IGraph (yFiles-for-JavaFX-Complete-3.0 API)

All Superinterfaces:

ILookup, ITagOwner

All Known Implementing Classes:

AbstractGraphWrapper, DefaultGraph, FilteredGraphWrapper
```
public interface IGraph
extends ILookup, ITagOwner
```
Central interface that models a graph which can be displayed in a canvas or GraphControl.
This interface can be used to query structural information, it also offers methods that change the structure of the graph and its attributes. A number of events will trigger appropriate events if the structure of the graph changes.

The graph is made up of collections of nodes and edges. Each node and edge can be associated with a number of labels and possibly ports to which edges connect. An edge connects to two ports and may consist of zero or more bends. The graph is treated as a directed graph, i.e. edges have a source port and a target port. It is up to the algorithms and the visualization to possibly treat them as undirected.

This interface also provides support for hierarchically organized, i.e. grouped graphs. This means that nodes together with their connecting edges can be put into other nodes. The containing node is referred to as a "group node." To create and edit group nodes interactively use the GraphEditorInputMode as input mode and enable the grouping operations.

The edgesAt(IPort, AdjacencyTypes) and edgesAt(IPortOwner, AdjacencyTypes) methods can be used to query adjacency information from the graph's structure.

Each element in the graph can be associated with a style that is used for the visualization of the element. Styles can be shared between multiple instances.

To associate data with the elements in the graph, code can make use of the Tag property that all IModelItems provide. In order to associate more than one data element with the graph items, compound data objects can be used. Alternatively the IMapperRegistry that can be obtained from the MapperRegistry property can be used to associate arbitrary data sets with the items in this graph.

This interface contains core methods that may use complicated argument lists. GraphExtensions is a static utility class that contains extension methods for this interface that improve the usability of this interface dramatically.

This interface provides a number of events that can be used to get notified for changes in the graph structure. These events are raised whenever the corresponding state change occurs, e.g. also when loading the graph from a file. If you are only interested in changes that are triggered interactively, you should subscribe to the corresponding events on the IInputMode implementations that implement the user interaction. Especially, you may not modify the graph structure in handlers for these event, e.g. try to prevent or undo the change that has raised the event.

The graph model with all relevant types and their relationships is presented in detail in the section The Graph Model.

More information on visual styles can be found in the section Visualization of Graph Elements.

See Also:

DefaultGraph, INode, IEdge, IPort, ILabel, IBend, GraphExtensions, IMapperRegistry

Field Summary
- Fields inherited from interface com.yworks.yfiles.graph.ILookup
  EMPTY

