public static ParseResults ParseText(string text)
{
int numberOfVertices = 0;
List <Edge> allEdges = new List <Edge>();
using (StringReader reader = new StringReader(text))
{
string line = null;
if (null != (line = reader.ReadLine())) // first line - number of vertices
{
numberOfVertices = int.Parse(line);
}
while (null != (line = reader.ReadLine())) // following lines - edge data
{
if (string.IsNullOrEmpty(line))
{
continue;
}
string[] values = line.Split(';');
int from = int.Parse(values[0]);
int to = int.Parse(values[1]);
int weight = int.Parse(values[2]);
Edge resultEdge = new Edge(from, to, weight);
allEdges.Add(resultEdge);
}
}
ParseResults result = new ParseResults(numberOfVertices, allEdges);
return(result);
}
private void Visualize_Click(object sender, EventArgs e)
{
kruskalTextLabel.Text = "";
ParseResults parsedResult = KruskalTextParser.ParseText(kruskalTextBox.Text);
points = new Point[parsedResult.numberOfVertices];
if (parsedResult.numberOfVertices > 0)
{
double angle = 360 / parsedResult.numberOfVertices;
points[0] = new Point(60, anchor.Y);
for (int i = 1; i < parsedResult.numberOfVertices; i++)
{
points[i] = RotatePoint(points[0], anchor, angle * i);
}
}
allEdges = parsedResult.allEdges;
try
{
Graph graph = new Graph(parsedResult.numberOfVertices);
foreach (Edge edge in allEdges)
{
graph.AddEdge(edge.from, edge.to, edge.weight);
}
kruskalEdges = KruskalNode.Kruskal(graph);
foreach (Edge edge in kruskalEdges)
{
kruskalTextLabel.Text += "" + edge.from + " -> " + edge.to + " = " + edge.weight + "\n";
}
}
catch
{
kruskalTextLabel.Text = "Couldn't execute Kruskal algorithm.";
}
panel1.Invalidate();
}