    Observable
      MixedCollection

# Class Ext.util.MixedCollection

Package: | Ext.util
Defined In: | MixedCollection.js
Class: | MixedCollection
Subclasses: | StoreMgr
Extends: | Observable

A Collection class that maintains both numeric indexes and keys and exposes events.

## Config Options

Config Options | Defined By
--- | ---
| allowFunctions : Boolean Specify `true` if the addAll function should add function references to the collection. Defaults to `false`. | MixedCollection
| listeners : Object A config object containing one or more event handlers to be added to this object during initialization. This should ... 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 Component's HTMLElement, listeners must be added to the Element after the Component has been rendered. A plugin can simplify this step:
    // Plugin is configured with a listeners config object.
    // The Component is appended to the argument list of all handler functions.
    Ext.DomObserver = Ext.extend(Object, {
        constructor: function(config) {
            this.listeners = config.listeners ? config.listeners : config;
        },

        // Component passes itself into plugin's init method
        init: function(c) {
            var p, l = this.listeners;
            for (p in l) {
                if (Ext.isFunction(l[p])) {
                    l[p] = this.createHandler(l[p], c);
                } else {
                    l[p].fn = this.createHandler(l[p].fn, c);
                }
            }

            // Add the listeners to the Element immediately following the render call
            c.render = c.render.createSequence(function() {
                var e = c.getEl();
                if (e) {
                    e.on(l);
                }
            });
        },

        createHandler: function(fn, c) {
            return function(e) {
                fn.call(this, e, c);
            };
        }
    });

    var combo = new Ext.form.ComboBox({

        // Collapse combo when its element is clicked on
        plugins: [ new Ext.DomObserver({
            click: function(evt, comp) {
                comp.collapse();
            }
        })],
        store: myStore,
        typeAhead: true,
        mode: 'local',
        triggerAction: 'all'
    });
| Observable

## Public Properties

This class has no public properties.

