Class Ext.KeyMap

Package:	Ext
Defined In:	KeyMap.js
Class:	KeyMap
Extends:	Object

Handles mapping keys to actions for an element. One key map can be used for multiple actions. The constructor accepts the same config object as defined by addBinding. If you bind a callback function to a KeyMap, anytime the KeyMap handles an expected key combination it will call the function with this signature (if the match is a multi-key combination the callback will still be called only once): (String key, Ext.EventObject e) A KeyMap can also handle a string representation of keys.
Usage:

// map one key by key code
var map = new Ext.KeyMap("my-element", {
    key: 13, // or Ext.EventObject.ENTER
    fn: myHandler,
    scope: myObject
});

// map multiple keys to one action by string
var map = new Ext.KeyMap("my-element", {
    key: "a\r\n\t",
    fn: myHandler,
    scope: myObject
});

// map multiple keys to multiple actions by strings and array of codes
var map = new Ext.KeyMap("my-element", [
    {
        key: [10,13],
        fn: function(){ alert("Return was pressed"); }
    }, {
        key: "abc",
        fn: function(){ alert('a, b or c was pressed'); }
    }, {
        key: "\t",
        ctrl:true,
        shift:true,
        fn: function(){ alert('Control + shift + tab was pressed.'); }
    }
]);

Note: A KeyMap starts enabled

Public Properties

Property		Defined By
	stopEvent : Boolean True to stop the event from bubbling and prevent the default browser action if the key was handled by the KeyMap (def... True to stop the event from bubbling and prevent the default browser action if the key was handled by the KeyMap (defaults to false)	KeyMap

Public Methods

Method		Defined By
	KeyMap( `Mixed el`, `Object config`, [`String eventName`] ) Parameters: `el` : Mixed The element to bind to `config` : Object The config (see addBinding) `eventName` : String (optional) The event to bind to (defaults to "keydown") Returns:	KeyMap
	addBinding( `Object/Array config` ) : void Add a new binding to this KeyMap. The following config object properties are supported: Property Type ... Add a new binding to this KeyMap. The following config object properties are supported: Property Type Description ---------- --------------- ---------------------------------------------------------------------- key String/Array A single keycode or an array of keycodes to handle shift Boolean True to handle key only when shift is pressed (defaults to false) ctrl Boolean True to handle key only when ctrl is pressed (defaults to false) alt Boolean True to handle key only when alt is pressed (defaults to false) handler Function The function to call when KeyMap finds the expected key combination fn Function Alias of handler (for backwards-compatibility) scope Object The scope of the callback function Usage: `// Create a KeyMap var map = new Ext.KeyMap(document, { key: Ext.EventObject.ENTER, fn: handleKey, scope: this }); //Add a new binding to the existing KeyMap later map.addBinding({ key: 'abc', shift: true, fn: handleKey, scope: this });` Parameters: `config` : Object/Array A single KeyMap config or an array of configs Returns: `void`	KeyMap
	disable() : void Disable this KeyMap Disable this KeyMap Parameters: None. Returns: `void`	KeyMap
	enable() : void Enables this KeyMap Enables this KeyMap Parameters: None. Returns: `void`	KeyMap
	isEnabled() : Boolean Returns true if this KeyMap is enabled Returns true if this KeyMap is enabled Parameters: None. Returns: `Boolean`	KeyMap
	on( `Number/Array/Object key`, `Function fn`, [`Object scope`] ) : void Shorthand for adding a single key listener Shorthand for adding a single key listener Parameters: `key` : Number/Array/Object Either the numeric key code, array of key codes or an object with the following options: {key: (number or array), shift: (true/false), ctrl: (true/false), alt: (true/false)} `fn` : Function The function to call `scope` : Object (optional) The scope of the function Returns: `void`	KeyMap

Public Events

This class has no public events.