Roo/EventManager.js

/*
 * Based on:
 * Ext JS Library 1.1.1
 * Copyright(c) 2006-2007, Ext JS, LLC.
 *
 * Originally Released Under LGPL - original licence link has changed is not relivant.
 *
 * Fork - LGPL
 * <script type="text/javascript">
 */

/**
 * @class Roo.EventManager
 * Registers event handlers that want to receive a normalized EventObject instead of the standard browser event and provides 
 * several useful events directly.
 * See {@link Roo.EventObject} for more details on normalized event objects.
 * @singleton
 */
Roo.EventManager = function(){
    var docReadyEvent, docReadyProcId, docReadyState = false;
    var resizeEvent, resizeTask, textEvent, textSize;
    var E = Roo.lib.Event;
    var D = Roo.lib.Dom;




    var fireDocReady = function(){
        if(!docReadyState){
            docReadyState = true;
            Roo.isReady = true;
            if(docReadyProcId){
                clearInterval(docReadyProcId);
            }
            if(Roo.isGecko || Roo.isOpera) {
                document.removeEventListener("DOMContentLoaded", fireDocReady, false);
            }
            if(Roo.isIE){
                var defer = document.getElementById("ie-deferred-loader");
                if(defer){
                    defer.onreadystatechange = null;
                    defer.parentNode.removeChild(defer);
                }
            }
            if(docReadyEvent){
                docReadyEvent.fire();
                docReadyEvent.clearListeners();
            }
        }
    };

    var initDocReady = function(){
        docReadyEvent = new Roo.util.Event();
        if(Roo.isGecko || Roo.isOpera) {
            document.addEventListener("DOMContentLoaded", fireDocReady, false);
        }else if(Roo.isIE){
            document.write("<s"+'cript id="ie-deferred-loader" defer="defer" src="/'+'/:"></s'+"cript>");
            var defer = document.getElementById("ie-deferred-loader");
            defer.onreadystatechange = function(){
                if(this.readyState == "complete"){
                    fireDocReady();
                }
            };
        }else if(Roo.isSafari){
            docReadyProcId = setInterval(function(){
                var rs = document.readyState;
                if(rs == "complete") {
                    fireDocReady();
                 }
            }, 10);
        }
        // no matter what, make sure it fires on load
        E.on(window, "load", fireDocReady);
    };

    var createBuffered = function(h, o){
        var task = new Roo.util.DelayedTask(h);
        return function(e){
            // create new event object impl so new events don't wipe out properties
            e = new Roo.EventObjectImpl(e);
            task.delay(o.buffer, h, null, [e]);
        };
    };

    var createSingle = function(h, el, ename, fn){
        return function(e){
            Roo.EventManager.removeListener(el, ename, fn);
            h(e);
        };
    };

    var createDelayed = function(h, o){
        return function(e){
            // create new event object impl so new events don't wipe out properties
            e = new Roo.EventObjectImpl(e);
            setTimeout(function(){
                h(e);
            }, o.delay || 10);
        };
    };
    var transitionEndVal = false;

    var transitionEnd = function()
    {
        if (transitionEndVal) {
            return transitionEndVal;
        }
        var el = document.createElement('div');

        var transEndEventNames = {
            WebkitTransition : 'webkitTransitionEnd',
            MozTransition    : 'transitionend',
            OTransition      : 'oTransitionEnd otransitionend',
            transition       : 'transitionend'
        };

        for (var name in transEndEventNames) {
            if (el.style[name] !== undefined) {
                transitionEndVal = transEndEventNames[name];
                return  transitionEndVal ;
            }
        }
    }


    var listen = function(element, ename, opt, fn, scope){
        var o = (!opt || typeof opt == "boolean") ? {} : opt;
        fn = fn || o.fn; scope = scope || o.scope;
        var el = Roo.getDom(element);


        if(!el){
            throw "Error listening for \"" + ename + '\". Element "' + element + '" doesn\'t exist.';
        }

        if (ename == 'transitionend') {
            ename = transitionEnd();
        }
        var h = function(e){
            e = Roo.EventObject.setEvent(e);
            var t;
            if(o.delegate){
                t = e.getTarget(o.delegate, el);
                if(!t){
                    return;
                }
            }else{
                t = e.target;
            }
            if(o.stopEvent === true){
                e.stopEvent();
            }
            if(o.preventDefault === true){
               e.preventDefault();
            }
            if(o.stopPropagation === true){
                e.stopPropagation();
            }

            if(o.normalized === false){
                e = e.browserEvent;
            }

            fn.call(scope || el, e, t, o);
        };
        if(o.delay){
            h = createDelayed(h, o);
        }
        if(o.single){
            h = createSingle(h, el, ename, fn);
        }
        if(o.buffer){
            h = createBuffered(h, o);
        }

        fn._handlers = fn._handlers || [];


        fn._handlers.push([Roo.id(el), ename, h]);



