private void ExploreAdjacentEdges([NotNull] TVertex u)
{
foreach (TEdge edge in VisitedGraph.AdjacentEdges(u))
{
bool reversed = edge.Target.Equals(u);
TVertex v = reversed ? edge.Source : edge.Target;
OnExamineEdge(edge);
GraphColor vColor = VerticesColors[v];
if (vColor == GraphColor.White)
{
OnTreeEdge(edge, reversed);
VerticesColors[v] = GraphColor.Gray;
OnDiscoverVertex(v);
_vertexQueue.Enqueue(v);
}
else
{
OnNonTreeEdge(edge, reversed);
if (vColor == GraphColor.Gray)
{
OnGrayTarget(edge, reversed);
}
else
{
OnBlackTarget(edge, reversed);
}
}
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
public void WriteVertex(Object sender, VertexEventArgs args)
{
if (m_Colors != null && m_Colors.Contains(args.Vertex))
{
GraphColor c = (GraphColor)m_Colors[args.Vertex];
VertexFormatter.FillColor = GraphColorConverter.Convert(c);
if (c == GraphColor.Black)
{
VertexFormatter.FontColor = Color.White;
}
else
{
VertexFormatter.FontColor = Color.Black;
}
}
else
{
VertexFormatter.StrokeColor = Color.White;
}
if (m_VertexLabels != null)
{
VertexFormatter.Label = m_VertexLabels[args.Vertex].ToString();
}
((GraphvizAlgorithm)sender).Output.Write(VertexFormatter.ToDot());
}
private void VisitEdges(IEdgeEnumerable outEdges, bool forward)
{
IVertex target = null;
foreach (IEdge e in outEdges)
{
OnExamineEdge(e);
if (forward)
{
target = e.Target;
}
else
{
target = e.Source;
}
GraphColor vc = Colors[target];
GraphColor ec = EdgeColors[e];
EdgeColors[e] = GraphColor.Black;
if (vc == GraphColor.White) // tree edge
{
OnTreeEdge(e);
Visit(target);
}
else if (vc == GraphColor.Gray && ec == GraphColor.White)
{
OnBackEdge(e);
}
}
}
public void Visit(TVertex root, int depth)
{
if ((object)root == null)
{
throw new ArgumentNullException("root");
}
Stack <SearchFrame> todo = new Stack <SearchFrame>();
this.VertexColors[root] = GraphColor.Gray;
OnDiscoverVertex(root);
var cancelManager = this.Services.CancelManager;
todo.Push(new SearchFrame(root, this.VisitedGraph.OutEdges(root).GetEnumerator()));
while (todo.Count > 0)
{
if (cancelManager.IsCancelling)
{
return;
}
var frame = todo.Pop();
var u = frame.Vertex;
var edges = frame.Edges;
while (edges.MoveNext())
{
TEdge e = edges.Current;
if (cancelManager.IsCancelling)
{
return;
}
this.OnExamineEdge(e);
TVertex v = e.Target;
GraphColor c = this.VertexColors[v];
switch (c)
{
case GraphColor.White:
OnTreeEdge(e);
todo.Push(new SearchFrame(u, edges));
u = v;
edges = this.VisitedGraph.OutEdges(u).GetEnumerator();
this.VertexColors[u] = GraphColor.Gray;
this.OnDiscoverVertex(u);
break;
case GraphColor.Gray:
OnBackEdge(e); break;
case GraphColor.Black:
OnForwardOrCrossEdge(e); break;
}
}
this.VertexColors[u] = GraphColor.Black;
this.OnFinishVertex(u);
}
}
public static string AsString(this GraphColor obj)
{
switch (obj)
{
case GraphColor.Shibafu:
return("shibafu");
case GraphColor.Momiji:
return("momiji");
case GraphColor.Sora:
return("sora");
case GraphColor.Ichou:
return("ichou");
case GraphColor.Ajisai:
return("ajisai");
case GraphColor.Kuro:
return("kuro");
default:
throw new ArgumentOutOfRangeException(nameof(obj), obj, null);
}
}
public static DirectedGraph ToDirectedGraphML <TVertex, TEdge>(
[NotNull] this IVertexAndEdgeListGraph <TVertex, TEdge> graph,
[NotNull] Func <TVertex, GraphColor> verticesColors)
where TEdge : IEdge <TVertex>
{
if (verticesColors is null)
{
throw new ArgumentNullException(nameof(verticesColors));
}
return(ToDirectedGraphML(
graph,
graph.GetVertexIdentity(),
graph.GetEdgeIdentity(),
(vertex, node) =>
{
GraphColor color = verticesColors(vertex);
switch (color)
{
case GraphColor.Black:
node.Background = "Black";
break;
case GraphColor.Gray:
node.Background = "LightGray";
break;
case GraphColor.White:
node.Background = "White";
break;
}
},
null));
}
/// <summary>
/// Create a merged path.
