cocoa - Draw grid lines in NSTableView only for populated rows?

Question

How can I draw grid lines in an NSTableView only for rows that are populated? When I set the grid style mask to NSTableViewSolidHorizontalGridStyleMask, it draws grid lines for all rows whether populated or not.

I'm looking for a bit of sample code to do this.

Answer 1

What I found to work best for me so far is the following code. Just fool the original grid drawing code to draw only on populated rows.

Subclass NSTableView, if needed, and override drawGridInClipRect:(NSRect)clipRect as following:

- (void)drawGridInClipRect:(NSRect)clipRect
{
    NSRect lastRowRect = [self rectOfRow:[self numberOfRows]-1];
    NSRect myClipRect = NSMakeRect(0, 0, lastRowRect.size.width, NSMaxY(lastRowRect));
    NSRect finalClipRect = NSIntersectionRect(clipRect, myClipRect);
    [super drawGridInClipRect:finalClipRect];
}