/// <summary>
/// Performs the actual layout algorithm. This will execute on a background thread.
/// </summary>
/// <param name="graphData">The object containing the graph data</param>
/// <param name="rootNode">Root node</param>
protected override Dictionary<INodeShape, NodePosition> PerformLayout(GraphMapData graphData, INode rootNode)
{
IList<NodeMapData> nodeVMs = new List<NodeMapData>(graphData.GetNodes());
IDictionary<INodeShape, NodePosition> nodes = new Dictionary<INodeShape, NodePosition>();
double currentAngle = 0; // Represents the current angle
double radius = GetRadius(nodeVMs); // The computed radius of the circle
// Loop through each visible node, perform the appropriate calculations,
// then move it to the correct position on the graph.
bool firstPass = true;
foreach (NodeMapData nodeVM in nodeVMs)
{
// Determine the angle for the current node
if (!firstPass)
currentAngle += GetAngle(nodeVM, radius);
//Calculate radians (radians = degrees * PI/180)
double radians = currentAngle * Math.PI / 180;
double x = Math.Cos(radians) * radius;
double y = Math.Sin(radians) * radius;
// We're no longer on the first pass
firstPass = false;
// Return the node position
nodes.Add(nodeVM, new NodePosition(new Point(x, y), currentAngle));
}
return nodes;
}
/// <summary>
/// Performs the actual layout algorithm.
/// </summary>
/// <param name="graph">The object containing the graph data</param>
/// <param name="rootNode">Root node</param>
protected override void PerformLayout(GraphMapData graph, INode rootNode)
{
double currentAngle = 0D; // Represents the current angle
int numNodes = graph.Nodes.Count;
double angle = GetAngle(numNodes);
double radius = GetRadius(numNodes); // The computed radius of the circle
// Loop through each node, perform the appropriate calculations,
// then move it to the correct position on the graph.
foreach (NodeMapData node in graph.GetNodes())
{
if (rootNode != null && node.Id.Equals(rootNode.ID))
{
Point position = new Point(0D, 0D);
node.Position = position;
}
else
{
//Calculate radians
double radians = Math.PI * currentAngle / 180D;
double x = Math.Cos(radians) * radius;
double y = Math.Sin(radians) * radius;
Point position = new Point(x, y);
node.Position = position;
currentAngle += angle;
}
}
}
/// <summary>
/// Removes node overlap occurring in the input graph
/// </summary>
/// <param name="graph">GraphMapData</param>
public static void FSAOverlapRemoval(GraphMapData graph)
{
ICollection<NodeMapData> nodes = graph.GetNodes();
IDictionary<string, Rect> rectangles = new Dictionary<string, Rect>(nodes.Count);
foreach (NodeMapData node in nodes)
{
Point location = new Point(node.Position.X, node.Position.Y);
Rect rect = new Rect(location, node.Dimension);
rectangles[node.Id] = rect;
}
OverlapRemovalParameters overlapRemovalParameters = new OverlapRemovalParameters()
{
HorizontalGap = 0F,
VerticalGap = 0F
};
FSAAlgorithm<string> overlapRemoval = new FSAAlgorithm<string>(rectangles, overlapRemovalParameters);
overlapRemoval.Compute();
foreach (NodeMapData node in nodes)
{
Rect rect = overlapRemoval.Rectangles[node.Id];
Point pos = new Point(rect.X, rect.Y);
node.Position = pos;
}
}
public static Chart GraphToAnb(GraphMapData graph)
{
Chart chart = new Chart();
chart.chartItemCollection = new ChartItemCollection();
chart.chartItemCollection.chartItems = new Collection<ChartItem>();
foreach (IconNodeMapData node in graph.GetNodes())
{
ChartItem chartItem = new ChartItem();
chart.chartItemCollection.chartItems.Add(chartItem);
chartItem.attrLabel = node.Label;
string hexBackgroundColor = String.Format("#{0:x2}{1:x2}{2:x2}{3:x2}", node.BackgroundColor.A, node.BackgroundColor.R, node.BackgroundColor.G, node.BackgroundColor.B);
chartItem.ciStyle = new CIStyle();
chartItem.ciStyle.font = new Font();
chartItem.ciStyle.font.attrBackColour = hexBackgroundColor;
chartItem.end = new End();
chartItem.end.entity = new Entity();
chartItem.end.entity.icon = new Icon();
chartItem.end.entity.icon.iconStyle = new IconStyle();
chartItem.attributeCollection = new AttributeCollection();
chartItem.attributeCollection.attributes = new Collection<Anb.Attribute>();
foreach (KeyValuePair<string, AttributeMapData> kvp in node.Attributes)
{
Anb.Attribute attribute = new Anb.Attribute();
chartItem.attributeCollection.attributes.Add(attribute);
attribute.attrAttributeClass = kvp.Key;
attribute.attrValue = kvp.Value.Value;
}
}
foreach (EdgeMapData edge in graph.GetEdges())
{
ChartItem chartItem = new ChartItem();
chart.chartItemCollection.chartItems.Add(chartItem);
chartItem.link = new Link();
chartItem.link.attrEnd1Id = edge.Source;
chartItem.link.attrEnd2Id = edge.Target;
chartItem.link.linkStyle = new LinkStyle();
chartItem.link.linkStyle.attrType = edge.Label;
}
return chart;
}
/// <summary>
/// Performs the actual layout algorithm.
