mweyamutsvene

//Draw the shadow for center component
  CGContextSetFillColorWithColor( ctx, [UIColor colorWithWhite:.1 alpha:.4].CGColor );
  CGContextFillEllipseInRect( ctx, CGRectInset(self.bounds, CENTER_INSET-4, CENTER_INSET-4) );
  
  //Draw center transparent mask
  CGContextSetFillColorWithColor( ctx, [UIColor clearColor].CGColor );
  CGContextSetBlendMode(ctx, kCGBlendModeClear);
  CGContextFillEllipseInRect( ctx, CGRectInset(self.bounds, CENTER_INSET, CENTER_INSET) );