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# Class Ext.tree.TreePanel

Package: | Ext.tree
Class: | TreePanel
Extends: | Tree
Defined In: | TreePanel.js

Properties - Methods - Events - Config Options

## Public Properties

Property | Defined By
--- | ---
| dragZone : Ext.tree.TreeDragZone | TreePanel
The dragZone used by this tree if drag is enabled
| dropZone : Ext.tree.TreeDropZone | TreePanel
The dropZone used by this tree if drop is enabled
| id : Object | TreePanel
Read-only. The id of the container element becomes this TreePanel's id.
| root : Node | Tree
The root node for this tree

## Public Methods

Method | Defined By
--- | ---
| TreePanel(`String/HTMLElement/Element el`, `Object config`) | TreePanel
| addEvents(`Object object`) : void | Observable
Copies any events from the passed object onto this object if they do not already exist. The passed object must also ...
| addListener(`String eventName`, `Function handler`, [`Object scope`], [`Object options`]) : void | Observable
Appends an event handler to this component
| collapseAll() : void | TreePanel
Collapse all nodes
| expandAll() : void | TreePanel
Expand all nodes
| expandPath(`String path`, [`String attr`], [`Function callback`]) : void | TreePanel
Expands a specified path in this TreePanel. A path can be retrieved from a node with Ext.data.Node.getPath
| fireEvent(`String eventName`, `Object... args`) : Boolean | Observable
Fires the specified event with the passed parameters (minus the event name).
| getEl() : void | TreePanel
Returns the container element for this TreePanel
| getLoader() : void | TreePanel
Returns the default TreeLoader for this TreePanel
| getNodeById(`String id`) : Node | Tree
Gets a node in this tree by its id
| getRootNode() : Node | Tree
Returns this root node for this tree
| getSelectionModel() : void | TreePanel
Returns the selection model used by this TreePanel
| hasListener(`String eventName`) : Boolean | Observable
Checks to see if this object is currently listening for a specified event
| on(`String eventName`, `Function handler`, [`Object options`]) : void | Observable
Appends an event handler to this element (shorthand for addListener)
| purgeListeners() : void | Observable
Removes all listeners for this object
| removeListener(`String eventName`, `Function handler`, [`Object scope`]) : void | Observable
Removes a listener
| render() : void | TreePanel
Trigger rendering of this TreePanel
| selectPath(`String path`, [`String attr`], [`Function callback`]) : void | TreePanel
Selects the node in this tree at the specified path. A path can be retrieved from a node with Ext.data.Node.getPath
| setRootNode(`Node node`) : Node | Tree
Sets the root node for this tree
| un(`String eventName`, `Function handler`, [`Object scope`]) : void | Observable
Removes a listener (shorthand for removeListener)