/// </summary>
/// <remarks>
/// <para>
/// This method creates an edge path that stops if an edge is not white
/// or the edge has no more predecessors.
/// </para>
/// </remarks>
/// <param name="se">end edge</param>
/// <param name="colors">edge color dictionary</param>
/// <returns>path to edge</returns>
public EdgeCollection MergedPath(IEdge se, EdgeColorDictionary colors)
{
EdgeCollection path = new EdgeCollection();
IEdge ec = se;
GraphColor c = colors[ec];
if (c != GraphColor.White)
{
return(path);
}
else
{
colors[ec] = GraphColor.Black;
}
path.Insert(0, ec);
while (EdgePredecessors.Contains(ec))
{
IEdge e = EdgePredecessors[ec];
c = colors[e];
if (c != GraphColor.White)
{
return(path);
}
else
{
colors[e] = GraphColor.Black;
}
path.Insert(0, e);
ec = e;
}
return(path);
}
public ICollection <TEdge> MergedPath(TEdge se, IDictionary <TEdge, GraphColor> colors)
{
List <TEdge> path = new List <TEdge>();
TEdge ec = se;
GraphColor c = colors[ec];
if (c != GraphColor.White)
{
return(path);
}
else
{
colors[ec] = GraphColor.Black;
}
path.Insert(0, ec);
while (EdgePredecessors.ContainsKey(ec))
{
TEdge e = EdgePredecessors[ec];
c = colors[e];
if (c != GraphColor.White)
{
return(path);
}
else
{
colors[e] = GraphColor.Black;
}
path.Insert(0, e);
ec = e;
}
return(path);
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
public void WriteEdge(Object sender, EdgeEventArgs args)
{
if (m_EdgeColors != null && m_EdgeColors.Contains(args.Edge))
{
GraphColor c = (GraphColor)m_EdgeColors[args.Edge];
switch (c)
{
case GraphColor.White:
EdgeFormatter.Style = GraphvizEdgeStyle.Unspecified;
EdgeFormatter.StrokeColor = Color.Black;
break;
case GraphColor.Gray:
EdgeFormatter.Style = GraphvizEdgeStyle.Bold;
EdgeFormatter.StrokeColor = Color.Gray;
break;
case GraphColor.Black:
EdgeFormatter.Style = GraphvizEdgeStyle.Bold;
EdgeFormatter.StrokeColor = Color.Black;
break;
}
}
else
{
EdgeFormatter.Style = GraphvizEdgeStyle.Unspecified;
}
if (EdgeLabels != null)
{
EdgeFormatter.Label.Value = EdgeLabels[args.Edge].ToString();
}
((GraphvizAlgorithm)sender).Output.Write(EdgeFormatter.ToDot());
}
/// <summary>
/// 初始化指定大小的组图容器
/// </summary>
/// <param name="subSize"></param>
public SubChart(Size subSize)
{
totalChartArea = new Rectangle(0, 0, subSize.Width, subSize.Height);
totalChartColor = new GraphColor(Color.White, Color.White);
subCharts = new Chart2D[rows, cols];
subRectangles = SetSubChart();
}
/// <summary>
/// 初始化默认组图容器（默认长宽为800*500，行列数均为1，边距为0）
/// </summary>
public SubChart()
{
totalChartArea = new Rectangle(0, 0, 500, 800);
totalChartColor = new GraphColor(Color.White, Color.White);
subCharts = new Chart2D[rows, cols];
subRectangles = SetSubChart();
}
public static DirectedGraph ToDirectedGraphML <TVertex, TEdge>(
[NotNull] this IVertexAndEdgeListGraph <TVertex, TEdge> visitedGraph,
[NotNull] Func <TVertex, GraphColor> vertexColors)
where TEdge : IEdge <TVertex>
{
return(ToDirectedGraphML(
visitedGraph,
visitedGraph.GetVertexIdentity(),
visitedGraph.GetEdgeIdentity(),