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`default IBend`	`addBend(IEdge edge, PointD location)` Adds a bend at the given index to the given edge using the coordinates provided.
`IBend`	`addBend(IEdge edge, PointD location, int index)` Adds a bend at the given index to the given edge using the coordinates provided.
`void`	`addBendAddedListener(IEventHandler<ItemEventArgs<IBend>> bendAddedEvent)` Adds the given listener for the `BendAdded` event that occurs when a bend has been added to an edge in this graph.
`void`	`addBendLocationChangedListener(IBendLocationChangedHandler bendLocationChangedEvent)` Adds the given listener for the `BendLocationChanged` event that occurs when the location of a bend has been changed.
`void`	`addBendRemovedListener(IEventHandler<BendEventArgs> bendRemovedEvent)` Adds the given listener for the `BendRemoved` event that occurs when a bend has been removed from an edge in this graph.
`default void`	`addBends(IEdge edge, Iterable<PointD> locations)` Adds bends with the given locations to the end of the bend list of the given edge.
`void`	`addBendTagChangedListener(IEventHandler<ItemChangedEventArgs<IBend,Object>> bendTagChangedEvent)` Adds the given listener for the `BendTagChanged` event that occurs when the `tag` of a bend has been replaced.
`void`	`addDisplaysInvalidatedListener(IEventHandler<IEventArgs> displaysInvalidatedEvent)` Adds the given listener for the `DisplaysInvalidated` event that occurs when the graph has changed visually and the display should be updated to reflect the changes.
`void`	`addEdgeCreatedListener(IEventHandler<ItemEventArgs<IEdge>> edgeCreatedEvent)` Adds the given listener for the `EdgeCreated` event that occurs when an edge has been created.
`void`	`addEdgePortsChangedListener(IEventHandler<EdgeEventArgs> edgePortsChangedEvent)` Adds the given listener for the `EdgePortsChanged` event that occurs when an edge had its `SourcePort` or `TargetPort` `changed`.
`void`	`addEdgeRemovedListener(IEventHandler<EdgeEventArgs> edgeRemovedEvent)` Adds the given listener for the `EdgeRemoved` event that occurs when an edge has been removed.
`void`	`addEdgeStyleChangedListener(IEventHandler<ItemChangedEventArgs<IEdge,IEdgeStyle>> edgeStyleChangedEvent)` Adds the given listener for the `EdgeStyleChanged` event that occurs when an edge style has been replaced.
`void`	`addEdgeTagChangedListener(IEventHandler<ItemChangedEventArgs<IEdge,Object>> edgeTagChangedEvent)` Adds the given listener for the `EdgeTagChanged` event that occurs when the `tag` of an edge has been replaced.
`void`	`addGraphTagChangedListener(IEventHandler<ItemChangedEventArgs<IGraph,Object>> graphTagChangedEvent)` Adds the given listener for the `GraphTagChanged` event that occurs when the `tag` of the graph has been replaced.
`void`	`addIsGroupNodeChangedListener(IEventHandler<NodeEventArgs> isGroupNodeChangedEvent)` Adds the given listener for the `IsGroupNodeChanged` event.
`default ILabel`	`addLabel(ILabelOwner owner, String text)` Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
`default ILabel`	`addLabel(ILabelOwner owner, String text, ILabelModelParameter layoutParameter)` Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
`default ILabel`	`addLabel(ILabelOwner owner, String text, ILabelModelParameter layoutParameter, ILabelStyle style)` Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
`default ILabel`	`addLabel(ILabelOwner owner, String text, ILabelModelParameter layoutParameter, ILabelStyle style, SizeD preferredSize)` Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
`ILabel`	`addLabel(ILabelOwner owner, String text, ILabelModelParameter layoutParameter, ILabelStyle style, SizeD preferredSize, Object tag)` Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
`void`	`addLabelAddedListener(IEventHandler<ItemEventArgs<ILabel>> labelAddedEvent)` Adds the given listener for the `LabelAdded` event that occurs when a label has been added to this graph instance.
`void`	`addLabelLayoutParameterChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,ILabelModelParameter>> labelLayoutParameterChangedEvent)` Adds the given listener for the `LabelLayoutParameterChanged` event that occurs when the model parameter of a label has been changed.
`void`	`addLabelPreferredSizeChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,SizeD>> labelPreferredSizeChangedEvent)` Adds the given listener for the `LabelPreferredSizeChanged` event that occurs when the preferred size of a label has been changed.
`void`	`addLabelRemovedListener(IEventHandler<LabelEventArgs> labelRemovedEvent)` Adds the given listener for the `LabelRemoved` event that occurs when a label has been removed from this graph instance.
`void`	`addLabelStyleChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,ILabelStyle>> labelStyleChangedEvent)` Adds the given listener for the `LabelStyleChanged` event that occurs when a label style has been replaced.
`void`	`addLabelTagChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,Object>> labelTagChangedEvent)` Adds the given listener for the `LabelTagChanged` event that occurs when the `tag` of a label has been replaced.
`void`	`addLabelTextChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,String>> labelTextChangedEvent)` Adds the given listener for the `LabelTextChanged` event that occurs when the text of a label has been changed.
`void`	`addNodeCreatedListener(IEventHandler<ItemEventArgs<INode>> nodeCreatedEvent)` Adds the given listener for the `NodeCreated` event that occurs when a node has been created.
`void`	`addNodeLayoutChangedListener(INodeLayoutChangedHandler nodeLayoutChangedEvent)` Adds the given listener for the `NodeLayoutChanged` event that occurs when a node layout has been changed.
`void`	`addNodeRemovedListener(IEventHandler<NodeEventArgs> nodeRemovedEvent)` Adds the given listener for the `NodeRemoved` event that occurs when a node has been removed.
`void`	`addNodeStyleChangedListener(IEventHandler<ItemChangedEventArgs<INode,INodeStyle>> nodeStyleChangedEvent)` Adds the given listener for the `NodeStyleChanged` event that occurs when a node style has been replaced.
`void`	`addNodeTagChangedListener(IEventHandler<ItemChangedEventArgs<INode,Object>> nodeTagChangedEvent)` Adds the given listener for the `NodeTagChanged` event that occurs when the `tag` of a node has been replaced.
`void`	`addParentChangedListener(IEventHandler<NodeEventArgs> parentChangedEvent)` Adds the given listener for the `ParentChanged` event.
`default IPort`	`addPort(IPortOwner owner)` Add a port to the given port owner using the location model parameter, style and tag.
`default IPort`	`addPort(IPortOwner owner, IPortLocationModelParameter locationParameter)` Add a port to the given port owner using the location model parameter, style and tag.
`default IPort`	`addPort(IPortOwner owner, IPortLocationModelParameter locationParameter, IPortStyle style)` Add a port to the given port owner using the location model parameter, style and tag.
`IPort`	`addPort(IPortOwner owner, IPortLocationModelParameter locationParameter, IPortStyle style, Object tag)` Add a port to the given port owner using the location model parameter, style and tag.
`default IPort`	`addPort(IPortOwner owner, PointD location)` Add a port to the given port owner using the absolute coordinates as the new initial position of the port anchor.
`default IPort`	`addPort(IPortOwner owner, PointD location, IPortStyle style)` Add a port to the given port owner using the absolute coordinates as the new initial position of the port anchor.
`default IPort`	`addPort(IPortOwner owner, PointD location, IPortStyle style, Object tag)` Add a port to the given port owner using the absolute coordinates as the new initial position of the port anchor.
`void`	`addPortAddedListener(IEventHandler<ItemEventArgs<IPort>> portAddedEvent)` Adds the given listener for the `PortAdded` event that occurs when a port has been added to this graph instance.
`void`	`addPortLocationParameterChangedListener(IEventHandler<ItemChangedEventArgs<IPort,IPortLocationModelParameter>> portLocationParameterChangedEvent)` Adds the given listener for the `PortLocationParameterChanged` event that occurs when the location model parameter of a port has been changed.
`void`	`addPortRemovedListener(IEventHandler<PortEventArgs> portRemovedEvent)` Adds the given listener for the `PortRemoved` event that occurs when a port has been removed from its `owner`.
`void`	`addPortStyleChangedListener(IEventHandler<ItemChangedEventArgs<IPort,IPortStyle>> portStyleChangedEvent)` Adds the given listener for the `PortStyleChanged` event that occurs when a port style has been replaced.
`void`	`addPortTagChangedListener(IEventHandler<ItemChangedEventArgs<IPort,Object>> portTagChangedEvent)` Adds the given listener for the `PortTagChanged` event that occurs when the `tag` of a port has been replaced.
`default IPort`	`addRelativePort(INode node, PointD relativeLocation)` Adds a new port to the graph at the node using a location that is relative to the center of the node.
`default void`	`addUndoUnit(String undoName, String redoName, Runnable undo, Runnable redo)` Convenience method that uses the `UndoEngine` from the `IGraph`'s `ILookup` to `add a unit`.
`default void`	`adjustGroupNodeLayout(INode groupNode)` Method to adjust the size of a group node.
`default void`	`adjustLabelPreferredSize(ILabel label)` Adjusts the `PreferredSize` property of a label to fit the suggested size of its `ILabelStyleRenderer`.
`default void`	`applyLayout(ILayoutAlgorithm layout)` Convenience method that runs a layout on a graph using `LayoutGraphAdapter.applyLayout(IGraph, ILayoutAlgorithm, LayoutData)`.
`default void`	`applyLayout(ILayoutAlgorithm layout, LayoutData layoutData)` Convenience method that runs a layout on a graph using `LayoutGraphAdapter.applyLayout(IGraph, ILayoutAlgorithm, LayoutData)`.
`default ICompoundEdit`	`beginEdit(String undoName, String redoName)` Starts an `ICompoundEdit` that records graph changes and `custom undo units` in a single compound unit.
`default <T> ICompoundEdit`	`beginEdit(String undoName, String redoName, Iterable<T> items)` Starts an `ICompoundEdit` that uses the `memento design pattern` to record changes to the items in the given `items` collection.
`default <T> ICompoundEdit`	`beginEdit(String undoName, String redoName, Iterable<T> items, IMementoSupportProvider<T> provider)` Starts an `ICompoundEdit` that uses the `memento design pattern` to record changes to the items in the given `items` collection.
`default SizeD`	`calculateLabelPreferredSize(ILabelOwner owner, String text)` Calculates the preferred size of a label with the given properties.
`default SizeD`	`calculateLabelPreferredSize(ILabelOwner owner, String text, ILabelModelParameter layoutParameter)` Calculates the preferred size of a label with the given properties.
`default SizeD`	`calculateLabelPreferredSize(ILabelOwner owner, String text, ILabelModelParameter layoutParameter, ILabelStyle style)` Calculates the preferred size of a label with the given properties.
`default SizeD`	`calculateLabelPreferredSize(ILabelOwner owner, String text, ILabelModelParameter layoutParameter, ILabelStyle style, Object tag)` Calculates the preferred size of a label with the given properties.
`default void`	`clear()` Clears the graph instance, removing all entities in proper order.
`default void`	`clearBends(IEdge edge)` Removes all bends from the given edge.
`boolean`	`contains(IModelItem item)` Determines whether this graph contains the specified item.
`default ILabelModelParameter`	`createDefaultLabelLayoutParameter(ILabelOwner owner)` Creates the label layout parameter for a given `ILabelOwner`.
`default IPortLocationModelParameter`	`createDefaultPortLocationParameter(IPortOwner owner)` Creates a location model parameter for a newly created `IPort` at the `owner` that matches the `location`.
`default IPortLocationModelParameter`	`createDefaultPortLocationParameter(IPortOwner owner, PointD location)` Creates a location model parameter for a newly created `IPort` at the `owner` that matches the `location`.
`default IEdge`	`createEdge(INode source, INode target)` Convenience method that creates and returns an edge that connects to the given node instances using the given style instance.
`default IEdge`	`createEdge(INode source, INode target, IEdgeStyle style)` Convenience method that creates and returns an edge that connects to the given node instances using the given style instance.
`IEdge`	`createEdge(INode source, INode target, IEdgeStyle style, Object tag)` Convenience method that creates and returns an edge that connects to the given node instances using the given style instance.
`default IEdge`	`createEdge(IPort sourcePort, IPort targetPort)` Creates and returns an edge that connects to the given port instances.
`default IEdge`	`createEdge(IPort sourcePort, IPort targetPort, IEdgeStyle style)` Creates and returns an edge that connects to the given port instances.
`IEdge`	`createEdge(IPort sourcePort, IPort targetPort, IEdgeStyle style, Object tag)` Creates and returns an edge that connects to the given port instances.
`default INode`	`createGroupNode()` Creates a new group node using the provided style and layout as a child of `parent`.
`default INode`	`createGroupNode(INode parent)` Creates a new group node using the provided style and layout as a child of `parent`.
`default INode`	`createGroupNode(INode parent, RectD layout)` Creates a new group node using the provided style and layout as a child of `parent`.
`default INode`	`createGroupNode(INode parent, RectD layout, INodeStyle style)` Creates a new group node using the provided style and layout as a child of `parent`.
`INode`	`createGroupNode(INode parent, RectD layout, INodeStyle style, Object tag)` Creates a new group node using the provided style and layout as a child of `parent`.
`default INode`	`createNode()` Creates a new ordinary node as a direct descendant of `parent` using the given layout and style.
`default INode`	`createNode(INode parent)` Creates a new ordinary node as a direct descendant of `parent` using the given layout and style.
`default INode`	`createNode(INode parent, RectD layout)` Creates a new ordinary node as a direct descendant of `parent` using the given layout and style.
`default INode`	`createNode(INode parent, RectD layout, INodeStyle style)` Creates a new ordinary node as a direct descendant of `parent` using the given layout and style.
`INode`	`createNode(INode parent, RectD layout, INodeStyle style, Object tag)` Creates a new ordinary node as a direct descendant of `parent` using the given layout and style.
`default INode`	`createNode(PointD location)` Creates and returns a node using the specified initial center location and style, as well as the tag.
`default INode`	`createNode(PointD location, INodeStyle style)` Creates and returns a node using the specified initial center location and style, as well as the tag.
`default INode`	`createNode(PointD location, INodeStyle style, Object tag)` Creates and returns a node using the specified initial center location and style, as well as the tag.
`default INode`	`createNode(RectD layout)` Creates and returns a node using the specified values for the initial geometry, style, and `Tag`.
`default INode`	`createNode(RectD layout, INodeStyle style)` Creates and returns a node using the specified values for the initial geometry, style, and `Tag`.
`INode`	`createNode(RectD layout, INodeStyle style, Object tag)` Creates and returns a node using the specified values for the initial geometry, style, and `Tag`.
`default int`	`degree(IPort port)` Calculates the number of edges at the given `IPort` for this graph.
`default int`	`degree(IPortOwner owner)` Calculates the number of edges at the given `IPortOwner` for this graph.
`default IListEnumerable<IEdge>`	`edgesAt(IPort port)` Convenience method that yields all adjacent edges at the given port.
`IListEnumerable<IEdge>`	`edgesAt(IPort port, AdjacencyTypes type)` Returns an `Iterable` for all edges that are adjacent to the given port as a `SourcePort` or `TargetPort`.
`default IListEnumerable<IEdge>`	`edgesAt(IPortOwner owner)` Convenience method that yields all adjacent edges at the given owner.
`IListEnumerable<IEdge>`	`edgesAt(IPortOwner owner, AdjacencyTypes type)` Returns an `IListEnumerable` for all edges that have the given port owner as their `target port's` or `source port's` `Owner` depending on the `AdjacencyTypes`.
`default IListEnumerable<IBend>`	`getBends()` Gets a live view of all bends contained in this `IGraph`.
`IListEnumerable<INode>`	`getChildren(INode node)` Returns an enumerable over the children of the provided node.
`default GraphDecorator`	`getDecorator()` Gets a `GraphDecorator` instance for use with the given graph.
`default RectD`	`getDefaultNodeBounds()` Gets the default node bounds for newly created nodes in the graph.
`default IEdge`	`getEdge(IPort sourcePort, IPort targetPort)` Finds an edge that connects `sourcePort` and `targetPort` in the given graph.
`default IEdge`	`getEdge(IPortOwner from, IPortOwner to)` Finds an edge that connects `from` and `to` in the given graph.
`IEdgeDefaults`	`getEdgeDefaults()` Gets the defaults for normal edges.
`default IListEnumerable<ILabel>`	`getEdgeLabels()` Gets a live view of all edge labels contained in this `IGraph`.
`IListEnumerable<IEdge>`	`getEdges()` A view of the edges contained in this graph.
`default IFoldingView`	`getFoldingView()` Gets the `folding view` instance associated with this `IGraph` or `null` if none is associated with it.
`default GroupingSupport`	`getGroupingSupport()` Creates a `GroupingSupport` instance for the graph.
`INodeDefaults`	`getGroupNodeDefaults()` Gets the defaults for group nodes.
`default ILabelDefaults`	`getLabelDefaults(ILabelOwner owner)` Gets the `label defaults` for a given `ILabelOwner` in the context of the `graph`.
`IListEnumerable<ILabel>`	`getLabels()` A view of the node and edge labels contained in this graph.
`IMapperRegistry`	`getMapperRegistry()` Gets the mapper registry that is associated with this graph instance.
`INodeDefaults`	`getNodeDefaults()` Gets the defaults for normal nodes.
`default IListEnumerable<ILabel>`	`getNodeLabels()` Gets a live view of all node labels contained in this `IGraph`.
`IListEnumerable<INode>`	`getNodes()` A view of the nodes contained in this graph.
`INode`	`getParent(INode node)` Returns the parent node of the node or `null` if `node` is a top-level node.
`default IPortDefaults`	`getPortDefaults(IPortOwner owner)` Gets the `port defaults` for a given `IPortOwner` in the context of the `graph`.
`IListEnumerable<IPort>`	`getPorts()` A view of the ports contained in this graph.
`default UndoEngine`	`getUndoEngine()` Gets the `UndoEngine` instance associated with this `IGraph` or `null` if none is associated with it.
`default INode`	`groupNodes(INode... children)` Groups the nodes into a newly created group node.
`default void`	`groupNodes(INode parent, Iterable<INode> children)` Groups the nodes in `children` into the provided group node.
`default INode`	`groupNodes(Iterable<INode> children)` Groups the nodes in `children` into a newly created group node.
`default int`	`inDegree(IPort port)` Calculates the number of incoming edges at the given `IPort` for this graph.
`default int`	`inDegree(IPortOwner owner)` Calculates the number of incoming edges at the given `IPortOwner` for this graph.
`default IListEnumerable<IEdge>`	`inEdgesAt(IPort port)` Convenience method that yields the incoming edges at the given port.
`default IListEnumerable<IEdge>`	`inEdgesAt(IPortOwner owner)` Convenience method that yields the incoming edges at the given owner.
`void`	`invalidateDisplays()` Causes the `DisplaysInvalidated` event to be triggered.
`boolean`	`isGroupNode(INode node)` Returns whether the given node is considered a group node.
`default boolean`	`isUndoEngineEnabled()` Convenience method to check whether undo capabilities are enabled for this instance.
`default <T extends IPortOwner> IEnumerable<T>`	`neighbors(Class<T> tType, T portOwner)` Enumerates the neighbors of a given `IPortOwner`.
`default int`	`outDegree(IPort port)` Calculates the number of outgoing edges at the given `IPort` for this graph.
`default int`	`outDegree(IPortOwner owner)` Calculates the number of outgoing edges at the given `IPortOwner` for this graph.
`default IListEnumerable<IEdge>`	`outEdgesAt(IPort port)` Convenience method that yields the outgoing edges at the given port.
`default IListEnumerable<IEdge>`	`outEdgesAt(IPortOwner owner)` Convenience method that yields the outgoing edges at the given owner.
`default <T extends IPortOwner> IEnumerable<T>`	`predecessors(Class<T> tType, T portOwner)` Enumerates the predecessors of a given `IPortOwner`.
`void`	`remove(IModelItem item)` Removes the given `item` from this graph.
`void`	`removeBendAddedListener(IEventHandler<ItemEventArgs<IBend>> bendAddedEvent)` Removes the given listener for the `BendAdded` event that occurs when a bend has been added to an edge in this graph.
`void`	`removeBendLocationChangedListener(IBendLocationChangedHandler bendLocationChangedEvent)` Removes the given listener for the `BendLocationChanged` event that occurs when the location of a bend has been changed.
`void`	`removeBendRemovedListener(IEventHandler<BendEventArgs> bendRemovedEvent)` Removes the given listener for the `BendRemoved` event that occurs when a bend has been removed from an edge in this graph.
`void`	`removeBendTagChangedListener(IEventHandler<ItemChangedEventArgs<IBend,Object>> bendTagChangedEvent)` Removes the given listener for the `BendTagChanged` event that occurs when the `tag` of a bend has been replaced.
`void`	`removeDisplaysInvalidatedListener(IEventHandler<IEventArgs> displaysInvalidatedEvent)` Removes the given listener for the `DisplaysInvalidated` event that occurs when the graph has changed visually and the display should be updated to reflect the changes.
`void`	`removeEdgeCreatedListener(IEventHandler<ItemEventArgs<IEdge>> edgeCreatedEvent)` Removes the given listener for the `EdgeCreated` event that occurs when an edge has been created.
`void`	`removeEdgePortsChangedListener(IEventHandler<EdgeEventArgs> edgePortsChangedEvent)` Removes the given listener for the `EdgePortsChanged` event that occurs when an edge had its `SourcePort` or `TargetPort` `changed`.
`void`	`removeEdgeRemovedListener(IEventHandler<EdgeEventArgs> edgeRemovedEvent)` Removes the given listener for the `EdgeRemoved` event that occurs when an edge has been removed.
`void`	`removeEdgeStyleChangedListener(IEventHandler<ItemChangedEventArgs<IEdge,IEdgeStyle>> edgeStyleChangedEvent)` Removes the given listener for the `EdgeStyleChanged` event that occurs when an edge style has been replaced.
`void`	`removeEdgeTagChangedListener(IEventHandler<ItemChangedEventArgs<IEdge,Object>> edgeTagChangedEvent)` Removes the given listener for the `EdgeTagChanged` event that occurs when the `tag` of an edge has been replaced.
`void`	`removeGraphTagChangedListener(IEventHandler<ItemChangedEventArgs<IGraph,Object>> graphTagChangedEvent)` Removes the given listener for the `GraphTagChanged` event that occurs when the `tag` of the graph has been replaced.
`void`	`removeIsGroupNodeChangedListener(IEventHandler<NodeEventArgs> isGroupNodeChangedEvent)` Removes the given listener for the `IsGroupNodeChanged` event.
`void`	`removeLabelAddedListener(IEventHandler<ItemEventArgs<ILabel>> labelAddedEvent)` Removes the given listener for the `LabelAdded` event that occurs when a label has been added to this graph instance.
`void`	`removeLabelLayoutParameterChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,ILabelModelParameter>> labelLayoutParameterChangedEvent)` Removes the given listener for the `LabelLayoutParameterChanged` event that occurs when the model parameter of a label has been changed.
`void`	`removeLabelPreferredSizeChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,SizeD>> labelPreferredSizeChangedEvent)` Removes the given listener for the `LabelPreferredSizeChanged` event that occurs when the preferred size of a label has been changed.
`void`	`removeLabelRemovedListener(IEventHandler<LabelEventArgs> labelRemovedEvent)` Removes the given listener for the `LabelRemoved` event that occurs when a label has been removed from this graph instance.
`void`	`removeLabelStyleChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,ILabelStyle>> labelStyleChangedEvent)` Removes the given listener for the `LabelStyleChanged` event that occurs when a label style has been replaced.
`void`	`removeLabelTagChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,Object>> labelTagChangedEvent)` Removes the given listener for the `LabelTagChanged` event that occurs when the `tag` of a label has been replaced.
`void`	`removeLabelTextChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,String>> labelTextChangedEvent)` Removes the given listener for the `LabelTextChanged` event that occurs when the text of a label has been changed.
`void`	`removeNodeCreatedListener(IEventHandler<ItemEventArgs<INode>> nodeCreatedEvent)` Removes the given listener for the `NodeCreated` event that occurs when a node has been created.
`void`	`removeNodeLayoutChangedListener(INodeLayoutChangedHandler nodeLayoutChangedEvent)` Removes the given listener for the `NodeLayoutChanged` event that occurs when a node layout has been changed.
`void`	`removeNodeRemovedListener(IEventHandler<NodeEventArgs> nodeRemovedEvent)` Removes the given listener for the `NodeRemoved` event that occurs when a node has been removed.
`void`	`removeNodeStyleChangedListener(IEventHandler<ItemChangedEventArgs<INode,INodeStyle>> nodeStyleChangedEvent)` Removes the given listener for the `NodeStyleChanged` event that occurs when a node style has been replaced.
`void`	`removeNodeTagChangedListener(IEventHandler<ItemChangedEventArgs<INode,Object>> nodeTagChangedEvent)` Removes the given listener for the `NodeTagChanged` event that occurs when the `tag` of a node has been replaced.
`void`	`removeParentChangedListener(IEventHandler<NodeEventArgs> parentChangedEvent)` Removes the given listener for the `ParentChanged` event.
`void`	`removePortAddedListener(IEventHandler<ItemEventArgs<IPort>> portAddedEvent)` Removes the given listener for the `PortAdded` event that occurs when a port has been added to this graph instance.
`void`	`removePortLocationParameterChangedListener(IEventHandler<ItemChangedEventArgs<IPort,IPortLocationModelParameter>> portLocationParameterChangedEvent)` Removes the given listener for the `PortLocationParameterChanged` event that occurs when the location model parameter of a port has been changed.
`void`	`removePortRemovedListener(IEventHandler<PortEventArgs> portRemovedEvent)` Removes the given listener for the `PortRemoved` event that occurs when a port has been removed from its `owner`.
`void`	`removePortStyleChangedListener(IEventHandler<ItemChangedEventArgs<IPort,IPortStyle>> portStyleChangedEvent)` Removes the given listener for the `PortStyleChanged` event that occurs when a port style has been replaced.
`void`	`removePortTagChangedListener(IEventHandler<ItemChangedEventArgs<IPort,Object>> portTagChangedEvent)` Removes the given listener for the `PortTagChanged` event that occurs when the `tag` of a port has been replaced.
`default void`	`reverse(IEdge edge)` Reverses an edge by `setting source and target port` to `TargetPort` and `SourcePort`.
`void`	`setBendLocation(IBend bend, PointD location)` Modifies the location of the given bend.
`void`	`setEdgeDefaults(IEdgeDefaults value)` Sets the defaults for normal edges.
`void`	`setEdgePorts(IEdge edge, IPort sourcePort, IPort targetPort)` Sets the ports of the given edge to the new values.
`void`	`setGroupNodeDefaults(INodeDefaults value)` Sets the defaults for group nodes.
`void`	`setIsGroupNode(INode node, boolean isGroupNode)` Determines whether the given node should be considered a group node.
`void`	`setLabelLayoutParameter(ILabel label, ILabelModelParameter layoutParameter)` Sets the label model parameter for the given label.
`void`	`setLabelPreferredSize(ILabel label, SizeD preferredSize)` Sets the preferred size of the label.
`void`	`setLabelText(ILabel label, String text)` Sets the label text of the given label.
`default void`	`setNodeCenter(INode node, PointD center)` Sets the center of a node to the given world coordinates.
`void`	`setNodeDefaults(INodeDefaults value)` Sets the defaults for normal nodes.
`void`	`setNodeLayout(INode node, RectD layout)` Sets the layout of the given node to the new value.
`void`	`setParent(INode node, INode parent)` Sets the parent node for a given node.
`default void`	`setPortLocation(IPort port, PointD location)` Convenience method that tries to set the absolute coordinates of the given port to the given values.
`void`	`setPortLocationParameter(IPort port, IPortLocationModelParameter locationParameter)` Sets a new `IPortLocationModelParameter` for the given port.
`default void`	`setRelativePortLocation(IPort port, PointD relativeLocation)` Tries to set the location of the port relative to its `owner` if the owner is a `node`.
`void`	`setStyle(IEdge edge, IEdgeStyle style)` Assigns the given style instance by reference to the edge.
`void`	`setStyle(ILabel label, ILabelStyle style)` Assigns the given style instance by reference to the label.
`void`	`setStyle(INode node, INodeStyle style)` Assigns the given style instance by reference to the node.
`void`	`setStyle(IPort port, IPortStyle style)` Assigns the given style instance by reference to the port.
`default void`	`setUndoEngineEnabled(boolean enabled)` Convenience method that enables or disables undo capabilities for this instance.
`default <T extends IPortOwner> IEnumerable<T>`	`successors(Class<T> tType, T portOwner)` Enumerates the successors of a given `IPortOwner`.

