public void run(double frac) {
TupleSet focus = m_vis.getGroup(Visualization.FOCUS_ITEMS);
if (focus == null || focus.getTupleCount() == 0) return;
Graph g = (Graph) m_vis.getGroup(m_group);
Node f = null;
@SuppressWarnings("unchecked")
Iterator<Node> tuples = focus.tuples();
while (tuples.hasNext() && !g.containsTuple(f = tuples.next())) {
f = null;
}
if (f == null) return;
g.getSpanningTree(f);
}
/**
* Returns the node item which should be used as root of the layout. If the nextRootItem was
* explicitly set, this item is returned, otherwise this method behaves like the getLayoutRoot()
* method from the RadialTreeLayout
*/
public NodeItem getLayoutRoot() {
if (m_root != null) return m_root;
TupleSet ts = m_vis.getGroup(m_group);
if (ts instanceof Graph) {
if (nextRootItem != null) {
((Graph) ts).getSpanningTree(nextRootItem);
NodeItem ret = nextRootItem;
nextRootItem = null;
return ret;
} else {
Tree tree = ((Graph) ts).getSpanningTree();
return (NodeItem) tree.getRoot();
}
} else {
throw new IllegalStateException(
"This action's data group does" + "not resolve to a Graph instance.");
}
}
/** @see prefuse.data.Node#getParentEdge() */
public Edge getParentEdge() {
return m_graph.getSpanningTree().getParentEdge(this);
}
/** @see prefuse.data.Node#getParent() */
public Node getParent() {
return m_graph.getSpanningTree().getParent(this);
}
/** @see prefuse.data.Node#getDepth() */
public int getDepth() {
return m_graph.getSpanningTree().getDepth(m_row);
}
/** @see prefuse.data.Node#childEdges() */
public Iterator childEdges() {
return m_graph.getSpanningTree().childEdges(this);
}
/** @see prefuse.data.Node#getNextSibling() */
public Node getNextSibling() {
return m_graph.getSpanningTree().getNextSibling(this);
}
/** @see prefuse.data.Node#getPreviousSibling() */
public Node getPreviousSibling() {
return m_graph.getSpanningTree().getPreviousSibling(this);
}
/** @see prefuse.data.Node#getLastChild() */
public Node getLastChild() {
return m_graph.getSpanningTree().getLastChild(this);
}
/** @see prefuse.data.Node#getChild(int) */
public Node getChild(int idx) {
return m_graph.getSpanningTree().getChild(this, idx);
}
/** @see prefuse.data.Node#getChildIndex(prefuse.data.Node) */
public int getChildIndex(Node child) {
return m_graph.getSpanningTree().getChildIndex(this, child);
}
/** @see prefuse.data.Node#getChildCount() */
public int getChildCount() {
return m_graph.getSpanningTree().getChildCount(m_row);
}