## Public Methods

Method | Defined By
--- | ---
| MixedCollection( Boolean allowFunctions, Function keyFn ) Parameters: `allowFunctions` : Boolean Specify `true` if the addAll function should add function references to the collection. Defaults to `false`. `keyFn` : Function A function that can accept an item of the type(s) stored in this MixedCollection and return the key value for that item. This is used when available to look up the key on items that were passed without an explicit key parameter to a MixedCollection method. Passing this parameter is equivalent to providing an implementation for the getKey method. Returns: void | MixedCollection
| add( String key, Object o ) : Object Adds an item to the collection. Fires the add event when complete. Adds an item to the collection. Fires the add event when complete. Parameters: `key` : String The key to associate with the item, or the new item. If a getKey implementation was specified for this MixedCollection, or if the key of the stored items is in a property called `id`, the MixedCollection will be able to derive the key for the new item. In this case just pass the new item in this parameter. `o` : Object The item to add. Returns: `Object` The item added. | MixedCollection
| addAll( Object/Array objs ) : void Adds all elements of an Array or an Object to the collection. Adds all elements of an Array or an Object to the collection. Parameters: `objs` : Object/Array An Object containing properties which will be added to the collection, or an Array of values, each of which are added to the collection. Functions references will be added to the collection if `allowFunctions` has been set to `true`. Returns: void | MixedCollection
- | addEvents( Object|String o, string Optional. ) : void 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. Parameters: `o` : Object|String 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. `Optional.` : string Event name if multiple event names are being passed as separate parameters. Usage:
      this.addEvents('storeloaded', 'storecleared');
Returns: void | Observable
- | addListener( String eventName, Function handler, [Object scope], [Object options] ) : void Appends an event handler to this object. Appends an event handler to this object. Parameters: `eventName` : String The name of the event to listen for. `handler` : Function The method the event invokes. `scope` : Object (optional) The scope (`this` reference) in which the handler function is executed. If omitted, defaults to the object which fired the event. `options` : Object (optional) An object containing handler configuration. properties. This may contain any of the following properties: scope : Object The scope (`this` reference) in which the handler function is executed. If omitted, defaults to the object which fired the event. delay : Number The number of milliseconds to delay the invocation of the handler after the 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. target : Observable Only call the handler if the event was fired on the target Observable, not if the event was bubbled up from a child Observable. Combining Options Using the options argument, it is possible to combine different types of listeners: A delayed, one-time listener.
      myDataView.on('click', this.onClick, 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 handlers.
      myGridPanel.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:
      myGridPanel.on({
      'click' : this.onClick,
      'mouseover' : this.onMouseOver,
      'mouseout' : this.onMouseOut,
       scope: this
      });
Returns: void | Observable
| clear() : void Removes all items from the collection. Fires the clear event when complete. Removes all items from the collection. Fires the clear event when complete. Parameters: None. Returns: void | MixedCollection
| clone() : MixedCollection Creates a shallow copy of this collection Creates a shallow copy of this collection Parameters: None. Returns: `MixedCollection` | MixedCollection
| contains( Object o ) : Boolean Returns true if the collection contains the passed Object as an item. Returns true if the collection contains the passed Object as an item. Parameters: `o` : Object The Object to look for in the collection. Returns: `Boolean` True if the collection contains the Object as an item. | MixedCollection
| containsKey( String key ) : Boolean Returns true if the collection contains the passed Object as a key. Returns true if the collection contains the passed Object as a key. Parameters: `key` : String The key to look for in the collection. Returns: `Boolean` True if the collection contains the Object as a key. | MixedCollection
| each( Function fn, [Object scope] ) : void Executes the specified function once for every item in the collection, passing the following arguments: <div class="m... Executes the specified function once for every item in the collection, passing the following arguments: item : Mixed The collection item index : Number The item's index length : Number The total number of items in the collection The function should return a boolean value. Returning false from the function will stop the iteration. Parameters: `fn` : Function The function to execute for each item. `scope` : Object (optional) The scope (`this` reference) in which the function is executed. Defaults to the current item in the iteration. Returns: void | MixedCollection
| eachKey( Function fn, [Object scope] ) : void Executes the specified function once for every key in the collection, passing each key, and its associated item as th... Executes the specified function once for every key in the collection, passing each key, and its associated item as the first two parameters. Parameters: `fn` : Function The function to execute for each item. `scope` : Object (optional) The scope (`this` reference) in which the function is executed. Defaults to the browser window. Returns: void | MixedCollection
