y.layout.tree
Class LeafPlacer

java.lang.Object
  y.layout.tree.LeafPlacer

All Implemented Interfaces:

NodePlacer

public class LeafPlacer
extends java.lang.Object
implements NodePlacer

A LeafPlacer creates a SubtreeShape for a leaf node and routes its incoming edge at the target side.

Field Summary

Fields inherited from interface y.layout.tree.NodePlacer

DIRECTION_ANY, DIRECTION_EAST, DIRECTION_NONE, DIRECTION_NORTH, DIRECTION_SOUTH, DIRECTION_WEST

Constructor Summary

LeafPlacer()
Creates a new LeafPlacer instance with default settings.

Method Summary

Processor	createProcessor(GenericTreeLayouter layouter, LayoutGraph graph, Node currentRoot) Creates an optional Processor for pre- and post-processing.
void	determineChildConnectors(Node localRoot, DataMap connectorMap) Does nothing because leaf nodes don't have children so there are no child connectors.
GenericTreeLayouter.SubtreeShape	placeSubtree(DataProvider nodeShapeProvider, DataProvider subtreeShapeProvider, LayoutGraph graph, Node localRoot, byte parentConnectorDirection) Creates a GenericTreeLayouter.SubtreeShape for the local root node (a leaf node in this case) and adds target points to the incoming edge.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LeafPlacer

public LeafPlacer()

Creates a new LeafPlacer instance with default settings.

Method Detail

createProcessor

public Processor createProcessor(GenericTreeLayouter layouter,
                                 LayoutGraph graph,
                                 Node currentRoot)

Creates an optional Processor for pre- and post-processing.

This implementation returns null. Hence, no pre- or post-processing is done.

Specified by:

createProcessor in interface NodePlacer

Parameters:

layouter - the current GenericTreeLayouter instance

graph - the input graph

currentRoot - the root node handled by this NodePlacer

Returns:

null

determineChildConnectors

public void determineChildConnectors(Node localRoot,
                                     DataMap connectorMap)

Does nothing because leaf nodes don't have children so there are no child connectors.

Specified by:

determineChildConnectors in interface NodePlacer

Parameters:

localRoot - the local root node

connectorMap - the map that must be used for storing the direction specifiers of the child nodes

placeSubtree

public GenericTreeLayouter.SubtreeShape placeSubtree(DataProvider nodeShapeProvider,
                                                     DataProvider subtreeShapeProvider,
                                                     LayoutGraph graph,
                                                     Node localRoot,
                                                     byte parentConnectorDirection)

Creates a GenericTreeLayouter.SubtreeShape for the local root node (a leaf node in this case) and adds target points to the incoming edge.

The incoming edge is routed according to possibly assigned PortConstraints.

Specified by:

placeSubtree in interface NodePlacer

Parameters:

nodeShapeProvider - the DataProvider for obtaining an initial shape of the root node

subtreeShapeProvider - the DataProvider for accessing the pre-calculated shapes of the subtrees

graph - the input graph

localRoot - the root of the subtree that should be arranged by this method

parentConnectorDirection - the direction specifier for the connector of the local root node to its parent node

Returns:

the GenericTreeLayouter.SubtreeShape of the leaf node including the connector