        E.on(el, ename, h);
        if(ename == "mousewheel" && el.addEventListener){ // workaround for jQuery
            el.addEventListener("DOMMouseScroll", h, false);
            E.on(window, 'unload', function(){
                el.removeEventListener("DOMMouseScroll", h, false);
            });
        }
        if(ename == "mousedown" && el == document){ // fix stopped mousedowns on the document
            Roo.EventManager.stoppedMouseDownEvent.addListener(h);
        }
        return h;
    };

    var stopListening = function(el, ename, fn){
        var id = Roo.id(el), hds = fn._handlers, hd = fn;
        if(hds){
            for(var i = 0, len = hds.length; i < len; i++){
                var h = hds[i];
                if(h[0] == id && h[1] == ename){
                    hd = h[2];
                    hds.splice(i, 1);
                    break;
                }
            }
        }
        E.un(el, ename, hd);
        el = Roo.getDom(el);
        if(ename == "mousewheel" && el.addEventListener){
            el.removeEventListener("DOMMouseScroll", hd, false);
        }
        if(ename == "mousedown" && el == document){ // fix stopped mousedowns on the document
            Roo.EventManager.stoppedMouseDownEvent.removeListener(hd);
        }
    };

    var propRe = /^(?:scope|delay|buffer|single|stopEvent|preventDefault|stopPropagation|normalized|args|delegate)$/;

    var pub = {


        /** 
         * Fix for doc tools
         * @scope Roo.EventManager
         */


        /** 
         * This is no longer needed and is deprecated. Places a simple wrapper around an event handler to override the browser event
         * object with a Roo.EventObject
         * @param {Function} fn        The method the event invokes
         * @param {Object}   scope    An object that becomes the scope of the handler
         * @param {boolean}  override If true, the obj passed in becomes
         *                             the execution scope of the listener
         * @return {Function} The wrapped function
         * @deprecated
         */
        wrap : function(fn, scope, override){
            return function(e){
                Roo.EventObject.setEvent(e);
                fn.call(override ? scope || window : window, Roo.EventObject, scope);
            };
        },

        /**
     * Appends an event handler to an element (shorthand for addListener)
     * @param {String/HTMLElement}   element        The html element or id to assign the
     * @param {String}   eventName The type of event to listen for
     * @param {Function} handler The method the event invokes
     * @param {Object}   scope (optional) The scope in which to execute the handler
     * function. The handler function's "this" context.
     * @param {Object}   options (optional) An object containing handler configuration
     * properties. This may contain any of the following properties:<ul>
     * <li>scope {Object} The scope in which to execute the handler function. The handler function's "this" context.</li>
     * <li>delegate {String} A simple selector to filter the target or look for a descendant of the target</li>
     * <li>stopEvent {Boolean} True to stop the event. That is stop propagation, and prevent the default action.</li>
     * <li>preventDefault {Boolean} True to prevent the default action</li>
     * <li>stopPropagation {Boolean} True to prevent event propagation</li>
     * <li>normalized {Boolean} False to pass a browser event to the handler function instead of an Roo.EventObject</li>
     * <li>delay {Number} The number of milliseconds to delay the invocation of the handler after te event fires.</li>
     * <li>single {Boolean} True to add a handler to handle just the next firing of the event, and then remove itself.</li>
     * <li>buffer {Number} Causes the handler to be scheduled to run in an {@link Roo.util.DelayedTask} delayed
     * by the specified number of milliseconds. If the event fires again within that time, the original
     * handler is <em>not</em> invoked, but the new handler is scheduled in its place.</li>
     * </ul><br>
     * <p>
     * <b>Combining Options</b><br>
     * Using the options argument, it is possible to combine different types of listeners:<br>
     * <br>
     * A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId)<div style="margin: 5px 20px 20px;">
     * Code:<pre><code>
el.on('click', this.onClick, this, {
    single: true,
    delay: 100,
    stopEvent : true,
    forumId: 4
});</code></pre>
     * <p>
     * <b>Attaching multiple handlers in 1 call</b><br>
      * The method also allows for a single argument to be passed which is a config object containing properties
     * which specify multiple handlers.
     * <p>
     * Code:<pre><code>
el.on({
    'click' : {
        fn: this.onClick
        scope: this,
        delay: 100
    },
    'mouseover' : {
        fn: this.onMouseOver
        scope: this
    },
    'mouseout' : {
        fn: this.onMouseOut
        scope: this
    }
});</code></pre>
     * <p>
     * Or a shorthand syntax:<br>
     * Code:<pre><code>
el.on({
    'click' : this.onClick,
    'mouseover' : this.onMouseOver,
    'mouseout' : this.onMouseOut
    scope: this
});</code></pre>
     */
        addListener : function(element, eventName, fn, scope, options){
            if(typeof eventName == "object"){
                var o = eventName;
                for(var e in o){
                    if(propRe.test(e)){
                        continue;
                    }
                    if(typeof o[e] == "function"){
                        // shared options
                        listen(element, e, o, o[e], o.scope);
                    }else{
                        // individual options
                        listen(element, e, o[e]);
                    }
                }
                return;
            }
            return listen(element, eventName, options, fn, scope);
        },

