public static void Main()
{
DefaultLayoutGraph graph = new DefaultLayoutGraph();
//construct graph. assign sizes to nodes
Node v1 = graph.CreateNode();
graph.SetSize(v1, 30, 30);
Node v2 = graph.CreateNode();
graph.SetSize(v2, 30, 30);
Node v3 = graph.CreateNode();
graph.SetSize(v3, 30, 30);
// add a label to one node
var nodeLabelLayoutModel = new DiscreteNodeLabelLayoutModel(DiscreteNodeLabelPositions.InternalMask, 4);
var labelLayoutFactory = LayoutGraphUtilities.GetLabelFactory(graph);
labelLayoutFactory.AddLabelLayout(v1, labelLayoutFactory.CreateLabelLayout(v1,
new YOrientedRectangle(0, 0, 80, 20), nodeLabelLayoutModel));
Edge e1 = graph.CreateEdge(v1, v2);
Edge e2 = graph.CreateEdge(v1, v3);
// add a label to an edge
var edgeLabelLayoutModel = new SliderEdgeLabelLayoutModel(SliderMode.Side);
labelLayoutFactory.AddLabelLayout(e1, labelLayoutFactory.CreateLabelLayout(e1,
new YOrientedRectangle(0, 0, 80, 20), edgeLabelLayoutModel,
PreferredPlacementDescriptor.NewSharedInstance(LabelPlacements.LeftOfEdge)));
//optionally setup some port constraints for HierarchicLayout
IEdgeMap spc = graph.CreateEdgeMap();
IEdgeMap tpc = graph.CreateEdgeMap();
//e1 shall leave and enter the node on the right side
spc.Set(e1, PortConstraint.Create(PortSide.East, false));
//additionally set a strong port constraint on the target side.
tpc.Set(e1, PortConstraint.Create(PortSide.East, true));
//ports with strong port constraints will not be reset by the
//layout algorithm. So we specify the target port right now to connect
//to the upper left corner of the node
graph.SetTargetPointRel(e1, new YPoint(15, -15));
//e2 shall leave and enter the node on the top side
spc.Set(e2, PortConstraint.Create(PortSide.North, false));
tpc.Set(e2, PortConstraint.Create(PortSide.North, false));
graph.AddDataProvider(PortConstraintKeys.SourcePortConstraintDpKey, spc);
graph.AddDataProvider(PortConstraintKeys.TargetPortConstraintDpKey, tpc);
HierarchicLayout layout = new HierarchicLayout();
layout.IntegratedEdgeLabeling = true;
layout.ConsiderNodeLabels = true;
layout.LayoutMode = LayoutMode.FromScratch;
new BufferedLayout(layout).ApplyLayout(graph);
Console.WriteLine("\n\nGRAPH LAID OUT HIERARCHICALLY FROM SCRATCH");
Console.WriteLine("v1 center position = " + graph.GetCenter(v1));
Console.WriteLine("v2 center position = " + graph.GetCenter(v2));
Console.WriteLine("v3 center position = " + graph.GetCenter(v3));
Console.WriteLine("e1 path = " + graph.GetPath(e1));
Console.WriteLine("e2 path = " + graph.GetPath(e2));
//display the graph in a simple viewer
GraphViewer gv = new GraphViewer();
gv.AddLayoutGraph(new CopiedLayoutGraph(graph), "Before Addition");
// now add a node and two edges incrementally...
Node v4 = graph.CreateNode();
graph.SetSize(v4, 30, 30);
Edge e4 = graph.CreateEdge(v4, v2);
Edge e3 = graph.CreateEdge(v1, v4);
//mark elements as newly added so that the layout algorithm can place
//them nicely.
