar). That is, every item will have a different tool tip...

Looking at the AppKit header files revealed that NSView has a method

- (NSToolTipTag)addToolTipRect:(NSRect)aRect owner:(id)anObject userData:(void *)data;

which looks helpful. However, as so often, the docs only say "Description forthcoming" :/ and I have no clue how I actually would use that method. Userdata seems fair enough, but what exactly does aRect specify? I figure I have to subclass NSToolTipOwner, and handle:

- (NSString *)view:(NSView *)view stringForToolTip:(NSToolTipTag)tag point:(NSPoint)point userData:(void *)data;

Userdata is quite clear; and with point, I guess I could use one handle for my whole tableview, which would be nice; but still, "aRect" puzzles me. Should I pass the full view rect of the view, or a rect of the item or what?!?

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Max Horn
C++/ObjC/Java Developer

email: <mailto:email@hidden>
phone: (+49) 6151-494890



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