(vertex, node) =>
{
GraphColor color = vertexColors(vertex);
switch (color)
{
case GraphColor.Black:
node.Background = "Black";
break;
case GraphColor.Gray:
node.Background = "LightGray";
break;
case GraphColor.White:
node.Background = "White";
break;
}
},
null));
}
public void Visit(TVertex u, int depth)
{
if (depth > this.maxDepth)
{
return;
}
if (u == null)
{
throw new ArgumentNullException("u");
}
var cancelManager = this.Services.CancelManager;
if (cancelManager.IsCancelling)
{
return;
}
VertexColors[u] = GraphColor.Gray;
OnDiscoverVertex(u);
TVertex v = default(TVertex);
foreach (var e in VisitedGraph.AdjacentEdges(u))
{
if (cancelManager.IsCancelling)
{
return;
}
OnExamineEdge(e);
if (u.Equals(e.Source))
{
v = e.Target;
}
else
{
v = e.Source;
}
GraphColor c = VertexColors[v];
if (c == GraphColor.White)
{
OnTreeEdge(e);
Visit(v, depth + 1);
}
else if (c == GraphColor.Gray)
{
OnBackEdge(e);
}
else
{
OnForwardOrCrossEdge(e);
}
}
VertexColors[u] = GraphColor.Black;
OnFinishVertex(u);
}
/// <summary>
/// Does a depth first search on the vertex u
/// </summary>
/// <param name="u">vertex to explore</param>
/// <param name="depth">current recursion depth</param>
/// <exception cref="ArgumentNullException">u cannot be null</exception>
public void Visit(IVertex u, int depth)
{
if (depth > this.maxDepth)
{
return;
}
if (u == null)
{
throw new ArgumentNullException("u");
}
Colors[u] = GraphColor.Gray;
OnDiscoverVertex(u);
IVertex v = null;
foreach (IEdge e in VisitedGraph.OutEdges(u))
{
OnExamineOutEdge(e);
v = e.Target;
GraphColor c = Colors[v];
if (c == GraphColor.White)
{
OnTreeOutEdge(e);
Visit(v, depth + 1);
}
else if (c == GraphColor.Gray)
{
OnBackOutEdge(e);
}
else
{
OnForwardOrCrossOutEdge(e);
}
}
foreach (IEdge e in VisitedGraph.InEdges(u))
{
OnExamineInEdge(e);
v = e.Source;
GraphColor c = Colors[v];
if (c == GraphColor.White)
{
OnTreeInEdge(e);
Visit(v, depth + 1);
}
else if (c == GraphColor.Gray)
{
OnBackInEdge(e);
}
else
{
OnForwardOrCrossInEdge(e);
}
}
Colors[u] = GraphColor.Black;
OnFinishVertex(u);
}
internal ChartStyle(Chart2D ct2d)
{
chart2d = ct2d;
chartArea = new Rectangle(new Point(0, 0), chart2d.ChartSize);
chartAreaColor = new GraphColor(Color.White, Color.White);
plotAreaColor = new GraphColor();
XOffset = ChartArea.Width / 30.0f;
YOffset = ChartArea.Height / 30.0f;
}
/// <summary>
/// Converts GraphColor to System.Drawing.Color
/// </summary>
/// <param name="c">graph color to convert</param>
/// <returns>corresponding Color</returns>
public static Color Convert(GraphColor c)
{
switch(c)
{
case GraphColor.Gray: return Color.Gray;
case GraphColor.Black: return Color.Black;
default:
return Color.White;
}
}
/// <summary>
/// Determines whether this EdgeGraphColorDictionary contains a specific value.
/// </summary>
/// <param name="value">
/// The GraphColor value to locate in this EdgeGraphColorDictionary.
/// </param>
/// <returns>
/// true if this EdgeGraphColorDictionary contains an element with the specified value;
/// otherwise, false.
