public DijkstraAnimation(Canvas c) : base()
{
popped = new Nodes();
pushing = new Nodes();
incomingEdge = new Hashtable();
proposedWeight = new Hashtable();
pq = new BinaryPriorityQueue(Node.sortAscending());
graph = new Graph(); //empty graph until initialized.
this.c = c;
t = new Thread(new ThreadStart(Run));
}