| enableBubble( String/Array events ) : void Enables events fired by this Observable to bubble up an owner hierarchy by calling this.getBubbleTarget() if present.... 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, {
        //  Add functionality to Field's initComponent to enable the change event to bubble
        initComponent : Ext.form.Field.prototype.initComponent.createSequence(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');
            }
        }
    });
Parameters: `events` : String/Array The event name to bubble, or an Array of event names. Returns: void | Observable
| filter( String property, String/RegExp value, [Boolean anyMatch], [Boolean caseSensitive] ) : MixedCollection Filter the objects in this collection by a specific property. Returns a new collection that has been filtered. Filter the objects in this collection by a specific property. Returns a new collection that has been filtered. Parameters: `property` : String A property on your objects `value` : String/RegExp Either string that the property values should start with or a RegExp to test against the property `anyMatch` : Boolean (optional) True to match any part of the string, not just the beginning `caseSensitive` : Boolean (optional) True for case sensitive comparison (defaults to False). Returns: `MixedCollection` The new filtered collection | MixedCollection
| filterBy( Function fn, [Object scope] ) : MixedCollection Filter by a function. Returns a new collection that has been filtered. The passed function will be called with each o... Filter by a function. Returns a new collection that has been filtered. The passed function will be called with each object in the collection. If the function returns true, the value is included otherwise it is filtered. Parameters: `fn` : Function The function to be called, it will receive the args o (the object), k (the key) `scope` : Object (optional) The scope (`this` reference) in which the function is executed. Defaults to this MixedCollection. Returns: `MixedCollection` The new filtered collection | MixedCollection
| find( Function fn, [Object scope] ) : Object Returns the first item in the collection which elicits a true return value from the passed selection function. Returns the first item in the collection which elicits a true return value from the passed selection function. Parameters: `fn` : Function The selection function to execute for each item. `scope` : Object (optional) The scope (`this` reference) in which the function is executed. Defaults to the browser window. Returns: `Object` The first item in the collection which returned true from the selection function. | MixedCollection
| findIndex( String property, String/RegExp value, [Number start], [Boolean anyMatch], [Boolean caseSensitive] ) : Number Finds the index of the first matching object in this collection by a specific property/value. Finds the index of the first matching object in this collection by a specific property/value. Parameters: `property` : String The name of a property on your objects. `value` : String/RegExp A string that the property values should start with or a RegExp to test against the property. `start` : Number (optional) The index to start searching at (defaults to 0). `anyMatch` : Boolean (optional) True to match any part of the string, not just the beginning. `caseSensitive` : Boolean (optional) True for case sensitive comparison. Returns: `Number` The matched index or -1 | MixedCollection
| findIndexBy( Function fn, [Object scope], [Number start] ) : Number Find the index of the first matching object in this collection by a function. If the function returns true it is cons... Find the index of the first matching object in this collection by a function. If the function returns true it is considered a match. Parameters: `fn` : Function The function to be called, it will receive the args o (the object), k (the key). `scope` : Object (optional) The scope (`this` reference) in which the function is executed. Defaults to this MixedCollection. `start` : Number (optional) The index to start searching at (defaults to 0). Returns: `Number` The matched index or -1 | MixedCollection
| fireEvent( String eventName, Object... args ) : Boolean Fires the specified event with the passed parameters (minus the event name). An event may be set to bubble up an Obse... 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. Parameters: `eventName` : String The name of the event to fire. `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. | Observable
| first() : Object Returns the first item in the collection. Returns the first item in the collection. Parameters: None. Returns: `Object` the first item in the collection.. | MixedCollection
| get( String/Number key ) : Object This method calls item(). Returns the item associated with the passed key OR index. Key has priority over index. Thi... This method calls item(). Returns the item associated with the passed key OR index. Key has priority over index. This is the equivalent of calling key first, then if nothing matched calling itemAt. Parameters: `key` : String/Number The key or index of the item. Returns: `Object` If the item is found, returns the item. If the item was not found, returns <tt>undefined</tt>. If an item was found, but is a Class, returns <tt>null</tt>. | MixedCollection
| getCount() : Number Returns the number of items in the collection. Returns the number of items in the collection. Parameters: None. Returns: `Number` the number of items in the collection. | MixedCollection
| getKey( Object item ) : Object MixedCollection has a generic way to fetch keys if you implement getKey. The default implementation simply returns i... MixedCollection has a generic way to fetch keys if you implement getKey. The default implementation simply returns `item.id` but you can provide your own implementation to return a different value as in the following examples:
    // normal way
    var mc = new Ext.util.MixedCollection();
    mc.add(someEl.dom.id, someEl);
    mc.add(otherEl.dom.id, otherEl);
    //and so on

