X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/ee06f37b0f6f6d94cd05a6ffae556660f7c4a2bc..c930e9176a5a85509c5b0230e2bff5c22a591432:/source/util/KeyMap.js
diff --git a/source/util/KeyMap.js b/source/util/KeyMap.js
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-/*
- * Ext JS Library 2.2.1
- * Copyright(c) 2006-2009, Ext JS, LLC.
- * licensing@extjs.com
- *
- * http://extjs.com/license
- */
-
-/**
- * @class Ext.KeyMap
- * 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 {@link #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
- * @constructor
- * @param {Mixed} el The element to bind to
- * @param {Object} config The config (see {@link #addBinding})
- * @param {String} eventName (optional) The event to bind to (defaults to "keydown")
- */
-Ext.KeyMap = function(el, config, eventName){
- this.el = Ext.get(el);
- this.eventName = eventName || "keydown";
- this.bindings = [];
- if(config){
- this.addBinding(config);
- }
- this.enable();
-};
-
-Ext.KeyMap.prototype = {
- /**
- * True to stop the event from bubbling and prevent the default browser action if the
- * key was handled by the KeyMap (defaults to false)
- * @type Boolean
- */
- stopEvent : false,
-
- /**
- * 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
-stopEvent Boolean True to stop the event
-
- *
- * 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
-});
-
- * @param {Object/Array} config A single KeyMap config or an array of configs
- */
- addBinding : function(config){
- if(Ext.isArray(config)){
- for(var i = 0, len = config.length; i < len; i++){
- this.addBinding(config[i]);
- }
- return;
- }
- var keyCode = config.key,
- shift = config.shift,
- ctrl = config.ctrl,
- alt = config.alt,
- fn = config.fn || config.handler,
- scope = config.scope;
-
- if (config.stopEvent) {
- this.stopEvent = config.stopEvent;
- }
-
- if(typeof keyCode == "string"){
- var ks = [];
- var keyString = keyCode.toUpperCase();
- for(var j = 0, len = keyString.length; j < len; j++){
- ks.push(keyString.charCodeAt(j));
- }
- keyCode = ks;
- }
- var keyArray = Ext.isArray(keyCode);
-
- var handler = function(e){
- if((!shift || e.shiftKey) && (!ctrl || e.ctrlKey) && (!alt || e.altKey)){
- var k = e.getKey();
- if(keyArray){
- for(var i = 0, len = keyCode.length; i < len; i++){
- if(keyCode[i] == k){
- if(this.stopEvent){
- e.stopEvent();
- }
- fn.call(scope || window, k, e);
- return;
- }
- }
- }else{
- if(k == keyCode){
- if(this.stopEvent){
- e.stopEvent();
- }
- fn.call(scope || window, k, e);
- }
- }
- }
- };
- this.bindings.push(handler);
- },
-
- /**
- * Shorthand for adding a single key listener
- * @param {Number/Array/Object} key 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)}
- * @param {Function} fn The function to call
- * @param {Object} scope (optional) The scope of the function
- */
- on : function(key, fn, scope){
- var keyCode, shift, ctrl, alt;
- if(typeof key == "object" && !Ext.isArray(key)){
- keyCode = key.key;
- shift = key.shift;
- ctrl = key.ctrl;
- alt = key.alt;
- }else{
- keyCode = key;
- }
- this.addBinding({
- key: keyCode,
- shift: shift,
- ctrl: ctrl,
- alt: alt,
- fn: fn,
- scope: scope
- })
- },
-
- // private
- handleKeyDown : function(e){
- if(this.enabled){ //just in case
- var b = this.bindings;
- for(var i = 0, len = b.length; i < len; i++){
- b[i].call(this, e);
- }
- }
- },
-
- /**
- * Returns true if this KeyMap is enabled
- * @return {Boolean}
- */
- isEnabled : function(){
- return this.enabled;
- },
-
- /**
- * Enables this KeyMap
- */
- enable: function(){
- if(!this.enabled){
- this.el.on(this.eventName, this.handleKeyDown, this);
- this.enabled = true;
- }
- },
-
- /**
- * Disable this KeyMap
- */
- disable: function(){
- if(this.enabled){
- this.el.removeListener(this.eventName, this.handleKeyDown, this);
- this.enabled = false;
- }
- }
-};
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