# Class Ext.EventManager

Package: | Ext
Defined In: | EventManager.js, EventManager-more.js
Class: | EventManager
Extends: | Object

Registers event handlers that want to receive a normalized EventObject instead of the standard browser event and provides several useful events directly. See Ext.EventObject for more details on normalized event objects.
This class is a singleton and cannot be created directly.

## Public Properties

Property | Defined By
--- | ---
| A : Number Key constant | EventManager
| ALT : Number Key constant | EventManager
| B : Number Key constant | EventManager
| BACKSPACE : Number Key constant | EventManager
| C : Number Key constant | EventManager
| CAPS_LOCK : Number Key constant | EventManager
| CONTEXT_MENU : Number Key constant | EventManager
| CTRL : Number Key constant | EventManager
| D : Number Key constant | EventManager
| DELETE : Number Key constant | EventManager
| DOWN : Number Key constant | EventManager
| E : Number Key constant | EventManager
| EIGHT : Number Key constant | EventManager
| END : Number Key constant | EventManager
| ENTER : Number Key constant | EventManager
| ESC : Number Key constant | EventManager
| F : Number Key constant | EventManager
| F1 : Number Key constant | EventManager
| F10 : Number Key constant | EventManager
| F11 : Number Key constant | EventManager
| F12 : Number Key constant | EventManager
| F2 : Number Key constant | EventManager
| F3 : Number Key constant | EventManager
| F4 : Number Key constant | EventManager
| F5 : Number Key constant | EventManager
| F6 : Number Key constant | EventManager
| F7 : Number Key constant | EventManager
| F8 : Number Key constant | EventManager
| F9 : Number Key constant | EventManager
| FIVE : Number Key constant | EventManager
| FOUR : Number Key constant | EventManager
| G : Number Key constant | EventManager
| H : Number Key constant | EventManager
| HOME : Number Key constant | EventManager
| I : Number Key constant | EventManager
| INSERT : Number Key constant | EventManager
| J : Number Key constant | EventManager
| K : Number Key constant | EventManager
| L : Number Key constant | EventManager
| LEFT : Number Key constant | EventManager
| M : Number Key constant | EventManager
| N : Number Key constant | EventManager
| NINE : Number Key constant | EventManager
| NUM_CENTER : Number Key constant | EventManager
| NUM_DIVISION : Number Key constant | EventManager
| NUM_EIGHT : Number Key constant | EventManager
| NUM_FIVE : Number Key constant | EventManager
| NUM_FOUR : Number Key constant | EventManager
| NUM_MINUS : Number Key constant | EventManager
| NUM_MULTIPLY : Number Key constant | EventManager
| NUM_NINE : Number Key constant | EventManager
| NUM_ONE : Number Key constant | EventManager
| NUM_PERIOD : Number Key constant | EventManager
| NUM_PLUS : Number Key constant | EventManager
| NUM_SEVEN : Number Key constant | EventManager
| NUM_SIX : Number Key constant | EventManager
| NUM_THREE : Number Key constant | EventManager
| NUM_TWO : Number Key constant | EventManager
| NUM_ZERO : Number Key constant | EventManager
| O : Number Key constant | EventManager
| ONE : Number Key constant | EventManager
| P : Number Key constant | EventManager
| PAGE_DOWN : Number Key constant | EventManager
| PAGE_UP : Number Key constant | EventManager
| PAUSE : Number Key constant | EventManager
| PRINT_SCREEN : Number Key constant | EventManager
| Q : Number Key constant | EventManager
| R : Number Key constant | EventManager
| RETURN : Number Key constant | EventManager
| RIGHT : Number Key constant | EventManager
| S : Number Key constant | EventManager
| SEVEN : Number Key constant | EventManager
| SHIFT : Number Key constant | EventManager
| SIX : Number Key constant | EventManager
| SPACE : Number Key constant | EventManager
| T : Number Key constant | EventManager
| TAB : Number Key constant | EventManager
| THREE : Number Key constant | EventManager
| TWO : Number Key constant | EventManager
| U : Number Key constant | EventManager
| UP : Number Key constant | EventManager
| V : Number Key constant | EventManager
| W : Number Key constant | EventManager
| X : Number Key constant | EventManager
| Y : Number Key constant | EventManager
| Z : Number Key constant | EventManager
| ZERO : Number Key constant | EventManager
| ieDeferSrc : Object Url used for onDocumentReady with using SSL (defaults to Ext.SSL_SECURE_URL) | EventManager
| textResizeInterval : Object The frequency, in milliseconds, to check for text resize events (defaults to 50) | EventManager