/// </returns>
public bool ContainsValue(GraphColor value)
{
foreach (GraphColor item in this.Dictionary.Values)
{
if (item == value)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Converts GraphColor to System.Drawing.Color
/// </summary>
/// <param name="c">graph color to convert</param>
/// <returns>corresponding Color</returns>
public static Color Convert(GraphColor c)
{
switch (c)
{
case GraphColor.Gray: return(Color.Gray);
case GraphColor.Black: return(Color.Black);
default:
return(Color.White);
}
}
public bool PaintBlack()
{
if (Color == GraphColor.Gray)
{
if (Exits.Any(x => x.Color == GraphColor.Black))
{
Color = GraphColor.Black;
return(true);
}
}
return(false);
}
/// <summary>
/// Does a depth first search on the vertex u
/// </summary>
/// <param name="se">edge to explore</param>
/// <param name="depth">current exploration depth</param>
/// <exception cref="ArgumentNullException">se cannot be null</exception>
private void Visit(TEdge se, int depth)
{
if (depth > this.maxDepth)
{
return;
}
if (se == null)
{
throw new ArgumentNullException("se");
}
if (this.IsAborting)
{
return;
}
// mark edge as gray
this.EdgeColors[se] = GraphColor.Gray;
// add edge to the search tree
OnTreeEdge(se);
// iterate over out-edges
foreach (TEdge e in this.VisitedGraph.OutEdges(se.Target))
{
if (this.IsAborting)
{
return;
}
// check edge is not explored yet,
// if not, explore it.
if (!this.EdgeColors.ContainsKey(e))
{
OnDiscoverTreeEdge(se, e);
Visit(e, depth + 1);
}
else
{
GraphColor c = this.EdgeColors[e];
if (EdgeColors[e] == GraphColor.Gray)
{
OnBackEdge(e);
}
else
{
OnForwardOrCrossEdge(e);
}
}
}
// all out-edges have been explored
this.EdgeColors[se] = GraphColor.Black;
OnFinishEdge(se);
}
public void Visit(TVertex s)
{
if (this.IsAborting)
{
return;
}
this.VertexColors[s] = GraphColor.Gray;
OnDiscoverVertex(s);
this.vertexQueue.Push(s);
while (this.vertexQueue.Count != 0)
{
if (this.IsAborting)
{
return;
}
TVertex u = this.vertexQueue.Pop();
OnExamineVertex(u);
foreach (TEdge e in VisitedGraph.AdjacentEdges(u))
{
TVertex v = (e.Source.Equals(u)) ? e.Target : e.Source;
OnExamineEdge(e);
GraphColor vColor = VertexColors[v];
if (vColor == GraphColor.White)
{
OnTreeEdge(e);
VertexColors[v] = GraphColor.Gray;
OnDiscoverVertex(v);
this.vertexQueue.Push(v);
}
else
{
OnNonTreeEdge(e);
if (vColor == GraphColor.Gray)
{
OnGrayTarget(e);
}
else
{
OnBlackTarget(e);
}
}
}
VertexColors[u] = GraphColor.Black;
OnFinishVertex(u);
}
}
public State(XElement element, StateMachine machine)
{
this.Element = element;
this.Machine = machine;
Color = GraphColor.White;
Exits = new List <State>();
ReferenceID = Element.Attribute(XName.Get("Name", Machine.Namespaces.LookupNamespace("x")))?.Value ?? DateTime.Now.Ticks.ToString();
DisplayName = Element.Attribute("DisplayName")?.Value ?? "State";
string isFinalValue = Element.Attribute("IsFinal")?.Value ?? string.Empty;
IsFinal = isFinalValue.Equals(bool.TrueString, StringComparison.InvariantCultureIgnoreCase);
}
public Legend()
{
//chart2d = ct2d;
isLegendVisible = true;
isInside = true;
legendPosition = LegendPositionEnum.NorthEast;
isVertical = true;
isBorderVisible = true;
legendColor = new GraphColor();
textStyle = new TextStyle();
textStyle.TextSize = 8f;
xLgOffSet = 8f;
yLgOffSet = 8f;
}
/// <summary>
/// Does a depth first search on the vertex u
/// </summary>
/// <param name="se">edge to explore</param>
/// <param name="depth">current exploration depth</param>
/// <exception cref="ArgumentNullException">se cannot be null</exception>
private void Visit(TEdge se, int depth)
{
Contract.Requires(se != null);
Contract.Requires(depth >= 0);
if (depth > this.maxDepth)
{
return;
}
// mark edge as gray
this.EdgeColors[se] = GraphColor.Gray;
// add edge to the search tree
OnTreeEdge(se);
var cancelManager = this.Services.CancelManager;
// iterate over out-edges
foreach (var e in this.VisitedGraph.OutEdges(se.Target))
{
if (cancelManager.IsCancelling)
{
return;
}
// check edge is not explored yet,
// if not, explore it.
if (!this.EdgeColors.ContainsKey(e))
{
OnDiscoverTreeEdge(se, e);
Visit(e, depth + 1);
}
else
{
GraphColor c = this.EdgeColors[e];
if (EdgeColors[e] == GraphColor.Gray)
{
OnBackEdge(e);
}
else
{
OnForwardOrCrossEdge(e);
}
}
}
// all out-edges have been explored
this.EdgeColors[se] = GraphColor.Black;
OnFinishEdge(se);
}
/// <summary>
/// Computes the bfs starting at s without initalization.
