Package com.yworks.yfiles.layout.tree

Provides tree layout style algorithms.

See: Description

Interface Summary

Interface	Description
IFromSketchNodePlacer	A IFromSketchNodePlacer arranges the subtrees while taking the initial locations of the nodes into account.
INodePlacer	A INodePlacer is responsible for the arrangement of a local root node and all of its subtrees.
IPortAssignment	A IPortAssignment places the ports of edges connecting to the same node.
IProcessor	A IProcessor provides the possibility for each INodePlacer to prepare (and clean up) the graph for the children of the local root.

Class Summary

Class	Description
AbstractNodePlacer	Abstract base class for implementations of the INodePlacer interface.
AbstractRotatableNodePlacer	Abstract base class for INodePlacers that support rotations of the subtrees.
AbstractRotatableNodePlacer.Matrix	A matrix describes the rotation of the subtree handled by AbstractRotatableNodePlacer.
AbstractRotatableNodePlacer.RootAlignment	A RootAlignment describes how a local root node is arranged in relation to its children.
AspectRatioNodePlacer	This INodePlacer places the subtrees such that the overall aspect ratio of the arranged subtree will be close to a preferred aspect ratio.
AspectRatioTreeLayout	The AspectRatioTreeLayout arranges tree graphs in a compact fashion.
AspectRatioTreeLayoutData	Specifies custom data for the AspectRatioTreeLayout.
AssistantNodePlacer	The AssistantNodePlacer places nodes that are marked as assistants left and right of their parents and all other nodes below the assistant nodes.
BalloonLayout	A tree layout algorithm that arranges the subtrees of the tree in a balloon-like fashion.
BalloonLayout.NodeInfo	Encapsulates information bound to a node while the algorithm calculates a layout.
BalloonLayoutData	Specifies custom data for the BalloonLayout.
BusNodePlacer	The BusNodePlacer creates a bus to which all child nodes and the local root node are connected.
ClassicTreeLayout	This layout algorithm arranges graphs with a tree structure.
DefaultNodePlacer	DefaultNodePlacer is the default implementation of interface INodePlacer.
DefaultPortAssignment	The DefaultPortAssignment provides some simple port assignment styles.
DelegatingNodePlacer	DelegatingNodePlacer delegates the arrangement of the children to two different INodePlacers.
DendrogramNodePlacer	The DendrogramNodePlacer arranges subtrees as dendrograms.
DoubleLineNodePlacer	The DoubleLineNodePlacer arranges the children of a local root alternating in two lines.
FreeNodePlacer	A FreeNodePlacer is a simple pseudo-placer.
GridNodePlacer	The GridNodePlacer arranges the shapes of the children of a local root in a grid.
GroupedNodePlacer	This INodePlacer places the children of a local root in groups.
LayeredNodePlacer	A LayeredNodePlacer arranges the nodes of a subtree respecting layers.
LeafNodePlacer	A LeafNodePlacer creates a SubtreeShape for a leaf node and routes its incoming edge at the target side.
LeftRightNodePlacer	The LeftRightNodePlacer arranges the children in a subtree on the left and the right of a vertical bus.
MultiParentDescriptor	The MultiParentDescriptor provides style information for multi-parent structures.
NodeOrderComparator	The NodeOrderComparator compares edges according to a specified order.
RotatedSubtreeShape	Decorates a SubtreeShape and provides rotated access on it.
SimpleNodePlacer	The SimpleNodePlacer arranges all children of a local root in a single row.
TreeComponentLayout	The TreeComponentLayout arranges tree-like subgraph structures in a mixed layout style.
TreeLayout	This layout algorithm arranges graphs with a tree structure.
TreeLayout.SubtreeShape	A TreeLayout.SubtreeShape represents the position and the borders of a subtree.
TreeLayoutData	Specifies custom data for the TreeLayout.
TreeReductionStage	The TreeReductionStage temporarily reduces general graphs to trees.
TreeReductionStageData	Specifies custom data for the TreeReductionStage.

Enum Summary

Enum	Description
BorderLineSide	Side constant that defines the index of the eastern border line.
ChildAlignmentPolicy
ChildOrderingPolicy
ChildPlacement
ConnectorDirection	A direction constant that describes that the last connector segment points up.
EdgeRoutingStyle
FillStyle
InterleavedMode
LayeredRoutingStyle
LeafPlacement
MultiParentRoutingStyle
NodeLabelingPolicy
ParentConnectorDirection
PortAssignmentMode
PortStyle
RootAlignment
RootNodePolicy
RootPlacement
RoutingStyle
SubtreeArrangement	A direction specifier for placing the child nodes next to each other in direction of the actual layout orientation, with the edges connecting in the direction of flow.

Package com.yworks.yfiles.layout.tree Description

Provides tree layout style algorithms.

Implementations support radial layout of (sub)trees, compact layout obeying a given aspect ratio, and also horizontal/vertical layout of directed (and undirected) trees.

Class ClassicTreeLayout arranges directed and undirected trees in a main layout direction.

Class TreeLayout enables the use of INodePlacer implementations which are invoked to arrange the subtrees. Predefined node placers that inherit from abstract class AbstractRotatableNodePlacer allow for rotating subtrees.
Note that TreeLayout can be used to emulate the results generated by ClassicTreeLayout.

Example graphs

Default tree layout

Balloon layout

Dendrogram layout

General graph, non-tree edges are marked

Related Documentation

See the yFiles Developer's Guide section on Tree Layout for descriptions of the yFiles tree layout style algorithms.

The section Generic Tree Layout extensively discusses the advanced capabilities of class TreeLayout and also its numerous INodePlacer implementations.