## Public Events

Event | Defined By
--- | ---
| append : (`Tree tree`, `Node parent`, `Node node`, `Number index`) | Tree
Fires when a new child node is appended to a node in this tree.
| beforeappend : (`Tree tree`, `Node parent`, `Node node`) | Tree
Fires before a new child is appended to a node in this tree, return false to cancel the append.
| beforechildrenrendered : (`Node node`) | TreePanel
Fires right before the child nodes for a node are rendered
| beforeclick : (`Node node`, `Ext.EventObject e`) | TreePanel
Fires before click processing on a node. Return false to cancel the default action.
| beforecollapse : (`Node node`, `Boolean deep`, `Boolean anim`) | TreePanel
Fires before a node is collapsed, return false to cancel.
| beforeexpand : (`Node node`, `Boolean deep`, `Boolean anim`) | TreePanel
Fires before a node is expanded, return false to cancel.
| beforeinsert : (`Tree tree`, `Node parent`, `Node node`, `Node refNode`) | Tree
Fires before a new child is inserted in a node in this tree, return false to cancel the insert.
| beforeload : (`Node node`) | TreePanel
Fires before a node is loaded, return false to cancel
| beforemove : (`Tree tree`, `Node node`, `Node oldParent`, `Node newParent`, `Number index`) | Tree
Fires before a node is moved to a new location in the tree. Return false to cancel the move.
| beforenodedrop : (`Object dropEvent`) | TreePanel
Fires when a DD object is dropped on a node in this tree for preprocessing. Return false to cancel the drop. The drop...
| beforeremove : (`Tree tree`, `Node parent`, `Node node`) | Tree
Fires before a child is removed from a node in this tree, return false to cancel the remove.
| click : (`Node node`, `Ext.EventObject e`) | TreePanel
Fires when a node is clicked
| collapse : (`Node node`) | TreePanel
Fires when a node is collapsed
| contextmenu : (`Node node`, `Ext.EventObject e`) | TreePanel
Fires when a node is right clicked
| dblclick : (`Node node`, `Ext.EventObject e`) | TreePanel
Fires when a node is double clicked
| disabledchange : (`Node node`, `Boolean disabled`) | TreePanel
Fires when the disabled status of a node changes
| dragdrop : (`Ext.tree.TreePanel this`, `Ext.tree.TreeNode node`, `DD dd`, `event e`) | TreePanel
Fires when a dragged node is dropped on a valid DD target
| enddrag : (`Ext.tree.TreePanel this`, `Ext.tree.TreeNode node`, `event e`) | TreePanel
Fires when a drag operation is complete
| expand : (`Node node`) | TreePanel
Fires when a node is expanded
| insert : (`Tree tree`, `Node parent`, `Node node`, `Node refNode`) | Tree
Fires when a new child node is inserted in a node in this tree.
| load : (`Node node`) | TreePanel
Fires when a node is loaded
| move : (`Tree tree`, `Node node`, `Node oldParent`, `Node newParent`, `Number index`) | Tree
Fires when a node is moved to a new location in the tree
| nodedragover : (`Object dragOverEvent`) | TreePanel
Fires when a tree node is being targeted for a drag drop, return false to signal drop not allowed. The dragOverEvent ...
| nodedrop : (`Object dropEvent`) | TreePanel
Fires after a DD object is dropped on a node in this tree. The dropEvent passed to handlers has the following propert...
| remove : (`Tree tree`, `Node parent`, `Node node`) | Tree
Fires when a child node is removed from a node in this tree.
| startdrag : (`Ext.tree.TreePanel this`, `Ext.tree.TreeNode node`, `event e`) | TreePanel
Fires when a node starts being dragged
| textchange : (`Node node`, `String text`, `String oldText`) | TreePanel
Fires when the text for a node is changed

## Config Options

Config Options | Defined By
--- | ---
| animate : Boolean | TreePanel
true to enable animated expand/collapse
| containerScroll : Boolean | TreePanel
true to register this container with ScrollManager
| ddAppendOnly : String | TreePanel
True if the tree should only allow append drops (use for trees which are sorted)
| ddGroup : String | TreePanel
The DD group this TreePanel belongs to
| ddScroll : Boolean | TreePanel
true to enable YUI body scrolling
| dragConfig : Object | TreePanel
Custom config to pass to the Ext.tree.TreeDragZone instance
| dropConfig : Object | TreePanel
Custom config to pass to the Ext.tree.TreeDropZone instance
| enableDD : Boolean | TreePanel
true to enable drag and drop
| enableDrag : Boolean | TreePanel
true to enable just drag
| enableDrop : Boolean | TreePanel
true to enable just drop
| hlColor : String | TreePanel
The color of the node highlight (defaults to C3DAF9)
| hlDrop : Boolean | TreePanel
false to disable node highlight on drop (defaults to true)
| lines : Boolean | TreePanel
false to disable tree lines (defaults to true)
| loader : Boolean | TreePanel
A TreeLoader for use with this TreePanel
| rootVisible : Boolean | TreePanel
false to hide the root node (defaults to true)
| selModel : Boolean | TreePanel
A tree selection model to use with this TreePanel (defaults to a Ext.tree.DefaultSelectionModel)
| singleExpand : Boolean | TreePanel
true if only 1 node per branch may be expanded

## Property Details

### dragZone

`public Ext.tree.TreeDragZone dragZone`
The dragZone used by this tree if drag is enabled
This property is defined by TreePanel.

### dropZone

`public Ext.tree.TreeDropZone dropZone`
The dropZone used by this tree if drop is enabled
This property is defined by TreePanel.

### id

`public Object id`
Read-only. The id of the container element becomes this TreePanel's id.
This property is defined by TreePanel.

### root

`public Node root`
The root node for this tree
This property is defined by Tree.