## Public Methods

Method | Defined By
--- | ---
| addListener( `String/HTMLElement el`, `String eventName`, `Function handler`, [`Object scope`], [`Object options`] ) : void Appends an event handler to an element. The shorthand version on is equivalent. Typically you will use Ext.Element... Appends an event handler to an element. The shorthand version on is equivalent. Typically you will use Ext.Element.addListener directly on an Element in favor of calling this version. Parameters: `el` : String/HTMLElement The html element or id to assign the event handler to. `eventName` : String The name of the event to listen for. `handler` : Function The handler function the event invokes. This function is passed the following parameters: evt : EventObject The EventObject describing the event. t : Element The Element which was the target of the event. Note that this may be filtered by using the `delegate` option. o : Object The options object from the addListener call. `scope` : Object (optional) The scope (`this` reference) in which the handler function is executed. Defaults to the Element. `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. Defaults to the Element. 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. target : Element Only call the handler if the event was fired on the target Element, not if the event was bubbled up from a child node. See Ext.Element.addListener for examples of how to use these options. Returns: void | EventManager
| hasModifier() : Boolean Returns true if the control, meta, shift or alt key was pressed during this event. Returns true if the control, meta, shift or alt key was pressed during this event. Parameters: None. Returns: `Boolean` | EventManager
| on( `String/HTMLElement el`, `String eventName`, `Function handler`, [`Object scope`], [`Object options`] ) : void Appends an event handler to an element. Shorthand for addListener. Appends an event handler to an element. Shorthand for addListener. Parameters: `el` : String/HTMLElement The html element or id to assign the event handler to `eventName` : String The name of the event to listen for. `handler` : Function The handler function the event invokes. `scope` : Object (optional) (`this` reference) in which the handler function executes. Defaults to the Element. `options` : Object (optional) An object containing standard addListener options Returns: void | EventManager
| onDocumentReady( `Function fn`, [`Object scope`], [`boolean options`] ) : void Adds a listener to be notified when the document is ready (before onload and before images are loaded). Can be acces... Adds a listener to be notified when the document is ready (before onload and before images are loaded). Can be accessed shorthanded as Ext.onReady(). Parameters: `fn` : Function The method the event invokes. `scope` : Object (optional) The scope (`this` reference) in which the handler function executes. Defaults to the browser window. `options` : boolean (optional) Options object as passed to Ext.Element.addListener. It is recommended that the options `{single: true}` be used so that the handler is removed on first invocation. Returns: void | EventManager
| onTextResize( `Function fn`, `Object scope`, `boolean options` ) : void Adds a listener to be notified when the user changes the active text size. Handler gets called with 2 params, the old... Adds a listener to be notified when the user changes the active text size. Handler gets called with 2 params, the old size and the new size. Parameters: `fn` : Function The function the event invokes. `scope` : Object The scope (`this` reference) in which the handler function executes. Defaults to the browser window. `options` : boolean Options object as passed to Ext.Element.addListener Returns: void | EventManager
| onWindowResize( `Function fn`, `Object scope`, `boolean options` ) : void Adds a listener to be notified when the browser window is resized and provides resize event buffering (50 millisecond... Adds a listener to be notified when the browser window is resized and provides resize event buffering (50 milliseconds), passes new viewport width and height to handlers. Parameters: `fn` : Function The handler function the window resize event invokes. `scope` : Object The scope (`this` reference) in which the handler function executes. Defaults to the browser window. `options` : boolean Options object as passed to Ext.Element.addListener Returns: void | EventManager
| removeAll( `String/HTMLElement el` ) : void Removes all event handers from an element. Typically you will use Ext.Element.removeAllListeners directly on an Ele... Removes all event handers from an element. Typically you will use Ext.Element.removeAllListeners directly on an Element in favor of calling this version. Parameters: `el` : String/HTMLElement The id or html element from which to remove all event handlers. Returns: void | EventManager
| removeListener( `String/HTMLElement el`, `String eventName`, `Function fn`, `Object scope` ) : void Removes an event handler from an element. The shorthand version un is equivalent. Typically you will use Ext.Eleme... Removes an event handler from an element. The shorthand version un is equivalent. Typically you will use Ext.Element.removeListener directly on an Element in favor of calling this version. Parameters: `el` : String/HTMLElement The id or html element from which to remove the listener. `eventName` : String The name of the event. `fn` : Function The handler function to remove. This must be a reference to the function passed into the addListener call. `scope` : Object If a scope (`this` reference) was specified when the listener was added, then this must refer to the same object. Returns: void | EventManager
| removeResizeListener( `Function fn`, `Object scope` ) : void Removes the passed window resize listener. Removes the passed window resize listener. Parameters: `fn` : Function The method the event invokes `scope` : Object The scope of handler Returns: void | EventManager
| un( `String/HTMLElement el`, `String eventName`, `Function fn`, `Object scope` ) : void Removes an event handler from an element. Shorthand for removeListener. Removes an event handler from an element. Shorthand for removeListener. Parameters: `el` : String/HTMLElement The id or html element from which to remove the listener. `eventName` : String The name of the event. `fn` : Function The handler function to remove. This must be a reference to the function passed into the on call. `scope` : Object If a scope (`this` reference) was specified when the listener was added, then this must refer to the same object. Returns: void | EventManager

## Public Events

This class has no public events.