y.layout.hierarchic.incremental
Class TopologicalIncrementalLayerer

java.lang.Object
  y.layout.hierarchic.incremental.TopologicalIncrementalLayerer

All Implemented Interfaces:

Layerer

public class TopologicalIncrementalLayerer
extends java.lang.Object
implements Layerer

This class is a Layerer implementation that inserts nodes incrementally into an existing layer structure, without destroying the existing layout.

Nodes are inserted such that the length of backward pointing edges is minimized (not their number!). The method implemented will insert new layers into the current layering, if necessary, at locally optimal positions.

Constructor Summary

TopologicalIncrementalLayerer()
Creates a new instance of TopologicalIncrementalLayerer.

Method Summary

void	assignLayers(LayoutGraph graph, Layers layers, LayoutDataProvider ldp) Calculates an optimal layering for incremental nodes.
LayeredComponentsMerger	getLayeredComponentsMerger() Returns the LayeredComponentsMerger instance used for merging the layers of separate components into the current layering.
Layerer	getSeparateComponentsLayerer() Returns the Layerer instance used for the layering of separate components.
void	setLayeredComponentsMerger(LayeredComponentsMerger layeredComponentsMerger) Specifies the LayeredComponentsMerger instance used for merging the layers of separate components into the current layering.
void	setSeparateComponentsLayerer(Layerer separateComponentsLayerer) Specifies the Layerer instance used for the layering of separate components.

Methods inherited from class java.lang.Object

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

Constructor Detail

TopologicalIncrementalLayerer

public TopologicalIncrementalLayerer()

Creates a new instance of TopologicalIncrementalLayerer.

Method Detail

assignLayers

public void assignLayers(LayoutGraph graph,
                         Layers layers,
                         LayoutDataProvider ldp)

Calculates an optimal layering for incremental nodes.

Specified by:

assignLayers in interface Layerer

Parameters:

graph - the input graph

layers - the Layers instance that will be filled with the results of the calculation

ldp - the LayoutDataProvider used for querying information about the nodes and edges

See Also:

Layers.insert(byte, int), Layer.add(y.base.Node)

getSeparateComponentsLayerer

public Layerer getSeparateComponentsLayerer()

Returns the Layerer instance used for the layering of separate components.

Returns:

the Layerer instance used for layering the separate components

See Also:

setSeparateComponentsLayerer(Layerer)

setSeparateComponentsLayerer

public void setSeparateComponentsLayerer(Layerer separateComponentsLayerer)

Specifies the Layerer instance used for the layering of separate components.

Default Value:

The default value is OldLayererWrapper. An instance of OldLayererWrapper wrapping a WeightedLayerer will be used for the layering of separate components.

Parameters:

separateComponentsLayerer - the given Layerer instance for layering the separate components

Throws:

java.lang.IllegalArgumentException - if the specified Layerer is null

getLayeredComponentsMerger

public LayeredComponentsMerger getLayeredComponentsMerger()

Returns the LayeredComponentsMerger instance used for merging the layers of separate components into the current layering.

Returns:

the LayeredComponentsMerger instance used for merging the layers of separate components

See Also:

setLayeredComponentsMerger(LayeredComponentsMerger)

setLayeredComponentsMerger

public void setLayeredComponentsMerger(LayeredComponentsMerger layeredComponentsMerger)

Specifies the LayeredComponentsMerger instance used for merging the layers of separate components into the current layering.

Default Value:

The default value is DefaultLayeredComponentsMerger

Parameters:

layeredComponentsMerger - the given LayeredComponentsMerger instance

Throws:

java.lang.IllegalArgumentException - if the specified LayeredComponentsMerger is null