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/*
YUI 3.17.2 (build 9c3c78e)
Copyright 2014 Yahoo! Inc. All rights reserved.
Licensed under the BSD License.
http://yuilibrary.com/license/
*/

YUI.add('dd-gestures', function (Y, NAME) {

/**
    * This module is the conditional loaded `dd` module to support gesture events
    * in the event that `dd` is loaded onto a device that support touch based events.
    *
    * This module is loaded and over rides 2 key methods on `DD.Drag` and `DD.DDM` to
    * attach the gesture events. Overrides `DD.Drag._prep` and `DD.DDM._setupListeners`
    * methods as well as set's the property `DD.Drag.START_EVENT` to `gesturemovestart`
    * to enable gesture movement instead of mouse based movement.
    * @module dd
    * @submodule dd-gestures
    */
    Y.log('Drag gesture support loaded', 'info', 'drag-gestures');

Y.DD.Drag.START_EVENT = 'gesturemovestart';

Y.DD.Drag.prototype._prep = function() {
        Y.log('Using DD override prep to attach gesture events', 'info', 'drag-gestures');
        this._dragThreshMet = false;
        var node = this.get('node'), DDM = Y.DD.DDM;

node.addClass(DDM.CSS_PREFIX + '-draggable');

node.on(Y.DD.Drag.START_EVENT, Y.bind(this._handleMouseDownEvent, this), {
            minDistance: this.get('clickPixelThresh'),
            minTime: this.get('clickTimeThresh')
        });

node.on('gesturemoveend', Y.bind(this._handleMouseUp, this), { standAlone: true });
        node.on('dragstart', Y.bind(this._fixDragStart, this));

};

var _unprep = Y.DD.Drag.prototype._unprep;

Y.DD.Drag.prototype._unprep = function() {
        var node = this.get('node');
        _unprep.call(this);
        node.detachAll('gesturemoveend');
    };

Y.DD.DDM._setupListeners = function() {
        var DDM = Y.DD.DDM;

this._createPG();
        this._active = true;
        Y.one(Y.config.doc).on('gesturemove', Y.throttle(Y.bind(DDM._move, DDM), DDM.get('throttleTime')), {
            standAlone: true
        });
    };

}, '3.17.2', {"requires": ["dd-drag", "event-synthetic", "event-gestures"]});