        /**
         * Removes an event handler
         *
         * @param {String/HTMLElement}   element        The id or html element to remove the 
         *                             event from
         * @param {String}   eventName     The type of event
         * @param {Function} fn
         * @return {Boolean} True if a listener was actually removed
         */
        removeListener : function(element, eventName, fn){
            return stopListening(element, eventName, fn);
        },

        /**
         * Fires when the document is ready (before onload and before images are loaded). Can be 
         * accessed shorthanded Roo.onReady().
         * @param {Function} fn        The method the event invokes
         * @param {Object}   scope    An  object that becomes the scope of the handler
         * @param {boolean}  options
         */
        onDocumentReady : function(fn, scope, options){
            if(docReadyState){ // if it already fired
                docReadyEvent.addListener(fn, scope, options);
                docReadyEvent.fire();
                docReadyEvent.clearListeners();
                return;
            }
            if(!docReadyEvent){
                initDocReady();
            }
            docReadyEvent.addListener(fn, scope, options);
        },

        /**
         * Fires when the window is resized and provides resize event buffering (50 milliseconds), passes new viewport width and height to handlers.
         * @param {Function} fn        The method the event invokes
         * @param {Object}   scope    An object that becomes the scope of the handler
         * @param {boolean}  options
         */
        onWindowResize : function(fn, scope, options){
            if(!resizeEvent){
                resizeEvent = new Roo.util.Event();
                resizeTask = new Roo.util.DelayedTask(function(){
                    resizeEvent.fire(D.getViewWidth(), D.getViewHeight());
                });
                E.on(window, "resize", function(){
                    if(Roo.isIE){
                        resizeTask.delay(50);
                    }else{
                        resizeEvent.fire(D.getViewWidth(), D.getViewHeight());
                    }
                });
            }
            resizeEvent.addListener(fn, scope, options);
        },

        /**
         * Fires when the user changes the active text size. Handler gets called with 2 params, the old size and the new size.
         * @param {Function} fn        The method the event invokes
         * @param {Object}   scope    An object that becomes the scope of the handler
         * @param {boolean}  options
         */
        onTextResize : function(fn, scope, options){
            if(!textEvent){
                textEvent = new Roo.util.Event();
                var textEl = new Roo.Element(document.createElement('div'));
                textEl.dom.className = 'x-text-resize';
                textEl.dom.innerHTML = 'X';
                textEl.appendTo(document.body);
                textSize = textEl.dom.offsetHeight;
                setInterval(function(){
                    if(textEl.dom.offsetHeight != textSize){
                        textEvent.fire(textSize, textSize = textEl.dom.offsetHeight);
                    }
                }, this.textResizeInterval);
            }
            textEvent.addListener(fn, scope, options);
        },

        /**
         * Removes the passed window resize listener.
         * @param {Function} fn        The method the event invokes
         * @param {Object}   scope    The scope of handler
         */
        removeResizeListener : function(fn, scope){
            if(resizeEvent){
                resizeEvent.removeListener(fn, scope);
            }
        },

        // private
        fireResize : function(){
            if(resizeEvent){
                resizeEvent.fire(D.getViewWidth(), D.getViewHeight());
            }
        },
        /**
         * Url used for onDocumentReady with using SSL (defaults to Roo.SSL_SECURE_URL)
         */
        ieDeferSrc : false,
        /**
         * The frequency, in milliseconds, to check for text resize events (defaults to 50)
         */
        textResizeInterval : 50
    };

