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   1  /*
   2  YUI 3.17.2 (build 9c3c78e)
   3  Copyright 2014 Yahoo! Inc. All rights reserved.
   4  Licensed under the BSD License.
   5  http://yuilibrary.com/license/
   6  */
   7  
   8  YUI.add('dd-gestures', function (Y, NAME) {
   9  
  10  
  11      /**
  12      * This module is the conditional loaded `dd` module to support gesture events
  13      * in the event that `dd` is loaded onto a device that support touch based events.
  14      *
  15      * This module is loaded and over rides 2 key methods on `DD.Drag` and `DD.DDM` to
  16      * attach the gesture events. Overrides `DD.Drag._prep` and `DD.DDM._setupListeners`
  17      * methods as well as set's the property `DD.Drag.START_EVENT` to `gesturemovestart`
  18      * to enable gesture movement instead of mouse based movement.
  19      * @module dd
  20      * @submodule dd-gestures
  21      */
  22      Y.log('Drag gesture support loaded', 'info', 'drag-gestures');
  23  
  24      Y.DD.Drag.START_EVENT = 'gesturemovestart';
  25  
  26      Y.DD.Drag.prototype._prep = function() {
  27          Y.log('Using DD override prep to attach gesture events', 'info', 'drag-gestures');
  28          this._dragThreshMet = false;
  29          var node = this.get('node'), DDM = Y.DD.DDM;
  30  
  31          node.addClass(DDM.CSS_PREFIX + '-draggable');
  32  
  33          node.on(Y.DD.Drag.START_EVENT, Y.bind(this._handleMouseDownEvent, this), {
  34              minDistance: this.get('clickPixelThresh'),
  35              minTime: this.get('clickTimeThresh')
  36          });
  37  
  38          node.on('gesturemoveend', Y.bind(this._handleMouseUp, this), { standAlone: true });
  39          node.on('dragstart', Y.bind(this._fixDragStart, this));
  40  
  41      };
  42  
  43      var _unprep = Y.DD.Drag.prototype._unprep;
  44  
  45      Y.DD.Drag.prototype._unprep = function() {
  46          var node = this.get('node');
  47          _unprep.call(this);
  48          node.detachAll('gesturemoveend');
  49      };
  50  
  51      Y.DD.DDM._setupListeners = function() {
  52          var DDM = Y.DD.DDM;
  53  
  54          this._createPG();
  55          this._active = true;
  56          Y.one(Y.config.doc).on('gesturemove', Y.throttle(Y.bind(DDM._move, DDM), DDM.get('throttleTime')), {
  57              standAlone: true
  58          });
  59      };
  60  
  61  
  62  
  63  }, '3.17.2', {"requires": ["dd-drag", "event-synthetic", "event-gestures"]});