/// </summary>
/// <param name="graph">The object containing the graph data</param>
/// <param name="rootNode">Root node</param>
protected override void PerformLayout(GraphMapData graph, INode rootNode)
{
ICollection<NodeMapData> nodes = graph.GetNodes();
// First we determine the amount of space that we are dealing with
double totalArea = 0D;
foreach (NodeMapData node in nodes)
{
double nodeWidth = node.Dimension.Width + MARGIN.Left + MARGIN.Right;
double nodeHeight = node.Dimension.Height + MARGIN.Top + MARGIN.Bottom;
totalArea += nodeWidth * nodeHeight;
}
// TODO NEED TO DECOUPLE THIS
GraphViewModel graphVM = ViewModelLocator.GraphDataStatic;
// Calculate the bounding height and width of our square
double boundingHeight = Math.Sqrt(totalArea);
double boundingWidth = boundingHeight * (graphVM.Width / graphVM.Height);
boundingHeight = boundingHeight / (graphVM.Width / graphVM.Height);
//TODO: THE LINES ABOVE ARE THE ONLY REASON WE ARE COUPLED TO THE GRAPH VIEW MODEL
double currentX = 0D;
double currentY = 0D;
double maxColumnWidth = 0D;
double maxHeight = nodes.Max(node => node.Dimension.Height) + MARGIN.Top + MARGIN.Bottom;
int columnSize = (int)Math.Round(boundingHeight / maxHeight);
List<NodeMapData> nodesList = nodes.ToList<NodeMapData>();
nodesList.Sort(NodeSizeComparer);
foreach (NodeMapData node in nodesList)
{
if (currentY > boundingHeight)
{
currentX += maxColumnWidth + MARGIN.Left + MARGIN.Right;
maxColumnWidth = 0D;
currentY = 0D;
}
maxColumnWidth = Math.Max(node.Dimension.Width, maxColumnWidth);
Point position = new Point(currentX, currentY);
node.Position = position;
currentY += maxHeight;
}
}
/// <summary>
/// Get adjacency graph from input graph
/// </summary>
/// <param name="graph">GraphMapData</param>
/// <returns>AdjacencyGraph</returns>
public static AdjacencyGraph<string, Edge<string>> GetAdjacencyGraph(GraphMapData graph)
{
ICollection<NodeMapData> nodes = graph.GetNodes();
AdjacencyGraph<string, Edge<string>> adjacencyGraph = new AdjacencyGraph<string, Edge<string>>(true, nodes.Count);
foreach (NodeMapData node in nodes)
{
adjacencyGraph.AddVertex(node.Id);
}
foreach (EdgeMapData edge in graph.GetEdges())
{
Edge<string> quickGraphEdge = new Edge<string>(edge.Source, edge.Target);
adjacencyGraph.AddEdge(quickGraphEdge);
}
return adjacencyGraph;
}
/// <summary>
/// Performs the actual layout algorithm.
