Mixins
This class is used as a container for a series of nodes. The nodes themselves maintain +the relationship between parent/child. The tree itself acts as a manager. It gives functionality +to retrieve a node by its identifier: getNodeById.
+ +The tree also relays events from any of it's child nodes, allowing them to be handled in a +centralized fashion. In general this class is not used directly, rather used internally +by other parts of the framework.
+(optional)
A config object containing one or more event handlers to be added to this +object during initialization. This should be a valid listeners config object as specified in the +addListener example for attaching multiple handlers at once.
+ +DOM events from ExtJs Components
+ + +While some ExtJs Component classes export selected DOM events (e.g. "click", "mouseover" etc), this + + +
is usually only done when extra value can be added. For example the DataView's
+click event passing the node clicked on. To access DOM
+events directly from a child element of a Component, we need to specify the element option to
+identify the Component property to add a DOM listener to:
new Ext.panel.Panel({
+ width: 400,
+ height: 200,
+ dockedItems: [{
+ xtype: 'toolbar'
+ }],
+ listeners: {
+ click: {
+ element: 'el', //bind to the underlying el property on the panel
+ fn: function(){ console.log('click el'); }
+ },
+ dblclick: {
+ element: 'body', //bind to the underlying body property on the panel
+ fn: function(){ console.log('dblclick body'); }
+ }
+ }
+});
+Adds the specified events to the list of events which this Observable may fire.
+Adds the specified events to the list of events which this Observable may fire.
+Either an object with event names as properties with a value of true
+or the first event name string if multiple event names are being passed as separate parameters.
[additional] Optional additional event names if multiple event names are being passed as separate parameters. +Usage:
+ +this.addEvents('storeloaded', 'storecleared');
+Appends an event handler to this object.
+Appends an event handler to this object.
+The name of the event to listen for. May also be an object who's property names are event names. See
+The method the event invokes.
+(optional) The scope (this reference) in which the handler function is executed.
+If omitted, defaults to the object which fired the event.
(optional) An object containing handler configuration. +properties. This may contain any of the following properties:
this reference) in which the handler function is executed.
+If omitted, defaults to the object which fired the event.This option is useful during Component construction to add DOM event listeners to elements of Components which +will exist only after the Component is rendered. For example, to add a click listener to a Panel's body: +
new Ext.panel.Panel({
+ title: 'The title',
+ listeners: {
+ click: this.handlePanelClick,
+ element: 'body'
+ }
+});
+When added in this way, the options available are the options applicable to Ext.core.Element.addListener
+ + +
+Combining Options
+Using the options argument, it is possible to combine different types of listeners:
+
+A delayed, one-time listener.
+
myPanel.on('hide', this.handleClick, this, {
+single: true,
+delay: 100
+});
+Attaching multiple handlers in 1 call
+The method also allows for a single argument to be passed which is a config object containing properties
+which specify multiple events. For example:
+
myGridPanel.on({
+ cellClick: this.onCellClick,
+ mouseover: this.onMouseOver,
+ mouseout: this.onMouseOut,
+ scope: this // Important. Ensure "this" is correct during handler execution
+});
++ +
Adds listeners to any Observable object (or Element) which are automatically removed when this Component +is destroyed. + +
Adds listeners to any Observable object (or Element) which are automatically removed when this Component +is destroyed. + +
The item to which to add a listener/listeners.
+The event name, or an object containing event name properties.
+Optional. If the ename parameter was an event name, this
+is the handler function.
Optional. If the ename parameter was an event name, this
+is the scope (this reference) in which the handler function is executed.
Optional. If the ename parameter was an event name, this
+is the addListener options.
Starts capture on the specified Observable. All events will be passed +to the supplied function with the event name + standard signature of the event +before the event is fired. If the supplied function returns false, +the event will not fire.
+The Observable to capture events from.
+The function to call when an event is fired.
+(optional) The scope (this reference) in which the function is executed. Defaults to the Observable firing the event.
Removes all listeners for this object including the managed listeners
+Removes all listeners for this object including the managed listeners
+Removes all managed listeners for this object.
+Removes all managed listeners for this object.
+Enables events fired by this Observable to bubble up an owner hierarchy by calling
+this.getBubbleTarget() if present. There is no implementation in the Observable base class.
This is commonly used by Ext.Components to bubble events to owner Containers. See Ext.Component.getBubbleTarget. The default +implementation in Ext.Component returns the Component's immediate owner. But if a known target is required, this can be overridden to +access the required target more quickly.
+ + +Example:
+ + +Ext.override(Ext.form.field.Base, {
+// Add functionality to Field's initComponent to enable the change event to bubble
+initComponent : Ext.Function.createSequence(Ext.form.field.Base.prototype.initComponent, function() {
+ this.enableBubble('change');
+}),
+
+// We know that we want Field's events to bubble directly to the FormPanel.
+getBubbleTarget : function() {
+ if (!this.formPanel) {
+ this.formPanel = this.findParentByType('form');
+ }
+ return this.formPanel;
+}
+});
+
+var myForm = new Ext.formPanel({
+title: 'User Details',
+items: [{
+ ...