Methods inherited from interface com.yworks.yfiles.graph.ILookup
createDictionaryLookup, createDynamic, createSingle, createSingle, createWrapped, lookup, lookup, lookup, safeLookup

Methods inherited from interface com.yworks.yfiles.graph.ITagOwner
getTag, setTag

- Method Detail
  - addBend
```
default IBend addBend(IEdge edge,
                      PointD location)
```
    Adds a bend at the given index to the given edge using the coordinates provided.
    The added instance will be returned.
    
    Parameters:
    
    edge - The edge to which the bend will be added.
    
    location - the coordinates to use for the newly created bend
    
    Returns:
    
    a newly created live bend
    
    See Also:
    
    remove(IModelItem), setBendLocation(IBend, PointD)
  - addBend
```
IBend addBend(IEdge edge,
              PointD location,
              int index)
```
    Adds a bend at the given index to the given edge using the coordinates provided.
    The added instance will be returned.
    
    Parameters:
    
    edge - The edge to which the bend will be added.
    
    location - the coordinates to use for the newly created bend
    
    index - The index for the newly added bend; a negative value (which is the default) indicates that the bend should be appended to the end of the list of bends.
    
    Returns:
    
    a newly created live bend
    
    See Also:
    
    remove(IModelItem), setBendLocation(IBend, PointD)
  - addBendAddedListener
```
void addBendAddedListener(IEventHandler<ItemEventArgs<IBend>> bendAddedEvent)
```
    Adds the given listener for the BendAdded event that occurs when a bend has been added to an edge in this graph.
    This event is intended to provide notification of low level changes in the graph structure. Please use the BendCreated event if you are interested only in bend creation events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the bend creation that has triggered this event.
    
    Parameters:
    
    bendAddedEvent - The listener to add.
    
    See Also:
    
    addBend(IEdge, PointD, int), CreateBendInputMode.addBendCreatedListener(IEventHandler), removeBendAddedListener(IEventHandler)
  - addBendLocationChangedListener
```
void addBendLocationChangedListener(IBendLocationChangedHandler bendLocationChangedEvent)
```
    Adds the given listener for the BendLocationChanged event that occurs when the location of a bend has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    bendLocationChangedEvent - The listener to add.
    
    See Also:
    
    setBendLocation(IBend, PointD), removeBendLocationChangedListener(IBendLocationChangedHandler)
  - addBendRemovedListener
```
void addBendRemovedListener(IEventHandler<BendEventArgs> bendRemovedEvent)
```
    Adds the given listener for the BendRemoved event that occurs when a bend has been removed from an edge in this graph.
    This event will be triggered, too, if an edge has been removed from the graph, for each of the bends that belonged to the edge.
    
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in bend removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the bend removal that has triggered this event.
    
    Parameters:
    
    bendRemovedEvent - The listener to add.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), removeBendRemovedListener(IEventHandler)
  - addBends
```
default void addBends(IEdge edge,
                      Iterable<PointD> locations)
```
    Adds bends with the given locations to the end of the bend list of the given edge.
    
    Parameters:
    
    edge - The edge to add the bends to.
    
    locations - The locations of the bends.
  - addBendTagChangedListener
```
void addBendTagChangedListener(IEventHandler<ItemChangedEventArgs<IBend,Object>> bendTagChangedEvent)
```
    Adds the given listener for the BendTagChanged event that occurs when the tag of a bend has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    bendTagChangedEvent - The listener to add.
    
    See Also:
    
    ITagOwner.getTag(), removeBendTagChangedListener(IEventHandler)
  - addDisplaysInvalidatedListener
```
void addDisplaysInvalidatedListener(IEventHandler<IEventArgs> displaysInvalidatedEvent)
```
    Adds the given listener for the DisplaysInvalidated event that occurs when the graph has changed visually and the display should be updated to reflect the changes.
    This event is invoked with IEventArgs.EMPTY per default.
    
    Parameters:
    
    displaysInvalidatedEvent - The listener to add.
    
    See Also:
    
    removeDisplaysInvalidatedListener(IEventHandler)
  - addEdgeCreatedListener
```
void addEdgeCreatedListener(IEventHandler<ItemEventArgs<IEdge>> edgeCreatedEvent)
```
    Adds the given listener for the EdgeCreated event that occurs when an edge has been created.
    This event is intended to provide notification of low level changes in the graph structure. Please use the EdgeCreated event if you are interested only in edge creation events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the edge creation that has triggered this event.
    
    Parameters:
    
    edgeCreatedEvent - The listener to add.
    
    See Also:
    
    createEdge(IPort, IPort, IEdgeStyle, Object), CreateEdgeInputMode.addEdgeCreatedListener(IEventHandler), removeEdgeCreatedListener(IEventHandler)
  - addEdgePortsChangedListener
```
void addEdgePortsChangedListener(IEventHandler<EdgeEventArgs> edgePortsChangedEvent)
```
    Adds the given listener for the EdgePortsChanged event that occurs when an edge had its SourcePort or TargetPort changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    edgePortsChangedEvent - The listener to add.
    
    See Also:
    
    setEdgePorts(IEdge, IPort, IPort), removeEdgePortsChangedListener(IEventHandler)
  - addEdgeRemovedListener
```
void addEdgeRemovedListener(IEventHandler<EdgeEventArgs> edgeRemovedEvent)
```
    Adds the given listener for the EdgeRemoved event that occurs when an edge has been removed.
    This event will be triggered, too, prior to a node removal.
    
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in edge removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the edge removal that has triggered this event.
    
    Parameters:
    
    edgeRemovedEvent - The listener to add.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), removeEdgeRemovedListener(IEventHandler)
  - addEdgeStyleChangedListener
```
void addEdgeStyleChangedListener(IEventHandler<ItemChangedEventArgs<IEdge,IEdgeStyle>> edgeStyleChangedEvent)
```
    Adds the given listener for the EdgeStyleChanged event that occurs when an edge style has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    edgeStyleChangedEvent - The listener to add.
    
    See Also:
    
    setStyle(IEdge, IEdgeStyle), removeEdgeStyleChangedListener(IEventHandler)
  - addEdgeTagChangedListener
```
void addEdgeTagChangedListener(IEventHandler<ItemChangedEventArgs<IEdge,Object>> edgeTagChangedEvent)
```
    Adds the given listener for the EdgeTagChanged event that occurs when the tag of an edge has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    edgeTagChangedEvent - The listener to add.
    
    See Also:
    
    ITagOwner.getTag(), removeEdgeTagChangedListener(IEventHandler)
  - addGraphTagChangedListener
```
void addGraphTagChangedListener(IEventHandler<ItemChangedEventArgs<IGraph,Object>> graphTagChangedEvent)
```
    Adds the given listener for the GraphTagChanged event that occurs when the tag of the graph has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    graphTagChangedEvent - The listener to add.
    
    See Also:
    
    ITagOwner.getTag(), removeGraphTagChangedListener(IEventHandler)
  - addIsGroupNodeChangedListener
```
void addIsGroupNodeChangedListener(IEventHandler<NodeEventArgs> isGroupNodeChangedEvent)
```
    Adds the given listener for the IsGroupNodeChanged event.
    Event that will be triggered if the group node status of a node has changed.
    
    Parameters:
    
    isGroupNodeChangedEvent - The listener to add.
    
    See Also:
    
    removeIsGroupNodeChangedListener(IEventHandler)
  - addLabel
```
default ILabel addLabel(ILabelOwner owner,
                        String text)
```
    Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
    
    Parameters:
    
    owner - the item to add the label to.
    
    text - the initial text of the label
    
    Returns:
    
    the newly created label
    
    See Also:
    
    addLabelAddedListener(IEventHandler), setLabelText(ILabel, String), setLabelLayoutParameter(ILabel, ILabelModelParameter), setStyle(ILabel, ILabelStyle), VoidLabelStyle.INSTANCE
  - addLabel
```
default ILabel addLabel(ILabelOwner owner,
                        String text,
                        ILabelModelParameter layoutParameter)
```
    Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
    
    Parameters:
    
    owner - the item to add the label to.
    
    text - the initial text of the label
    
    layoutParameter - The label model parameter instance to use.
    
    Returns:
    
    the newly created label
    
    See Also:
    
    addLabelAddedListener(IEventHandler), setLabelText(ILabel, String), setLabelLayoutParameter(ILabel, ILabelModelParameter), setStyle(ILabel, ILabelStyle), VoidLabelStyle.INSTANCE
  - addLabel
```
default ILabel addLabel(ILabelOwner owner,
                        String text,
                        ILabelModelParameter layoutParameter,
                        ILabelStyle style)
```
    Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
    
    Parameters:
    
    owner - the item to add the label to.
    
    text - the initial text of the label
    
    layoutParameter - The label model parameter instance to use.
    
    style - The style to use for the label
    
    Returns:
    
    the newly created label
    
    See Also:
    
    addLabelAddedListener(IEventHandler), setLabelText(ILabel, String), setLabelLayoutParameter(ILabel, ILabelModelParameter), setStyle(ILabel, ILabelStyle), VoidLabelStyle.INSTANCE
  - addLabel
```
default ILabel addLabel(ILabelOwner owner,
                        String text,
                        ILabelModelParameter layoutParameter,
                        ILabelStyle style,
                        SizeD preferredSize)
```
    Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
    
    Parameters:
    
    owner - the item to add the label to.
    
    text - the initial text of the label
    
    layoutParameter - The label model parameter instance to use.
    
    style - The style to use for the label
    
    preferredSize - The initial values to use for the PreferredSize.
    
    Returns:
    
    the newly created label
    
    See Also:
    
    addLabelAddedListener(IEventHandler), setLabelText(ILabel, String), setLabelLayoutParameter(ILabel, ILabelModelParameter), setStyle(ILabel, ILabelStyle), VoidLabelStyle.INSTANCE
  - addLabel
```
ILabel addLabel(ILabelOwner owner,
                String text,
                ILabelModelParameter layoutParameter,
                ILabelStyle style,
                SizeD preferredSize,
                Object tag)
```
    Add a label to the given item using the text as the initial label text and label model parameter, style and tag.
    
    Parameters:
    
    owner - the item to add the label to.
    
    text - the initial text of the label
    
    layoutParameter - The label model parameter instance to use.
    
    style - The style to use for the label
    
    preferredSize - The initial values to use for the PreferredSize.
    
    tag - the initial Tag to assign.
    
    Returns:
    
    the newly created label
    
    See Also:
    
    addLabelAddedListener(IEventHandler), setLabelText(ILabel, String), setLabelLayoutParameter(ILabel, ILabelModelParameter), setStyle(ILabel, ILabelStyle), VoidLabelStyle.INSTANCE
  - addLabelAddedListener
```
void addLabelAddedListener(IEventHandler<ItemEventArgs<ILabel>> labelAddedEvent)
```
    Adds the given listener for the LabelAdded event that occurs when a label has been added to this graph instance.
    This event is intended to provide notification of low level changes in the graph structure. Please use the LabelAdded event if you are interested only in label creation events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the label creation that has triggered this event.
    
    Parameters:
    
    labelAddedEvent - The listener to add.
    
    See Also:
    
    addLabel(ILabelOwner, String, ILabelModelParameter, ILabelStyle, SizeD, Object), GraphEditorInputMode.addLabelAddedListener(IEventHandler), removeLabelAddedListener(IEventHandler)
  - addLabelLayoutParameterChangedListener
```
void addLabelLayoutParameterChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,ILabelModelParameter>> labelLayoutParameterChangedEvent)
```
    Adds the given listener for the LabelLayoutParameterChanged event that occurs when the model parameter of a label has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelLayoutParameterChangedEvent - The listener to add.
    
    See Also:
    
    setLabelLayoutParameter(ILabel, ILabelModelParameter), removeLabelLayoutParameterChangedListener(IEventHandler)
  - addLabelPreferredSizeChangedListener
```
void addLabelPreferredSizeChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,SizeD>> labelPreferredSizeChangedEvent)
```
    Adds the given listener for the LabelPreferredSizeChanged event that occurs when the preferred size of a label has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelPreferredSizeChangedEvent - The listener to add.
    
    See Also:
    
    setLabelPreferredSize(ILabel, SizeD), removeLabelPreferredSizeChangedListener(IEventHandler)
  - addLabelRemovedListener
```
void addLabelRemovedListener(IEventHandler<LabelEventArgs> labelRemovedEvent)
```
    Adds the given listener for the LabelRemoved event that occurs when a label has been removed from this graph instance.
    This event will also be triggered, prior to the removal of the owner of the label.
    
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in label removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the label removal that has triggered this event.
    
    Parameters:
    
    labelRemovedEvent - The listener to add.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), GraphEditorInputMode.addLabelTextChangedListener(IEventHandler), removeLabelRemovedListener(IEventHandler)
  - addLabelStyleChangedListener
```
void addLabelStyleChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,ILabelStyle>> labelStyleChangedEvent)
```
    Adds the given listener for the LabelStyleChanged event that occurs when a label style has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelStyleChangedEvent - The listener to add.
    
    See Also:
    
    setStyle(ILabel, ILabelStyle), removeLabelStyleChangedListener(IEventHandler)
  - addLabelTagChangedListener
```
void addLabelTagChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,Object>> labelTagChangedEvent)
```
    Adds the given listener for the LabelTagChanged event that occurs when the tag of a label has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelTagChangedEvent - The listener to add.
    
    See Also:
    
    ITagOwner.getTag(), removeLabelTagChangedListener(IEventHandler)
  - addLabelTextChangedListener
```
void addLabelTextChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,String>> labelTextChangedEvent)
```
    Adds the given listener for the LabelTextChanged event that occurs when the text of a label has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelTextChangedEvent - The listener to add.
    
    See Also:
    
    setLabelText(ILabel, String), removeLabelTextChangedListener(IEventHandler)
  - addNodeCreatedListener
```
void addNodeCreatedListener(IEventHandler<ItemEventArgs<INode>> nodeCreatedEvent)
```
    Adds the given listener for the NodeCreated event that occurs when a node has been created.
    This event is intended to provide notification of low level changes in the graph structure. Please use the NodeCreated event if you are interested only in node creation events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the node creation that has triggered this event.
    
    Parameters:
    
    nodeCreatedEvent - The listener to add.
    
    See Also:
    
    createNode(RectD, INodeStyle, Object), createNode(INode, RectD, INodeStyle, Object), createGroupNode(INode, RectD, INodeStyle, Object), GraphEditorInputMode.addNodeCreatedListener(IEventHandler), removeNodeCreatedListener(IEventHandler)
  - addNodeLayoutChangedListener
```
void addNodeLayoutChangedListener(INodeLayoutChangedHandler nodeLayoutChangedEvent)
```
    Adds the given listener for the NodeLayoutChanged event that occurs when a node layout has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    nodeLayoutChangedEvent - The listener to add.
    