/// </summary>
/// <param name="graph">The object containing the graph data</param>
/// <param name="rootNode">Root node</param>
protected override void PerformLayout(GraphMapData graph, INode rootNode)
{
NodeMapData nodeToProcess = null;
if (rootNode != null)
{
nodeToProcess = graph.Nodes[rootNode.ID];
}
// Loop over the nodes until they have all been positioned
while (processedNodes.Count != graph.Nodes.Count)
{
// Get the highest rank node that has not already been
// positioned
if (nodeToProcess == null)
{
double maxRanking = double.MinValue;
// Loop over the nodes looking for the highest ranked one
foreach (NodeMapData node in graph.GetNodes())
{
double currentRanking = GetNodeRanking(graph, node);
if (!processedNodes.Contains(node.Id) && (nodeToProcess == null || maxRanking < currentRanking))
{
maxRanking = currentRanking;
nodeToProcess = node;
}
}
}
// Position the node
SaveNodePosition(nodeToProcess, maxXPosition, 0D);
processedNodes.Add(nodeToProcess.Id);
AddToLayer(nodeToProcess, 0);
// Layer the graph
CalulateSubtreePosition(graph, nodeToProcess, 1);
nodeToProcess = null;
}
// reset for next run
maxXPosition = 0D;
processedNodes.Clear();
layers.Clear();
layerSpans.Clear();
}
private static IDictionary<string, Point> GetOriginalPositions(GraphMapData clusteredGraphMapData)
{
ICollection<NodeMapData> nodes = clusteredGraphMapData.GetNodes();
IDictionary<string, Point> originalPositions = new Dictionary<string, Point>(nodes.Count);
foreach (NodeMapData node in nodes)
{
originalPositions[node.Id] = node.Position;
}
return originalPositions;
}
private static void WriteHeader(XmlWriter writer, GraphMapData graph)
{
writer.WriteStartDocument();
writer.WriteStartElement("graphml", "http://graphml.graphdrawing.org/xmlns");
writer.WriteAttributeString("xmlns", "berico", string.Empty, BERICO_NAMESPACE_URI);
writer.WriteAttributeString("xmlns", "xsi", string.Empty, "http://www.w3.org/2001/XMLSchema-instance");
writer.WriteAttributeString("xsi", "schemaLocation", string.Empty, "http://graphml.graphdrawing.org.xmlns/1.0/graphml.xsd");
if (graph.GetNodes().Count > 0)
{
bool graphHasIconNode = false;
foreach (NodeMapData objNode in graph.GetNodes())
{
if (objNode is IconNodeMapData)
{
graphHasIconNode = true;
break;
}
}
if (graphHasIconNode)
{
WritePropKey(writer, NODE_PROPERTY_PREFIX, "ImageSource", "node");
}
WritePropKey(writer, NODE_PROPERTY_PREFIX, "Description", "node");
WritePropKey(writer, NODE_PROPERTY_PREFIX, "DisplayValue", "node");
WritePropKey(writer, NODE_PROPERTY_PREFIX, "Width", "node");
WritePropKey(writer, NODE_PROPERTY_PREFIX, "Height", "node");
WritePropKey(writer, NODE_PROPERTY_PREFIX, "Position", "node");
WritePropKey(writer, NODE_PROPERTY_PREFIX, "IsHidden", "node");
WritePropKey(writer, NODE_PROPERTY_PREFIX, "BackgroundColor", "node");
WritePropKey(writer, NODE_PROPERTY_PREFIX, "SelectionColor", "node");
}
if (graph.GetEdges().Count > 0)
{
WritePropKey(writer, EDGE_PROPERTY_PREFIX, "DisplayValue", "edge");
WritePropKey(writer, EDGE_PROPERTY_PREFIX, "LabelTextUnderline", "edge");
WritePropKey(writer, EDGE_PROPERTY_PREFIX, "Thickness", "edge");
WritePropKey(writer, EDGE_PROPERTY_PREFIX, "Color", "edge");
WritePropKey(writer, EDGE_PROPERTY_PREFIX, "LabelBackgroundColor", "edge");
WritePropKey(writer, EDGE_PROPERTY_PREFIX, "LabelForegroundColor", "edge");
WritePropKey(writer, EDGE_PROPERTY_PREFIX, "LabelFontStyle", "edge");
WritePropKey(writer, EDGE_PROPERTY_PREFIX, "LabelFontWeight", "edge");
WritePropKey(writer, EDGE_PROPERTY_PREFIX, "LabelFont", "edge");
}
ISet<string> seenAttributes = new HashSet<string>();
foreach (NodeMapData objNode in graph.GetNodes())
