Mac Forum / Programming / Mac Programming / August 2005

i want to vertically center a line of text inside a rect, and draw it in a
certain font.

 -(void)drawString:(NSString*)string
  inRect:(NSRect)rect font:(NSFont*)font
   {
     NSDictionary*  attr = nil;
     float          hght = [font defaultLineHeightForFont];
     NSPoint        nspt = rect.origin;

     nspt.y += ceil((rect.size.height - hght) / 2.0);

     attr = [NSDictionary dictionaryWithObjectsAndKeys:
      font, NSFontAttributeName, nil];

     [string drawAtPoint:nspt withAttributes:attr];
   }

i would think that would be the obvious way to go about it, and it looks fine
for a lot of fonts.  but i'd say maybe half have issues, where they appear too
low or too high within the rect.  is there some other algorithm i could try
that would work better in the general case?