org.globus.cog.gui.grapheditor.canvas.views.layouts
Class ExtendedSpringLayout

java.lang.Object
  org.globus.cog.gui.grapheditor.canvas.views.layouts.ExtendedSpringLayout

All Implemented Interfaces:

GraphLayoutEngine

public class ExtendedSpringLayout

extends Object

implements GraphLayoutEngine

Adds distribution of edges around the node so they tend to have equal angles between them. Incoming edges will be coming from above, while outgoing edges will go downwards. The behaviour can be easily reversed by turning your monitor upside-down

Constructor Summary

ExtendedSpringLayout()

Method Summary

void	dampen(Point p)
Hashtable	layoutGraph(GraphInterface graph, Hashtable fixedNodes) This method takes a graph and a Hashtable with the nodes that cannot be moved and returns a Hashtable with the coordinates of the nodes after doing the layout.
void	setAngularSpringConstant(double ak)
void	setDampeningFactor(double visc)
void	setPreferredEdgeLength(double len)
void	setRepulsionConstant(double rk)
void	setRepulsionDistance(double c)
void	setSpringConstant(double k)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtendedSpringLayout

public ExtendedSpringLayout()

Method Detail

setPreferredEdgeLength

public void setPreferredEdgeLength(double len)

setRepulsionDistance

public void setRepulsionDistance(double c)

setSpringConstant

public void setSpringConstant(double k)

setRepulsionConstant

public void setRepulsionConstant(double rk)

setAngularSpringConstant

public void setAngularSpringConstant(double ak)

setDampeningFactor

public void setDampeningFactor(double visc)

layoutGraph

public Hashtable layoutGraph(GraphInterface graph,
                             Hashtable fixedNodes)

Description copied from interface: GraphLayoutEngine

This method takes a graph and a Hashtable with the nodes that cannot be moved and returns a Hashtable with the coordinates of the nodes after doing the layout.

Specified by:

layoutGraph in interface GraphLayoutEngine

Parameters:

graph - The graph that needs to be layed out

fixedNodes - A Hashtable containing Node objects as keys, and Points as elements, which specify the coordinates of the non-movable nodes

Returns:

a Hashtable with Node objects as keys and Point objects as coordinates for the nodes.

dampen

public void dampen(Point p)