Package org.jungrapht.visualization.layout.util

Class RadiusVertexAccessor<V>

java.lang.Object

org.jungrapht.visualization.layout.util.RadiusVertexAccessor<V>

All Implemented Interfaces:

VertexAccessor<V>

Direct Known Subclasses:

RadiusGraphElementAccessor

public class RadiusVertexAccessor<V>
extends Object
implements VertexAccessor<V>

Simple implementation of PickSupport that returns the vertex or edge that is closest to the specified location. This implementation provides the same picking options that were available in previous versions of

No element will be returned that is farther away than the specified maximum distance.

Author:

Tom Nelson, Joshua O'Madadhain

Field Summary

Fields

Modifier and Type	Field	Description
protected double	maxDistance

Constructor Summary

Constructors

Constructor	Description
RadiusVertexAccessor()	Creates an instance with an effectively infinite default maximum distance.
RadiusVertexAccessor(double maxDistance)	Creates an instance with the specified default maximum distance.

Method Summary

Modifier and Type	Method	Description
V	getVertex(LayoutModel<V> layoutModel, double x, double y)	Gets the vertex nearest to the location of the (x,y) location selected, within a distance of this.maxDistance.
V	getVertex(LayoutModel<V> layoutModel, Point p)

Methods inherited from class java.lang.Object

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

Field Detail

maxDistance

protected double maxDistance

Constructor Detail

RadiusVertexAccessor

public RadiusVertexAccessor()

Creates an instance with an effectively infinite default maximum distance.

RadiusVertexAccessor

public RadiusVertexAccessor(double maxDistance)

Creates an instance with the specified default maximum distance.

Parameters:

maxDistance - the maximum distance at which any element can be from a specified location and still be returned

Method Detail

getVertex

public V getVertex(LayoutModel<V> layoutModel,
                   Point p)

Specified by:

getVertex in interface VertexAccessor<V>

Parameters:

layoutModel -

p - the pick point

Returns:

the vertex associated with location p

getVertex

public V getVertex(LayoutModel<V> layoutModel,
                   double x,
                   double y)

Gets the vertex nearest to the location of the (x,y) location selected, within a distance of this.maxDistance. Iterates through all visible vertices and checks their distance from the location. Override this method to provide a more efficient implementation.

Specified by:

getVertex in interface VertexAccessor<V>

Parameters:

x - the x coordinate of the location

y - the y coordinate of the location

Returns:

a vertex which is associated with the location (x,y) as given by layout