FXAttachment.java 文件源码

@Override
public void addGeometry(Geometry geom) {
    super.addGeometry(geom);

    if (fxAttachmentNode == null) {
        fxAttachmentNode = new Group();
    }

    if (knownParts == null) {
        knownParts = new ArrayList<>();
    }

    // If the geometry is not recognized, add it
    if (!knownParts.contains(geom)) {

        // Register to listen for changes from the geometry or its children
        // INodes
        geom.eAdapters().add(new EContentAdapter() {

            @Override
            public void notifyChanged(Notification notification) {
                handleUpdate(geom, notification);
            }
        });

        // Add the geometry to the list of known parts
        knownParts.add(geom);

        // Have the geometry refreshed when it is added
        handleUpdate(geom, null);

    }
}