IIncrementalHintsFactory ihf = layout.CreateIncrementalHintsFactory();
IDataMap map = Maps.CreateHashedDataMap();
map.Set(v4, ihf.CreateLayerIncrementallyHint(v4));
map.Set(e3, ihf.CreateSequenceIncrementallyHint(e3));
map.Set(e4, ihf.CreateSequenceIncrementallyHint(e4));
graph.AddDataProvider(HierarchicLayout.IncrementalHintsDpKey, map);
layout.LayoutMode = LayoutMode.Incremental;
new BufferedLayout(layout).ApplyLayout(graph);
Console.WriteLine("\n\nGRAPH AFTER ELEMENTS HAVE BEEN ADDED INCREMENTALLY");
Console.WriteLine("v1 center position = " + graph.GetCenter(v1));
Console.WriteLine("v2 center position = " + graph.GetCenter(v2));
Console.WriteLine("v3 center position = " + graph.GetCenter(v3));
Console.WriteLine("v4 center position = " + graph.GetCenter(v4));
Console.WriteLine("e1 path = " + graph.GetPath(e1));
Console.WriteLine("e2 path = " + graph.GetPath(e2));
Console.WriteLine("e3 path = " + graph.GetPath(e3));
Console.WriteLine("e4 path = " + graph.GetPath(e4));
//clean up data maps
graph.RemoveDataProvider(HierarchicLayout.IncrementalHintsDpKey);
//display the graph in a simple viewer
gv.AddLayoutGraph(new CopiedLayoutGraph(graph), "After Addition");
Application.Run(gv);
}
///<inheritdoc/>
protected override void ConfigureLayout()
{
LayoutGraph graph = CurrentLayoutGraph;
HierarchicLayout hl = new HierarchicLayout();
LayoutAlgorithm = hl;
// mark incremental elements if required
IDataMap incrementalElements;
OptionGroup generalGroup = (OptionGroup)Handler.GetGroupByName(GENERAL);
OptionGroup currentGroup = (OptionGroup)generalGroup.GetGroupByName(INTERACTION);
OptionGroup groupingGroup = (OptionGroup)Handler.GetGroupByName(GROUPING);
bool fromSketch = (bool)currentGroup[USE_DRAWING_AS_SKETCH].Value;
bool incrementalLayout = (bool)currentGroup[SELECTED_ELEMENTS_INCREMENTALLY].Value;
bool selectedElements = !IsEdgeSelectionEmpty() || !IsNodeSelectionEmpty();
if (incrementalLayout && selectedElements)
{
// create storage for both nodes and edges
incrementalElements = Maps.CreateHashedDataMap();
// configure the mode
hl.LayoutMode = LayoutMode.Incremental;
IIncrementalHintsFactory ihf = hl.CreateIncrementalHintsFactory();
foreach (Node node in graph.Nodes)
{
if (IsSelected(node))
{
incrementalElements.Set(node, ihf.CreateLayerIncrementallyHint(node));
}
}
foreach (Edge edge in graph.Edges)
{
if (IsSelected(edge))
{
incrementalElements.Set(edge, ihf.CreateSequenceIncrementallyHint(edge));
}
}
graph.AddDataProvider(HierarchicLayout.IncrementalHintsDpKey, incrementalElements);
}
else if (fromSketch)
{
hl.LayoutMode = LayoutMode.Incremental;
}
else
{
hl.LayoutMode = LayoutMode.FromScratch;
}
// cast to implementation simplex
var np = (SimplexNodePlacer)hl.NodePlacer;
np.BarycenterMode = (bool)generalGroup[SYMMETRIC_PLACEMENT].Value;
np.StraightenEdges = (bool)Handler.GetValue(EDGE_SETTINGS, EDGE_STRAIGHTENING_OPTIMIZATION_ENABLED);
hl.ComponentLayoutEnabled = (bool)generalGroup[LAYOUT_COMPONENTS_SEPARATELY].Value;
currentGroup = (OptionGroup)generalGroup.GetGroupByName(MINIMUM_DISTANCES);
