/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
/**
 @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 20 milliseconds.

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

 @cfg {Mixed} 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 20 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.
 @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 {Mixed} el The element to listen on
 @param {Object} config
 */
Ext.util.ClickRepeater = Ext.extend(Ext.util.Observable, {
    
    constructor : 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
         * @param {Ext.EventObject} e
         */
        "mousedown",
        /**
         * @event click
         * Fires on a specified interval during the time the element is pressed.
         * @param {Ext.util.ClickRepeater} this
         * @param {Ext.EventObject} e
         */
        "click",
        /**
         * @event mouseup
         * Fires when the mouse key is released.
         * @param {Ext.util.ClickRepeater} this
         * @param {Ext.EventObject} e
         */
        "mouseup"
        );

        if(!this.disabled){
            this.disabled = true;
            this.enable();
        }

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

        Ext.util.ClickRepeater.superclass.constructor.call(this);        
    },
    
    interval : 20,
    delay: 250,
    preventDefault : true,
    stopDefault : false,
    timer : 0,

    /**
     * Enables the repeater and allows events to fire.
     */
    enable: function(){
        if(this.disabled){
            this.el.on('mousedown', this.handleMouseDown, this);
            if (Ext.isIE){
                this.el.on('dblclick', this.handleDblClick, this);
            }
            if(this.preventDefault || this.stopDefault){
                this.el.on('click', this.eventOptions, this);
            }
        }
        this.disabled = false;
    },

    /**
     * Disables the repeater and stops events from firing.
     */
    disable: function(/* private */ force){
        if(force || !this.disabled){
            clearTimeout(this.timer);
            if(this.pressClass){
                this.el.removeClass(this.pressClass);
            }
            Ext.getDoc().un('mouseup', this.handleMouseUp, this);
            this.el.removeAllListeners();
        }
        this.disabled = true;
    },

    /**
     * Convenience function for setting disabled/enabled by boolean.
     * @param {Boolean} disabled
     */
    setDisabled: function(disabled){
        this[disabled ? 'disable' : 'enable']();
    },

    eventOptions: function(e){
        if(this.preventDefault){
            e.preventDefault();
        }
        if(this.stopDefault){
            e.stopEvent();
        }
    },

    // private
    destroy : function() {
        this.disable(true);
        Ext.destroy(this.el);
        this.purgeListeners();
    },

    handleDblClick : function(e){
        clearTimeout(this.timer);
        this.el.blur();

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

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

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

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

        // Do not honor delay or interval if acceleration wanted.
        if (this.accelerate) {
            this.delay = 400;
        }
        this.timer = this.click.defer(this.delay || this.interval, this, [e]);
    },

    // private
    click : function(e){
        this.fireEvent("click", this, e);
        this.timer = this.click.defer(this.accelerate ?
            this.easeOutExpo(this.mousedownTime.getElapsed(),
                400,
                -390,
                12000) :
            this.interval, this, [e]);
    },

    easeOutExpo : function (t, b, c, d) {
        return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
    },

    // 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, this);
        if(this.pressClass){
            this.el.addClass(this.pressClass);
        }
        this.click();
    },

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