private void breadthFirstSearchItem_Click(object sender, System.EventArgs e)
{
if (this.netronPanel.Graph == null)
{
throw new Exception("Generate a graph first");
}
if (this.netronPanel.Populator == null)
{
throw new Exception("Populator should not be null.");
}
ResetVertexAndEdgeColors();
// create algorithm
this.edgeColors = new EdgeColorDictionary();
foreach (IEdge edge in this.netronPanel.Graph.Edges)
{
this.edgeColors[edge] = GraphColor.White;
}
this.vertexColors = new VertexColorDictionary();
BreadthFirstSearchAlgorithm bfs = new BreadthFirstSearchAlgorithm(
this.netronPanel.Graph,
new VertexBuffer(),
this.vertexColors);
// create tracer
LayoutAlgorithmTraverVisitor tracer = new LayoutAlgorithmTraverVisitor(this.netronPanel.Populator);
// link to algo
bfs.RegisterTreeEdgeBuilderHandlers(tracer);
bfs.RegisterVertexColorizerHandlers(tracer);
bfs.TreeEdge += new EdgeEventHandler(dfs_TreeEdge);
bfs.NonTreeEdge += new EdgeEventHandler(dfs_BackEdge);
bfs.BlackTarget += new EdgeEventHandler(dfs_ForwardOrCrossEdge);
// add handler to tracers
tracer.UpdateVertex += new ShapeVertexEventHandler(tracer_UpdateVertex);
tracer.UpdateEdge += new ConnectionEdgeEventHandler(tracer_UpdateEdge);
// running algorithm
VertexMethodCaller vm =
new VertexMethodCaller(
new ComputeVertexDelegate(bfs.Compute),
Traversal.FirstVertex(this.netronPanel.Graph)
);
Thread thread = new Thread(new ThreadStart(vm.Run));
thread.Start();
}
static void Main(string[] args)
{
try
{
/*
* VertexStringDictionary verticesNames = new VertexStringDictionary();
* EdgeStringDictionary edgesNames = new EdgeStringDictionary();
* EdgeDoubleDictionary edgesWeights = new EdgeDoubleDictionary();
* IncidenceGraph g = new IncidenceGraph(true);
*
* // adding vertex
* Vertex u = g.AddVertex();
* verticesNames[u]="u";
* Vertex v = g.AddVertex();
* verticesNames[v]="v";
* Vertex w = g.AddVertex();
* verticesNames[w]="w";
* Vertex x = g.AddVertex();
* verticesNames[x]="x";
* Vertex y = g.AddVertex();
* verticesNames[y]="y";
* Vertex z = g.AddVertex();
* verticesNames[z]="z";
*
* // adding edges
* Edge uv = g.AddEdge(u,v);
* edgesNames[uv]="uv";
* edgesWeights[uv]=1;
* Edge ux = g.AddEdge(u,x);
* edgesNames[ux]="ux";
* edgesWeights[ux]=0.8;
* Edge wu = g.AddEdge(w,u);
* g.AddEdge(w,u);
* edgesNames[wu]="wu";
* edgesWeights[wu]=0.2;
* Edge xv = g.AddEdge(x,v);
* edgesNames[xv]="xv";
* edgesWeights[xv]=1.1;
* Edge vy = g.AddEdge(v,y);
* edgesNames[vy]="vy";
* edgesWeights[vy]=2.0;
* Edge wy = g.AddEdge(w,y);
* edgesNames[wy]="wy";
* edgesWeights[wy]=1.5;
* Edge yw = g.AddEdge(y,w);
* edgesNames[yw]="yw";
* edgesWeights[yw]=0.2;
* Edge wz = g.AddEdge(w,z);
* edgesNames[wz]="wz";
* edgesWeights[wz]=0.1;
*
* RandomGraph.Graph(g, 20,50,new Random(),true);
*
* /*
* // do a dfs serach
* Console.WriteLine("---- DepthFirstSearch");
* DepthFirstSearchAlgorithm dfs = new DepthFirstSearchAlgorithm(g);
* //TestDepthFirstSearchVisitor dfsVis =
* // new TestDepthFirstSearchVisitor(dfs,verticesNames);
* AlgorithmTracerVisitor dfstracer = new
* AlgorithmTracerVisitor(g,"dfs",".",GraphvizImageType.Png);
* dfstracer.VertexLabels = verticesNames;
* dfstracer.RegisterVertexHandlers(dfs);
* dfstracer.RegisterEdgeHandlers(dfs);
*
* dfs.Compute();
*/
Vertex source = u;
source = RandomGraph.Vertex(g, new Random());
Console.WriteLine("source: {0}", source.GetHashCode());
Console.WriteLine("---- BreathFirstSearch");
BreadthFirstSearchAlgorithm bfs = new BreadthFirstSearchAlgorithm(g);
TestBreadthFirstSearchVisitor bfsVis
= new TestBreadthFirstSearchVisitor(bfs, verticesNames, source);
AlgorithmTracerVisitor bfstracer = new
AlgorithmTracerVisitor(g, "bfs", ".", GraphvizImageType.Png);
// bfstracer.VertexLabels = verticesNames;
bfs.RegisterTreeEdgeBuilderHandlers(bfsTracer);
bfs.RegisterVertexColorizeHandlers(bfsTracer);
bfs.Compute(source);
/*
* Console.WriteLine("---- Dijkstra");
* DijkstraShortestPathAlgorithm dij = new DijkstraShortestPathAlgorithm(
* g,
* edgesWeights
* );
* TestDijkstraShortestPathVisitor dijVis = new TestDijkstraShortestPathVisitor(dij,verticesNames);
* AlgorithmTracerVisitor dijtracer = new
* AlgorithmTracerVisitor(g,"dij",".",GraphvizImageType.Png);
* dijtracer.VertexLabels = verticesNames;
* dijtracer.EdgeLabels = edgesWeights;
* dijtracer.RegisterVertexHandlers(dij);
* // dijtracer.RegisterEdgeHandlers(dij);
* dij.Compute(g.Vertex(0));
*
* Console.WriteLine("Distance from {0}", verticesNames[g.Vertex(0)]);
* foreach(DictionaryEntry de in dij.Distances)
* {
*
* Console.WriteLine("\t-> {0}, {1}",
* verticesNames[(Vertex)de.Key],
* de.Value.ToString()
* );
* }
*
* Console.WriteLine("---- Topological sort");
* VertexCollection vs = new VertexCollection();
* TopologicalSortAlgorithm tps= new TopologicalSortAlgorithm(g);
* tps.Compute(vs);
* foreach(Vertex ve in vs)
* {
* Console.WriteLine("v - {0}",verticesNames[ve]);
* }
*
* Console.WriteLine("--- graphviz output");
* GraphvizWriterAlgorithm gw = new GraphvizWriterAlgorithm(
* g,"dotgenerator",".",GraphvizImageType.Png);
* TestGraphvizVertex gv = new TestGraphvizVertex(verticesNames);
* gw.WriteVertex += new VertexHandler( gv.WriteVertex );
* gw.WriteEdge+= new EdgeHandler( gv.WriteEdge );
* gw.Write(GraphvizImageType.Png);
* gw.Write(GraphvizImageType.Svg);
* gw.Write(GraphvizImageType.Svgz);
* gw.Write(GraphvizImageType.Gif);
* gw.Write(GraphvizImageType.Jpeg);
*/
Console.WriteLine("Test finished");
String s2 = Console.ReadLine();
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
String s = Console.ReadLine();
}
}