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

java.lang.Object
  extended by com.google.gwt.user.client.ui.UIObject
      extended by com.google.gwt.user.client.ui.Widget
          extended by com.google.gwt.user.client.ui.Composite
              extended by 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
AbstractCellTree(TreeViewModel viewModel)
          Construct a new CellTree with the specified TreeViewModel and root value.
 
Method Summary
 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(java.lang.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 Detail

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 Detail

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(java.lang.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
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