    /**
     * Fix for doc tools
     * @scopeAlias pub=Roo.EventManager
     */

     /**
     * Appends an event handler to an element (shorthand for addListener)
     * @param {String/HTMLElement}   element        The html element or id to assign the
     * @param {String}   eventName The type of event to listen for
     * @param {Function} handler The method the event invokes
     * @param {Object}   scope (optional) The scope in which to execute the handler
     * function. The handler function's "this" context.
     * @param {Object}   options (optional) An object containing handler configuration
     * properties. This may contain any of the following properties:<ul>
     * <li>scope {Object} The scope in which to execute the handler function. The handler function's "this" context.</li>
     * <li>delegate {String} A simple selector to filter the target or look for a descendant of the target</li>
     * <li>stopEvent {Boolean} True to stop the event. That is stop propagation, and prevent the default action.</li>
     * <li>preventDefault {Boolean} True to prevent the default action</li>
     * <li>stopPropagation {Boolean} True to prevent event propagation</li>
     * <li>normalized {Boolean} False to pass a browser event to the handler function instead of an Roo.EventObject</li>
     * <li>delay {Number} The number of milliseconds to delay the invocation of the handler after te event fires.</li>
     * <li>single {Boolean} True to add a handler to handle just the next firing of the event, and then remove itself.</li>
     * <li>buffer {Number} Causes the handler to be scheduled to run in an {@link Roo.util.DelayedTask} delayed
     * by the specified number of milliseconds. If the event fires again within that time, the original
     * handler is <em>not</em> invoked, but the new handler is scheduled in its place.</li>
     * </ul><br>
     * <p>
     * <b>Combining Options</b><br>
     * Using the options argument, it is possible to combine different types of listeners:<br>
     * <br>
     * A normalized, delayed, one-time listener that auto stops the event and passes a custom argument (forumId)<div style="margin: 5px 20px 20px;">
     * Code:<pre><code>
el.on('click', this.onClick, this, {
    single: true,
    delay: 100,
    stopEvent : true,
    forumId: 4
});</code></pre>
     * <p>
     * <b>Attaching multiple handlers in 1 call</b><br>
      * The method also allows for a single argument to be passed which is a config object containing properties
     * which specify multiple handlers.
     * <p>
     * Code:<pre><code>
el.on({
    'click' : {
        fn: this.onClick
        scope: this,
        delay: 100
    },
    'mouseover' : {
        fn: this.onMouseOver
        scope: this
    },
    'mouseout' : {
        fn: this.onMouseOut
        scope: this
    }
});</code></pre>
     * <p>
     * Or a shorthand syntax:<br>
     * Code:<pre><code>
el.on({
    'click' : this.onClick,
    'mouseover' : this.onMouseOver,
    'mouseout' : this.onMouseOut
    scope: this
});</code></pre>
     */
    pub.on = pub.addListener;
    pub.un = pub.removeListener;

    pub.stoppedMouseDownEvent = new Roo.util.Event();
    return pub;
}();
/**
  * Fires when the document is ready (before onload and before images are loaded).  Shorthand of {@link Roo.EventManager#onDocumentReady}.
  * @param {Function} fn        The method the event invokes
  * @param {Object}   scope    An  object that becomes the scope of the handler
  * @param {boolean}  override If true, the obj passed in becomes
  *                             the execution scope of the listener
  * @member Roo
  * @method onReady
 */
Roo.onReady = Roo.EventManager.onDocumentReady;

Roo.onReady(function(){
    var bd = Roo.get(document.body);
    if(!bd){ return; }

    var cls = [
            Roo.isIE ? "roo-ie"
            : Roo.isIE11 ? "roo-ie11"
            : Roo.isEdge ? "roo-edge"
            : Roo.isGecko ? "roo-gecko"
            : Roo.isOpera ? "roo-opera"
            : Roo.isSafari ? "roo-safari" : ""];

    if(Roo.isMac){
        cls.push("roo-mac");
    }
    if(Roo.isLinux){
        cls.push("roo-linux");
    }
    if(Roo.isIOS){
        cls.push("roo-ios");
    }
    if(Roo.isTouch){
        cls.push("roo-touch");
    }
    if(Roo.isBorderBox){
        cls.push('roo-border-box');
    }
    if(Roo.isStrict){ // add to the parent to allow for selectors like ".ext-strict .ext-ie"
        var p = bd.dom.parentNode;
        if(p){
            p.className += ' roo-strict';
        }
    }
    bd.addClass(cls.join(' '));
});

