org.opennms.features.topology.app.internal.jung

Class HierarchyLayout<V,E>

java.lang.Object

org.opennms.features.topology.app.internal.jung.HierarchyLayout<V,E>

Type Parameters:

V -

E -

All Implemented Interfaces:

edu.uci.ics.jung.algorithms.layout.Layout<V,E>, org.apache.commons.collections15.Transformer<V,Point2D>

public class HierarchyLayout<V,E>
extends Object
implements edu.uci.ics.jung.algorithms.layout.Layout<V,E>

A custom layout to be able to draw a hierarchy. This implementation is inspired by TreeLayout, which only works if 2 parents do not have the same child (see TreeUtils.getRoots(Forest)).

Constructor Summary

Constructors

Constructor and Description
HierarchyLayout(edu.uci.ics.jung.graph.Graph<V,E> g, int distx, int disty) Creates an instance for the specified graph, X distance, and Y distance.

Method Summary

Modifier and Type	Method and Description
edu.uci.ics.jung.graph.Graph<V,E>	getGraph()
Dimension	getSize()
void	horizontalSqueeze(List<V> vertices) Shifts the vertices horizontally ensuring that there is no more than "distx" units between each column of vertices.
void	initialize()
boolean	isLocked(V v)
void	lock(V v, boolean state)
void	reset()
void	setGraph(edu.uci.ics.jung.graph.Graph<V,E> graph)
void	setInitializer(org.apache.commons.collections15.Transformer<V,Point2D> initializer)
void	setLocation(V v, Point2D location)
void	setSize(Dimension d)
Point2D	transform(V v)

Methods inherited from class java.lang.Object

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

Constructor Detail

HierarchyLayout

public HierarchyLayout(edu.uci.ics.jung.graph.Graph<V,E> g,
                       int distx,
                       int disty)

Creates an instance for the specified graph, X distance, and Y distance.

Method Detail

horizontalSqueeze

public void horizontalSqueeze(List<V> vertices)

Shifts the vertices horizontally ensuring that there is no more than "distx" units between each column of vertices. The resulting layout is a denser visual that maintains the existing structure of the original layout. For the purposes of this algorithm, vertices with the same value of the X coordinate are deemed to be in the same "column".

Parameters:

vertices - list of vertices that will be displayed

getGraph

public edu.uci.ics.jung.graph.Graph<V,E> getGraph()

Specified by:

getGraph in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

getSize

public Dimension getSize()

Specified by:

getSize in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

initialize

public void initialize()

Specified by:

initialize in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

isLocked

public boolean isLocked(V v)

Specified by:

isLocked in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

lock

public void lock(V v,
                 boolean state)

Specified by:

lock in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

reset

public void reset()

Specified by:

reset in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

setSize

public void setSize(Dimension d)

Specified by:

setSize in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

setGraph

public void setGraph(edu.uci.ics.jung.graph.Graph<V,E> graph)

Specified by:

setGraph in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

setInitializer

public void setInitializer(org.apache.commons.collections15.Transformer<V,Point2D> initializer)

Specified by:

setInitializer in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

setLocation

public void setLocation(V v,
                        Point2D location)

Specified by:

setLocation in interface edu.uci.ics.jung.algorithms.layout.Layout<V,E>

transform

public Point2D transform(V v)

Specified by:

transform in interface org.apache.commons.collections15.Transformer<V,Point2D>