    See Also:
    
    removeNodeLayoutChangedListener(INodeLayoutChangedHandler)
  - addNodeRemovedListener
```
void addNodeRemovedListener(IEventHandler<NodeEventArgs> nodeRemovedEvent)
```
    Adds the given listener for the NodeRemoved event that occurs when a node has been removed.
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in node removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the node removal that has triggered this event.
    
    Parameters:
    
    nodeRemovedEvent - The listener to add.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), removeNodeRemovedListener(IEventHandler)
  - addNodeStyleChangedListener
```
void addNodeStyleChangedListener(IEventHandler<ItemChangedEventArgs<INode,INodeStyle>> nodeStyleChangedEvent)
```
    Adds the given listener for the NodeStyleChanged event that occurs when a node style has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    nodeStyleChangedEvent - The listener to add.
    
    See Also:
    
    setStyle(INode, INodeStyle), removeNodeStyleChangedListener(IEventHandler)
  - addNodeTagChangedListener
```
void addNodeTagChangedListener(IEventHandler<ItemChangedEventArgs<INode,Object>> nodeTagChangedEvent)
```
    Adds the given listener for the NodeTagChanged event that occurs when the tag of a node has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    nodeTagChangedEvent - The listener to add.
    
    See Also:
    
    ITagOwner.getTag(), removeNodeTagChangedListener(IEventHandler)
  - addParentChangedListener
```
void addParentChangedListener(IEventHandler<NodeEventArgs> parentChangedEvent)
```
    Adds the given listener for the ParentChanged event.
    Event that will be triggered if an node has been reparented in the model.
    
    Parameters:
    
    parentChangedEvent - The listener to add.
    
    See Also:
    
    removeParentChangedListener(IEventHandler)
  - addPort
```
default IPort addPort(IPortOwner owner)
```
    Add a port to the given port owner using the location model parameter, style and tag.
    The locationParameter determines the location of the port.
    
    Depending on the implementation this method may throw an UnsupportedOperationException if the type of the owner instance does not support adding of ports.
    
    Throws:
    
    UnsupportedOperationException - If this instance cannot add a port to owner.
    
    Parameters:
    
    owner - the owner to add the port instance to.
    
    Returns:
    
    the newly created port
    
    See Also:
    
    addPortAddedListener(IEventHandler), VoidPortStyle.INSTANCE
  - addPort
```
default IPort addPort(IPortOwner owner,
                      IPortLocationModelParameter locationParameter)
```
    Add a port to the given port owner using the location model parameter, style and tag.
    The locationParameter determines the location of the port.
    
    Depending on the implementation this method may throw an UnsupportedOperationException if the type of the owner instance does not support adding of ports.
    
    Throws:
    
    UnsupportedOperationException - If this instance cannot add a port to owner.
    
    Parameters:
    
    owner - the owner to add the port instance to.
    
    locationParameter - the parameter to use for the port to determine its location.
    
    Returns:
    
    the newly created port
    
    See Also:
    
    addPortAddedListener(IEventHandler), VoidPortStyle.INSTANCE
  - addPort
```
default IPort addPort(IPortOwner owner,
                      IPortLocationModelParameter locationParameter,
                      IPortStyle style)
```
    Add a port to the given port owner using the location model parameter, style and tag.
    The locationParameter determines the location of the port.
    
    Depending on the implementation this method may throw an UnsupportedOperationException if the type of the owner instance does not support adding of ports.
    
    Throws:
    
    UnsupportedOperationException - If this instance cannot add a port to owner.
    
    Parameters:
    
    owner - the owner to add the port instance to.
    
    locationParameter - the parameter to use for the port to determine its location.
    
    style - the style to initially assign to the Style property, e.g. VoidPortStyle.INSTANCE.
    
    Returns:
    
    the newly created port
    
    See Also:
    
    addPortAddedListener(IEventHandler), VoidPortStyle.INSTANCE
  - addPort
```
IPort addPort(IPortOwner owner,
              IPortLocationModelParameter locationParameter,
              IPortStyle style,
              Object tag)
```
    Add a port to the given port owner using the location model parameter, style and tag.
    The locationParameter determines the location of the port.
    
    Depending on the implementation this method may throw an UnsupportedOperationException if the type of the owner instance does not support adding of ports.
    
    Throws:
    
    UnsupportedOperationException - If this instance cannot add a port to owner.
    
    Parameters:
    
    owner - the owner to add the port instance to.
    
    locationParameter - the parameter to use for the port to determine its location.
    
    style - the style to initially assign to the Style property, e.g. VoidPortStyle.INSTANCE.
    
    tag - the initial Tag to assign.
    
    Returns:
    
    the newly created port
    
    See Also:
    
    addPortAddedListener(IEventHandler), VoidPortStyle.INSTANCE
  - addPort
```
default IPort addPort(IPortOwner owner,
                      PointD location)
```
    Add a port to the given port owner using the absolute coordinates as the new initial position of the port anchor.
    
    Throws:
    
    UnsupportedOperationException - If this instance cannot add a port to owner.
    
    Parameters:
    
    owner - the owner to add the port instance to.
    
    location - the location to use for the port to determine its location. This is passed to the createDefaultPortLocationParameter(IPortOwner, PointD) method to determine the initial IPortLocationModelParameter to use.
    
    Returns:
    
    the newly created port
  - addPort
```
default IPort addPort(IPortOwner owner,
                      PointD location,
                      IPortStyle style)
```
    Add a port to the given port owner using the absolute coordinates as the new initial position of the port anchor.
    
    Throws:
    
    UnsupportedOperationException - If this instance cannot add a port to owner.
    
    Parameters:
    
    owner - the owner to add the port instance to.
    
    location - the location to use for the port to determine its location. This is passed to the createDefaultPortLocationParameter(IPortOwner, PointD) method to determine the initial IPortLocationModelParameter to use.
    
    style - the style to initially assign to the Style property, e.g. VoidPortStyle.INSTANCE.
    
    Returns:
    
    the newly created port
  - addPort
```
default IPort addPort(IPortOwner owner,
                      PointD location,
                      IPortStyle style,
                      Object tag)
```
    Add a port to the given port owner using the absolute coordinates as the new initial position of the port anchor.
    
    Throws:
    
    UnsupportedOperationException - If this instance cannot add a port to owner.
    
    Parameters:
    
    owner - the owner to add the port instance to.
    
    location - the location to use for the port to determine its location. This is passed to the createDefaultPortLocationParameter(IPortOwner, PointD) method to determine the initial IPortLocationModelParameter to use.
    
    style - the style to initially assign to the Style property, e.g. VoidPortStyle.INSTANCE.
    
    tag - the initial Tag to assign.
    
    Returns:
    
    the newly created port
  - addPortAddedListener
```
void addPortAddedListener(IEventHandler<ItemEventArgs<IPort>> portAddedEvent)
```
    Adds the given listener for the PortAdded event that occurs when a port has been added to this graph instance.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the port creation that has triggered this event.
    
    Parameters:
    
    portAddedEvent - The listener to add.
    
    See Also:
    
    addPort(IPortOwner, IPortLocationModelParameter, IPortStyle, Object), createEdge(INode, INode, IEdgeStyle, Object), removePortAddedListener(IEventHandler)
  - addPortLocationParameterChangedListener
```
void addPortLocationParameterChangedListener(IEventHandler<ItemChangedEventArgs<IPort,IPortLocationModelParameter>> portLocationParameterChangedEvent)
```
    Adds the given listener for the PortLocationParameterChanged event that occurs when the location model parameter of a port has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    portLocationParameterChangedEvent - The listener to add.
    
    See Also:
    
    setPortLocationParameter(IPort, IPortLocationModelParameter), removePortLocationParameterChangedListener(IEventHandler)
  - addPortRemovedListener
```
void addPortRemovedListener(IEventHandler<PortEventArgs> portRemovedEvent)
```
    Adds the given listener for the PortRemoved event that occurs when a port has been removed from its owner.
    This event will also be triggered prior to the removal of the corresponding owner of the port.
    
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in port removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the port removal that has triggered this event.
    
    Parameters:
    
    portRemovedEvent - The listener to add.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), removePortRemovedListener(IEventHandler)
  - addPortStyleChangedListener
```
void addPortStyleChangedListener(IEventHandler<ItemChangedEventArgs<IPort,IPortStyle>> portStyleChangedEvent)
```
    Adds the given listener for the PortStyleChanged event that occurs when a port style has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    portStyleChangedEvent - The listener to add.
    
    See Also:
    
    setStyle(IPort, IPortStyle), removePortStyleChangedListener(IEventHandler)
  - addPortTagChangedListener
```
void addPortTagChangedListener(IEventHandler<ItemChangedEventArgs<IPort,Object>> portTagChangedEvent)
```
    Adds the given listener for the PortTagChanged event that occurs when the tag of a port has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    portTagChangedEvent - The listener to add.
    
    See Also:
    
    ITagOwner.getTag(), removePortTagChangedListener(IEventHandler)
  - addRelativePort
```
default IPort addRelativePort(INode node,
                              PointD relativeLocation)
```
    Adds a new port to the graph at the node using a location that is relative to the center of the node.
    The port style for the newly-created port is taken from the graph's defaults. The location parameter is determined by delegating to addPort(IPortOwner, PointD, IPortStyle, Object).
    
    Parameters:
    
    node - The owner of the port.
    
    relativeLocation - The offset of the port relative to the center of the Layout.
    
    Returns:
    
    The newly added port instance.
  - addUndoUnit
```
default void addUndoUnit(String undoName,
                         String redoName,
                         Runnable undo,
                         Runnable redo)
```
    Convenience method that uses the UndoEngine from the IGraph's ILookup to add a unit.
    
    Parameters:
    
    undoName - The name of the undo operation.
    
    redoName - The name of the redo operation.
    
    undo - The undo action.
    
    redo - The redo action.
  - adjustGroupNodeLayout
```
default void adjustGroupNodeLayout(INode groupNode)
```
    Method to adjust the size of a group node.
    This will resize the group node bounds such that the node requires the least amount of space. If the node does not have any children, its bounds will be left unchanged. This will also respect any INodeSizeConstraintProviders for INodes, that are available in the lookup of the groupNode.
    
    Parameters:
    
    groupNode - The group node to adjust the size of.
    
    See Also:
    
    IGroupBoundsCalculator, INodeSizeConstraintProvider, GroupingSupport.calculateMinimumEnclosedArea(INode), GroupingSupport.enlargeGroupNode(INode, boolean), GroupingSupport.enlargeAllGroupNodes()
  - adjustLabelPreferredSize
```
default void adjustLabelPreferredSize(ILabel label)
```
    Adjusts the PreferredSize property of a label to fit the suggested size of its ILabelStyleRenderer.
    This implementation uses the style's renderer for the label to determine the preferred rendering size. This is useful after the label's content or style have been changed.
    
    Parameters:
    
    label - The label to adjust the size for.
    
    See Also:
    
    ILabelDefaults.isAutoAdjustingPreferredSizeEnabled()
  - applyLayout
```
default void applyLayout(ILayoutAlgorithm layout)
```
    Convenience method that runs a layout on a graph using LayoutGraphAdapter.applyLayout(IGraph, ILayoutAlgorithm, LayoutData).
    
    Parameters:
    
    layout - The layout.
    
    See Also:
    
    applyLayout(ILayoutAlgorithm, LayoutData), GraphControl.morphLayout(ILayoutAlgorithm, Duration, IEventHandler), GraphControl.morphLayout(ILayoutAlgorithm, Duration, LayoutData, IEventHandler)
  - applyLayout
```
default void applyLayout(ILayoutAlgorithm layout,
                         LayoutData layoutData)
```
    Convenience method that runs a layout on a graph using LayoutGraphAdapter.applyLayout(IGraph, ILayoutAlgorithm, LayoutData).
    
    Parameters:
    
    layout - The layout.
    
    layoutData - The layout data.
    
    See Also:
    
    applyLayout(ILayoutAlgorithm, LayoutData), GraphControl.morphLayout(ILayoutAlgorithm, Duration, IEventHandler), GraphControl.morphLayout(ILayoutAlgorithm, Duration, LayoutData, IEventHandler)
  - beginEdit
```
default ICompoundEdit beginEdit(String undoName,
                                String redoName)
```
    Starts an ICompoundEdit that records graph changes and custom undo units in a single compound unit.
    This method can be used to bracket several undo units. All edits added to the queue after this call and before a call to ICompoundEdit.cancel() or ICompoundEdit.commit() will be placed into the queue as a single block.
    
    Client code needs to make sure that either the ICompoundEdit.cancel() or ICompoundEdit.commit() method is called on the returned instance.
    
    The returned instance implements IDisposable which enables the use of a using statement to automatically call the ICompoundEdit.commit() method after a set of changes:
    
    Parameters:
    
    undoName - The undo name for the compound edit.
    
    redoName - The redo name for the compound edit.
    
    Returns:
    
    The handle to stop the recording by calling ICompoundEdit.cancel() or ICompoundEdit.commit() on it.
  - beginEdit
```
default <T> ICompoundEdit beginEdit(String undoName,
                                    String redoName,
                                    Iterable<T> items)
```
    Starts an ICompoundEdit that uses the memento design pattern to record changes to the items in the given items collection.
    This method uses the IMementoSupport returned by the provider to record the state of an item at the beginning of the edit and when ICompoundEdit.commit() is called to create an IUndoUnit that can revert the item to the recorded state and back. If no provider is given, this method uses the IMementoSupport returned by the ILookup.lookup(Class) implementation of the items to record the state of an item at the beginning of the edit and when ICompoundEdit.commit() is called to create an IUndoUnit that can revert the item to the recorded state and back.
    
    Calling this method will immediately enqueue an IUndoUnit into the undo queue. Subsequent additions to the queue will be added after the created instance, even if they are added to the queue before the ICompoundEdit.commit() method has been called.
    
    The following is an example implementation of an item that is being managed using IMementoSupport:
    
    A collection of items from this type can then be watched using the following code snippet:
    
    Alternatively, when using a specific provider, consider the following examples. The following is an example implementation of an item that is being managed using IMementoSupport:
    
    A collection of items from this type can then be watched using the following code snippet, using the provider to return an appropriate IMementoSupport implementation:
    
    Implementing the IMementoSupport interface is quite unrestrained, the type of the state returned by IMementoSupport.getState(Object) method can by anything as long as the IMementoSupport.applyState(Object, Object) and IMementoSupport.stateEquals(Object, Object) methods can deal with it:
    
    In summary, use this concept when you want to track the state of items during certain operations for undo/redo. This is efficient if it's easier to handle an item's state than the changes to the item themselves. If you want to focus on the changes or on certain events, you should use custom IUndoUnit
    
    Type Parameters:
    
    T - The type of the items that will be modified subsequently.
    
    Parameters:
    
    undoName - The UndoName of the IUndoUnit that will be placed into the undo queue after ICompoundEdit.commit() has been called.
    
    redoName - The RedoName of the IUndoUnit that will be placed into the undo queue after ICompoundEdit.commit() has been called.
    
    items - The items that will be changed after this call and before the call to ICompoundEdit.commit().
    