/**
 * @class Roo.EventObject
 * EventObject exposes the Yahoo! UI Event functionality directly on the object
 * passed to your event handler. It exists mostly for convenience. It also fixes the annoying null checks automatically to cleanup your code 
 * Example:
 * <pre><code>
 function handleClick(e){ // e is not a standard event object, it is a Roo.EventObject
    e.preventDefault();
    var target = e.getTarget();
    ...
 }
 var myDiv = Roo.get("myDiv");
 myDiv.on("click", handleClick);
 //or
 Roo.EventManager.on("myDiv", 'click', handleClick);
 Roo.EventManager.addListener("myDiv", 'click', handleClick);
 </code></pre>
 * @singleton
 */
Roo.EventObject = function(){

    var E = Roo.lib.Event;

    // safari keypress events for special keys return bad keycodes
    var safariKeys = {
        63234 : 37, // left
        63235 : 39, // right
        63232 : 38, // up
        63233 : 40, // down
        63276 : 33, // page up
        63277 : 34, // page down
        63272 : 46, // delete
        63273 : 36, // home
        63275 : 35  // end
    };

    // normalize button clicks
    var btnMap = Roo.isIE ? {1:0,4:1,2:2} :
                (Roo.isSafari ? {1:0,2:1,3:2} : {0:0,1:1,2:2});

    Roo.EventObjectImpl = function(e){
        if(e){
            this.setEvent(e.browserEvent || e);
        }
    };
    Roo.EventObjectImpl.prototype = {
        /**
         * Used to fix doc tools.
         * @scope Roo.EventObject.prototype
         */




        /** The normal browser event */
        browserEvent : null,
        /** The button pressed in a mouse event */
        button : -1,
        /** True if the shift key was down during the event */
        shiftKey : false,
        /** True if the control key was down during the event */
        ctrlKey : false,
        /** True if the alt key was down during the event */
        altKey : false,

        /** Key constant 
        * @type Number */
        BACKSPACE : 8,
        /** Key constant 
        * @type Number */
        TAB : 9,
        /** Key constant 
        * @type Number */
        RETURN : 13,
        /** Key constant 
        * @type Number */
        ENTER : 13,
        /** Key constant 
        * @type Number */
        SHIFT : 16,
        /** Key constant 
        * @type Number */
        CONTROL : 17,
        /** Key constant 
        * @type Number */
        ESC : 27,
        /** Key constant 
        * @type Number */
        SPACE : 32,
        /** Key constant 
        * @type Number */
        PAGEUP : 33,
        /** Key constant 
        * @type Number */
        PAGEDOWN : 34,
        /** Key constant 
        * @type Number */
        END : 35,
        /** Key constant 
        * @type Number */
        HOME : 36,
        /** Key constant 
        * @type Number */
        LEFT : 37,
        /** Key constant 
        * @type Number */
        UP : 38,
        /** Key constant 
        * @type Number */
        RIGHT : 39,
        /** Key constant 
        * @type Number */
        DOWN : 40,
        /** Key constant 
        * @type Number */
        DELETE : 46,
        /** Key constant 
        * @type Number */
        F5 : 116,

           /** @private */
        setEvent : function(e){
            if(e == this || (e && e.browserEvent)){ // already wrapped
                return e;
            }
            this.browserEvent = e;
            if(e){
                // normalize buttons
                this.button = e.button ? btnMap[e.button] : (e.which ? e.which-1 : -1);
                if(e.type == 'click' && this.button == -1){
                    this.button = 0;
                }
                this.type = e.type;
                this.shiftKey = e.shiftKey;
                // mac metaKey behaves like ctrlKey
                this.ctrlKey = e.ctrlKey || e.metaKey;
                this.altKey = e.altKey;
                // in getKey these will be normalized for the mac
                this.keyCode = e.keyCode;
                // keyup warnings on firefox.
                this.charCode = (e.type == 'keyup' || e.type == 'keydown') ? 0 : e.charCode;
                // cache the target for the delayed and or buffered events
                this.target = E.getTarget(e);
                // same for XY
                this.xy = E.getXY(e);
            }else{
                this.button = -1;
                this.shiftKey = false;
                this.ctrlKey = false;
                this.altKey = false;
                this.keyCode = 0;
                this.charCode =0;
                this.target = null;
                this.xy = [0, 0];
            }
            return this;
        },

