/// <summary>
/// Calculates the graph layout
/// </summary>
/// <exception cref="CancelException">Thrown when the layout is canceled.</exception>
#else
/// <summary>
/// Calculates the graph layout
/// </summary>
/// <exception cref="System.OperationCanceledException">Thrown when the layout is canceled.</exception>
#endif
public static void CalculateLayout(GeometryGraph geometryGraph, LayoutAlgorithmSettings settings, CancelToken cancelToken) {
Console.WriteLine("starting CalculateLayout");
if (settings is RankingLayoutSettings) {
var rankingLayoutSettings = settings as RankingLayoutSettings;
var rankingLayout = new RankingLayout(rankingLayoutSettings, geometryGraph);
rankingLayout.Run(cancelToken);
RouteAndLabelEdges(geometryGraph, settings, geometryGraph.Edges);
}
else if (settings is MdsLayoutSettings) {
var mdsLayoutSettings = settings as MdsLayoutSettings;
var mdsLayout = new MdsGraphLayout(mdsLayoutSettings, geometryGraph);
mdsLayout.Run(cancelToken);
if (settings.EdgeRoutingSettings.EdgeRoutingMode != EdgeRoutingMode.None)
RouteAndLabelEdges(geometryGraph, settings, geometryGraph.Edges);
}
else if (settings is FastIncrementalLayoutSettings) {
var incrementalSettings = settings as FastIncrementalLayoutSettings;
incrementalSettings.AvoidOverlaps = true;
var initialLayout = new InitialLayout(geometryGraph, incrementalSettings);
initialLayout.Run(cancelToken);
if (settings.EdgeRoutingSettings.EdgeRoutingMode != EdgeRoutingMode.None)
RouteAndLabelEdges(geometryGraph, settings, geometryGraph.Edges);
//incrementalSettings.IncrementalRun(geometryGraph);
}
else {
var sugiyamaLayoutSettings = settings as SugiyamaLayoutSettings;
if (sugiyamaLayoutSettings != null)
ProcessSugiamaLayout(geometryGraph, sugiyamaLayoutSettings, cancelToken);
else {
Debug.Assert(settings is LgLayoutSettings);
LayoutLargeGraphWithLayers(geometryGraph, settings, cancelToken);
}
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="streamPar">the stream to write the graph into</param>
/// <param name="graphP">the graph</param>
/// <param name="settings">The settings to be written.</param>
public GeometryGraphWriter(Stream streamPar, GeometryGraph graphP, LayoutAlgorithmSettings settings) {
stream = streamPar;
Graph = graphP;
Settings = settings;
var xmlWriterSettings = new XmlWriterSettings {Indent = true};
XmlWriter = XmlWriter.Create(stream, xmlWriterSettings);
EdgeEnumeration = graphP.Edges;
}
internal static void FixBoundingBox(GeometryGraph component, LayoutAlgorithmSettings settings)
{
// Pad the graph with margins so the packing will be spaced out.
component.Margins = settings.ClusterMargin;
component.UpdateBoundingBox();
// Zero the graph
component.Translate(-component.BoundingBox.LeftBottom);
}
/// <summary>
///
/// </summary>
/// <param name="pushingNodes">the nodes are already at the correct positions</param>
/// <param name="graph"></param>
/// <param name="layoutSettings"></param>
public IncrementalDragger(IEnumerable<GeomNode> pushingNodes, GeometryGraph graph, LayoutAlgorithmSettings layoutSettings) {
this.graph = graph;
this.nodeSeparation = layoutSettings.NodeSeparation;
this.layoutSettings = layoutSettings;
pushingNodesArray = pushingNodes as GeomNode[] ?? pushingNodes.ToArray();
Debug.Assert(pushingNodesArray.All(n => DefaultClusterParent(n) == null) ||
(new Set<GeomNode>(pushingNodesArray.Select(n => n.ClusterParents.First()))).Count == 1,
"dragged nodes have to belong to the same cluster");
InitBumperPushers();
}
internal static void RouteEdges(GeometryGraph component, LayoutAlgorithmSettings settings, CancelToken cancelToken)
{
EdgeRoutingMode mode = settings.EdgeRoutingSettings.EdgeRoutingMode;
// Use straight line routing on very large graphs otherwise it is too slow
if (component.Nodes.Count >= 2000)
{
mode = EdgeRoutingMode.StraightLine;