    Returns:
    
    An implementation of the ICompoundEdit interface whose ICompoundEdit.commit() or ICompoundEdit.cancel() methods need to be called after the items have been modified.
    
    See Also:
    
    IMementoSupport
  - beginEdit
```
default <T> ICompoundEdit beginEdit(String undoName,
                                    String redoName,
                                    Iterable<T> items,
                                    IMementoSupportProvider<T> provider)
```
    Starts an ICompoundEdit that uses the memento design pattern to record changes to the items in the given items collection.
    This method uses the IMementoSupport returned by the provider to record the state of an item at the beginning of the edit and when ICompoundEdit.commit() is called to create an IUndoUnit that can revert the item to the recorded state and back. If no provider is given, this method uses the IMementoSupport returned by the ILookup.lookup(Class) implementation of the items to record the state of an item at the beginning of the edit and when ICompoundEdit.commit() is called to create an IUndoUnit that can revert the item to the recorded state and back.
    
    Calling this method will immediately enqueue an IUndoUnit into the undo queue. Subsequent additions to the queue will be added after the created instance, even if they are added to the queue before the ICompoundEdit.commit() method has been called.
    
    The following is an example implementation of an item that is being managed using IMementoSupport:
    
    A collection of items from this type can then be watched using the following code snippet:
    
    Alternatively, when using a specific provider, consider the following examples. The following is an example implementation of an item that is being managed using IMementoSupport:
    
    A collection of items from this type can then be watched using the following code snippet, using the provider to return an appropriate IMementoSupport implementation:
    
    Implementing the IMementoSupport interface is quite unrestrained, the type of the state returned by IMementoSupport.getState(Object) method can by anything as long as the IMementoSupport.applyState(Object, Object) and IMementoSupport.stateEquals(Object, Object) methods can deal with it:
    
    In summary, use this concept when you want to track the state of items during certain operations for undo/redo. This is efficient if it's easier to handle an item's state than the changes to the item themselves. If you want to focus on the changes or on certain events, you should use custom IUndoUnit
    
    Type Parameters:
    
    T - The type of the items that will be modified subsequently.
    
    Parameters:
    
    undoName - The UndoName of the IUndoUnit that will be placed into the undo queue after ICompoundEdit.commit() has been called.
    
    redoName - The RedoName of the IUndoUnit that will be placed into the undo queue after ICompoundEdit.commit() has been called.
    
    items - The items that will be changed after this call and before the call to ICompoundEdit.commit().
    
    provider - The provider for the IMementoSupport of the items. if the provider returns null for a given item, changes to this item are not being recorded.
    
    Returns:
    
    An implementation of the ICompoundEdit interface whose ICompoundEdit.commit() or ICompoundEdit.cancel() methods need to be called after the items have been modified.
    
    See Also:
    
    IMementoSupport
  - calculateLabelPreferredSize
```
default SizeD calculateLabelPreferredSize(ILabelOwner owner,
                                          String text)
```
    Calculates the preferred size of a label with the given properties.
    
    Parameters:
    
    owner - The item that will own the label.
    
    text - The text.
    
    Returns:
    
    The size as calculated by the ILabelStyleRenderer.
  - calculateLabelPreferredSize
```
default SizeD calculateLabelPreferredSize(ILabelOwner owner,
                                          String text,
                                          ILabelModelParameter layoutParameter)
```
    Calculates the preferred size of a label with the given properties.
    
    Parameters:
    
    owner - The item that will own the label.
    
    text - The text.
    
    layoutParameter - The label model parameter.
    
    Returns:
    
    The size as calculated by the ILabelStyleRenderer.
  - calculateLabelPreferredSize
```
default SizeD calculateLabelPreferredSize(ILabelOwner owner,
                                          String text,
                                          ILabelModelParameter layoutParameter,
                                          ILabelStyle style)
```
    Calculates the preferred size of a label with the given properties.
    
    Parameters:
    
    owner - The item that will own the label.
    
    text - The text.
    
    layoutParameter - The label model parameter.
    
    style - The label style.
    
    Returns:
    
    The size as calculated by the ILabelStyleRenderer.
  - calculateLabelPreferredSize
```
default SizeD calculateLabelPreferredSize(ILabelOwner owner,
                                          String text,
                                          ILabelModelParameter layoutParameter,
                                          ILabelStyle style,
                                          Object tag)
```
    Calculates the preferred size of a label with the given properties.
    
    Parameters:
    
    owner - The item that will own the label.
    
    text - The text.
    
    layoutParameter - The label model parameter.
    
    style - The label style.
    
    tag - The tag for the label.
    
    Returns:
    
    The size as calculated by the ILabelStyleRenderer.
  - clear
```
default void clear()
```
    Clears the graph instance, removing all entities in proper order.
    
    See Also:
    
    remove(IModelItem), remove(IModelItem)
  - clearBends
```
default void clearBends(IEdge edge)
```
    Removes all bends from the given edge.
    The edge must be part of this graph at the time of the invocation. This will trigger the corresponding events.
    
    Parameters:
    
    edge - the edge whose bends will be removed
    
    See Also:
    
    remove(IModelItem), addBendRemovedListener(IEventHandler)
  - contains
```
boolean contains(IModelItem item)
```
    Determines whether this graph contains the specified item.
    
    Parameters:
    
    item - The item.
    
    Returns:
    
    true if this graph contains the specified item; otherwise, false.
  - createDefaultLabelLayoutParameter
```
default ILabelModelParameter createDefaultLabelLayoutParameter(ILabelOwner owner)
```
    Creates the label layout parameter for a given ILabelOwner.
    This implementation uses the label defaults for the graph to obtain the parameter instance.
    
    Parameters:
    
    owner - The item that is the Owner of the label in question.
    
    Returns:
    
    The default label layout parameter to use for newly created labels at the item.
    
    See Also:
    
    ILabelDefaults.getLayoutParameterInstance(ILabelOwner), getLabelDefaults(ILabelOwner)
  - createDefaultPortLocationParameter
```
default IPortLocationModelParameter createDefaultPortLocationParameter(IPortOwner owner)
```
    Creates a location model parameter for a newly created IPort at the owner that matches the location.
    If location is null, this method uses the port defaults for the owner to obtain the location parameter.
    
    Parameters:
    
    owner - The owner of the port.
    
    Returns:
    
    Either a location model parameter that matches the location, or the default parameter to use for the IPortOwner as returned by IPortDefaults.getLocationParameterInstance(IPortOwner).
    
    See Also:
    
    IPortLocationModel.createParameter(IPortOwner, PointD), getPortDefaults(IPortOwner)
  - createDefaultPortLocationParameter
```
default IPortLocationModelParameter createDefaultPortLocationParameter(IPortOwner owner,
                                                                       PointD location)
```
    Creates a location model parameter for a newly created IPort at the owner that matches the location.
    If location is null, this method uses the port defaults for the owner to obtain the location parameter.
    
    Parameters:
    
    owner - The owner of the port.
    
    location - The location in the world coordinate system where the port should be added.
    
    Returns:
    
    Either a location model parameter that matches the location, or the default parameter to use for the IPortOwner as returned by IPortDefaults.getLocationParameterInstance(IPortOwner).
    
    See Also:
    
    IPortLocationModel.createParameter(IPortOwner, PointD), getPortDefaults(IPortOwner)
  - createEdge
```
default IEdge createEdge(INode source,
                         INode target)
```
    Convenience method that creates and returns an edge that connects to the given node instances using the given style instance.
    The nodes must be part of this graph at the time of the invocation, and the implementation will choose the IPort instances to which the edge will be connected. The edge will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    source - The source node the created edge will connect to. It is up to the implementation to decide which port to use at the given node. The implementation may create a new port of the edge.
    
    target - The target node the created edge will connect to. It is up to the implementation to decide which port to use at the given node. The implementation may create a new port of the edge.
    
    Returns:
    
    the newly created edge instance
    
    See Also:
    
    addEdgeCreatedListener(IEventHandler), VoidEdgeStyle.INSTANCE
  - createEdge
```
default IEdge createEdge(INode source,
                         INode target,
                         IEdgeStyle style)
```
    Convenience method that creates and returns an edge that connects to the given node instances using the given style instance.
    The nodes must be part of this graph at the time of the invocation, and the implementation will choose the IPort instances to which the edge will be connected. The edge will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    source - The source node the created edge will connect to. It is up to the implementation to decide which port to use at the given node. The implementation may create a new port of the edge.
    
    target - The target node the created edge will connect to. It is up to the implementation to decide which port to use at the given node. The implementation may create a new port of the edge.
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    Returns:
    
    the newly created edge instance
    
    See Also:
    
    addEdgeCreatedListener(IEventHandler), VoidEdgeStyle.INSTANCE
  - createEdge
```
IEdge createEdge(INode source,
                 INode target,
                 IEdgeStyle style,
                 Object tag)
```
    Convenience method that creates and returns an edge that connects to the given node instances using the given style instance.
    The nodes must be part of this graph at the time of the invocation, and the implementation will choose the IPort instances to which the edge will be connected. The edge will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    source - The source node the created edge will connect to. It is up to the implementation to decide which port to use at the given node. The implementation may create a new port of the edge.
    
    target - The target node the created edge will connect to. It is up to the implementation to decide which port to use at the given node. The implementation may create a new port of the edge.
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    tag - The initial value of the Tag that will be assigned to the new edge.
    
    Returns:
    
    the newly created edge instance
    
    See Also:
    
    addEdgeCreatedListener(IEventHandler), VoidEdgeStyle.INSTANCE
  - createEdge
```
default IEdge createEdge(IPort sourcePort,
                         IPort targetPort)
```
    Creates and returns an edge that connects to the given port instances.
    The ports must be part of this graph at the time of the invocation. The edge will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    sourcePort - The source port the created edge will connect to.
    
    targetPort - The target port the created edge will connect to.
    
    Returns:
    
    the newly created edge instance
    
    See Also:
    
    addEdgeCreatedListener(IEventHandler), VoidEdgeStyle.INSTANCE
  - createEdge
```
default IEdge createEdge(IPort sourcePort,
                         IPort targetPort,
                         IEdgeStyle style)
```
    Creates and returns an edge that connects to the given port instances.
    The ports must be part of this graph at the time of the invocation. The edge will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    sourcePort - The source port the created edge will connect to.
    
    targetPort - The target port the created edge will connect to.
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    Returns:
    
    the newly created edge instance
    
    See Also:
    
    addEdgeCreatedListener(IEventHandler), VoidEdgeStyle.INSTANCE
  - createEdge
```
IEdge createEdge(IPort sourcePort,
                 IPort targetPort,
                 IEdgeStyle style,
                 Object tag)
```
    Creates and returns an edge that connects to the given port instances.
    The ports must be part of this graph at the time of the invocation. The edge will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    sourcePort - The source port the created edge will connect to.
    
    targetPort - The target port the created edge will connect to.
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    tag - The initial value of the Tag that will be assigned to the new edge.
    
    Returns:
    
    the newly created edge instance
    
    See Also:
    
    addEdgeCreatedListener(IEventHandler), VoidEdgeStyle.INSTANCE
  - createGroupNode
```
default INode createGroupNode()
```
    Creates a new group node using the provided style and layout as a child of parent.
    The group node will be a direct descendant of parent.
    
    To create group nodes interactively use the GraphEditorInputMode as input mode and enable the grouping operations.
    
    Returns:
    
    The newly created group node.
  - createGroupNode
```
default INode createGroupNode(INode parent)
```
    Creates a new group node using the provided style and layout as a child of parent.
    The group node will be a direct descendant of parent.
    
    To create group nodes interactively use the GraphEditorInputMode as input mode and enable the grouping operations.
    
    Parameters:
    
    parent - The node to use as the parent in the grouping hierarchy or null if the new node should become a top-level node.
    
    Returns:
    
    The newly created group node.
  - createGroupNode
```
default INode createGroupNode(INode parent,
                              RectD layout)
```
    Creates a new group node using the provided style and layout as a child of parent.
    The group node will be a direct descendant of parent.
    
    To create group nodes interactively use the GraphEditorInputMode as input mode and enable the grouping operations.
    
    Parameters:
    
    parent - The node to use as the parent in the grouping hierarchy or null if the new node should become a top-level node.
    
    layout - The initial layout to use for the new node.
    
    Returns:
    
    The newly created group node.
  - createGroupNode
```
default INode createGroupNode(INode parent,
                              RectD layout,
                              INodeStyle style)
```
    Creates a new group node using the provided style and layout as a child of parent.
    The group node will be a direct descendant of parent.
    
    To create group nodes interactively use the GraphEditorInputMode as input mode and enable the grouping operations.
    
    Parameters:
    
    parent - The node to use as the parent in the grouping hierarchy or null if the new node should become a top-level node.
    
    layout - The initial layout to use for the new node.
    
    style - The style to use for the new node.
    
    Returns:
    
    The newly created group node.
  - createGroupNode
```
INode createGroupNode(INode parent,
                      RectD layout,
                      INodeStyle style,
                      Object tag)
```
    Creates a new group node using the provided style and layout as a child of parent.
    The group node will be a direct descendant of parent.
    
    To create group nodes interactively use the GraphEditorInputMode as input mode and enable the grouping operations.
    
    Parameters:
    
    parent - The node to use as the parent in the grouping hierarchy or null if the new node should become a top-level node.
    
    layout - The initial layout to use for the new node.
    
    style - The style to use for the new node.
    
    tag - The Tag to assign to the INode.
    
    Returns:
    
    The newly created group node.
  - createNode
```
default INode createNode()
```
    Creates a new ordinary node as a direct descendant of parent using the given layout and style.
    
    Returns:
    
    The newly created node.
    
    See Also:
    
    setParent(INode, INode), createNode(RectD, INodeStyle, Object), createGroupNode(INode, RectD, INodeStyle, Object)
  - createNode
```
default INode createNode(INode parent)
```
    Creates a new ordinary node as a direct descendant of parent using the given layout and style.
    
    Parameters:
    
    parent - The node to use as the parent in the grouping hierarchy or null if the new node should become a top-level node.
    
    Returns:
    
    The newly created node.
    
    See Also:
    
    setParent(INode, INode), createNode(RectD, INodeStyle, Object), createGroupNode(INode, RectD, INodeStyle, Object)
  - createNode
```
default INode createNode(INode parent,
                         RectD layout)
```
    Creates a new ordinary node as a direct descendant of parent using the given layout and style.
    
    Parameters:
    
    parent - The node to use as the parent in the grouping hierarchy or null if the new node should become a top-level node.
    
    layout - The layout to use initially. The values will be copied to the node's Layout field.
    
    Returns:
    
    The newly created node.
    
    See Also:
    
    setParent(INode, INode), createNode(RectD, INodeStyle, Object), createGroupNode(INode, RectD, INodeStyle, Object)
  - createNode
```
default INode createNode(INode parent,
                         RectD layout,
                         INodeStyle style)
```
    Creates a new ordinary node as a direct descendant of parent using the given layout and style.
    
    Parameters:
    
    parent - The node to use as the parent in the grouping hierarchy or null if the new node should become a top-level node.
    
    layout - The layout to use initially. The values will be copied to the node's Layout field.
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    Returns:
    
    The newly created node.
    
