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Class Ext.tree.DefaultSelectionModel

Package:Ext.tree
Class:DefaultSelectionModel
Extends:Observable
Defined In:TreeSelectionModel.js
The default single selection for a TreePanel.

Properties   -  Methods   -  Events

Public Properties

This class has no public properties.

Public Methods

Method Defined By
  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
  clearSelections() : void DefaultSelectionModel
Clear all selections
  fireEvent(String eventName, Object... args) : Boolean Observable
Fires the specified event with the passed parameters (minus the event name).
  getSelectedNode() : TreeNode DefaultSelectionModel
Get the selected node
  hasListener(String eventName) : Boolean Observable
Checks to see if this object is currently listening for a specified event
  isSelected(TreeNode node) : Boolean DefaultSelectionModel
Returns true if the node is selected
  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
  select(TreeNode node) : TreeNode DefaultSelectionModel
Select a node.
  selectNext() : TreeNode DefaultSelectionModel
Selects the node above the selected node in the tree, intelligently walking the nodes
  selectPrevious() : TreeNode DefaultSelectionModel
Selects the node above the selected node in the tree, intelligently walking the nodes
  un(String eventName, Function handler, [Object scope]) : void Observable
Removes a listener (shorthand for removeListener)
  unselect(TreeNode node) : void DefaultSelectionModel
Deselect a node.

Public Events

Event Defined By
  beforeselect : (DefaultSelectionModel this, TreeNode node, TreeNode node) DefaultSelectionModel
Fires before the selected node changes, return false to cancel the change
  selectionchange : (DefaultSelectionModel this, TreeNode node) DefaultSelectionModel
Fires when the selected node changes

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.

clearSelections

public function clearSelections()
Clear all selections
Parameters:
  • None.
Returns:
  • void
This method is defined by DefaultSelectionModel.

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.

getSelectedNode

public function getSelectedNode()
Get the selected node
Parameters:
  • None.
Returns:
  • TreeNode
    The selected node
This method is defined by DefaultSelectionModel.

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.

isSelected

public function isSelected(TreeNode node)
Returns true if the node is selected
Parameters:
  • node : TreeNode
    The node to check
Returns:
  • Boolean
This method is defined by DefaultSelectionModel.

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.

select

public function select(TreeNode node)
Select a node.
Parameters:
  • node : TreeNode
    The node to select
Returns:
  • TreeNode
    The selected node
This method is defined by DefaultSelectionModel.

selectNext

public function selectNext()
Selects the node above the selected node in the tree, intelligently walking the nodes
Parameters:
  • None.
Returns:
  • TreeNode
    The new selection
This method is defined by DefaultSelectionModel.

selectPrevious

public function selectPrevious()
Selects the node above the selected node in the tree, intelligently walking the nodes
Parameters:
  • None.
Returns:
  • TreeNode
    The new selection
This method is defined by DefaultSelectionModel.

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.

unselect

public function unselect(TreeNode node)
Deselect a node.
Parameters:
  • node : TreeNode
    The node to unselect
Returns:
  • void
This method is defined by DefaultSelectionModel.

Event Details

beforeselect

public event beforeselect
Fires before the selected node changes, return false to cancel the change
Subscribers will be called with the following parameters:
  • this : DefaultSelectionModel
  • node : TreeNode
    the new selection
  • node : TreeNode
    the old selection
This event is defined by DefaultSelectionModel.

selectionchange

public event selectionchange
Fires when the selected node changes
Subscribers will be called with the following parameters:
  • this : DefaultSelectionModel
  • node : TreeNode
    the new selection
This event is defined by DefaultSelectionModel.
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