# ClickRepeater.js

    /**
     @class Ext.util.ClickRepeater
     @extends Ext.util.Observable

     A wrapper class which can be applied to any element. Fires a "click" event while the
     mouse is pressed. The interval between firings may be specified in the config but
     defaults to 10 milliseconds.

     Optionally, a CSS class may be applied to the element during the time it is pressed.

     @cfg {String/HTMLElement/Element} el The element to act as a button.
     @cfg {Number} delay The initial delay before the repeating event begins firing.
     Similar to an autorepeat key delay.
     @cfg {Number} interval The interval between firings of the "click" event. Default 10 ms.
     @cfg {String} pressClass A CSS class name to be applied to the element while pressed.
     @cfg {Boolean} accelerate True if autorepeating should start slowly and accelerate.
               "interval" and "delay" are ignored. "immediate" is honored.
     @cfg {Boolean} preventDefault True to prevent the default click event
     @cfg {Boolean} stopDefault True to stop the default click event

     @history
        2007-02-02 jvs Original code contributed by Nige "Animal" White
        2007-02-02 jvs Renamed to ClickRepeater
        2007-02-03 jvs Modifications for FF Mac and Safari

     @constructor
     @param {String/HTMLElement/Element} el The element to listen on
     @param {Object} config
     */
    Ext.util.ClickRepeater = function(el, config)
    {
        this.el = Ext.get(el);
        this.el.unselectable();

        Ext.apply(this, config);

        this.addEvents({
        /**
         * @event mousedown
         * Fires when the mouse button is depressed.
         * @param {Ext.util.ClickRepeater} this
         */
            "mousedown" : true,
        /**
         * @event click
         * Fires on a specified interval during the time the element is pressed.
         * @param {Ext.util.ClickRepeater} this
         */
            "click" : true,
        /**
         * @event mouseup
         * Fires when the mouse key is released.
         * @param {Ext.util.ClickRepeater} this
         */
            "mouseup" : true
        });

        this.el.on("mousedown", this.handleMouseDown, this);
        if(this.preventDefault || this.stopDefault){
            this.el.on("click", function(e){
                if(this.preventDefault){
                    e.preventDefault();
                }
                if(this.stopDefault){
                    e.stopEvent();
                }
            }, this);
        }

        // allow inline handler
        if(this.handler){
            this.on("click", this.handler,  this.scope || this);
        }

        Ext.util.ClickRepeater.superclass.constructor.call(this);
    };

    Ext.extend(Ext.util.ClickRepeater, Ext.util.Observable, {
        interval : 20,
        delay: 250,
        preventDefault : true,
        stopDefault : false,
        timer : 0,

        // private
        handleMouseDown : function(){
            clearTimeout(this.timer);
            this.el.blur();
            if(this.pressClass){
                this.el.addClass(this.pressClass);
            }
            this.mousedownTime = new Date();

            Ext.get(document).on("mouseup", this.handleMouseUp, this);
            this.el.on("mouseout", this.handleMouseOut, this);

            this.fireEvent("mousedown", this);
            this.fireEvent("click", this);

            this.timer = this.click.defer(this.delay || this.interval, this);
        },

        // private
        click : function(){
            this.fireEvent("click", this);
            this.timer = this.click.defer(this.getInterval(), this);
        },

        // private
        getInterval: function(){
            if(!this.accelerate){
                return this.interval;
            }
            var pressTime = this.mousedownTime.getElapsed();
            if(pressTime < 500){
                return 400;
            }else if(pressTime < 1700){
                return 320;
            }else if(pressTime < 2600){
                return 250;
            }else if(pressTime < 3500){
                return 180;
            }else if(pressTime < 4400){
                return 140;
            }else if(pressTime < 5300){
                return 80;
            }else if(pressTime < 6200){
                return 50;
            }else{
                return 10;
            }
        },

        // private
        handleMouseOut : function(){
            clearTimeout(this.timer);
            if(this.pressClass){
                this.el.removeClass(this.pressClass);
            }
            this.el.on("mouseover", this.handleMouseReturn, this);
        },

        // private
        handleMouseReturn : function(){
            this.el.un("mouseover", this.handleMouseReturn);
            if(this.pressClass){
                this.el.addClass(this.pressClass);
            }
            this.click();
        },

        // private
        handleMouseUp : function(){
            clearTimeout(this.timer);
            this.el.un("mouseover", this.handleMouseReturn);
            this.el.un("mouseout", this.handleMouseOut);
            Ext.get(document).un("mouseup", this.handleMouseUp);
            this.el.removeClass(this.pressClass);
            this.fireEvent("mouseup", this);
        }
    });

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