javax.swing.tree
Class VariableHeightLayoutCache.VisibleTreeStateNodeEnumeration

java.lang.Object
  javax.swing.tree.VariableHeightLayoutCache.VisibleTreeStateNodeEnumeration

All Implemented Interfaces:

Enumeration

Enclosing class:

VariableHeightLayoutCache

private class VariableHeightLayoutCache.VisibleTreeStateNodeEnumeration

extends Object

implements Enumeration

An enumerator to iterate through visible nodes.

Field Summary

protected int	childCount Number of children in parent.
protected int	nextIndex Index of next child.
protected VariableHeightLayoutCache.TreeStateNode	parent Parent thats children are being enumerated.

Constructor Summary

protected	VariableHeightLayoutCache.VisibleTreeStateNodeEnumeration(VariableHeightLayoutCache.TreeStateNode node)
protected	VariableHeightLayoutCache.VisibleTreeStateNodeEnumeration(VariableHeightLayoutCache.TreeStateNode parent, int startIndex)

Method Summary

protected boolean	findNextValidParent() Finds the next valid parent, this should be called when nextIndex is beyond the number of children of the current parent.
boolean	hasMoreElements() Tests if this enumeration contains more elements.
Object	nextElement() Returns the next element of this enumeration if this enumeration object has at least one more element to provide.
protected boolean	updateNextIndex() Updates nextIndex returning false if it is beyond the number of children of parent.
protected void	updateNextObject() Determines the next object by invoking updateNextIndex and if not succesful findNextValidParent.

Methods inherited from class java.lang.Object

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

Field Detail

parent

protected VariableHeightLayoutCache.TreeStateNode parent

Parent thats children are being enumerated.

nextIndex

protected int nextIndex

Index of next child. An index of -1 signifies parent should be visibled next.

childCount

protected int childCount

Number of children in parent.

Constructor Detail

VariableHeightLayoutCache.VisibleTreeStateNodeEnumeration

protected VariableHeightLayoutCache.VisibleTreeStateNodeEnumeration(VariableHeightLayoutCache.TreeStateNode node)

VariableHeightLayoutCache.VisibleTreeStateNodeEnumeration

protected VariableHeightLayoutCache.VisibleTreeStateNodeEnumeration(VariableHeightLayoutCache.TreeStateNode parent,
                                                                    int startIndex)

Method Detail

hasMoreElements

public boolean hasMoreElements()

Description copied from interface: Enumeration

Tests if this enumeration contains more elements.

Specified by:

hasMoreElements in interface Enumeration

Returns:

true if more visible nodes.

nextElement

public Object nextElement()

Description copied from interface: Enumeration

Returns the next element of this enumeration if this enumeration object has at least one more element to provide.

Specified by:

nextElement in interface Enumeration

Returns:

next visible TreePath.

updateNextObject

protected void updateNextObject()

Determines the next object by invoking updateNextIndex and if not succesful findNextValidParent.

findNextValidParent

protected boolean findNextValidParent()

Finds the next valid parent, this should be called when nextIndex is beyond the number of children of the current parent.

updateNextIndex

protected boolean updateNextIndex()

Updates nextIndex returning false if it is beyond the number of children of parent.