/// </summary>
/// <param name="s">starting vertex</param>
/// <param name="depth">current depth</param>
/// <exception cref="ArgumentNullException">s is null</exception>
public void Visit(IVertex s)
{
if (s == null)
{
throw new ArgumentNullException("Start vertex is null");
}
Colors[s] = GraphColor.Gray;
OnDiscoverVertex(s);
m_Q.Push(s);
while (m_Q.Count != 0)
{
IVertex u = (IVertex)m_Q.Peek();
m_Q.Pop();
OnExamineVertex(u);
foreach (IEdge e in VisitedGraph.OutEdges(u))
{
IVertex v = e.Target;
OnExamineEdge(e);
GraphColor vColor = Colors[v];
if (vColor == GraphColor.White)
{
OnTreeEdge(e);
Colors[v] = GraphColor.Gray;
OnDiscoverVertex(v);
m_Q.Push(v);
}
else
{
OnNonTreeEdge(e);
if (vColor == GraphColor.Gray)
{
OnGrayTarget(e);
}
else
{
OnBlackTarget(e);
}
}
}
Colors[u] = GraphColor.Black;
OnFinishVertex(u);
}
}
public void AddNode(
object identity,
string label = null,
Style style = Style.Default,
Shape shape = Shape.Default,
GraphColor color = GraphColor.Default)
{
Node node = GetOrAddNode(identity, label, style, shape, color);
if (node.PostponeGeneration)
{
return;
}
GenerateNode(node);
}
public void AddNode(
object identity,
string label = null,
Style style = Style.Default,
Shape shape = Shape.Default,
GraphColor color = GraphColor.Default)
{
Node node = GetOrAddNode(identity, label, style, shape, color);
if (node.PostponeGeneration)
{
return;
}
GenerateNode(node);
}
/// <summary>
/// Visits vertex s
/// </summary>
/// <param name="u">vertex to visit</param>
public void Visit(IVertex u)
{
VertexEventArgs uArgs = new VertexEventArgs(u);
Colors[u] = GraphColor.Gray;
if (DiscoverVertex != null)
{
DiscoverVertex(this, uArgs);
}
foreach (IEdge e in VisitedGraph.OutEdges(u))
{
EdgeEventArgs eArgs = new EdgeEventArgs(e);
if (ExamineEdge != null)
{
ExamineEdge(this, eArgs);
}
GraphColor vc = Colors[e.Target];
GraphColor ec = EdgeColors[e];
EdgeColors[e] = GraphColor.Black;
if (vc == GraphColor.White) // tree edge
{
if (TreeEdge != null)
{
TreeEdge(this, eArgs);
}
Visit(e.Target);
}
else if (vc == GraphColor.Gray && ec == GraphColor.White)
{
if (BackEdge != null)
{
BackEdge(this, eArgs);
}
}
}
Colors[u] = GraphColor.Black;
if (FinishVertex != null)
{
FinishVertex(this, uArgs);
}
}
private void Visit(TVertex u, int depth)
{
if (depth > this.MaxDepth)
{
return;
}
if (this.IsAborting)
{
return;
}
VertexColors[u] = GraphColor.Gray;
OnDiscoverVertex(u);
foreach (TEdge e in VisitedGraph.OutEdges(u))
{
if (this.IsAborting)
{
return;
}
OnExamineEdge(e);
TVertex v = e.Target;
if (!this.VertexColors.ContainsKey(v))
{
OnTreeEdge(e);
Visit(v, depth + 1);
}
else
{
GraphColor c = VertexColors[v];
if (c == GraphColor.Gray)
{
OnBackEdge(e);
}
else
{
OnForwardOrCrossEdge(e);
}
}
}
VertexColors[u] = GraphColor.Black;
OnFinishVertex(u);
}
private void FlushVisitQueue()
{
var cancelManager = this.Services.CancelManager;
while (this.vertexQueue.Count != 0)
{
if (cancelManager.IsCancelling)
{
return;
}
TVertex u = this.vertexQueue.Dequeue();
OnExamineVertex(u);
foreach (var e in VisitedGraph.AdjacentEdges(u))
{
TVertex v = (e.Source.Equals(u)) ? e.Target : e.Source;
OnExamineEdge(e);
GraphColor vColor = VertexColors[v];
if (vColor == GraphColor.White)
{
OnTreeEdge(e);
