com.google.gwt.user.cellview.client

Class CellTreeNodeView.TreeNodeImpl

java.lang.Object

com.google.gwt.user.cellview.client.CellTreeNodeView.TreeNodeImpl

All Implemented Interfaces:

TreeNode

Enclosing class:

CellTreeNodeView<T>

static class CellTreeNodeView.TreeNodeImpl
extends java.lang.Object
implements TreeNode

An implementation of TreeNode that delegates to a CellTreeNodeView. This class is intentionally static because we might move it to a new CellTreeNodeView, and we don't want non-static references to the old CellTreeNodeView.

Constructor Summary

Constructors

Constructor and Description
TreeNodeImpl(CellTreeNodeView<?> nodeView)

Method Summary

Modifier and Type	Method and Description
(package private) void	flush() Flush pending changes in the view.
int	getChildCount() Get the number of children of the node.
java.lang.Object	getChildValue(int index) Get the value associated with a child node.
int	getIndex() Get the index of the current node relative to its parent.
(package private) CellTreeNodeView<?>	getNodeView()
TreeNode	getParent() Get the parent node of this node.
java.lang.Object	getValue() Get the value associated with this node.
boolean	isChildLeaf(int index) Check whether or not a child node is a leaf node.
boolean	isChildOpen(int index) Check whether or not a child node is open.
boolean	isDestroyed() Check whether or not the current node is destroyed.
TreeNode	setChildOpen(int index, boolean open) Open or close a child node and fire an event.
TreeNode	setChildOpen(int index, boolean open, boolean fireEvents) Open or close the node, optionally firing an event.

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeNodeImpl

public TreeNodeImpl(CellTreeNodeView<?> nodeView)

Method Detail

getChildCount

public int getChildCount()

Description copied from interface: TreeNode

Get the number of children of the node.

Specified by:

getChildCount in interface TreeNode

Returns:

the child count

getChildValue

public java.lang.Object getChildValue(int index)

Description copied from interface: TreeNode

Get the value associated with a child node.

Specified by:

getChildValue in interface TreeNode

Parameters:

index - the child index

Returns:

the value

getIndex

public int getIndex()

Description copied from interface: TreeNode

Get the index of the current node relative to its parent.

Specified by:

getIndex in interface TreeNode

Returns:

the index of the current node

getNodeView

final CellTreeNodeView<?> getNodeView()

getParent

public TreeNode getParent()

Description copied from interface: TreeNode

Get the parent node of this node.

Specified by:

getParent in interface TreeNode

Returns:

the parent node, or null if this node is the root node

getValue

public java.lang.Object getValue()

Description copied from interface: TreeNode

Get the value associated with this node. This method can be called on destroyed nodes.

Specified by:

getValue in interface TreeNode

Returns:

the value

isChildLeaf

public boolean isChildLeaf(int index)

Description copied from interface: TreeNode

Check whether or not a child node is a leaf node.

Specified by:

isChildLeaf in interface TreeNode

Parameters:

index - the index of the child

Returns:

true if a leaf node, false if not

isChildOpen

public boolean isChildOpen(int index)

Description copied from interface: TreeNode

Check whether or not a child node is open.

Specified by:

isChildOpen in interface TreeNode

Parameters:

index - the index of the child

Returns:

true if open, false if closed

isDestroyed

public boolean isDestroyed()

Description copied from interface: TreeNode

Check whether or not the current node is destroyed. The node is destroyed when it is closed, even if it still appears in the tree as an unopened non-leaf node. Once a node is destroyed, calling most methods on the node results in an IllegalStateException.

Specified by:

isDestroyed in interface TreeNode

Returns:

true if destroyed, false if active

setChildOpen

public TreeNode setChildOpen(int index,
                             boolean open)

Description copied from interface: TreeNode

Open or close a child node and fire an event. If open is true and the TreeNode successfully opens, returns the child TreeNode. Delegates to TreeNode.setChildOpen(int,boolean, boolean).

Specified by:

setChildOpen in interface TreeNode

Parameters:

index - the index of the child

open - true to open, false to close

Returns:

the TreeNode that was opened, or null if the node was closed or could not be opened

setChildOpen

public TreeNode setChildOpen(int index,
                             boolean open,
                             boolean fireEvents)

Description copied from interface: TreeNode

Open or close the node, optionally firing an event. If open is true and the TreeNode successfully opens, returns the child TreeNode.

Specified by:

setChildOpen in interface TreeNode

Parameters:

index - the index of the child

open - true to open, false to flose

fireEvents - true to fire an event, false not to

Returns:

the TreeNode that was opened, or null if the node was closed or could not be opened

flush

void flush()

Flush pending changes in the view.