hl.MinimumLayerDistance = (double)currentGroup[MINIMUM_LAYER_DISTANCE].Value;
hl.NodeToEdgeDistance = (double)currentGroup[NODE_TO_EDGE_DISTANCE].Value;
hl.NodeToNodeDistance = (double)currentGroup[NODE_TO_NODE_DISTANCE].Value;
hl.EdgeToEdgeDistance = (double)currentGroup[EDGE_TO_EDGE_DISTANCE].Value;
NodeLayoutDescriptor nld = hl.NodeLayoutDescriptor;
EdgeLayoutDescriptor eld = hl.EdgeLayoutDescriptor;
currentGroup = (OptionGroup)Handler.GetGroupByName(EDGE_SETTINGS);
hl.AutomaticEdgeGrouping = (bool)currentGroup[AUTOMATIC_EDGE_GROUPING_ENABLED].Value;
string edgeRoutingChoice = (string)currentGroup[EDGE_ROUTING].Value;
eld.RoutingStyle = edgeRoutingEnum[edgeRoutingChoice];
eld.MinimumFirstSegmentLength = (double)currentGroup[MINIMUM_FIRST_SEGMENT_LENGTH].Value;
eld.MinimumLastSegmentLength = (double)currentGroup[MINIMUM_LAST_SEGMENT_LENGTH].Value;
eld.MinimumDistance = (double)currentGroup[MINIMUM_EDGE_DISTANCE].Value;
eld.MinimumLength = (double)currentGroup[MINIMUM_EDGE_LENGTH].Value;
eld.MinimumSlope = (double)currentGroup[MINIMUM_SLOPE].Value;
eld.SourcePortOptimization = (bool)currentGroup[PC_OPTIMIZATION_ENABLED].Value;
eld.TargetPortOptimization = (bool)currentGroup[PC_OPTIMIZATION_ENABLED].Value;
var isIncrementalModeEnabled = (fromSketch || (incrementalLayout && selectedElements));
var recursiveRoutingMode = Handler.GetValue(EDGE_SETTINGS, RECURSIVE_EDGE_ROUTING);
if (!isIncrementalModeEnabled && recursiveRoutingMode == RECURSIVE_EDGE_ROUTING_DIRECTED)
{
eld.RecursiveEdgeStyle = RecursiveEdgeStyle.Directed;
}
else if (!isIncrementalModeEnabled && recursiveRoutingMode == RECURSIVE_EDGE_ROUTING_UNDIRECTED)
{
eld.RecursiveEdgeStyle = RecursiveEdgeStyle.Undirected;
}
else
{
eld.RecursiveEdgeStyle = RecursiveEdgeStyle.Off;
}
nld.MinimumDistance = Math.Min(hl.NodeToNodeDistance, hl.NodeToEdgeDistance);
nld.MinimumLayerHeight = 0;
OptionGroup rankGroup = (OptionGroup)Handler.GetGroupByName(RANKS);
string layerAlignmentChoice = (string)rankGroup[LAYER_ALIGNMENT].Value;
nld.LayerAlignment = alignmentEnum[layerAlignmentChoice];
ol = (OrientationLayout)hl.OrientationLayout;
string orientationChoice = (string)generalGroup[ORIENTATION].Value;
ol.Orientation = orientEnum[orientationChoice];
OptionGroup labelingGroup = (OptionGroup)Handler.GetGroupByName(LABELING);
currentGroup = (OptionGroup)labelingGroup.GetGroupByName(LABELING_EDGE_PROPERTIES);
string el = (string)currentGroup[EDGE_LABELING].Value;
if (!el.Equals(EDGE_LABELING_NONE))
{
if (el.Equals(EDGE_LABELING_GENERIC))
{
var la = new GenericLabeling();
la.MaximumDuration = 0;
la.PlaceNodeLabels = false;
la.PlaceEdgeLabels = true;
la.AutoFlipping = true;
la.ProfitModel = new SimpleProfitModel();
hl.PrependStage(la);
}
else if (el.Equals(EDGE_LABELING_HIERARCHIC))
{
bool copactEdgeLabelPlacement = (bool)currentGroup[COMPACT_EDGE_LABEL_PLACEMENT].Value;
if (hl.NodePlacer is SimplexNodePlacer)
{
np.LabelCompaction = copactEdgeLabelPlacement;
}
hl.IntegratedEdgeLabeling = true;
}
}
else
{
