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

Class AbstractCellTree

java.lang.Object

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

com.google.gwt.user.client.ui.Widget

com.google.gwt.user.client.ui.Composite

com.google.gwt.user.cellview.client.AbstractCellTree

All Implemented Interfaces:

HasAttachHandlers, HasCloseHandlers<TreeNode>, HasOpenHandlers<TreeNode>, HasHandlers, HasKeyboardSelectionPolicy, EventListener, HasVisibility, IsRenderable, IsWidget

Direct Known Subclasses:

CellBrowser, CellTree

public abstract class AbstractCellTree
extends Composite
implements HasOpenHandlers<TreeNode>, HasCloseHandlers<TreeNode>, HasKeyboardSelectionPolicy

An abstract representation of a tree widget that renders items using Cells.

Nested Class Summary

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

UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled

Nested classes/interfaces inherited from interface com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy

HasKeyboardSelectionPolicy.KeyboardSelectionPolicy

Field Summary

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

DEBUG_ID_PREFIX

Constructor Summary

Constructors

Constructor	Description
AbstractCellTree(TreeViewModel viewModel)	Construct a new CellTree with the specified TreeViewModel and root value.

Method Summary

Modifier and Type	Method	Description
HandlerRegistration	addCloseHandler(CloseHandler<TreeNode> handler)	Adds a CloseEvent handler.
HandlerRegistration	addOpenHandler(OpenHandler<TreeNode> handler)	Adds an OpenEvent handler.
HasKeyboardSelectionPolicy.KeyboardSelectionPolicy	getKeyboardSelectionPolicy()	Get the HasKeyboardSelectionPolicy.KeyboardSelectionPolicy.
protected <T> TreeViewModel.NodeInfo<?>	getNodeInfo(T value)	Get the TreeViewModel.NodeInfo that will provide the information to retrieve and display the children of the specified value.
abstract TreeNode	getRootTreeNode()	Get the root TreeNode.
TreeViewModel	getTreeViewModel()	Get the TreeViewModel that backs this tree.
protected boolean	isKeyboardSelectionDisabled()	Check if keyboard selection is disabled.
protected boolean	isLeaf(Object value)	Check if the value is known to be a leaf node.
void	setKeyboardSelectionPolicy(HasKeyboardSelectionPolicy.KeyboardSelectionPolicy policy)	Set the HasKeyboardSelectionPolicy.KeyboardSelectionPolicy.

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

claimElement, getWidget, initializeClaimedElement, initWidget, isAttached, onAttach, onBrowserEvent, onDetach, render, render, resolvePotentialElement, setWidget

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

addAttachHandler, addBitlessDomHandler, addDomHandler, addHandler, asWidget, asWidgetOrNull, createHandlerManager, delegateEvent, doAttachChildren, doDetachChildren, fireEvent, getHandlerCount, getLayoutData, getParent, isOrWasAttached, onLoad, onUnload, removeFromParent, setLayoutData, sinkEvents, unsinkEvents

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, setElement, setElement, setHeight, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkBitlessEvent, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.gwt.event.shared.HasHandlers

fireEvent

Constructor Details

AbstractCellTree

public AbstractCellTree(TreeViewModel viewModel)

Construct a new CellTree with the specified TreeViewModel and root value.

Parameters:

viewModel - the TreeViewModel that backs the tree

Method Details

addCloseHandler

public HandlerRegistration addCloseHandler(CloseHandler<TreeNode> handler)

Description copied from interface: HasCloseHandlers

Adds a CloseEvent handler.

Specified by:

addCloseHandler in interface HasCloseHandlers<TreeNode>

Parameters:

handler - the handler

Returns:

the registration for the event

addOpenHandler

public HandlerRegistration addOpenHandler(OpenHandler<TreeNode> handler)

Description copied from interface: HasOpenHandlers

Adds an OpenEvent handler.

Specified by:

addOpenHandler in interface HasOpenHandlers<TreeNode>

Parameters:

handler - the handler

Returns:

the registration for the event

getKeyboardSelectionPolicy

public HasKeyboardSelectionPolicy.KeyboardSelectionPolicy getKeyboardSelectionPolicy()

Description copied from interface: HasKeyboardSelectionPolicy

Get the HasKeyboardSelectionPolicy.KeyboardSelectionPolicy.

Specified by:

getKeyboardSelectionPolicy in interface HasKeyboardSelectionPolicy

Returns:

the selection policy

See Also:

• HasKeyboardSelectionPolicy.setKeyboardSelectionPolicy(KeyboardSelectionPolicy)

getRootTreeNode

public abstract TreeNode getRootTreeNode()

Get the root TreeNode.

Returns:

the TreeNode at the root of the tree

getTreeViewModel

public TreeViewModel getTreeViewModel()

Get the TreeViewModel that backs this tree.

Returns:

the TreeViewModel

setKeyboardSelectionPolicy

public void setKeyboardSelectionPolicy(HasKeyboardSelectionPolicy.KeyboardSelectionPolicy policy)

Description copied from interface: HasKeyboardSelectionPolicy

Set the HasKeyboardSelectionPolicy.KeyboardSelectionPolicy.

Specified by:

setKeyboardSelectionPolicy in interface HasKeyboardSelectionPolicy

Parameters:

policy - the selection policy

See Also:

• HasKeyboardSelectionPolicy.getKeyboardSelectionPolicy()

getNodeInfo

protected <T> TreeViewModel.NodeInfo<?> getNodeInfo(T value)

Get the TreeViewModel.NodeInfo that will provide the information to retrieve and display the children of the specified value.

Parameters:

value - the value in the parent node

Returns:

the TreeViewModel.NodeInfo

isKeyboardSelectionDisabled

protected boolean isKeyboardSelectionDisabled()

Check if keyboard selection is disabled.

Returns:

true if disabled, false if enabled.

isLeaf

protected boolean isLeaf(Object value)

Check if the value is known to be a leaf node.

Parameters:

value - the value at the node

Returns:

true if the node is known to be a leaf node, false otherwise