    See Also:
    
    setParent(INode, INode), createNode(RectD, INodeStyle, Object), createGroupNode(INode, RectD, INodeStyle, Object)
  - createNode
```
INode createNode(INode parent,
                 RectD layout,
                 INodeStyle style,
                 Object tag)
```
    Creates a new ordinary node as a direct descendant of parent using the given layout and style.
    
    Parameters:
    
    parent - The node to use as the parent in the grouping hierarchy or null if the new node should become a top-level node.
    
    layout - The layout to use initially. The values will be copied to the node's Layout field.
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    tag - The Tag to assign to the INode.
    
    Returns:
    
    The newly created node.
    
    See Also:
    
    setParent(INode, INode), createNode(RectD, INodeStyle, Object), createGroupNode(INode, RectD, INodeStyle, Object)
  - createNode
```
default INode createNode(PointD location)
```
    Creates and returns a node using the specified initial center location and style, as well as the tag.
    The node will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    location - the initial coordinates of the center of the node's Layout property
    
    Returns:
    
    A newly created node instance
    
    See Also:
    
    addNodeCreatedListener(IEventHandler)
  - createNode
```
default INode createNode(PointD location,
                         INodeStyle style)
```
    Creates and returns a node using the specified initial center location and style, as well as the tag.
    The node will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    location - the initial coordinates of the center of the node's Layout property
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    Returns:
    
    A newly created node instance
    
    See Also:
    
    addNodeCreatedListener(IEventHandler)
  - createNode
```
default INode createNode(PointD location,
                         INodeStyle style,
                         Object tag)
```
    Creates and returns a node using the specified initial center location and style, as well as the tag.
    The node will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    location - the initial coordinates of the center of the node's Layout property
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    tag - The initial value of the Tag that will be assigned to the new node.
    
    Returns:
    
    A newly created node instance
    
    See Also:
    
    addNodeCreatedListener(IEventHandler)
  - createNode
```
default INode createNode(RectD layout)
```
    Creates and returns a node using the specified values for the initial geometry, style, and Tag.
    The node will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    layout - The layout to use initially. The values will be copied to the node's Layout field
    
    Returns:
    
    A newly created node instance
    
    See Also:
    
    addNodeCreatedListener(IEventHandler), VoidNodeStyle.INSTANCE
  - createNode
```
default INode createNode(RectD layout,
                         INodeStyle style)
```
    Creates and returns a node using the specified values for the initial geometry, style, and Tag.
    The node will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    layout - The layout to use initially. The values will be copied to the node's Layout field
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    Returns:
    
    A newly created node instance
    
    See Also:
    
    addNodeCreatedListener(IEventHandler), VoidNodeStyle.INSTANCE
  - createNode
```
INode createNode(RectD layout,
                 INodeStyle style,
                 Object tag)
```
    Creates and returns a node using the specified values for the initial geometry, style, and Tag.
    The node will be a part of this graph after the method returns. This will trigger the corresponding events.
    
    Parameters:
    
    layout - The layout to use initially. The values will be copied to the node's Layout field
    
    style - The style instance that will be assigned to the newly created instance. This is done by reference.
    
    tag - The initial value of the Tag that will be assigned to the new node.
    
    Returns:
    
    A newly created node instance
    
    See Also:
    
    addNodeCreatedListener(IEventHandler), VoidNodeStyle.INSTANCE
  - degree
```
default int degree(IPort port)
```
    Calculates the number of edges at the given IPort for this graph.
    Note that an edge that is both incoming and outgoing will be counted twice.
    
    Parameters:
    
    port - The port owner to count the degree of.
    
    Returns:
    
    The number of edges that are incident to the port.
  - degree
```
default int degree(IPortOwner owner)
```
    Calculates the number of edges at the given IPortOwner for this graph.
    Note that an edge that is both incoming and outgoing will be counted twice.
    
    Parameters:
    
    owner - The port owner to count the degree of.
    
    Returns:
    
    The number of edges that are incident to the port owner.
  - edgesAt
```
default IListEnumerable<IEdge> edgesAt(IPort port)
```
    Convenience method that yields all adjacent edges at the given port.
    This method delegates to edgesAt(IPort, AdjacencyTypes) using AdjacencyTypes.ALL.
    
    Note that even though edges can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the edges in your own list, if possible. This is not necessary for the first or last element or when iterating over the adjacent edges via a foreach loop.
    
    Parameters:
    
    port - The owner of the edges.
    
    Returns:
    
    An enumerable for the edges.
  - edgesAt
```
IListEnumerable<IEdge> edgesAt(IPort port,
                               AdjacencyTypes type)
```
    Returns an Iterable for all edges that are adjacent to the given port as a SourcePort or TargetPort.
    Note that even though edges can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the edges in your own list, if possible. This is not necessary for the first or last element or when iterating over the adjacent edges via a foreach loop.
    
    Throws:
    
    IllegalArgumentException - If port is not in this graph
    
    Parameters:
    
    port - the port to check
    
    type - The type of adjacency to consider.
    
    Returns:
    
    An enumeration of all adjacent edges of the given type.
    
    See Also:
    
    edgesAt(IPort), inEdgesAt(IPort), outEdgesAt(IPort), AdjacencyTypes
  - edgesAt
```
default IListEnumerable<IEdge> edgesAt(IPortOwner owner)
```
    Convenience method that yields all adjacent edges at the given owner.
    This method delegates to edgesAt(IPortOwner, AdjacencyTypes) using AdjacencyTypes.ALL.
    
    Note that even though edges can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the edges in your own list, if possible. This is not necessary for the first or last element or when iterating over the adjacent edges via a foreach loop.
    
    Parameters:
    
    owner - The owner of the edges.
    
    Returns:
    
    An enumerable for the edges.
  - edgesAt
```
IListEnumerable<IEdge> edgesAt(IPortOwner owner,
                               AdjacencyTypes type)
```
    Returns an IListEnumerable for all edges that have the given port owner as their target port's or source port's Owner depending on the AdjacencyTypes.
    Note that even though edges can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the edges in your own list, if possible. This is not necessary for the first or last element or when iterating over the adjacent edges via a foreach loop.
    
    Throws:
    
    IllegalArgumentException - If owner is not in this graph
    
    Parameters:
    
    type - The type of adjacency to consider.
    
    owner - the port owner to check
    
    Returns:
    
    An enumeration of all adjacent edges of the given type.
    
    See Also:
    
    edgesAt(IPortOwner), inEdgesAt(IPortOwner), outEdgesAt(IPortOwner), AdjacencyTypes
  - getBends
```
default IListEnumerable<IBend> getBends()
```
    Gets a live view of all bends contained in this IGraph.
  - getChildren
```
IListEnumerable<INode> getChildren(INode node)
```
    Returns an enumerable over the children of the provided node.
    
    Throws:
    
    IllegalArgumentException - If node is not in this graph
    
    Parameters:
    
    node - The node for which to return the children or null if the top-level nodes should be returned.
    
    Returns:
    
    All nodes that have node as their parent.
  - getDecorator
```
default GraphDecorator getDecorator()
```
    Gets a GraphDecorator instance for use with the given graph.
    
    Returns:
    
    A new GraphDecorator
  - getDefaultNodeBounds
```
default RectD getDefaultNodeBounds()
```
    Gets the default node bounds for newly created nodes in the graph.
    
    Returns:
    
    The bounds anchored at (0,0) with NodeDefaults' Size.
  - getEdge
```
default IEdge getEdge(IPort sourcePort,
                      IPort targetPort)
```
    Finds an edge that connects sourcePort and targetPort in the given graph.
    
    Parameters:
    
    sourcePort - The SourcePort of the edge to find.
    
    targetPort - The TargetPort of the edge to find.
    
    Returns:
    
    An edge that satisfies the constraints or null, if none was found.
  - getEdge
```
default IEdge getEdge(IPortOwner from,
                      IPortOwner to)
```
    Finds an edge that connects from and to in the given graph.
    
    Parameters:
    
    from - The SourcePort owner of the edge to find.
    
    to - The TargetPort owner of the edge to find.
    
    Returns:
    
    An edge that satisfies the constraints or null, if none was found.
  - getEdgeDefaults
```
IEdgeDefaults getEdgeDefaults()
```
    Gets the defaults for normal edges.
    The settings that are obtained from the instance influence newly created elements only. Setting different defaults afterwards does not influence existing elements.
    
    Returns:
    
    The EdgeDefaults.
    
    See Also:
    
    setEdgeDefaults(IEdgeDefaults)
  - getEdgeLabels
```
default IListEnumerable<ILabel> getEdgeLabels()
```
    Gets a live view of all edge labels contained in this IGraph.
  - getEdges
```
IListEnumerable<IEdge> getEdges()
```
    A view of the edges contained in this graph.
    This is a live view of the edges that always represents the current state of the graph. The same reference will be returned for each invocation.
    
    Note that even though edges can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the edges in your own list, if possible. This is not necessary for the first or last element or when iterating over the edges via a foreach loop.
    
    Returns:
    
    The Edges.
  - getFoldingView
```
default IFoldingView getFoldingView()
```
    Gets the folding view instance associated with this IGraph or null if none is associated with it.
    This convenience method uses the ILookup.lookup(Class) of the IGraph to obtain the IFoldingView.
    
    Returns:
    
    The implementation of the IFoldingView or null if the graph has not been created by a FoldingManager.
    
    See Also:
    
    FoldingManager, FoldingManager.createFoldingView(INode, java.util.function.Predicate)
  - getGroupingSupport
```
default GroupingSupport getGroupingSupport()
```
    Creates a GroupingSupport instance for the graph.
    GroupingSupport provides less frequently used methods for grouped graphs, such as methods for analyzing and walking the grouping hierarchy.
    
    Returns:
    
    A new GroupingSupport for the graph.
  - getGroupNodeDefaults
```
INodeDefaults getGroupNodeDefaults()
```
    Gets the defaults for group nodes.
    
    Returns:
    
    The GroupNodeDefaults.
    
    See Also:
    
    setGroupNodeDefaults(INodeDefaults)
  - getLabelDefaults
```
default ILabelDefaults getLabelDefaults(ILabelOwner owner)
```
    Gets the label defaults for a given ILabelOwner in the context of the graph.
    
    Parameters:
    
    owner - The item that the label defaults are returned for. If this is a group node, the GroupNodeDefaults's label defaults will be returned, otherwise the NodeDefaults or EdgeDefaults labels will be returned.
    
    Returns:
    
    Appropriate ILabelDefaults for the provided owner.
  - getLabels
```
IListEnumerable<ILabel> getLabels()
```
    A view of the node and edge labels contained in this graph.
    This is a live view of the labels that always represents the current state of the graph. The same reference will be returned for each invocation.
    
    Note that even though labels can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the labels in your own list, if possible. This is not necessary for the first or last element or when iterating over the labels via a foreach loop.
    
    Returns:
    
    The Labels.
  - getMapperRegistry
```
IMapperRegistry getMapperRegistry()
```
    Gets the mapper registry that is associated with this graph instance.
    The registry can be used to store data mappings for the items in this instance.
    
    Returns:
    
    The MapperRegistry.
    
    See Also:
    
    IMapperRegistry, IModelItem, ITagOwner.getTag()
  - getNodeDefaults
```
INodeDefaults getNodeDefaults()
```
    Gets the defaults for normal nodes.
    The settings that are obtained from the instance influence newly created elements only. Setting different defaults afterwards does not influence existing elements.
    
    Returns:
    
    The NodeDefaults.
    
    See Also:
    
    setNodeDefaults(INodeDefaults)
  - getNodeLabels
```
default IListEnumerable<ILabel> getNodeLabels()
```
    Gets a live view of all node labels contained in this IGraph.
  - getNodes
```
IListEnumerable<INode> getNodes()
```
    A view of the nodes contained in this graph.
    This is a live view of the nodes that always represents the current state of the graph. The same reference will be returned for each invocation.
    
    Note that even though nodes can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the nodes in your own list, if possible. This is not necessary for the first or last element or when iterating over the nodes via a foreach loop.
    
    Returns:
    
    The Nodes.
  - getParent
```
INode getParent(INode node)
```
    Returns the parent node of the node or null if node is a top-level node.
    
    Throws:
    
    IllegalArgumentException - If node is not in this graph or is null.
    
    Parameters:
    
    node - The node to retrieve the parent node for.
    
    Returns:
    
    The parent node in this hierarchy or null if node is a top-level node.
  - getPortDefaults
```
default IPortDefaults getPortDefaults(IPortOwner owner)
```
    Gets the port defaults for a given IPortOwner in the context of the graph.
    
    Parameters:
    
    owner - The item that the label defaults are returned for. If this is a group node, the GroupNodeDefaults's port defaults will be returned, otherwise the NodeDefaults or EdgeDefaults ports will be returned.
    
    Returns:
    
    Appropriate IPortDefaults for the provided owner.
  - getPorts
```
IListEnumerable<IPort> getPorts()
```
    A view of the ports contained in this graph.
    This is a live view of the ports that always represents the current state of the graph. The same reference will be returned for each invocation.
    
    Note that even though ports can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the ports in your own list, if possible. This is not necessary for the first or last element or when iterating over the ports via a foreach loop.
    
    Returns:
    
    The Ports.
  - getUndoEngine
```
default UndoEngine getUndoEngine()
```
    Gets the UndoEngine instance associated with this IGraph or null if none is associated with it.
    This convenience method uses the ILookup.lookup(Class) of the IGraph to obtain the UndoEngine.
    
    Returns:
    
    The implementation of the UndoEngine or null if undo is not supported.
  - groupNodes
```
default INode groupNodes(INode... children)
```
    Groups the nodes into a newly created group node.
    The group node will be created at the common ancestor level of all nodes in children.
    
    Parameters:
    
    children - The children to group into the new group node.
    
    Returns:
    
    The newly created group node.
    
    See Also:
    
    GroupingSupport.getNearestCommonAncestor(INode[]), groupNodes(Iterable)
  - groupNodes
```
default void groupNodes(INode parent,
                        Iterable<INode> children)
```
    Groups the nodes in children into the provided group node.
    The parent needs to be a group node at the time of the invocation. This operation is basically the same as calling setParent(INode, INode) for each node in the children enumerable whose parent is not part of the set.
    
    Parameters:
    
    parent - The node to use as the parent in the grouping hierarchy.
    
    children - The children to group into the group node.
    
    See Also:
    
    groupNodes(Iterable), setParent(INode, INode), createGroupNode(INode, RectD, INodeStyle, Object)
  - groupNodes
```
default INode groupNodes(Iterable<INode> children)
```
    Groups the nodes in children into a newly created group node.
    The group node will be created at the common ancestor level of all nodes in children.
    
    Parameters:
    
    children - The children to group into the new group node.
    
    Returns:
    
    The newly created group node.
    
    See Also:
    
    GroupingSupport.getNearestCommonAncestor(INode[]), groupNodes(Iterable)
  - inDegree
```
default int inDegree(IPort port)
```
    Calculates the number of incoming edges at the given IPort for this graph.
    
    Parameters:
    
    port - The port to count the incoming edges of.
    
    Returns:
    
    The number of edges that have the port as their target port.
  - inDegree
```
default int inDegree(IPortOwner owner)
```
    Calculates the number of incoming edges at the given IPortOwner for this graph.
    
    Parameters:
    
    owner - The port owner to count the incoming edges of.
    