    // using getKey
    var mc = new Ext.util.MixedCollection();
    mc.getKey = function(el){
       return el.dom.id;
    };
    mc.add(someEl);
    mc.add(otherEl);

    // or via the constructor
    var mc = new Ext.util.MixedCollection(false, function(el){
       return el.dom.id;
    });
    mc.add(someEl);
    mc.add(otherEl);
Parameters: `item` : Object The item for which to find the key. Returns: `Object` The key for the passed item. | MixedCollection
| getRange( [Number startIndex], [Number endIndex] ) : Array Returns a range of items in this collection Returns a range of items in this collection Parameters: `startIndex` : Number (optional) The starting index. Defaults to 0. `endIndex` : Number (optional) The ending index. Defaults to the last item. Returns: `Array` An array of items | MixedCollection
| hasListener( String eventName ) : Boolean 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 Parameters: `eventName` : String The name of the event to check for Returns: `Boolean` True if the event is being listened for, else false | Observable
| indexOf( Object o ) : Number Returns index within the collection of the passed Object. Returns index within the collection of the passed Object. Parameters: `o` : Object The item to find the index of. Returns: `Number` index of the item. Returns -1 if not found. | MixedCollection
| indexOfKey( String key ) : Number Returns index within the collection of the passed key. Returns index within the collection of the passed key. Parameters: `key` : String The key to find the index of. Returns: `Number` index of the key. | MixedCollection
| insert( Number index, String key, [Object o] ) : Object Inserts an item at the specified index in the collection. Fires the add event when complete. Inserts an item at the specified index in the collection. Fires the add event when complete. Parameters: `index` : Number The index to insert the item at. `key` : String The key to associate with the new item, or the item itself. `o` : Object (optional) If the second parameter was a key, the new item. Returns: `Object` The item inserted. | MixedCollection
| item( String/Number key ) : Object Returns the item associated with the passed key OR index. Key has priority over index. This is the equivalent of cal... Returns the item associated with the passed key OR index. Key has priority over index. This is the equivalent of calling key first, then if nothing matched calling itemAt. Parameters: `key` : String/Number The key or index of the item. Returns: `Object` If the item is found, returns the item. If the item was not found, returns <tt>undefined</tt>. If an item was found, but is a Class, returns <tt>null</tt>. | MixedCollection
| itemAt( Number index ) : Object Returns the item at the specified index. Returns the item at the specified index. Parameters: `index` : Number The index of the item. Returns: `Object` The item at the specified index. | MixedCollection
| key( String/Number key ) : Object Returns the item associated with the passed key. Returns the item associated with the passed key. Parameters: `key` : String/Number The key of the item. Returns: `Object` The item associated with the passed key. | MixedCollection
| keySort( [String direction], [Function fn] ) : void Sorts this collection by keys. Sorts this collection by keys. Parameters: `direction` : String (optional) 'ASC' or 'DESC'. Defaults to 'ASC'. `fn` : Function (optional) Comparison function that defines the sort order. Defaults to sorting by case insensitive string. Returns: void | MixedCollection
| last() : Object Returns the last item in the collection. Returns the last item in the collection. Parameters: None. Returns: `Object` the last item in the collection.. | MixedCollection
| on( String eventName, Function handler, [Object scope], [Object options] ) : void Appends an event handler to this object (shorthand for addListener.) Appends an event handler to this object (shorthand for addListener.) Parameters: `eventName` : String The type of event to listen for `handler` : Function The method the event invokes `scope` : Object (optional) The scope (`this` reference) in which the handler function is executed. If omitted, defaults to the object which fired the event. `options` : Object (optional) An object containing handler configuration. Returns: void | Observable
| purgeListeners() : void Removes all listeners for this object Removes all listeners for this object Parameters: None. Returns: void | Observable
| relayEvents( Object o, Array events ) : void 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`. Parameters: `o` : Object The Observable whose events this object is to relay. `events` : Array Array of event names to relay. Returns: void | Observable
| remove( Object o ) : Object Remove an item from the collection. Remove an item from the collection. Parameters: `o` : Object The item to remove. Returns: `Object` The item removed or false if no item was removed. | MixedCollection
| removeAt( Number index ) : Object Remove an item from a specified index in the collection. Fires the remove event when complete. Remove an item from a specified index in the collection. Fires the remove event when complete. Parameters: `index` : Number The index within the collection of the item to remove. Returns: `Object` The item removed or false if no item was removed. | MixedCollection
| removeKey( String key ) : Object Removed an item associated with the passed key fom the collection. Removed an item associated with the passed key fom the collection. Parameters: `key` : String The key of the item to remove. Returns: `Object` The item removed or false if no item was removed. | MixedCollection
| removeListener( String eventName, Function handler, [Object scope] ) : void Removes an event handler. Removes an event handler. Parameters: `eventName` : String The type of event the handler was associated with. `handler` : Function The handler to remove. This must be a reference to the function passed into the addListener call. `scope` : Object (optional) The scope originally specified for the handler. Returns: void | Observable
| reorder( Object mapping ) : void Reorders each of the items based on a mapping from old index to new index. Internally this just translates into a sor... Reorders each of the items based on a mapping from old index to new index. Internally this just translates into a sort. The 'sort' event is fired whenever reordering has occured. Parameters: `mapping` : Object Mapping from old item index to new item index Returns: void | MixedCollection
| replace( String key, o {Object} ) : Object Replaces an item in the collection. Fires the replace event when complete. Replaces an item in the collection. Fires the replace event when complete. Parameters: `key` : String The key associated with the item to replace, or the replacement item. If you supplied a getKey implementation for this MixedCollection, or if the key of your stored items is in a property called `id`, then the MixedCollection will be able to derive the key of the replacement item. If you want to replace an item with one having the same key value, then just pass the replacement item in this parameter. `{Object}` : o o (optional) If the first parameter passed was a key, the item to associate with that key. Returns: `Object` The new item. | MixedCollection
| resumeEvents() : void Resume firing events. (see suspendEvents) If events were suspended using the queueSuspended parameter, then all event... 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. Parameters: None. Returns: void | Observable
| sort( [String direction], [Function fn] ) : void Sorts this collection by item value with the passed comparison function. Sorts this collection by item value with the passed comparison function. Parameters: `direction` : String (optional) 'ASC' or 'DESC'. Defaults to 'ASC'. `fn` : Function (optional) Comparison function that defines the sort order. Defaults to sorting by numeric value. Returns: void | MixedCollection
| suspendEvents( Boolean queueSuspended ) : void Suspend the firing of all events. (see resumeEvents) Suspend the firing of all events. (see resumeEvents) Parameters: `queueSuspended` : Boolean Pass as true to queue up suspended events to be fired after the resumeEvents call instead of discarding all suspended events; Returns: void | Observable
| un( String eventName, Function handler, [Object scope] ) : void Removes an event handler (shorthand for removeListener.) Removes an event handler (shorthand for removeListener.) Parameters: `eventName` : String The type of event the handler was associated with. `handler` : Function The handler to remove. This must be a reference to the function passed into the addListener call. `scope` : Object (optional) The scope originally specified for the handler. Returns: void | Observable

## Public Events

Event | Defined By
--- | ---
| add : ( Number index, Object o, String key ) Fires when an item is added to the collection. Fires when an item is added to the collection. Listeners will be called with the following arguments: `index` : Number The index at which the item was added. `o` : Object The item added. `key` : String The key associated with the added item. | MixedCollection
| clear : () Fires when the collection is cleared. Fires when the collection is cleared. Listeners will be called with the following arguments: None. | MixedCollection
| remove : ( Object o, [String key] ) Fires when an item is removed from the collection. Fires when an item is removed from the collection. Listeners will be called with the following arguments: `o` : Object The item being removed. `key` : String (optional) The key associated with the removed item. | MixedCollection
| replace : ( String key, Object old, Object new ) Fires when an item is replaced in the collection. Fires when an item is replaced in the collection. Listeners will be called with the following arguments: `key` : String he key associated with the new added. `old` : Object The item being replaced. `new` : Object The new item. | MixedCollection