+}],
+listeners: {
+ change: function() {
+ // Title goes red if form has been modified.
+ myForm.header.setStyle('color', 'red');
+ }
+}
+});
+The event name to bubble, or an Array of event names.
+Fires the specified event with the passed parameters (minus the event name).
+ + +An event may be set to bubble up an Observable parent hierarchy (See Ext.Component.getBubbleTarget) +by calling enableBubble.
+ +The name of the event to fire.
+Variable number of parameters are passed to handlers.
+returns false if any of the handlers return false otherwise it returns true.
+Gets a node in this tree by its id.
+Gets a node in this tree by its id.
+The match node.
+Returns the root node for this tree.
+Returns the root node for this tree.
+Checks to see if this object has any listeners for a specified event
+Checks to see if this object has any listeners for a specified event
+The name of the event to check for
+True if the event is being listened for, else false
+Sets observability on the passed class constructor.
+ +This makes any event fired on any instance of the passed class also fire a single event through +the class allowing for central handling of events on many instances at once.
+ +Usage:
+ +Ext.util.Observable.observe(Ext.data.Connection);
+Ext.data.Connection.on('beforerequest', function(con, options) {
+ console.log('Ajax request made to ' + options.url);
+});
+The class constructor to make observable.
+An object containing a series of listeners to add. See addListener.
+Appends an event handler to this object (shorthand for addListener.)
+Appends an event handler to this object (shorthand for addListener.)
+The type of event to listen for
+The method the event invokes
+(optional) The scope (this reference) in which the handler function is executed.
+If omitted, defaults to the object which fired the event.
(optional) An object containing handler configuration.
+Relays selected events from the specified Observable as if the events were fired by this.
Relays selected events from the specified Observable as if the events were fired by this.
The Observable whose events this object is to relay.
+Array of event names to relay.
+Removes all added captures from the Observable.
+Removes all added captures from the Observable.
+The Observable to release
+Removes an event handler.
+Removes an event handler.
+The type of event the handler was associated with.
+The handler to remove. This must be a reference to the function passed into the addListener call.
+(optional) The scope originally specified for the handler.
+Removes listeners that were added by the mon method.
+Removes listeners that were added by the mon method.
+The item from which to remove a listener/listeners.
+The event name, or an object containing event name properties.
+Optional. If the ename parameter was an event name, this
+is the handler function.
Optional. If the ename parameter was an event name, this
+is the scope (this reference) in which the handler function is executed.
Resume firing events. (see suspendEvents)
+If events were suspended using the queueSuspended parameter, then all
+events fired during event suspension will be sent to any listeners now.
Sets the root node for this tree.
+Sets the root node for this tree.
+The root node
+Suspend the firing of all events. (see resumeEvents)
+Suspend the firing of all events. (see resumeEvents)
+Pass as true to queue up suspended events to be fired +after the resumeEvents call instead of discarding all suspended events;
+Removes an event handler (shorthand for removeListener.)
+Removes an event handler (shorthand for removeListener.)
+The type of event the handler was associated with.
+The handler to remove. This must be a reference to the function passed into the addListener call.
+(optional) The scope originally specified for the handler.
+Fires when a new child node is appended to a node in this tree.
+Fires when a new child node is appended to a node in this tree.
+The owner tree
+The parent node
+The newly appended node
+The index of the newly appended node
+Fires before a new child is appended to a node in this tree, return false to cancel the append.
+Fires before a new child is appended to a node in this tree, return false to cancel the append.
+The owner tree
+The parent node
+The child node to be appended
+Fires before this node is collapsed.
+Fires before this node is collapsed.
+The collapsing node
+Fires before this node is expanded.
+Fires before this node is expanded.
+The expanding node
+Fires before a new child is inserted in a node in this tree, return false to cancel the insert.
+Fires before a new child is inserted in a node in this tree, return false to cancel the insert.
+The owner tree
+The parent node
+The child node to be inserted
+The child node the node is being inserted before
+Fires before a node is moved to a new location in the tree. Return false to cancel the move.
+Fires before a node is moved to a new location in the tree. Return false to cancel the move.
+The owner tree
+The node being moved
+The parent of the node
+The new parent the node is moving to
+The index it is being moved to
+Fires before a child is removed from a node in this tree, return false to cancel the remove.
+Fires before a child is removed from a node in this tree, return false to cancel the remove.
+The owner tree
+The parent node
+The child node to be removed
+Fires when this node is collapsed.
+Fires when this node is collapsed.
+The collapsing node
+Fires when this node is expanded.
+Fires when this node is expanded.
+The expanding node
+Fires when a new child node is inserted in a node in this tree.
+Fires when a new child node is inserted in a node in this tree.
+The owner tree
+The parent node
+The child node inserted
+The child node the node was inserted before
+Fires when a node is moved to a new location in the tree
+Fires when a node is moved to a new location in the tree
+The owner tree
+The node moved
+The old parent of this node
+The new parent of this node
+The index it was moved to
+Fires when a child node is removed from a node in this tree.
+Fires when a child node is removed from a node in this tree.
+The owner tree
+The parent node
+The child node removed
+