void EnlargeNode(IViewerNode node)
{
var geomNode = node.DrawingObject.GeometryObject as AglNode;
geomNode.BoundaryCurve = geomNode.BoundaryCurve.OffsetCurve(geomNode.BoundingBox.Width / 2,
new Point(1, 0));
LayoutHelpers.IncrementalLayout(gViewer.Graph.GeometryGraph, geomNode, gViewer.Graph.LayoutAlgorithmSettings as SugiyamaLayoutSettings);
}