VertexColors[v] = GraphColor.Gray;
OnDiscoverVertex(v);
this.vertexQueue.Enqueue(v);
}
else
{
OnNonTreeEdge(e);
if (vColor == GraphColor.Gray)
{
OnGrayTarget(e);
}
else
{
OnBlackTarget(e);
}
}
}
VertexColors[u] = GraphColor.Black;
OnFinishVertex(u);
}
}
private void ProcessEdge(int depth, [NotNull] TVertex vertex, [NotNull] TEdge edge)
{
GraphColor color = VerticesColors[vertex];
if (color == GraphColor.White)
{
OnTreeEdge(edge);
Visit(vertex, depth + 1);
}
else if (color == GraphColor.Gray)
{
OnBackEdge(edge);
}
else
{
OnForwardOrCrossEdge(edge);
}
}
/// <summary>
/// Converts GraphColor to System.Drawing.Color
/// </summary>
/// <param name="c">graph color to convert</param>
/// <param name="alpha">alpha component</param>
/// <returns>corresponding Color</returns>
public static Color Convert(GraphColor c, int alpha)
{
Color col;
switch(c)
{
case GraphColor.Gray:
col=Color.Gray;
break;
case GraphColor.Black:
col=Color.Black;
break;
default:
col=Color.White;
break;
}
return Color.FromArgb(alpha,col.R,col.G,col.B);
}
private void ProcessEdge(int depth, TVertex v, TEdge e)
{
GraphColor c = VertexColors[v];
if (c == GraphColor.White)
{
OnTreeEdge(e);
Visit(v, depth + 1);
}
else if (c == GraphColor.Gray)
{
OnBackEdge(e);
}
else
{
OnForwardOrCrossEdge(e);
}
}
/// <summary>
/// Adds an element with the specified key and value to this EdgeGraphColorDictionary.
/// </summary>
/// <param name="key">
/// The Edge key of the element to add.
/// </param>
/// <param name="value">
/// The GraphColor value of the element to add.
/// </param>
public void Add(IEdge key, GraphColor value)
{
this.Dictionary.Add(key, value);
}
/// <summary>
/// Determines whether this VertexColorDictionary contains a specific value.
/// </summary>
/// <param name="value">
/// The GraphColor value to locate in this VertexColorDictionary.
/// </param>
/// <returns>
/// true if this VertexColorDictionary contains an element with the specified value;
/// otherwise, false.
/// </returns>
public virtual bool ContainsValue(GraphColor value)
{
foreach (GraphColor item in this.Dictionary.Values)
{
if (item == value)
return true;
}
return false;
}
/// <summary>
/// Adds an element with the specified key and value to this VertexColorDictionary.
/// </summary>
/// <param name="key">
/// The Vertex key of the element to add.
/// </param>
/// <param name="value">
/// The GraphColor value of the element to add.
/// </param>
public virtual void Add(IVertex key, GraphColor value)
{
this.Dictionary.Add(key, value);
}
private Node GetOrAddNode(object identity, string label, Style style, Shape shape, GraphColor color)
{
Node node;
if (!nodes.TryGetValue(identity, out node))
{
int index = nodes.Count;
node = new Node
{
Index = index,
Label = label,
Style = style,
Shape = shape,
Color = color,
PostponeGeneration = label == null,
};
nodes.Add(identity, node);
}
else
{
if (node.Label == null)
{
node.Label = label;
}
if (node.Style == Style.Default)
{
node.Style = style;
}
if (node.Shape == Shape.Default)
{
node.Shape = shape;
}
if (node.Color == GraphColor.Default)
{
node.Color = color;
}
}
return node;
}
private string ColorToText(GraphColor color)
{
string name = Enum.GetName(typeof(GraphColor), color);
return name.ToLower();
}