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virtual void Inkscape::XML::Node::addSubtreeObserver ( NodeObserver observer) [pure virtual]

Add an object that will be notified of the changes to this node and its descendants.

The difference between adding a regular observer and a subtree observer is that the subtree observer will also be notified if a change occurs to any of the node's descendants, while a regular observer will only be notified of changes to the node it was assigned to.

observerThe observer object

Implemented in Inkscape::XML::SimpleNode.

Referenced by Inkscape::Preferences::addObserver().

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