PropagatingStrategy

First visits parent then child until target is reached. Then sets event's bubbling flag to true and visits widgets from target to root.

First visits target then its parent etc, until reaches root. Then sets event's sinking flag to true and visits widgets from root to target.

Visit all the subtree from bottom up. parent gets visited after all its children was visited. Also called Pre-order.

Visits all subtree from root to leafs, visiting parent first and then all its subtrees. Depth-first. Also called Post-order.