diva.graph.layout

Class LevelLayout.LevelData

java.lang.Object

diva.graph.layout.LevelLayout.LevelData

Enclosing class:

LevelLayout

public class LevelLayout.LevelData
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.Object	_copyGraph The local graph copy of the user's graph, to which dummy nodes/edges are added, and on which the actual layout is first performed before these values are copied back into the user's graph.
protected java.util.ArrayList[]	_levels A simple data structure to keep track of the levels.
protected int	_maxLevel A variable that is used to keep track of the maximum level in the graph, starting at -1 and then incremented as the level-finding algorithm is applied.
protected java.lang.Object	_meta A meta-node which is a dummy node that is added to the graph with edges to every other node in the graph in order to make it easier to perform a topological sort.
protected java.lang.Object	_origGraph The original graph that is passed in by the user on which the layout is eventually being assigned.
protected LayoutTarget	_target The layout target that is passed in by the user and used to assign the layout to the view.

Constructor Summary

Constructors

Constructor and Description
LevelData(LayoutTarget t, java.lang.Object composite)

Method Summary

Modifier and Type	Method and Description
int	getLevelCount()
int	getMaxLevelWidth(boolean withDummy) Each level contains a list of nodes that are in that level (level width).

Methods inherited from class java.lang.Object

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

Field Detail

_target

protected LayoutTarget _target

The layout target that is passed in by the user and used to assign the layout to the view.

_origGraph

protected java.lang.Object _origGraph

The original graph that is passed in by the user on which the layout is eventually being assigned.

_copyGraph

protected java.lang.Object _copyGraph

The local graph copy of the user's graph, to which dummy nodes/edges are added, and on which the actual layout is first performed before these values are copied back into the user's graph.

_maxLevel

protected int _maxLevel

A variable that is used to keep track of the maximum level in the graph, starting at -1 and then incremented as the level-finding algorithm is applied.

_levels

protected java.util.ArrayList[] _levels

A simple data structure to keep track of the levels. This is an array of array lists. Each array list represents a level in the graph and contains references to nodes in the graph.

_meta

protected java.lang.Object _meta

A meta-node which is a dummy node that is added to the graph with edges to every other node in the graph in order to make it easier to perform a topological sort.

Constructor Detail

LevelData

public LevelData(LayoutTarget t,
                 java.lang.Object composite)

Method Detail

getLevelCount

public int getLevelCount()

getMaxLevelWidth

public int getMaxLevelWidth(boolean withDummy)

Each level contains a list of nodes that are in that level (level width). This includes dummy nodes which are used as place holders in layout. If 'withDummy' is true, the method returns the most number of nodes including dummy nodes in a level. Otherwise, the method returns the most number of real nodes in a level.