## Constructor Details

### TreePanel

`public function TreePanel(`String/HTMLElement/Element el`, `Object config`)`
Parameters:

- `el` : String/HTMLElement/Element
  The container element
- `config` : Object

## Method Details

### addEvents

`public function addEvents(`Object object`)`
Copies any events from the passed object onto this object if they do not already exist. The passed object must also inherit from Observable for this method to have any effect.
Parameters:

- `object` : Object
  The object from which to copy events

Returns:

- `void`

This method is defined by Observable.

### addListener

`public function addListener(`String eventName`, `Function handler`, [`Object scope`], [`Object options`])`
Appends an event handler to this component
Parameters:

- `eventName` : String
  The type of event to listen for
- `handler` : Function
  The method the event invokes
- `scope` : Object
  (optional) The scope in which to execute the handler function. The handler function's "this" context.
- `options` : Object
  (optional) An object containing handler configuration properties. This may contain any of the following properties:
  - scope {Object} The scope in which to execute the handler function. The handler function's "this" context.
  - delegate {String} A simple selector to filter the target or look for a descendant of the target
  - stopEvent {Boolean} True to stop the event. That is stop propagation, and prevent the default action.
  - preventDefault {Boolean} True to prevent the default action
  - stopPropagation {Boolean} True to prevent event propagation
  - normalized {Boolean} False to pass a browser event to the handler function instead of an Ext.EventObject
  - delay {Number} The number of milliseconds to delay the invocation of the handler after te event fires.
  - single {Boolean} True to add a handler to handle just the next firing of the event, and then remove itself.
  - buffer {Number} Causes the handler to be scheduled to run in an Ext.util.DelayedTask delayed by the specified number of milliseconds. If the event fires again within that time, the original handler is not invoked, but the new handler is scheduled in its place.

  Combining Options
  Using the options argument, it is possible to combine different types of listeners:
  A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId)

  Code:

      el.on('click', this.onClick, this, { single: true, delay: 100, stopEvent : true, forumId: 4 });

  The method also allows for a single argument to be passed which is a config object containing properties which specify multiple handlers.

  Attaching multiple handlers in 1 call
  Code:

      el.on({ 'click' : { fn: this.onClick scope: this, delay: 100 }, 'mouseover' : { fn: this.onMouseOver scope: this }, 'mouseout' : { fn: this.onMouseOut scope: this } });

  Or a shorthand syntax:
  Code:

      el.on({ 'click' : this.onClick, 'mouseover' : this.onMouseOver, 'mouseout' : this.onMouseOut scope: this });

Returns:

- `void`

This method is defined by Observable.

### collapseAll

`public function collapseAll()`
Collapse all nodes
Parameters:

- None.

Returns:

- `void`

This method is defined by TreePanel.

### expandAll

`public function expandAll()`
Expand all nodes
Parameters:

- None.

Returns:

- `void`

This method is defined by TreePanel.

### expandPath

`public function expandPath(`String path`, [`String attr`], [`Function callback`])`
Expands a specified path in this TreePanel. A path can be retrieved from a node with Ext.data.Node.getPath
Parameters:

- `path` : String
- `attr` : String
  (optional) The attribute used in the path (see Ext.data.Node.getPath for more info)
- `callback` : Function
  (optional) The callback to call when the expand is complete. The callback will be called with (bSuccess, oLastNode) where bSuccess is if the expand was successful and oLastNode is the last node that was expanded.

Returns:

- `void`

This method is defined by TreePanel.

### fireEvent

`public function fireEvent(`String eventName`, `Object... args`)`
Fires the specified event with the passed parameters (minus the event name).
Parameters:

- `eventName` : String
- `args` : Object...
  Variable number of parameters are passed to handlers

Returns:

- `Boolean`
  returns false if any of the handlers return false otherwise it returns true

This method is defined by Observable.

### getEl

`public function getEl()`
Returns the container element for this TreePanel
Parameters:

- None.

Returns:

- `void`

This method is defined by TreePanel.

### getLoader

`public function getLoader()`
Returns the default TreeLoader for this TreePanel
Parameters:

- None.

Returns:

- `void`

This method is defined by TreePanel.

### getNodeById

`public function getNodeById(`String id`)`
Gets a node in this tree by its id
Parameters:

- `id` : String

Returns:

- `Node`

This method is defined by Tree.

