/// <summary>
///
/// </summary>
/// <param name="graphString"></param>
/// <returns></returns>
public static UGraph JsonToGraph(String graphString)
{
UGraph loadedGraph = new UGraph();
MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(graphString));
DataContractJsonSerializer ser = new DataContractJsonSerializer(loadedGraph.GetType());
loadedGraph = ser.ReadObject(ms) as UGraph;
return(loadedGraph);
}
/// <summary>
///
/// </summary>
public AppContext()
{
Debug.WriteLine("AppContext()");
this.CurrentGraphState = GraphState.None;
this.DrawableEdges = new Dictionary <Guid, DrawableEdge>();
this.DrawableVertices = new Dictionary <Guid, DrawableVertex>();
this.RandomSource = new Random();
this.FitGraphToView = Defines.FIT_GRAPH_TO_VIEW;
this.CurrentGraph = new UGraph();
}
/// <summary>
///
/// </summary>
/// <param name="graph"></param>
/// <returns></returns>
public static String GraphToJson(UGraph graph)
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(UGraph));
MemoryStream memStream = new MemoryStream();
serializer.WriteObject(memStream, graph);
Byte[] json = memStream.ToArray();
String jsonString = Encoding.UTF8.GetString(json, 0, json.Length);
return(jsonString);
}
//private static readonly GraphUtils instance = new GraphUtils();
/// <summary>
///
/// </summary>
//private GraphUtils()
//{
//}
/// <summary>
///
/// </summary>
//public static GraphUtils Instance
//{
// get
// {
// return instance;
// }
//}
/// <summary>
///
/// </summary>
/// <param name="appContext"></param>
/// <returns></returns>
public static UGraph GenerateRandomGraph(AppContext appContext)
{
Int32 numNodes = appContext.RandomSource.Next(Defines.MIN_NUM_NODES, Defines.MAX_NUM_NODES);
//appContext.CurrentGraph = new UGraph();
UGraph outGraph = new UGraph();
//appContext.CurrentGraphState = GraphState.New;
for (Int32 i = 0; i < numNodes; i++)
{
UVertex uv = new UVertex
{
Value = appContext.RandomSource.Next()
};
outGraph.AddVertex(uv);
}
foreach (KeyValuePair <Guid, UVertex> kvp1 in outGraph.Vertices)
{
foreach (KeyValuePair <Guid, UVertex> kvp2 in outGraph.Vertices)
{
if (kvp1.Value.VertexId != kvp2.Value.VertexId)
{
Int32 prob = appContext.RandomSource.Next(1, 10);
if (prob >= Defines.EDGE_PROBABILITY * 10)
{
UEdge ue = new UEdge
{
HeadVertexId = kvp1.Value.VertexId,
TailVertexId = kvp2.Value.VertexId,
Value = appContext.RandomSource.Next()
};
outGraph.Edges.Add(ue.EdgeId, ue);
kvp1.Value.AddNeighbor(kvp2.Value.VertexId);
kvp1.Value.AddEdge(ue.EdgeId);
kvp2.Value.AddNeighbor(kvp1.Value.VertexId);
kvp2.Value.AddEdge(ue.EdgeId);
}
}
}
}
return(outGraph);
}
/// <summary>
///
/// </summary>
/// <param name="file"></param>
private async void LoadGraphFromFile(Windows.Storage.StorageFile file)
{
Windows.Storage.CachedFileManager.DeferUpdates(file);
String jsonString = await Windows.Storage.FileIO.ReadTextAsync(file);
Windows.Storage.Provider.FileUpdateStatus status = await Windows.Storage.CachedFileManager.CompleteUpdatesAsync(file);
if (status == Windows.Storage.Provider.FileUpdateStatus.Complete)
{
this.statusTextBlock.Text = string.Format("file {0} read", file.Name);
UGraph loadedGraph = GraphUtils.JsonToGraph(jsonString);
//ms.Close();
this.appCtx.CurrentGraph = loadedGraph;
// TODO: fire event to update graph;
//DrawingUtils.LayoutDGraphRandom(this.appCtx, this.MainDrawingCanvas, this.appCtx.DrawableEdges, this.appCtx.DrawableVertices);
}
else
{
this.statusTextBlock.Text =
string.Format("file {0} not read", file.Name);
}
}
