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

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

All Implemented Interfaces:

GraphLayoutEngine

public class HierarchicalLayout

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

HierarchicalLayout()

Method Summary

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.

Methods inherited from class java.lang.Object

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

Constructor Detail

HierarchicalLayout

public HierarchicalLayout()

Method Detail

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.