131 lines
No EOL
3 KiB
JavaScript
131 lines
No EOL
3 KiB
JavaScript
/*
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* Ext JS Library 1.0.1
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* Copyright(c) 2006-2007, Ext JS, LLC.
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* licensing@extjs.com
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*
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* http://www.extjs.com/license
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*/
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/**
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* @class Ext.KeyNav
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* Provides a convenient wrapper for normalized keyboard navigation. KeyNav allows you to bind
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* navigation keys to function calls that will get called when the keys are pressed.
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* <br />Usage:
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<pre><code>
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var nav = new Ext.KeyNav("my-element", {
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"left" : function(e){
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this.moveLeft(e.ctrlKey);
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},
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"right" : function(e){
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this.moveRight(e.ctrlKey);
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},
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"enter" : function(e){
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this.save();
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},
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scope : this
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});
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</code></pre>
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* @constructor
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* @param {String/HTMLElement/Ext.Element} el The element to bind to
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* @param {Object} config The config
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*/
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Ext.KeyNav = function(el, config){
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this.el = Ext.get(el);
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Ext.apply(this, config);
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if(!this.disabled){
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this.disabled = true;
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this.enable();
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}
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};
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Ext.KeyNav.prototype = {
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disabled : false,
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defaultEventAction: "stopEvent",
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prepareEvent : function(e){
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var k = e.getKey();
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var h = this.keyToHandler[k];
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//if(h && this[h]){
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// e.stopPropagation();
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//}
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if(Ext.isSafari && h && k >= 37 && k <= 40){
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e.stopEvent();
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}
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},
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relay : function(e){
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var k = e.getKey();
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var h = this.keyToHandler[k];
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if(h && this[h]){
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if(this.doRelay(e, this[h], h) !== true){
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e[this.defaultEventAction]();
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}
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}
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},
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doRelay : function(e, h, hname){
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return h.call(this.scope || this, e);
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},
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// possible handlers
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enter : false,
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left : false,
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right : false,
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up : false,
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down : false,
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tab : false,
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esc : false,
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pageUp : false,
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pageDown : false,
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del : false,
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home : false,
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end : false,
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// quick lookup hash
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keyToHandler : {
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37 : "left",
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39 : "right",
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38 : "up",
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40 : "down",
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33 : "pageUp",
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34 : "pageDown",
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46 : "del",
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36 : "home",
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35 : "end",
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13 : "enter",
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27 : "esc",
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9 : "tab"
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},
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/**
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* Enable this KeyNav
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*/
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enable: function(){
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if(this.disabled){
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// ie won't do special keys on keypress, no one else will repeat keys with keydown
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// the EventObject will normalize Safari automatically
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if(Ext.isIE){
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this.el.on("keydown", this.relay, this);
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}else{
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this.el.on("keydown", this.prepareEvent, this);
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this.el.on("keypress", this.relay, this);
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}
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this.disabled = false;
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}
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},
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/**
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* Disable this KeyNav
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*/
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disable: function(){
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if(!this.disabled){
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if(Ext.isIE){
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this.el.un("keydown", this.relay);
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}else{
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this.el.un("keydown", this.prepareEvent);
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this.el.un("keypress", this.relay);
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}
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this.disabled = true;
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}
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}
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}; |