Package com.google.gwt.user.cellview.client

Class CellTreeNodeView<T>

java.lang.Object

com.google.gwt.user.client.ui.UIObject

com.google.gwt.user.cellview.client.CellTreeNodeView<T>

Type Parameters:

T - the type that this view contains

All Implemented Interfaces:

HasVisibility

class CellTreeNodeView<T>
extends UIObject

A view of a tree node.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	CellTreeNodeView.NodeCellList<C>	The HasData used to show children.
(package private) static interface	CellTreeNodeView.Template
(package private) static class	CellTreeNodeView.TreeNodeImpl	An implementation of TreeNode that delegates to a CellTreeNodeView.

Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject

UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled

Field Summary

Fields

Modifier and Type	Field	Description
(package private) CellTreeNodeView.NodeCellList<?>	listView	The list view used to display the nodes.

Fields inherited from class com.google.gwt.user.client.ui.UIObject

DEBUG_ID_PREFIX

Constructor Summary

Constructors

Constructor	Description
CellTreeNodeView(CellTree tree, CellTreeNodeView<?> parent, TreeViewModel.NodeInfo<T> parentNodeInfo, Element elem, T value, CellTree.CellTreeMessages messages)	Construct a CellTreeNodeView.

Method Summary

Modifier and Type	Method	Description
(package private) boolean	belongsToTree(CellTree tree)
protected void	cleanup(boolean destroy)	Unregister the list handler and destroy all child nodes.
protected boolean	consumeAnimate()
protected <C> CellTreeNodeView<C>	createTreeNodeView(TreeViewModel.NodeInfo<C> nodeInfo, Element childElem, C childValue, Object viewData)	Returns an instance of TreeNodeView of the same subclass as the calling object.
(package private) Element	ensureAnimationFrame()	Ensure that the animation frame exists and return it.
(package private) Element	ensureChildContainer()	Ensure that the child container exists and return it.
(package private) Element	ensureContentContainer()	Ensure that the content container exists and return it.
protected void	fireEventToCell(NativeEvent event)	Fire an event to the AbstractCell.
protected Element	getCellParent()	Returns the element that parents the cell contents of this node.
int	getChildCount()
CellTreeNodeView<?>	getChildNode(int childIndex)
protected Element	getImageElement()	Returns the element corresponding to the open/close image.
(package private) int	getIndex()	Return the index of this node in its parent.
(package private) CellTreeNodeView<?>	getParentNode()	Return the parent node, or null if this node is the root.
protected Element	getSelectionElement()	Returns the element that selection styles are applied to.
(package private) static Element	getSelectionElement(Element nodeElem)	Returns the element that selection is applied to.
(package private) Element	getShowMoreElement()
(package private) TreeNode	getTreeNode()	Get a TreeNode with a public API for this node view.
protected Object	getValueKey()	Returns the key for the value of this node using the parent's implementation of NodeInfo.getKey().
(package private) int	indexOf(CellTreeNodeView<?> child)
(package private) boolean	isDestroyed()
boolean	isLeaf()
boolean	isOpen()	Check whether or not this node is open.
(package private) boolean	isRootNode()	Check if this node is a root node.
(package private) boolean	isSelected()	Check if the value of this node is selected.
protected <C> void	onOpen(TreeViewModel.NodeInfo<C> nodeInfo)	Set up the node when it is opened.
(package private) boolean	resetFocusOnCell()	Reset focus on this node.
(package private) void	setKeyboardSelected(boolean selected, boolean stealFocus)	Select or deselect this node with the keyboard.
(package private) void	setKeyboardSelectedStyle(boolean selected)	Add or remove the keyboard selected style.
boolean	setOpen(boolean open, boolean fireEvents)	Sets whether this item's children are displayed.
(package private) void	setSelected(boolean selected)	Select or deselect this node.
(package private) void	showFewer()
(package private) void	showMore()

Methods inherited from class com.google.gwt.user.client.ui.UIObject

addStyleDependentName, addStyleName, ensureDebugId, ensureDebugId, ensureDebugId, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getStyleName, getStylePrimaryName, getStylePrimaryName, getTitle, isVisible, isVisible, onEnsureDebugId, removeStyleDependentName, removeStyleName, resolvePotentialElement, setElement, setElement, setHeight, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkBitlessEvent, sinkEvents, toString, unsinkEvents

Methods inherited from class java.lang.Object

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

Field Details

listView

CellTreeNodeView.NodeCellList<?> listView

The list view used to display the nodes.