        /**
         * Stop the event (preventDefault and stopPropagation)
         */
        stopEvent : function(){
            if(this.browserEvent){
                if(this.browserEvent.type == 'mousedown'){
                    Roo.EventManager.stoppedMouseDownEvent.fire(this);
                }
                E.stopEvent(this.browserEvent);
            }
        },

        /**
         * Prevents the browsers default handling of the event.
         */
        preventDefault : function(){
            if(this.browserEvent){
                E.preventDefault(this.browserEvent);
            }
        },

        /** @private */
        isNavKeyPress : function(){
            var k = this.keyCode;
            k = Roo.isSafari ? (safariKeys[k] || k) : k;
            return (k >= 33 && k <= 40) || k == this.RETURN || k == this.TAB || k == this.ESC;
        },

        isSpecialKey : function(){
            var k = this.keyCode;
            return (this.type == 'keypress' && this.ctrlKey) || k == 9 || k == 13  || k == 40 || k == 27 ||
            (k == 16) || (k == 17) ||
            (k >= 18 && k <= 20) ||
            (k >= 33 && k <= 35) ||
            (k >= 36 && k <= 39) ||
            (k >= 44 && k <= 45);
        },
        /**
         * Cancels bubbling of the event.
         */
        stopPropagation : function(){
            if(this.browserEvent){
                if(this.type == 'mousedown'){
                    Roo.EventManager.stoppedMouseDownEvent.fire(this);
                }
                E.stopPropagation(this.browserEvent);
            }
        },

        /**
         * Gets the key code for the event.
         * @return {Number}
         */
        getCharCode : function(){
            return this.charCode || this.keyCode;
        },

        /**
         * Returns a normalized keyCode for the event.
         * @return {Number} The key code
         */
        getKey : function(){
            var k = this.keyCode || this.charCode;
            return Roo.isSafari ? (safariKeys[k] || k) : k;
        },

        /**
         * Gets the x coordinate of the event.
         * @return {Number}
         */
        getPageX : function(){
            return this.xy[0];
        },

        /**
         * Gets the y coordinate of the event.
         * @return {Number}
         */
        getPageY : function(){
            return this.xy[1];
        },

        /**
         * Gets the time of the event.
         * @return {Number}
         */
        getTime : function(){
            if(this.browserEvent){
                return E.getTime(this.browserEvent);
            }
            return null;
        },

        /**
         * Gets the page coordinates of the event.
         * @return {Array} The xy values like [x, y]
         */
        getXY : function(){
            return this.xy;
        },

        /**
         * Gets the target for the event.
         * @param {String} selector (optional) A simple selector to filter the target or look for an ancestor of the target
         * @param {Number/String/HTMLElement/Element} maxDepth (optional) The max depth to
                search as a number or element (defaults to 10 || document.body)
         * @param {Boolean} returnEl (optional) True to return a Roo.Element object instead of DOM node
         * @return {HTMLelement}
         */
        getTarget : function(selector, maxDepth, returnEl){
            return selector ? Roo.fly(this.target).findParent(selector, maxDepth, returnEl) : this.target;
        },
        /**
         * Gets the related target.
         * @return {HTMLElement}
         */
        getRelatedTarget : function(){
            if(this.browserEvent){
                return E.getRelatedTarget(this.browserEvent);
            }
            return null;
        },

        /**
         * Normalizes mouse wheel delta across browsers
         * @return {Number} The delta
         */
        getWheelDelta : function(){
            var e = this.browserEvent;
            var delta = 0;
            if(e.wheelDelta){ /* IE/Opera. */
                delta = e.wheelDelta/120;
            }else if(e.detail){ /* Mozilla case. */
                delta = -e.detail/3;
            }
            return delta;
        },

        /**
         * Returns true if the control, meta, shift or alt key was pressed during this event.
         * @return {Boolean}
         */
        hasModifier : function(){
            return !!((this.ctrlKey || this.altKey) || this.shiftKey);
        },

        /**
         * Returns true if the target of this event equals el or is a child of el
         * @param {String/HTMLElement/Element} el
         * @param {Boolean} related (optional) true to test if the related target is within el instead of the target
         * @return {Boolean}
         */
        within : function(el, related){
            var t = this[related ? "getRelatedTarget" : "getTarget"]();
            return t && Roo.fly(el).contains(t);
        },

        getPoint : function(){
            return new Roo.lib.Point(this.xy[0], this.xy[1]);
        }
    };

    return new Roo.EventObjectImpl();
}();