### getRootNode

`public function getRootNode()`
Returns this root node for this tree
Parameters:

- None.

Returns:

- `Node`

This method is defined by Tree.

### getSelectionModel

`public function getSelectionModel()`
Returns the selection model used by this TreePanel
Parameters:

- None.

Returns:

- `void`

This method is defined by TreePanel.

### hasListener

`public function hasListener(`String eventName`)`
Checks to see if this object is currently listening for a specified event
Parameters:

- `eventName` : String
  The name of the event to check for

Returns:

- `Boolean`
  True if the event is being listened for, else false

This method is defined by Observable.

### on

`public function on(`String eventName`, `Function handler`, [`Object options`])`
Appends an event handler to this element (shorthand for addListener)
Parameters:

- `eventName` : String
  The type of event to listen for
- `handler` : Function
  The method the event invokes
- `options` : Object
  (optional)

Returns:

- `void`

This method is defined by Observable.

### purgeListeners

`public function purgeListeners()`
Removes all listeners for this object
Parameters:

- None.

Returns:

- `void`

This method is defined by Observable.

### removeListener

`public function removeListener(`String eventName`, `Function handler`, [`Object scope`])`
Removes a listener
Parameters:

- `eventName` : String
  The type of event to listen for
- `handler` : Function
  The handler to remove
- `scope` : Object
  (optional) The scope (this object) for the handler

Returns:

- `void`

This method is defined by Observable.

### render

`public function render()`
Trigger rendering of this TreePanel
Parameters:

- None.

Returns:

- `void`

This method is defined by TreePanel.

### selectPath

`public function selectPath(`String path`, [`String attr`], [`Function callback`])`
Selects the node in this tree at the specified path. A path can be retrieved from a node with Ext.data.Node.getPath
Parameters:

- `path` : String
- `attr` : String
  (optional) The attribute used in the path (see Ext.data.Node.getPath for more info)
- `callback` : Function
  (optional) The callback to call when the selection is complete. The callback will be called with (bSuccess, oSelNode) where bSuccess is if the selection was successful and oSelNode is the selected node.

Returns:

- `void`

This method is defined by TreePanel.

### setRootNode

`public function setRootNode(`Node node`)`
Sets the root node for this tree
Parameters:

- `node` : Node

Returns:

- `Node`

This method is defined by Tree.

### un

`public function un(`String eventName`, `Function handler`, [`Object scope`])`
Removes a listener (shorthand for removeListener)
Parameters:

- `eventName` : String
  The type of event to listen for
- `handler` : Function
  The handler to remove
- `scope` : Object
  (optional) The scope (this object) for the handler

Returns:

- `void`

This method is defined by Observable.

## Event Details

### append

`public event append`
Fires when a new child node is appended to a node in this tree.
Subscribers will be called with the following parameters:

- `tree` : Tree
  The owner tree
- `parent` : Node
  The parent node
- `node` : Node
  The newly appended node
- `index` : Number
  The index of the newly appended node

This event is defined by Tree.

### beforeappend

`public event beforeappend`
Fires before a new child is appended to a node in this tree, return false to cancel the append.
Subscribers will be called with the following parameters:

- `tree` : Tree
  The owner tree
- `parent` : Node
  The parent node
- `node` : Node
  The child node to be appended

This event is defined by Tree.

### beforechildrenrendered

`public event beforechildrenrendered`
Fires right before the child nodes for a node are rendered
Subscribers will be called with the following parameters:

- `node` : Node
  The node

This event is defined by TreePanel.

### beforeclick

`public event beforeclick`
Fires before click processing on a node. Return false to cancel the default action.
Subscribers will be called with the following parameters:

- `node` : Node
  The node
- `e` : Ext.EventObject
  The event object

This event is defined by TreePanel.

### beforecollapse

`public event beforecollapse`
Fires before a node is collapsed, return false to cancel.
Subscribers will be called with the following parameters:

- `node` : Node
  The node
- `deep` : Boolean
- `anim` : Boolean

This event is defined by TreePanel.

### beforeexpand

`public event beforeexpand`
Fires before a node is expanded, return false to cancel.
Subscribers will be called with the following parameters:

- `node` : Node
  The node
- `deep` : Boolean
- `anim` : Boolean

This event is defined by TreePanel.

