How to NSTableView cell add padding to cell?

Question

I've got an NSTableView which stretches from edge to edge on my window, but the data in the cells on the edge of the table really need some padding. The window doesn't look good if I leave a gutter on the edges, so I'd like to try to add some padding inside some of the cells so the data isn't right up against the edge.

I can't find anything in Interface Builder or in the code documentation about adding padding or insets to the cells.

Any suggestions?

Answer 1

You can subclass NSTextFieldCell and override the drawInteriorWithFrame:inView: method to custom draw the string.

- (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView *)controlView
{
    NSRect titleRect = [self titleRectForBounds:cellFrame];
    NSAttributedString *aTitle = [self attributedStringValue];
    if ([aTitle length] > 0) {
        [aTitle drawInRect:titleRect];
    }
}

where titleRectForBounds: adds some space

- (NSRect)titleRectForBounds:(NSRect)bounds
{
    NSRect titleRect = bounds;

    titleRect.origin.x += 5;
    titleRect.origin.y += 5;

    NSAttributedString *title = [self attributedStringValue];
    if (title) {
        titleRect.size = [title size];
    } else {
        titleRect.size = NSZeroSize;
    }

    // We don't want the width of the string going outside the cell's bounds
    CGFloat maxX = NSMaxX(bounds);
    CGFloat maxWidth = maxX - NSMinX(titleRect);
    if (maxWidth < 0) {
        maxWidth = 0;
    }

    titleRect.size.width = MIN(NSWidth(titleRect), maxWidth);

    return titleRect;
}

There's a more full example at http://comelearncocoawithme.blogspot.com/2011/09/custom-cells-in-nstableview-part-1.html