    Returns:
    
    The number of edges that have the port owner as their target port's owner.
  - inEdgesAt
```
default IListEnumerable<IEdge> inEdgesAt(IPort port)
```
    Convenience method that yields the incoming edges at the given port.
    This method delegates to edgesAt(IPort, AdjacencyTypes) using AdjacencyTypes.INCOMING.
    
    Note that even though edges can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the edges in your own list, if possible. This is not necessary for the first or last element or when iterating over the incoming edges via a foreach loop.
    
    Parameters:
    
    port - The port of the edges.
    
    Returns:
    
    An enumerable for the edges.
  - inEdgesAt
```
default IListEnumerable<IEdge> inEdgesAt(IPortOwner owner)
```
    Convenience method that yields the incoming edges at the given owner.
    This method delegates to edgesAt(IPortOwner, AdjacencyTypes) using AdjacencyTypes.INCOMING.
    
    Note that even though edges can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the edges in your own list, if possible. This is not necessary for the first or last element or when iterating over the incoming edges via a foreach loop.
    
    Parameters:
    
    owner - The owner of the edges.
    
    Returns:
    
    An enumerable for the edges.
  - invalidateDisplays
```
void invalidateDisplays()
```
    Causes the DisplaysInvalidated event to be triggered.
    This method may be called by client code to invalidate all views of the graph that have registered with the DisplaysInvalidated event. Views that need to be informed if non-structural changes have been made to the graph should register with the corresponding event.
  - isGroupNode
```
boolean isGroupNode(INode node)
```
    Returns whether the given node is considered a group node.
    Group nodes may have children but do not necessarily need to have children.
    
    Throws:
    
    IllegalArgumentException - If node is not in this graph.
    
    Parameters:
    
    node - The node to check.
    
    Returns:
    
    Whether the node is considered a group node.
    
    See Also:
    
    getChildren(INode), setIsGroupNode(INode, boolean)
  - isUndoEngineEnabled
```
default boolean isUndoEngineEnabled()
```
    Convenience method to check whether undo capabilities are enabled for this instance.
  - neighbors
```
default <T extends IPortOwner> IEnumerable<T> neighbors(Class<T> tType,
                                                        T portOwner)
```
    Enumerates the neighbors of a given IPortOwner.
    Neighbors are calculated by going through all Ports and inspecting the edges at these ports, collecting the IEdge.opposite(IPort)s.
    
    Type Parameters:
    
    T - The type of the IPortOwner
    
    Parameters:
    
    portOwner - The port owner.
    
    Returns:
    
    An enumerable over all neighbors.
  - outDegree
```
default int outDegree(IPort port)
```
    Calculates the number of outgoing edges at the given IPort for this graph.
    
    Parameters:
    
    port - The port to count the outgoing edges of.
    
    Returns:
    
    The number of edges that have the port as their source port.
  - outDegree
```
default int outDegree(IPortOwner owner)
```
    Calculates the number of outgoing edges at the given IPortOwner for this graph.
    
    Parameters:
    
    owner - The port owner to count the outgoing edges of.
    
    Returns:
    
    The number of edges that have the port owner as their source port's owner.
  - outEdgesAt
```
default IListEnumerable<IEdge> outEdgesAt(IPort port)
```
    Convenience method that yields the outgoing edges at the given port.
    This method delegates to edgesAt(IPort, AdjacencyTypes) using AdjacencyTypes.OUTGOING.
    
    Note that even though edges can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the edges in your own list, if possible. This is not necessary for the first or last element or when iterating over the outgoing edges via a foreach loop.
    
    Parameters:
    
    port - The owner of the edges.
    
    Returns:
    
    An enumerable for the edges.
  - outEdgesAt
```
default IListEnumerable<IEdge> outEdgesAt(IPortOwner owner)
```
    Convenience method that yields the outgoing edges at the given owner.
    This method delegates to edgesAt(IPortOwner, AdjacencyTypes) using AdjacencyTypes.OUTGOING.
    
    Note that even though edges can be accessed via index, the underlying graph structure in the default IGraph implementation is a linked list and indexed access can be slow. In those cases it is recommended to store the edges in your own list, if possible. This is not necessary for the first or last element or when iterating over the outgoing edges via a foreach loop.
    
    Parameters:
    
    owner - The owner of the edges.
    
    Returns:
    
    An enumerable for the edges.
  - predecessors
```
default <T extends IPortOwner> IEnumerable<T> predecessors(Class<T> tType,
                                                           T portOwner)
```
    Enumerates the predecessors of a given IPortOwner.
    Predecessors are calculated by going through all Ports and inspecting the incoming edges at these ports, collecting the SourcePort Owners.
    
    Type Parameters:
    
    T - The type of the IPortOwner
    
    Parameters:
    
    portOwner - The port owner.
    
    Returns:
    
    An enumerable over all predecessors.
  - remove
```
void remove(IModelItem item)
```
    Removes the given item from this graph.
    The item must be a part of this graph.
    
    If the item is a node the NodeRemoved event will be triggered. The implementation will remove all adjacent edges and their corresponding ports in proper order before the node will be removed. Also this will trigger the removal of all labels owned by this instance.
    
    If the item is an edge the EdgeRemoved event will be triggered. The implementation may decide to remove the corresponding ports from the node if no other edge connects to them after the given edge has been removed. Also this will trigger the removal of all labels and bends owned by this instance.
    
    If the item is a bend the BendRemoved event will be triggered.
    
    If the item is a port the PortRemoved event will be triggered. This will also remove all edges that are currently connected to the port.
    
    If the item is a label the LabelRemoved event will be triggered.
    
    Throws:
    
    IllegalArgumentException - item is not part of the graph.
    
    Parameters:
    
    item - the live item to be removed from this graph instance
  - removeBendAddedListener
```
void removeBendAddedListener(IEventHandler<ItemEventArgs<IBend>> bendAddedEvent)
```
    Removes the given listener for the BendAdded event that occurs when a bend has been added to an edge in this graph.
    This event is intended to provide notification of low level changes in the graph structure. Please use the BendCreated event if you are interested only in bend creation events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the bend creation that has triggered this event.
    
    Parameters:
    
    bendAddedEvent - The listener to remove.
    
    See Also:
    
    addBend(IEdge, PointD, int), CreateBendInputMode.addBendCreatedListener(IEventHandler), addBendAddedListener(IEventHandler)
  - removeBendLocationChangedListener
```
void removeBendLocationChangedListener(IBendLocationChangedHandler bendLocationChangedEvent)
```
    Removes the given listener for the BendLocationChanged event that occurs when the location of a bend has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    bendLocationChangedEvent - The listener to remove.
    
    See Also:
    
    setBendLocation(IBend, PointD), addBendLocationChangedListener(IBendLocationChangedHandler)
  - removeBendRemovedListener
```
void removeBendRemovedListener(IEventHandler<BendEventArgs> bendRemovedEvent)
```
    Removes the given listener for the BendRemoved event that occurs when a bend has been removed from an edge in this graph.
    This event will be triggered, too, if an edge has been removed from the graph, for each of the bends that belonged to the edge.
    
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in bend removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the bend removal that has triggered this event.
    
    Parameters:
    
    bendRemovedEvent - The listener to remove.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), addBendRemovedListener(IEventHandler)
  - removeBendTagChangedListener
```
void removeBendTagChangedListener(IEventHandler<ItemChangedEventArgs<IBend,Object>> bendTagChangedEvent)
```
    Removes the given listener for the BendTagChanged event that occurs when the tag of a bend has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    bendTagChangedEvent - The listener to remove.
    
    See Also:
    
    ITagOwner.getTag(), addBendTagChangedListener(IEventHandler)
  - removeDisplaysInvalidatedListener
```
void removeDisplaysInvalidatedListener(IEventHandler<IEventArgs> displaysInvalidatedEvent)
```
    Removes the given listener for the DisplaysInvalidated event that occurs when the graph has changed visually and the display should be updated to reflect the changes.
    This event is invoked with IEventArgs.EMPTY per default.
    
    Parameters:
    
    displaysInvalidatedEvent - The listener to remove.
    
    See Also:
    
    addDisplaysInvalidatedListener(IEventHandler)
  - removeEdgeCreatedListener
```
void removeEdgeCreatedListener(IEventHandler<ItemEventArgs<IEdge>> edgeCreatedEvent)
```
    Removes the given listener for the EdgeCreated event that occurs when an edge has been created.
    This event is intended to provide notification of low level changes in the graph structure. Please use the EdgeCreated event if you are interested only in edge creation events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the edge creation that has triggered this event.
    
    Parameters:
    
    edgeCreatedEvent - The listener to remove.
    
    See Also:
    
    createEdge(IPort, IPort, IEdgeStyle, Object), CreateEdgeInputMode.addEdgeCreatedListener(IEventHandler), addEdgeCreatedListener(IEventHandler)
  - removeEdgePortsChangedListener
```
void removeEdgePortsChangedListener(IEventHandler<EdgeEventArgs> edgePortsChangedEvent)
```
    Removes the given listener for the EdgePortsChanged event that occurs when an edge had its SourcePort or TargetPort changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    edgePortsChangedEvent - The listener to remove.
    
    See Also:
    
    setEdgePorts(IEdge, IPort, IPort), addEdgePortsChangedListener(IEventHandler)
  - removeEdgeRemovedListener
```
void removeEdgeRemovedListener(IEventHandler<EdgeEventArgs> edgeRemovedEvent)
```
    Removes the given listener for the EdgeRemoved event that occurs when an edge has been removed.
    This event will be triggered, too, prior to a node removal.
    
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in edge removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the edge removal that has triggered this event.
    
    Parameters:
    
    edgeRemovedEvent - The listener to remove.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), addEdgeRemovedListener(IEventHandler)
  - removeEdgeStyleChangedListener
```
void removeEdgeStyleChangedListener(IEventHandler<ItemChangedEventArgs<IEdge,IEdgeStyle>> edgeStyleChangedEvent)
```
    Removes the given listener for the EdgeStyleChanged event that occurs when an edge style has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    edgeStyleChangedEvent - The listener to remove.
    
    See Also:
    
    setStyle(IEdge, IEdgeStyle), addEdgeStyleChangedListener(IEventHandler)
  - removeEdgeTagChangedListener
```
void removeEdgeTagChangedListener(IEventHandler<ItemChangedEventArgs<IEdge,Object>> edgeTagChangedEvent)
```
    Removes the given listener for the EdgeTagChanged event that occurs when the tag of an edge has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    edgeTagChangedEvent - The listener to remove.
    
    See Also:
    
    ITagOwner.getTag(), addEdgeTagChangedListener(IEventHandler)
  - removeGraphTagChangedListener
```
void removeGraphTagChangedListener(IEventHandler<ItemChangedEventArgs<IGraph,Object>> graphTagChangedEvent)
```
    Removes the given listener for the GraphTagChanged event that occurs when the tag of the graph has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    graphTagChangedEvent - The listener to remove.
    
    See Also:
    
    ITagOwner.getTag(), addGraphTagChangedListener(IEventHandler)
  - removeIsGroupNodeChangedListener
```
void removeIsGroupNodeChangedListener(IEventHandler<NodeEventArgs> isGroupNodeChangedEvent)
```
    Removes the given listener for the IsGroupNodeChanged event.
    Event that will be triggered if the group node status of a node has changed.
    
    Parameters:
    
    isGroupNodeChangedEvent - The listener to remove.
    
    See Also:
    
    addIsGroupNodeChangedListener(IEventHandler)
  - removeLabelAddedListener
```
void removeLabelAddedListener(IEventHandler<ItemEventArgs<ILabel>> labelAddedEvent)
```
    Removes the given listener for the LabelAdded event that occurs when a label has been added to this graph instance.
    This event is intended to provide notification of low level changes in the graph structure. Please use the LabelAdded event if you are interested only in label creation events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the label creation that has triggered this event.
    
    Parameters:
    
    labelAddedEvent - The listener to remove.
    
    See Also:
    
    addLabel(ILabelOwner, String, ILabelModelParameter, ILabelStyle, SizeD, Object), GraphEditorInputMode.addLabelAddedListener(IEventHandler), addLabelAddedListener(IEventHandler)
  - removeLabelLayoutParameterChangedListener
```
void removeLabelLayoutParameterChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,ILabelModelParameter>> labelLayoutParameterChangedEvent)
```
    Removes the given listener for the LabelLayoutParameterChanged event that occurs when the model parameter of a label has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelLayoutParameterChangedEvent - The listener to remove.
    
    See Also:
    
    setLabelLayoutParameter(ILabel, ILabelModelParameter), addLabelLayoutParameterChangedListener(IEventHandler)
  - removeLabelPreferredSizeChangedListener
```
void removeLabelPreferredSizeChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,SizeD>> labelPreferredSizeChangedEvent)
```
    Removes the given listener for the LabelPreferredSizeChanged event that occurs when the preferred size of a label has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelPreferredSizeChangedEvent - The listener to remove.
    
    See Also:
    
    setLabelPreferredSize(ILabel, SizeD), addLabelPreferredSizeChangedListener(IEventHandler)
  - removeLabelRemovedListener
```
void removeLabelRemovedListener(IEventHandler<LabelEventArgs> labelRemovedEvent)
```
    Removes the given listener for the LabelRemoved event that occurs when a label has been removed from this graph instance.
    This event will also be triggered, prior to the removal of the owner of the label.
    
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in label removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the label removal that has triggered this event.
    
    Parameters:
    
    labelRemovedEvent - The listener to remove.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), GraphEditorInputMode.addLabelTextChangedListener(IEventHandler), addLabelRemovedListener(IEventHandler)
  - removeLabelStyleChangedListener
```
void removeLabelStyleChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,ILabelStyle>> labelStyleChangedEvent)
```
    Removes the given listener for the LabelStyleChanged event that occurs when a label style has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelStyleChangedEvent - The listener to remove.
    
    See Also:
    
    setStyle(ILabel, ILabelStyle), addLabelStyleChangedListener(IEventHandler)
  - removeLabelTagChangedListener
```
void removeLabelTagChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,Object>> labelTagChangedEvent)
```
    Removes the given listener for the LabelTagChanged event that occurs when the tag of a label has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelTagChangedEvent - The listener to remove.
    
    See Also:
    
    ITagOwner.getTag(), addLabelTagChangedListener(IEventHandler)
  - removeLabelTextChangedListener
```
void removeLabelTextChangedListener(IEventHandler<ItemChangedEventArgs<ILabel,String>> labelTextChangedEvent)
```
    Removes the given listener for the LabelTextChanged event that occurs when the text of a label has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    labelTextChangedEvent - The listener to remove.
    
    See Also:
    
    setLabelText(ILabel, String), addLabelTextChangedListener(IEventHandler)
  - removeNodeCreatedListener
```
void removeNodeCreatedListener(IEventHandler<ItemEventArgs<INode>> nodeCreatedEvent)
```
    Removes the given listener for the NodeCreated event that occurs when a node has been created.
    This event is intended to provide notification of low level changes in the graph structure. Please use the NodeCreated event if you are interested only in node creation events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the node creation that has triggered this event.
    
    Parameters:
    
    nodeCreatedEvent - The listener to remove.
    
