// ====================================================================
private void findMinSpan() {
route.setText("");
Iterator<BusEdge> it = grafen.minimumSpanningTree();
if (it != null && it.hasNext()) {
double totWeight = 0;
int totNodes = 0; // only for easier testing
karta.clearLayer(DrawGraph.Layer.OVERLAY);
while (it.hasNext()) {
BusEdge be = it.next();
totNodes++;
totWeight += be.getWeight();
route.append(makeText2(be) + "\n");
// draw the MST
BusStop from = noderna.find(be.from);
BusStop to = noderna.find(be.to);
karta.drawLine(
from.xpos, from.ypos, to.xpos, to.ypos, Color.red, 2.5, DrawGraph.Layer.OVERLAY);
}
karta.repaint();
route.append("Antal: " + totNodes + " totalvikt: " + totWeight + "\n");
} else from.setText("Det fanns ej någon lösning");
to.setText("");
from.setText("");
} // findMinSpan