{
foreach (KeyValuePair<string, AttributeMapData> kvp in objNode.Attributes)
{
if (seenAttributes.Add(kvp.Key))
{
WriteAttrKey(writer, NODE_ATTRIBUTE_PREFIX, kvp.Value.Name, "node");
}
}
}
seenAttributes.Clear();
foreach (EdgeMapData objEdge in graph.GetEdges())
{
foreach (KeyValuePair<string, AttributeMapData> kvp in objEdge.Attributes)
{
if (seenAttributes.Add(kvp.Key))
{
WriteAttrKey(writer, EDGE_ATTRIBUTE_PREFIX, kvp.Value.Name, "edge");
}
}
}
}
private static void WriteGraphContent(XmlWriter writer, GraphMapData graph)
{
writer.WriteStartElement("graph");
writer.WriteAttributeString("id", "snagl_export_graph");
GraphType edgedefault = GraphType.Undirected;
foreach (EdgeMapData objEdge in graph.GetEdges())
{
if (objEdge.Type == EdgeType.Directed)
{
edgedefault = GraphType.Directed;
break;
}
}
writer.WriteAttributeString("edgedefault", edgedefault.ToString());
NodeTypes defaultNodeType = NodeTypes.Text;
foreach (NodeMapData objNode in graph.GetNodes())
{
if (objNode is IconNodeMapData)
{
defaultNodeType = NodeTypes.Icon;
break;
}
}
writer.WriteAttributeString("berico", "nodeType", BERICO_NAMESPACE_URI, defaultNodeType.ToString());
foreach (NodeMapData objNode in graph.GetNodes())
{
WriteNode(writer, objNode);
}
foreach (EdgeMapData objEdge in graph.GetEdges())
{
WriteEdge(writer, objEdge);
}
writer.WriteEndElement();
}
/// <summary>
/// Get bidirectional graph from input graph
/// </summary>
/// <param name="graph">GraphMapData</param>
/// <returns>BidirectionalGraph</returns>
public static BidirectionalGraph<string, WeightedEdge<string>> GetBidirectionalGraph(GraphMapData graph)
{
ICollection<NodeMapData> nodes = graph.GetNodes();
BidirectionalGraph<string, WeightedEdge<string>> bidirectionalGraph = new BidirectionalGraph<string, WeightedEdge<string>>(true, nodes.Count);
foreach (NodeMapData node in nodes)
{
bidirectionalGraph.AddVertex(node.Id);
}
foreach (EdgeMapData edge in graph.GetEdges())
{
WeightedEdge<string> weightedEdge = new WeightedEdge<string>(edge.Source, edge.Target, edge.Weight);
bidirectionalGraph.AddEdge(weightedEdge);
}
return bidirectionalGraph;
}
/// <summary>
/// Updates the input graph node positions with those from the input mapping
/// </summary>
/// <param name="graph">GraphMapData</param>
/// <param name="vertexPositions">map of node id to vector</param>
public static void SetNodePositions(GraphMapData graph, IDictionary<string, Vector> vertexPositions)
{
ICollection<NodeMapData> nodes = graph.GetNodes();
foreach (NodeMapData node in nodes)
{
Vector vPos = vertexPositions[node.Id];
Point pPos = new Point(vPos.X, vPos.Y);
node.Position = pPos;
}
}
/// <summary>
/// Gets a mapping of node id to size
/// </summary>
/// <param name="graph">GraphMapData</param>
/// <returns>map of node id to size</returns>
public static IDictionary<string, Size> GetNodeSizes(GraphMapData graph)
{
ICollection<NodeMapData> nodes = graph.GetNodes();
IDictionary<string, Size> nodeSizes = new Dictionary<string, Size>(nodes.Count);
foreach (NodeMapData node in nodes)
{
nodeSizes[node.Id] = node.Dimension;
}
return nodeSizes;
}
/// <summary>
/// Gets a mapping of node id to vector
/// </summary>
/// <param name="graph">GraphMapData</param>
/// <returns>map of node id to vector</returns>
public static IDictionary<string, Vector> GetNodePositions(GraphMapData graph)
{
ICollection<NodeMapData> nodes = graph.GetNodes();
IDictionary<string, Vector> nodePositions = new Dictionary<string, Vector>(nodes.Count);
foreach (NodeMapData node in nodes)
{
Vector vPos = new Vector(node.Position.X, node.Position.Y);
nodePositions[node.Id] = vPos;
}
return nodePositions;
}
