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();
}
}