### beforeinsert

`public event beforeinsert`
Fires before a new child is inserted in a node in this tree, return false to cancel the insert.
Subscribers will be called with the following parameters:

- `tree` : Tree
  The owner tree
- `parent` : Node
  The parent node
- `node` : Node
  The child node to be inserted
- `refNode` : Node
  The child node the node is being inserted before

This event is defined by Tree.

### beforeload

`public event beforeload`
Fires before a node is loaded, return false to cancel
Subscribers will be called with the following parameters:

- `node` : Node
  The node being loaded

This event is defined by TreePanel.

### beforemove

`public event beforemove`
Fires before a node is moved to a new location in the tree. Return false to cancel the move.
Subscribers will be called with the following parameters:

- `tree` : Tree
  The owner tree
- `node` : Node
  The node being moved
- `oldParent` : Node
  The parent of the node
- `newParent` : Node
  The new parent the node is moving to
- `index` : Number
  The index it is being moved to

This event is defined by Tree.

### beforenodedrop

`public event beforenodedrop`
Fires when a DD object is dropped on a node in this tree for preprocessing. Return false to cancel the drop. The dropEvent passed to handlers has the following properties:

- tree - The TreePanel
- target - The node being targeted for the drop
- data - The drag data from the drag source
- point - The point of the drop - append, above or below
- source - The drag source
- rawEvent - Raw mouse event
- dropNode - Drop node(s) provided by the source OR you can supply node(s) to be inserted by setting them on this object.
- cancel - Set this to true to cancel the drop.

Subscribers will be called with the following parameters:

- `dropEvent` : Object

This event is defined by TreePanel.

### beforeremove

`public event beforeremove`
Fires before a child is removed from a node in this tree, return false to cancel the remove.
Subscribers will be called with the following parameters:

- `tree` : Tree
  The owner tree
- `parent` : Node
  The parent node
- `node` : Node
  The child node to be removed

This event is defined by Tree.

### click

`public event click`
Fires when a node is clicked
Subscribers will be called with the following parameters:

- `node` : Node
  The node
- `e` : Ext.EventObject
  The event object

This event is defined by TreePanel.

### collapse

`public event collapse`
Fires when a node is collapsed
Subscribers will be called with the following parameters:

- `node` : Node
  The node

This event is defined by TreePanel.

### contextmenu

`public event contextmenu`
Fires when a node is right clicked
Subscribers will be called with the following parameters:

- `node` : Node
  The node
- `e` : Ext.EventObject
  The event object

This event is defined by TreePanel.

### dblclick

`public event dblclick`
Fires when a node is double clicked
Subscribers will be called with the following parameters:

- `node` : Node
  The node
- `e` : Ext.EventObject
  The event object

This event is defined by TreePanel.

### disabledchange

`public event disabledchange`
Fires when the disabled status of a node changes
Subscribers will be called with the following parameters:

- `node` : Node
  The node
- `disabled` : Boolean

This event is defined by TreePanel.

### dragdrop

`public event dragdrop`
Fires when a dragged node is dropped on a valid DD target
Subscribers will be called with the following parameters:

- `this` : Ext.tree.TreePanel
- `node` : Ext.tree.TreeNode
- `dd` : DD
  The dd it was dropped on
- `e` : event
  The raw browser event

This event is defined by TreePanel.

### enddrag

`public event enddrag`
Fires when a drag operation is complete
Subscribers will be called with the following parameters:

- `this` : Ext.tree.TreePanel
- `node` : Ext.tree.TreeNode
- `e` : event
  The raw browser event

This event is defined by TreePanel.

### expand

`public event expand`
Fires when a node is expanded
Subscribers will be called with the following parameters:

- `node` : Node
  The node

This event is defined by TreePanel.

### insert

`public event insert`
Fires when a new child node is inserted in a node in this tree.
Subscribers will be called with the following parameters:

- `tree` : Tree
  The owner tree
- `parent` : Node
  The parent node
- `node` : Node
  The child node inserted
- `refNode` : Node
  The child node the node was inserted before

This event is defined by Tree.

### load

`public event load`
Fires when a node is loaded
Subscribers will be called with the following parameters:

- `node` : Node
  The node that was loaded

This event is defined by TreePanel.