}
switch (mode)
{
case EdgeRoutingMode.Spline:
var splineRouter = new SplineRouter(
component,
settings.EdgeRoutingSettings.Padding,
settings.NodeSeparation, settings.EdgeRoutingSettings.ConeAngle, null);
splineRouter.Run(cancelToken);
break;
case EdgeRoutingMode.SplineBundling:
splineRouter = new SplineRouter(
component,
settings.EdgeRoutingSettings.Padding,
settings.NodeSeparation / 20, settings.EdgeRoutingSettings.ConeAngle,
new BundlingSettings());
splineRouter.Run(cancelToken);
break;
case EdgeRoutingMode.Rectilinear:
double edgePadding = settings.EdgeRoutingSettings.Padding;
double cornerRadius = settings.EdgeRoutingSettings.CornerRadius;
var rectilinearEdgeRouter = new RectilinearEdgeRouter(component, edgePadding, cornerRadius,
true);
rectilinearEdgeRouter.Run(cancelToken);
break;
case EdgeRoutingMode.StraightLine:
var router = new StraightLineEdges(component.Edges,
settings.EdgeRoutingSettings.Padding);
router.Run(cancelToken);
break;
}
}
static void ProcessGraphAttrs(Graph graph, GeometryGraph msaglGraph, LayoutAlgorithmSettings settings) {
msaglGraph.Margins = graph.Attr.Margin;
var ss = settings as SugiyamaLayoutSettings;
if (ss != null) {
switch (graph.Attr.LayerDirection) {
case LayerDirection.None:
case LayerDirection.TB:
break;
case LayerDirection.LR:
ss.Transformation = PlaneTransformation.Rotation(Math.PI/2);
break;
case LayerDirection.RL:
ss.Transformation = PlaneTransformation.Rotation(-Math.PI/2);
break;
case LayerDirection.BT:
ss.Transformation = PlaneTransformation.Rotation(Math.PI);
break;
default:
throw new InvalidOperationException(); //"unexpected layout direction");
}
TransferConstraints(ss, graph);
}
}
public static void Write(GeometryGraph graph, LayoutAlgorithmSettings settings, string fileName) {
if (fileName == null) return;
if (!fileName.EndsWith(FileExtension, StringComparison.InvariantCultureIgnoreCase))
fileName += FileExtension;
using (Stream stream = File.Open(fileName, FileMode.Create)) {
var graphWriter = new GeometryGraphWriter(stream, graph, settings);
graphWriter.Write();
}
}
internal void LayoutComponent(LayoutAlgorithmSettings settings, GeometryGraph component) {
var fdSettings = settings as FastIncrementalLayoutSettings;
var mdsSettings = settings as MdsLayoutSettings;
var layeredSettings = settings as SugiyamaLayoutSettings;
if (fdSettings != null) {
ForceDirectedLayout(fdSettings, component);
}
else if (mdsSettings != null) {
MDSLayout(mdsSettings, component);
}
else if (layeredSettings != null) {
LayeredLayout(layeredSettings, component);
}
else {
throw new NotImplementedException("Unknown type of layout settings!");
}
//LayoutAlgorithmSettings.ShowGraph(component);
}
/// <summary>
/// Recursively lay out the clusters of the given graph using the given settings.
/// </summary>
/// <param name="graph">The graph being operated on.</param>
/// <param name="defaultSettings">Settings to use if none is provided for a particular cluster or its ancestors.</param>
public InitialLayoutByCluster(GeometryGraph graph, LayoutAlgorithmSettings defaultSettings)
: this(graph, anyCluster => defaultSettings) {}
static public void ComputeNodeLabelsOfLargeGraphWithLayers(GeometryGraph geometryGraph, LayoutAlgorithmSettings settings, List<double> noldeLabelRatios, CancelToken cancelToken) {
var largeGraphLayoutSettings = (LgLayoutSettings)settings;
var largeGraphLayout = largeGraphLayoutSettings.Interactor;
largeGraphLayout.InitNodeLabelWidthToHeightRatios(noldeLabelRatios);
largeGraphLayout.LabelingOfOneRun();
}
/// <summary>
/// calculates all data necessery for large graph browsing
/// </summary>
/// <param name="geometryGraph"></param>
/// <param name="settings"></param>
/// <param name="cancelToken"></param>
static public void LayoutLargeGraphWithLayers(GeometryGraph geometryGraph, LayoutAlgorithmSettings settings, CancelToken cancelToken) {