Constructor Details

CellTreeNodeView

CellTreeNodeView(CellTree tree,
 CellTreeNodeView<?> parent,
 TreeViewModel.NodeInfo<T> parentNodeInfo,
 Element elem,
 T value,
 CellTree.CellTreeMessages messages)

Construct a CellTreeNodeView.

Parameters:

tree - the parent CellTreeNodeView

parent - the parent CellTreeNodeView

parentNodeInfo - the TreeViewModel.NodeInfo of the parent

elem - the outer element of this CellTreeNodeView

value - the value of this node

messages - translation messages

Method Details

getSelectionElement

static Element getSelectionElement(Element nodeElem)

Returns the element that selection is applied to.

Parameters:

nodeElem - the element that represents the node

Returns:

the cell parent within the node

getChildCount

public int getChildCount()

getChildNode

public CellTreeNodeView<?> getChildNode(int childIndex)

isLeaf

public boolean isLeaf()

isOpen

public boolean isOpen()

Check whether or not this node is open.

Returns:

true if open, false if closed

setOpen

public boolean setOpen(boolean open,
 boolean fireEvents)

Sets whether this item's children are displayed.

Parameters:

open - whether the item is open

fireEvents - true to fire events if the state changes

Returns:

true if successfully opened, false otherwise.

cleanup

protected void cleanup(boolean destroy)

Unregister the list handler and destroy all child nodes.

Parameters:

destroy - true to destroy this node

consumeAnimate

protected boolean consumeAnimate()

createTreeNodeView

protected <C> CellTreeNodeView<C> createTreeNodeView(TreeViewModel.NodeInfo<C> nodeInfo,
 Element childElem,
 C childValue,
 Object viewData)

Returns an instance of TreeNodeView of the same subclass as the calling object.

Type Parameters:

C - the data type of the node's children

Parameters:

nodeInfo - a NodeInfo object describing the child nodes

childElem - the DOM element used to parent the new TreeNodeView

childValue - the child's value

viewData - view data associated with the node

Returns:

a TreeNodeView of suitable type

fireEventToCell

protected void fireEventToCell(NativeEvent event)

Fire an event to the AbstractCell.

Parameters:

event - the native event

getCellParent

protected Element getCellParent()

Returns the element that parents the cell contents of this node.

getImageElement

protected Element getImageElement()

Returns the element corresponding to the open/close image.

Returns:

the open/close image element

getSelectionElement

protected Element getSelectionElement()

Returns the element that selection styles are applied to. The element includes the open/close image and the rendered value and spans the width of the tree.

Returns:

the selection element

getValueKey

protected Object getValueKey()

Returns the key for the value of this node using the parent's implementation of NodeInfo.getKey().

onOpen

protected <C> void onOpen(TreeViewModel.NodeInfo<C> nodeInfo)

Set up the node when it is opened.

Type Parameters:

C - the child data type of the node

Parameters:

nodeInfo - the TreeViewModel.NodeInfo that provides information about the child values

belongsToTree

boolean belongsToTree(CellTree tree)

ensureAnimationFrame

Element ensureAnimationFrame()

Ensure that the animation frame exists and return it.

Returns:

the animation frame

ensureChildContainer

Element ensureChildContainer()

Ensure that the child container exists and return it.

Returns:

the child container

ensureContentContainer

Element ensureContentContainer()

Ensure that the content container exists and return it.

Returns:

the content container

getIndex

int getIndex()

Return the index of this node in its parent.

getParentNode

CellTreeNodeView<?> getParentNode()

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

getShowMoreElement

Element getShowMoreElement()

getTreeNode

TreeNode getTreeNode()

Get a TreeNode with a public API for this node view.

Returns:

the TreeNode

indexOf

int indexOf(CellTreeNodeView<?> child)

isDestroyed

boolean isDestroyed()

isRootNode

boolean isRootNode()

Check if this node is a root node.

Returns:

true if a root node

isSelected

boolean isSelected()

Check if the value of this node is selected.

Returns:

true if selected, false if not

resetFocusOnCell

boolean resetFocusOnCell()

Reset focus on this node.

Returns:

true of the cell takes focus, false if not

setKeyboardSelected

void setKeyboardSelected(boolean selected,
 boolean stealFocus)

Select or deselect this node with the keyboard.

Parameters:

selected - true if selected, false if not

stealFocus - true to steal focus

setKeyboardSelectedStyle

void setKeyboardSelectedStyle(boolean selected)

Add or remove the keyboard selected style.

Parameters:

selected - true if selected, false if not

setSelected

void setSelected(boolean selected)

Select or deselect this node.

Parameters:

selected - true to select, false to deselect

showFewer

void showFewer()

showMore

void showMore()