Are you talking about your new functions that include these lines?:
Yes.
return std::max(grid.snapX(item->rect().x()) - 1, 0L);
return std::max(grid.snapX(item->rect().x() + item->rect().width()) - 1, 0L);
If so, then presumably the off-by-1 error is caused by subtracting 1?
No, the -1 is here to correct the off-by-1 error. The problem is, I compute a rectangle size according to a segment's length (in computeSegmentRect() or something, I don't have the code at hand), and when I try to do the opposite operation (i.e. trying to find the segment's length from the rect's size), I don't get exact same result.
-- Guillaume http://telegraph-road.org
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