var largeGraphLayoutSettings = (LgLayoutSettings) settings;
var largeGraphLayout = new LgInteractor(geometryGraph, largeGraphLayoutSettings, cancelToken);
largeGraphLayoutSettings.Interactor = largeGraphLayout;
largeGraphLayout.Run();
}
void BindTheGraphs(Graph drawingGraph, GeometryGraph geomGraph, LayoutAlgorithmSettings settings) {
drawingGraph.GeometryGraph = geomGraph;
foreach (Node dn in drawingGraph.NodeMap.Values) {
var geomNode = dn.GeometryNode = geometryGraphReader.FindNodeById(dn.Id);
geomNode.UserData = dn;
}
foreach (var subgraph in drawingGraph.RootSubgraph.AllSubgraphsDepthFirst()) {
var geomNode = subgraph.GeometryNode = geometryGraphReader.FindClusterById(subgraph.Id);
if (geomNode != null)
geomNode.UserData = subgraph;
}
// geom edges have to appear in the same order as drawing edges
for(int i = 0;i < EdgeList.Count;i++) {
var drawingEdge = EdgeList[i];
var geomEdge = geometryGraphReader.EdgeList[i];
drawingEdge.GeometryEdge = geomEdge;
geomEdge.UserData = drawingEdge;
if(drawingEdge.Label != null) {
drawingEdge.Label.GeometryLabel = geomEdge.Label;
geomEdge.Label.UserData = drawingEdge.Label;
}
}
drawingGraph.LayoutAlgorithmSettings = settings;
}
/// <summary>
/// </summary>
/// <param name="geometryGraph"></param>
/// <param name="layoutSettings"></param>
/// <param name="edgesToRoute"></param>
public static void RouteAndLabelEdges(GeometryGraph geometryGraph, LayoutAlgorithmSettings layoutSettings, IEnumerable<Edge> edgesToRoute) {
//todo: what about parent edges!!!!
var filteredEdgesToRoute =
edgesToRoute.Where(e => ! e.UnderCollapsedCluster()).ToArray();
var ers = layoutSettings.EdgeRoutingSettings;
if (ers.EdgeRoutingMode == EdgeRoutingMode.Rectilinear ||
ers.EdgeRoutingMode == EdgeRoutingMode.RectilinearToCenter) {
RectilinearInteractiveEditor.CreatePortsAndRouteEdges(
layoutSettings.NodeSeparation/3,
layoutSettings.NodeSeparation/3,
geometryGraph.Nodes,
edgesToRoute,
ers.EdgeRoutingMode,
true,
ers.UseObstacleRectangles,
ers.BendPenalty);
} else if (ers.EdgeRoutingMode == EdgeRoutingMode.Spline || ers.EdgeRoutingMode==EdgeRoutingMode.SugiyamaSplines) {
new SplineRouter(geometryGraph, filteredEdgesToRoute, ers.Padding, ers.PolylinePadding, ers.ConeAngle, null)
{
ContinueOnOverlaps = true, KeepOriginalSpline = ers.KeepOriginalSpline
}.Run();
} else if (ers.EdgeRoutingMode == EdgeRoutingMode.SplineBundling) {
var edgeBundlingSettings = ers.BundlingSettings ?? new BundlingSettings();
var bundleRouter = new SplineRouter(geometryGraph, filteredEdgesToRoute, ers.Padding, ers.PolylinePadding, ers.ConeAngle,
edgeBundlingSettings) {
KeepOriginalSpline = ers.KeepOriginalSpline
};
bundleRouter.Run();
if (bundleRouter.OverlapsDetected)
{
new SplineRouter(geometryGraph, filteredEdgesToRoute, ers.Padding, ers.PolylinePadding, ers.ConeAngle, null)
{
ContinueOnOverlaps = true,
KeepOriginalSpline = ers.KeepOriginalSpline
}.Run();
}
} else if (ers.EdgeRoutingMode == EdgeRoutingMode.StraightLine) {
var router = new StraightLineEdges(filteredEdgesToRoute, ers.Padding);
router.Run();
}
var elb = new EdgeLabelPlacement(geometryGraph.Nodes, filteredEdgesToRoute);
elb.Run();
geometryGraph.UpdateBoundingBox();
}
static GeometryGraph GetTestGraphWithClusters(out LayoutAlgorithmSettings settings) {
GeometryGraph graph =
GeometryGraphReader.CreateFromFile(
"C:\\dev\\GraphLayout\\MSAGLTests\\Resources\\MSAGLGeometryGraphs\\abstract.msagl.geom",
//"E:\\dev\\MSAGL\\GraphLayout\\MSAGLTests\\Resources\\MSAGLGeometryGraphs\\abstract.msagl.geom",
out settings);
foreach (var edge in graph.Edges) {
edge.Curve = null;
edge.EdgeGeometry.TargetArrowhead = null;
}
graph.UpdateBoundingBox();
var root = graph.RootCluster;
var a = new Cluster {UserData = "a"};