hl.IntegratedEdgeLabeling = false;
}
currentGroup = (OptionGroup)labelingGroup.GetGroupByName(NODE_PROPERTIES);
if ((bool)currentGroup[CONSIDER_NODE_LABELS].Value)
{
hl.ConsiderNodeLabels = true;
hl.NodeLayoutDescriptor.NodeLabelMode = NodeLabelMode.ConsiderForDrawing;
}
else
{
hl.ConsiderNodeLabels = false;
}
string rp = (string)rankGroup[RANKING_POLICY].Value;
hl.FromScratchLayeringStrategy = rankingPolicies[rp];
if (rp.Equals(BFS_LAYERS))
{
CurrentLayoutGraph.AddDataProvider(BFSLayerer.CoreNodesDpKey, new SelectedNodesDP(this));
}
hl.ComponentArrangementPolicy = componentAlignmentEnum[(string)rankGroup[COMPONENT_ARRANGEMENT_POLICY].Value];
//configure AsIsLayerer
Object layerer = (hl.LayoutMode == LayoutMode.FromScratch)
? hl.FromScratchLayerer
: hl.FixedElementsLayerer;
// if (layerer is OldLayererWrapper) {
// layerer = ((OldLayererWrapper)layerer).OldLayerer;
// }
if (layerer is AsIsLayerer)
{
AsIsLayerer ail = (AsIsLayerer)layerer;
currentGroup = (OptionGroup)rankGroup.GetGroupByName(FROM_SKETCH_PROPERTIES);
ail.NodeHalo = (double)currentGroup[HALO].Value;
ail.NodeScalingFactor = (double)currentGroup[SCALE].Value;
ail.MinimumNodeSize = (double)currentGroup[MINIMUM_SIZE].Value;
ail.MaximumNodeSize = (double)currentGroup[MAXIMUM_SIZE].Value;
}
//configure grouping
np.GroupCompactionStrategy = groupHorizCompactionEnum[(string)groupingGroup[GROUP_HORIZONTAL_COMPACTION].Value];
if (!fromSketch && groupStrategyEnum[(string)groupingGroup[GROUP_LAYERING_STRATEGY].Value])
{
GroupAlignmentPolicy alignmentPolicy = groupAlignmentEnum[(string)groupingGroup[GROUP_ALIGNMENT].Value];
hl.GroupAlignmentPolicy = alignmentPolicy;
hl.CompactGroups = (bool)groupingGroup[GROUP_ENABLE_COMPACTION].Value;
hl.RecursiveGroupLayering = true;
}
else
{
hl.RecursiveGroupLayering = false;
}
OptionGroup swimGroup = (OptionGroup)Handler.GetGroupByName(SWIMLANES);
if ((bool)swimGroup[TREAT_ROOT_GROUPS_AS_SWIMLANES].Value)
{
TopLevelGroupToSwimlaneStage stage = new TopLevelGroupToSwimlaneStage();
stage.OrderSwimlanesFromSketch = (bool)swimGroup[USE_ORDER_FROM_SKETCH].Value;
stage.Spacing = (double)swimGroup[SWIMLANE_SPACING].Value;
hl.AppendStage(stage);
}
hl.BackLoopRouting = (bool)Handler.GetValue(EDGE_SETTINGS, BACKLOOP_ROUTING);
hl.MaximumDuration = ((int)Handler.GetValue(GENERAL, MAXIMUM_DURATION)) * 1000;
bool gridEnabled = (bool)Handler.GetValue(GRID, GRID_ENABLED);
if (gridEnabled)
{
hl.GridSpacing = (double)Handler.GetValue(GRID, GRID_SPACING);
String portAssignment = (string)Handler.GetValue(GRID, GRID_PORT_ASSIGNMENT);
PortAssignmentMode gridPortAssignment;
switch (portAssignment)
{
case GRID_PORT_ASSIGNMENT_ON_GRID:
gridPortAssignment = PortAssignmentMode.OnGrid;
break;
case GRID_PORT_ASSIGNMENT_ON_SUBGRID:
gridPortAssignment = PortAssignmentMode.OnSubgrid;
break;
default:
gridPortAssignment = PortAssignmentMode.Default;
break;
}
graph.AddDataProvider(HierarchicLayoutCore.NodeLayoutDescriptorDpKey,
new NodeLayoutDescriptorAdapter(hl.NodeLayoutDescriptor, graph, gridPortAssignment));
}
}