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## com.google.gwt.user.cellview.client
Class CellBrowser.TreeNodeImpl<C>

    java.lang.Object
      com.google.gwt.user.cellview.client.CellBrowser.TreeNodeImpl<C>

Type Parameters:
  `C` - the data type of the children of the node

All Implemented Interfaces:
  TreeNode

Enclosing class:
  CellBrowser

     class CellBrowser.TreeNodeImpl<C>

extends java.lang.Object
implements TreeNode

A node in the tree.

Constructor Summary
`CellBrowser.TreeNodeImpl(TreeViewModel.NodeInfo<C> nodeInfo, java.lang.Object value, CellBrowser.BrowserCellList<C> display, Widget widget)` Construct a new `CellBrowser.TreeNodeImpl`.

Method Summary
`int` | `getChildCount()` Get the number of children of the node.
`C` | `getChildValue(int index)` Get the value associated with a child node.
`(package private) CellBrowser.BrowserCellList<C>` | `getDisplay()`
`(package private) java.lang.Object` | `getFocusedKey()` Return the key of the value that is focused in this node's display.
`int` | `getIndex()` Get the index of the current node relative to its parent.
`CellBrowser.TreeNodeImpl<?>` | `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.
`(package private) boolean` | `isFocusedOpen()` Return true if the focused value is open, false if not.
`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

### CellBrowser.TreeNodeImpl

    public CellBrowser.TreeNodeImpl(TreeViewModel.NodeInfo<C> nodeInfo,
                                    java.lang.Object value,
                                    CellBrowser.BrowserCellList<C> display,
                                    Widget widget)

  Construct a new `CellBrowser.TreeNodeImpl`.

  Parameters:
    `nodeInfo` - the nodeInfo for the children nodes
    `value` - the value of the node
    `display` - the display associated with the node
    `widget` - the widget that wraps the display

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 C 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

### getParent

    public CellBrowser.TreeNodeImpl<?> 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

### getDisplay

    CellBrowser.BrowserCellList<C> getDisplay()

### getFocusedKey

    java.lang.Object getFocusedKey()

  Return the key of the value that is focused in this node's display.

### isFocusedOpen

    boolean isFocusedOpen()

  Return true if the focused value is open, false if not.

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