Class BalloonLayout<V,E>

java.lang.Object

edu.uci.ics.jung.algorithms.layout.TreeLayout<V,E>

edu.uci.ics.jung.algorithms.layout.BalloonLayout<V,E>

All Implemented Interfaces:

com.google.common.base.Function<V,Point2D>, Layout<V,E>, Function<V,Point2D>

public class BalloonLayout<V,E>
extends TreeLayout<V,E>

A Layout implementation that assigns positions to Tree or Forest vertices using associations with nested circles ("balloons"). A balloon is nested inside another balloon if the first balloon's subtree is a subtree of the second balloon's subtree.

Field Summary

Fields

Modifier and Type	Field	Description
protected com.google.common.cache.LoadingCache<V, PolarPoint>	polarLocations
protected Map<V,Double>	radii

Fields inherited from class TreeLayout

alreadyDone, basePositions, DEFAULT_DISTX, DEFAULT_DISTY, distX, distY, graph, locations, m_currentPoint, size

Constructor Summary

Constructors

Constructor	Description
BalloonLayout(Forest<V,E> g)	Creates an instance based on the input forest.

Method Summary

Modifier and Type	Method	Description
Point2D	apply(V v)
Point2D	getCenter(V v)
Map<V,Double>	getRadii()
void	setLocation(V v, Point2D location)	Changes the layout coordinates of v to location.
protected void	setPolars(List<V> kids, Point2D parentLocation, double parentRadius)
protected void	setRootPolar(V root)
protected void	setRootPolars()
void	setSize(Dimension size)	This method is not supported by this class.

Methods inherited from class TreeLayout

buildTree, buildTree, getCenter, getGraph, getSize, initialize, isLocked, lock, reset, setCurrentPositionFor, setGraph, setInitializer

Methods inherited from class Object

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

Methods inherited from interface com.google.common.base.Function

equals

Methods inherited from interface Function

andThen, compose

Field Details

polarLocations

protected com.google.common.cache.LoadingCache<V, PolarPoint> polarLocations

radii

protected Map<V,Double> radii

Constructor Details

BalloonLayout

public BalloonLayout(Forest<V,E> g)

Creates an instance based on the input forest.

Parameters:

g - the forest on which this layout will operate

Method Details

setRootPolars

protected void setRootPolars()

setRootPolar

protected void setRootPolar(V root)

setPolars

protected void setPolars(List<V> kids,
 Point2D parentLocation,
 double parentRadius)

setSize

public void setSize(Dimension size)

Description copied from class: TreeLayout

This method is not supported by this class. The size of the layout is determined by the topology of the tree, and by the horizontal and vertical spacing (optionally set by the constructor).

Specified by:

setSize in interface Layout<V,E>

Overrides:

setSize in class TreeLayout<V,E>

Parameters:

size - the space to use to lay out this graph

getCenter

public Point2D getCenter(V v)

Parameters:

v - the vertex whose center is to be returned

Returns:

the coordinates of v's parent, or the center of this layout's area if it's a root.

setLocation

public void setLocation(V v,
 Point2D location)

Description copied from interface: Layout

Changes the layout coordinates of v to location.

Specified by:

setLocation in interface Layout<V,E>

Overrides:

setLocation in class TreeLayout<V,E>

Parameters:

v - the vertex whose location is to be specified

location - the coordinates of the specified location

apply

public Point2D apply(V v)

Specified by:

apply in interface com.google.common.base.Function<V,E>

Specified by:

apply in interface Function<V,E>

Overrides:

apply in class TreeLayout<V,E>

getRadii

public Map<V,Double> getRadii()

Returns:

the radii