I think I found it in, at least it looks correct:

CGFloat gb = [[NSTypesetter sharedSystemTypesetter] 
baselineOffsetInLayoutManager:[(NSTextView *)controlView layoutManager] 
glyphIndex:charIndex];

NSRect useFrame = cellFrame;
useFrame.origin.y += gb;

Thanks
  

Am 15.07.2012 um 23:40 schrieb Alexander Reichstadt:

> Hi,
> 
> I have a subclass of NSAttachmentCell which draws itself into an NSTextView. 
> Its y-location is wrong though when drawing the cell using 
> 
> - (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *) controlView 
> characterIndex:(NSUInteger)charIndex layoutManager: (NSLayoutManager 
> *)layoutManager
> 
> How do I determine the correct origin for cellFrame to ensure that the 
> baseline of the text inside the NSTextView matches that of the text inside 
> the cell to be drawn in the textview? In above call I use 
> 
> [self.displayWord drawInRect:cellFrame withAttributes:stringAttributes];
> 
> to draw the string which in turn uses boundingRectWithSize to figure out the 
> NSRect dimensions to accommodate the string?
> 
> Thanks
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