    See Also:
    
    createNode(RectD, INodeStyle, Object), createNode(INode, RectD, INodeStyle, Object), createGroupNode(INode, RectD, INodeStyle, Object), GraphEditorInputMode.addNodeCreatedListener(IEventHandler), addNodeCreatedListener(IEventHandler)
  - removeNodeLayoutChangedListener
```
void removeNodeLayoutChangedListener(INodeLayoutChangedHandler nodeLayoutChangedEvent)
```
    Removes the given listener for the NodeLayoutChanged event that occurs when a node layout has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    nodeLayoutChangedEvent - The listener to remove.
    
    See Also:
    
    addNodeLayoutChangedListener(INodeLayoutChangedHandler)
  - removeNodeRemovedListener
```
void removeNodeRemovedListener(IEventHandler<NodeEventArgs> nodeRemovedEvent)
```
    Removes the given listener for the NodeRemoved event that occurs when a node has been removed.
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in node removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the node removal that has triggered this event.
    
    Parameters:
    
    nodeRemovedEvent - The listener to remove.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), addNodeRemovedListener(IEventHandler)
  - removeNodeStyleChangedListener
```
void removeNodeStyleChangedListener(IEventHandler<ItemChangedEventArgs<INode,INodeStyle>> nodeStyleChangedEvent)
```
    Removes the given listener for the NodeStyleChanged event that occurs when a node style has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    nodeStyleChangedEvent - The listener to remove.
    
    See Also:
    
    setStyle(INode, INodeStyle), addNodeStyleChangedListener(IEventHandler)
  - removeNodeTagChangedListener
```
void removeNodeTagChangedListener(IEventHandler<ItemChangedEventArgs<INode,Object>> nodeTagChangedEvent)
```
    Removes the given listener for the NodeTagChanged event that occurs when the tag of a node has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    nodeTagChangedEvent - The listener to remove.
    
    See Also:
    
    ITagOwner.getTag(), addNodeTagChangedListener(IEventHandler)
  - removeParentChangedListener
```
void removeParentChangedListener(IEventHandler<NodeEventArgs> parentChangedEvent)
```
    Removes the given listener for the ParentChanged event.
    Event that will be triggered if an node has been reparented in the model.
    
    Parameters:
    
    parentChangedEvent - The listener to remove.
    
    See Also:
    
    addParentChangedListener(IEventHandler)
  - removePortAddedListener
```
void removePortAddedListener(IEventHandler<ItemEventArgs<IPort>> portAddedEvent)
```
    Removes the given listener for the PortAdded event that occurs when a port has been added to this graph instance.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the port creation that has triggered this event.
    
    Parameters:
    
    portAddedEvent - The listener to remove.
    
    See Also:
    
    addPort(IPortOwner, IPortLocationModelParameter, IPortStyle, Object), createEdge(INode, INode, IEdgeStyle, Object), addPortAddedListener(IEventHandler)
  - removePortLocationParameterChangedListener
```
void removePortLocationParameterChangedListener(IEventHandler<ItemChangedEventArgs<IPort,IPortLocationModelParameter>> portLocationParameterChangedEvent)
```
    Removes the given listener for the PortLocationParameterChanged event that occurs when the location model parameter of a port has been changed.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    portLocationParameterChangedEvent - The listener to remove.
    
    See Also:
    
    setPortLocationParameter(IPort, IPortLocationModelParameter), addPortLocationParameterChangedListener(IEventHandler)
  - removePortRemovedListener
```
void removePortRemovedListener(IEventHandler<PortEventArgs> portRemovedEvent)
```
    Removes the given listener for the PortRemoved event that occurs when a port has been removed from its owner.
    This event will also be triggered prior to the removal of the corresponding owner of the port.
    
    This event is intended to provide notification of low level changes in the graph structure. Please use the DeletedItem event if you are interested only in port removal events that result from user interaction. Note:You may not modify the graph in the event handler for this event. Especially you may not prevent/undo the port removal that has triggered this event.
    
    Parameters:
    
    portRemovedEvent - The listener to remove.
    
    See Also:
    
    remove(IModelItem), GraphEditorInputMode.addDeletedItemListener(IEventHandler), addPortRemovedListener(IEventHandler)
  - removePortStyleChangedListener
```
void removePortStyleChangedListener(IEventHandler<ItemChangedEventArgs<IPort,IPortStyle>> portStyleChangedEvent)
```
    Removes the given listener for the PortStyleChanged event that occurs when a port style has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    portStyleChangedEvent - The listener to remove.
    
    See Also:
    
    setStyle(IPort, IPortStyle), addPortStyleChangedListener(IEventHandler)
  - removePortTagChangedListener
```
void removePortTagChangedListener(IEventHandler<ItemChangedEventArgs<IPort,Object>> portTagChangedEvent)
```
    Removes the given listener for the PortTagChanged event that occurs when the tag of a port has been replaced.
    This event is intended to provide notification of low level changes in the graph structure. Note:You may not modify the graph in the event handler for this event.
    
    Parameters:
    
    portTagChangedEvent - The listener to remove.
    
    See Also:
    
    ITagOwner.getTag(), addPortTagChangedListener(IEventHandler)
  - reverse
```
default void reverse(IEdge edge)
```
    Reverses an edge by setting source and target port to TargetPort and SourcePort.
    Also, this method will reverse the bends by clearing them and reinserting them in reverse order if there is more than one bend.
    
    Parameters:
    
    edge - The edge to reverse.
  - setBendLocation
```
void setBendLocation(IBend bend,
                     PointD location)
```
    Modifies the location of the given bend.
    
    Parameters:
    
    bend - the bend whose location is to be modified
    
    location - the new location of the bend
    
    See Also:
    
    addBend(IEdge, PointD, int)
  - setEdgeDefaults
```
void setEdgeDefaults(IEdgeDefaults value)
```
    Sets the defaults for normal edges.
    The settings that are obtained from the instance influence newly created elements only. Setting different defaults afterwards does not influence existing elements.
    
    Parameters:
    
    value - The EdgeDefaults to set.
    
    See Also:
    
    getEdgeDefaults()
  - setEdgePorts
```
void setEdgePorts(IEdge edge,
                  IPort sourcePort,
                  IPort targetPort)
```
    Sets the ports of the given edge to the new values.
    This will trigger an EdgePortsChanged event if source or target ports differ from the current ones. Both ports and the edge must belong to the current graph instance.
    
    Parameters:
    
    edge - The edge to change the ports.
    
    sourcePort - The new source port instance.
    
    targetPort - The new target port instance.
  - setGroupNodeDefaults
```
void setGroupNodeDefaults(INodeDefaults value)
```
    Sets the defaults for group nodes.
    
    Parameters:
    
    value - The GroupNodeDefaults to set.
    
    See Also:
    
    getGroupNodeDefaults()
  - setIsGroupNode
```
void setIsGroupNode(INode node,
                    boolean isGroupNode)
```
    Determines whether the given node should be considered a group node.
    Group nodes may have children but do not necessarily need to have one. Attempting to set a node to the non-group-node-status while it has children at the same time will result in an IllegalStateException.
    
    Throws:
    
    IllegalStateException - If node is the root or currently has children and isGroupNode is false.
    
    IllegalArgumentException - If node is not in this graph.
    
    Parameters:
    
    node - The node to set the group node status for.
    
    isGroupNode - Whether to make the node a group node.
    
    See Also:
    
    getChildren(INode), isGroupNode(INode)
  - setLabelLayoutParameter
```
void setLabelLayoutParameter(ILabel label,
                             ILabelModelParameter layoutParameter)
```
    Sets the label model parameter for the given label.
    
    Throws:
    
    IllegalArgumentException - If the layoutParameter cannot be used for this label.
    
    IllegalArgumentException - If the label does not belong to this graph.
    
    Parameters:
    
    label - The label.
    
    layoutParameter - The new parameter.
  - setLabelPreferredSize
```
void setLabelPreferredSize(ILabel label,
                           SizeD preferredSize)
```
    Sets the preferred size of the label.
    
    Parameters:
    
    label - The label.
    
    preferredSize - The new preferred size.
    
    See Also:
    
    ILabel.getPreferredSize()
  - setLabelText
```
void setLabelText(ILabel label,
                  String text)
```
    Sets the label text of the given label.
    
    Parameters:
    
    label - the label to modify
    
    text - the new text of the label
    
    See Also:
    
    ILabel.getText()
  - setNodeCenter
```
default void setNodeCenter(INode node,
                           PointD center)
```
    Sets the center of a node to the given world coordinates.
    This implementation delegates to setNodeLayout(INode, RectD)
    
    Parameters:
    
    node - The node to recenter.
    
    center - The new center coordinates of the node in the world coordinate system.
  - setNodeDefaults
```
void setNodeDefaults(INodeDefaults value)
```
    Sets the defaults for normal nodes.
    The settings that are obtained from the instance influence newly created elements only. Setting different defaults afterwards does not influence existing elements.
    
    Parameters:
    
    value - The NodeDefaults to set.
    
    See Also:
    
    getNodeDefaults()
  - setNodeLayout
```
void setNodeLayout(INode node,
                   RectD layout)
```
    Sets the layout of the given node to the new value.
    
    Parameters:
    
    node - a live node that belongs to this graph
    
    layout - The new layout of the node to assign to its Layout.
    
    See Also:
    
    INode.getLayout()
  - setParent
```
void setParent(INode node,
               INode parent)
```
    Sets the parent node for a given node.
    Use null as parent to make node a top-level node for this graph.
    
    Throws:
    
    IllegalArgumentException - If node is null.
    
    IllegalArgumentException - If node is not in this graph
    
    Parameters:
    
    node - The node to assign a new parent.
    
    parent - The parent group node to assign to node or null to make node a top-level node.
    
    See Also:
    
    getParent(INode)
  - setPortLocation
```
default void setPortLocation(IPort port,
                             PointD location)
```
    Convenience method that tries to set the absolute coordinates of the given port to the given values.
    For full control over the placement of the ports, the setPortLocationParameter(IPort, IPortLocationModelParameter) method should be used instead. This implementation will use the port's LocationParameter's Model to obtain a new IPortLocationModelParameter via the IPortLocationModel.createParameter(IPortOwner, PointD) method. This might result in the port using a different location, because the model might not support parameters that result in the given location. This will also trigger an invalidateDisplays() call.
    
    Parameters:
    
    port - The port to modify
    
    location - the new absolute coordinates of the port
    
    See Also:
    
    addPort(IPortOwner, IPortLocationModelParameter, IPortStyle, Object)
  - setPortLocationParameter
```
void setPortLocationParameter(IPort port,
                              IPortLocationModelParameter locationParameter)
```
    Sets a new IPortLocationModelParameter for the given port.
    
    Parameters:
    
    port - The port to modify
    
    locationParameter - the new parameter that determines the coordinates of the port
  - setRelativePortLocation
```
default void setRelativePortLocation(IPort port,
                                     PointD relativeLocation)
```
    Tries to set the location of the port relative to its owner if the owner is a node.
    If the port is not owned by a node that is part of this graph, this method will throw an IllegalArgumentException. This method will delegate to setPortLocation(IPort, PointD).
    
    Throws:
    
    IllegalArgumentException - If the port is not owned by a node
    
    Parameters:
    
    port - the port
    
    relativeLocation - the new coordinate offsets relative to the center of the node's Layout's center.
    
    See Also:
    
    INode.getLayout()
  - setStyle
```
void setStyle(IEdge edge,
              IEdgeStyle style)
```
    Assigns the given style instance by reference to the edge.
    Style instances can be shared.
    
    Parameters:
    
    edge - The edge that will be assigned the new style
    
    style - The style instance that will be assigned to the edge.
    
    See Also:
    
    IEdge.getStyle(), addEdgeStyleChangedListener(IEventHandler), VoidEdgeStyle.INSTANCE
  - setStyle
```
void setStyle(ILabel label,
              ILabelStyle style)
```
    Assigns the given style instance by reference to the label.
    Style instances can be shared.
    
    Parameters:
    
    label - The label that will be assigned the new style
    
    style - The style instance that will be assigned to the label.
    
    See Also:
    
    ILabel.getStyle(), addLabelStyleChangedListener(IEventHandler), VoidLabelStyle.INSTANCE
  - setStyle
```
void setStyle(INode node,
              INodeStyle style)
```
    Assigns the given style instance by reference to the node.
    Style instances can be shared.
    
    Parameters:
    
    node - The node that will be assigned the new style
    
    style - The style instance that will be assigned to the node.
    
    See Also:
    
    INode.getStyle(), addNodeStyleChangedListener(IEventHandler), VoidNodeStyle.INSTANCE
  - setStyle
```
void setStyle(IPort port,
              IPortStyle style)
```
    Assigns the given style instance by reference to the port.
    Style instances can be shared.
    
    Parameters:
    
    port - The port that will be assigned the new style
    
    style - The style instance that will be assigned to the port.
    
    See Also:
    
    IPort.getStyle(), addPortStyleChangedListener(IEventHandler), VoidPortStyle.INSTANCE
  - setUndoEngineEnabled
```
default void setUndoEngineEnabled(boolean enabled)
```
    Convenience method that enables or disables undo capabilities for this instance.
    If undo support is set to true, an instance of UndoEngine can be queried from this instance's ILookup method.
  - successors
```
default <T extends IPortOwner> IEnumerable<T> successors(Class<T> tType,
                                                         T portOwner)
```
    Enumerates the successors of a given IPortOwner.
    Successors are calculated by going through all Ports and inspecting the outgoing edges at these ports, collecting the TargetPort Owners.
    
    Type Parameters:
    
    T - The type of the IPortOwner
    
    Parameters:
    
    portOwner - The port owner.
    
    Returns:
    
    An enumerable over all successors.

Interface IGraph

Field Summary

Fields inherited from interface com.yworks.yfiles.graph.ILookup

Method Summary

Methods inherited from interface com.yworks.yfiles.graph.ILookup

Methods inherited from interface com.yworks.yfiles.graph.ITagOwner

Method Detail

addBend

addBend

addBendAddedListener

addBendLocationChangedListener

addBendRemovedListener

addBends

addBendTagChangedListener

addDisplaysInvalidatedListener

addEdgeCreatedListener

addEdgePortsChangedListener

addEdgeRemovedListener

addEdgeStyleChangedListener

addEdgeTagChangedListener

addGraphTagChangedListener

addIsGroupNodeChangedListener

addLabel

addLabel

addLabel

addLabel

addLabel

addLabelAddedListener

addLabelLayoutParameterChangedListener

addLabelPreferredSizeChangedListener

addLabelRemovedListener

addLabelStyleChangedListener

addLabelTagChangedListener

addLabelTextChangedListener

addNodeCreatedListener

addNodeLayoutChangedListener

addNodeRemovedListener

addNodeStyleChangedListener

addNodeTagChangedListener

addParentChangedListener

addPort

addPort

addPort

addPort

addPort

addPort

addPort

addPortAddedListener

addPortLocationParameterChangedListener

addPortRemovedListener

addPortStyleChangedListener

addPortTagChangedListener

addRelativePort

addUndoUnit

adjustGroupNodeLayout

adjustLabelPreferredSize

applyLayout

applyLayout

beginEdit

beginEdit

beginEdit

calculateLabelPreferredSize

calculateLabelPreferredSize

calculateLabelPreferredSize

calculateLabelPreferredSize

clear

clearBends

contains

createDefaultLabelLayoutParameter

createDefaultPortLocationParameter

createDefaultPortLocationParameter

createEdge

createEdge

createEdge

createEdge

createEdge

createEdge

createGroupNode

createGroupNode

createGroupNode