foreach (string id in new[] {"17", "39", "13", "19", "28", "12"})
a.AddChild(graph.FindNodeByUserData(id));
var b = new Cluster {UserData = "b"};
b.AddChild(a);
b.AddChild(graph.FindNodeByUserData("18"));
root.AddChild(b);
var c = new Cluster {UserData = "c"};
foreach (string id in new[] {"30", "5", "6", "7", "8"})
c.AddChild(graph.FindNodeByUserData(id));
root.AddChild(c);
var clusterNodes = new Set<Node>(root.AllClustersDepthFirst().SelectMany(cl => cl.Nodes));
foreach (var node in graph.Nodes.Where(n => clusterNodes.Contains(n) == false))
root.AddChild(node);
FixClusterBoundariesWithNoRectBoundaries(root, 5);
var fastIncrementalLayoutSettings = new FastIncrementalLayoutSettings();
var d=new Dictionary<Cluster, LayoutAlgorithmSettings>();
d[root] = new FastIncrementalLayoutSettings { AvoidOverlaps = true };
var initialLayout = new InitialLayoutByCluster(graph, fastIncrementalLayoutSettings);
initialLayout.Run();
graph.UpdateBoundingBox();
//FixClusterBoundariesWithNoRectBoundaries(root, 5);
return graph;
}
void ReadGraph() {
MoveToContent();
_graph.Margins = GetDoubleAttributeOrDefault(GeometryToken.Margins, 10);
if (XmlReader.Name.ToLower() != GeometryToken.Graph.ToString().ToLower())
Error("expecting element \"graph\"");
bool done = false;
do {
switch (GetElementTag()) {
case GeometryToken.Nodes:
ReadNodes();
break;
case GeometryToken.Edges:
ReadEdges();
break;
case GeometryToken.Clusters:
ReadClusters();
break;
case GeometryToken.LayoutAlgorithmSettings:
Settings = ReadLayoutAlgorithmSettings(XmlReader); //todo . not tested
break;
case GeometryToken.LgLevels:
ReadLgLevels();
break;
case GeometryToken.LgSkeletonLevels:
ReadLgSkeletonLevels();
break;
case GeometryToken.End:
case GeometryToken.Graph:
if (XmlReader.NodeType == XmlNodeType.EndElement) {
done = true;
ReadEndElement();
break;
}
XmlRead();
break;
default: //ignore this element
XmlReader.Skip();
break;
// XmlReader.Skip();
// ReadHeader();
// if (TokenIs(GeometryToken.LayoutAlgorithmSettings))
// this.Settings = ReadLayoutAlgorithmSettings(XmlReader);
// ReadNodes();
// ReadClusters();
// ReadEdges();
}
} while (!done);
_graph.BoundingBox = _graph.PumpTheBoxToTheGraphWithMargins();
}
public static GeometryGraph CreateFromFile(string fileName, out LayoutAlgorithmSettings settings) {
#if DEBUG && TEST_MSAGL
if (FirstCharacter(fileName) != '<') {
settings = null;
return null;
}
#endif
using (Stream stream = File.OpenRead(fileName)) {
var graphReader = new GeometryGraphReader(stream);
GeometryGraph graph = graphReader.Read();
settings = graphReader.Settings;
return graph;
}
}
/// <summary>
/// Pack the given graph components to the specified aspect ratio
/// </summary>
/// <param name="components">set of graphs to pack</param>
/// <param name="settings">settings for packing method and desired aspect ratio</param>
/// <returns>Bounding box of the packed components</returns>
public static Rectangle PackGraphs(IEnumerable<GeometryGraph> components, LayoutAlgorithmSettings settings) {
List<RectangleToPack<GeometryGraph>> rectangles =
(from c in components select new RectangleToPack<GeometryGraph>(c.BoundingBox, c)).ToList();
if (rectangles.Count > 1) {
OptimalPacking<GeometryGraph> packing = settings.PackingMethod == PackingMethod.Compact
? new OptimalRectanglePacking<GeometryGraph>(rectangles, settings.PackingAspectRatio)
: (OptimalPacking<GeometryGraph>)
new OptimalColumnPacking<GeometryGraph>(rectangles, settings.PackingAspectRatio);
packing.Run();
foreach (var r in rectangles) {
GeometryGraph component = r.Data;
var delta = r.Rectangle.LeftBottom - component.boundingBox.LeftBottom;
component.Translate(delta);
}
return new Rectangle(0, 0, packing.PackedWidth, packing.PackedHeight);
}
if (rectangles.Count == 1)
return rectangles[0].Rectangle;
return Rectangle.CreateAnEmptyBox();
}
