(In reply to Oliver Kellogg from comment #20)

> Git commit 3360998e by Oliver Kellogg.
> Committed on 10/08/2014 at 18:28.
> Pushed by okellogg into branch 'master'.
> [...]
> However, apparently Widget_Utils::closestPoints() still has a bug related to
> anchoring in the NorthWest, West, and SouthWest regions; I'll look into that
> next.

Here is the fix for this problem.

umbrello/widgets/widget_utils.cpp function closestPoints()
- Introduce constants selfLastIndex and otherLastIndex which exclude the
  redundant point in case QPolygonF::isClosed() returns true on self resp.
  other.
- In for-loops over `other' replace upper bound `other.size() - 1' by
  otherLastIndex.
- In for-loops over `self' replace upper bound `self.size() - 1' by
  selfLastIndex.
- In loops of cases NorthWest, SouthWest, NorthEast, and SouthEast, replace
  "<" comparisons by "<=" and replace ">" comparisons by ">=".

The association lines now do attach to the template-class widgets.
However, the attachment points are not always optimal.
Perhaps the algorithm used by Widget_Utils::closestPoints() can be improved.

CCBUG:128351