### move

`public event move`
Fires when a node is moved to a new location in the tree
Subscribers will be called with the following parameters:

- `tree` : Tree
  The owner tree
- `node` : Node
  The node moved
- `oldParent` : Node
  The old parent of this node
- `newParent` : Node
  The new parent of this node
- `index` : Number
  The index it was moved to

This event is defined by Tree.

### nodedragover

`public event nodedragover`
Fires when a tree node is being targeted for a drag drop, return false to signal drop not allowed. The dragOverEvent passed to handlers has the following properties:

- tree - The TreePanel
- target - The node being targeted for the drop
- data - The drag data from the drag source
- point - The point of the drop - append, above or below
- source - The drag source
- rawEvent - Raw mouse event
- dropNode - Drop node(s) provided by the source.
- cancel - Set this to true to signal drop not allowed.

Subscribers will be called with the following parameters:

- `dragOverEvent` : Object

This event is defined by TreePanel.

### nodedrop

`public event nodedrop`
Fires after a DD object is dropped on a node in this tree. The dropEvent passed to handlers has the following properties:

- tree - The TreePanel
- target - The node being targeted for the drop
- data - The drag data from the drag source
- point - The point of the drop - append, above or below
- source - The drag source
- rawEvent - Raw mouse event
- dropNode - Dropped node(s).

Subscribers will be called with the following parameters:

- `dropEvent` : Object

This event is defined by TreePanel.

### remove

`public event remove`
Fires when a child node is removed from a node in this tree.
Subscribers will be called with the following parameters:

- `tree` : Tree
  The owner tree
- `parent` : Node
  The parent node
- `node` : Node
  The child node removed

This event is defined by Tree.

### startdrag

`public event startdrag`
Fires when a node starts being dragged
Subscribers will be called with the following parameters:

- `this` : Ext.tree.TreePanel
- `node` : Ext.tree.TreeNode
- `e` : event
  The raw browser event

This event is defined by TreePanel.

### textchange

`public event textchange`
Fires when the text for a node is changed
Subscribers will be called with the following parameters:

- `node` : Node
  The node
- `text` : String
  The new text
- `oldText` : String
  The old text

This event is defined by TreePanel.

## Config Details

### animate

`animate : Boolean`
true to enable animated expand/collapse
This config option is defined by TreePanel.

### containerScroll

`containerScroll : Boolean`
true to register this container with ScrollManager
This config option is defined by TreePanel.

### ddAppendOnly

`ddAppendOnly : String`
True if the tree should only allow append drops (use for trees which are sorted)
This config option is defined by TreePanel.

### ddGroup

`ddGroup : String`
The DD group this TreePanel belongs to
This config option is defined by TreePanel.

### ddScroll

`ddScroll : Boolean`
true to enable YUI body scrolling
This config option is defined by TreePanel.

### dragConfig

`dragConfig : Object`
Custom config to pass to the Ext.tree.TreeDragZone instance
This config option is defined by TreePanel.

### dropConfig

`dropConfig : Object`
Custom config to pass to the Ext.tree.TreeDropZone instance
This config option is defined by TreePanel.

### enableDD

`enableDD : Boolean`
true to enable drag and drop
This config option is defined by TreePanel.

### enableDrag

`enableDrag : Boolean`
true to enable just drag
This config option is defined by TreePanel.

### enableDrop

`enableDrop : Boolean`
true to enable just drop
This config option is defined by TreePanel.

### hlColor

`hlColor : String`
The color of the node highlight (defaults to C3DAF9)
This config option is defined by TreePanel.

### hlDrop

`hlDrop : Boolean`
false to disable node highlight on drop (defaults to true)
This config option is defined by TreePanel.

### lines

`lines : Boolean`
false to disable tree lines (defaults to true)
This config option is defined by TreePanel.

### loader

`loader : Boolean`
A TreeLoader for use with this TreePanel
This config option is defined by TreePanel.

### rootVisible

`rootVisible : Boolean`
false to hide the root node (defaults to true)
This config option is defined by TreePanel.

### selModel

`selModel : Boolean`
A tree selection model to use with this TreePanel (defaults to a Ext.tree.DefaultSelectionModel)
This config option is defined by TreePanel.

### singleExpand

`singleExpand : Boolean`
true if only 1 node per branch may be expanded
This config option is defined by TreePanel.

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