0.6.x/js/ui/05_XUI_Gesture.js

   1 /* original:\r
   2  *  Hammer.JS - v1.0.5 - 2013-04-07\r
   3  *  http://eightmedia.github.com/hammer.js\r
   4  *  Jorik Tangelder <j.tangelder@gmail.com>, MIT license\r
   5  **/\r
   6 \r
   7 ( function( Math, window, document, undefined ){\r
   8         \r
   9         var ELEENT_LIST = [],\r
  10                 HAMMER_LIST = [],\r
  11                 POINTERS    = [],\r
  12                 ABS = new Function( 'v', 'return v<0?-v:v' );\r
  13         \r
  14         X.UI.Gesture = Hammer;\r
  15         \r
  16         function Hammer( uinodeRoot, uinode, type ){\r
  17                 this.uinode  = uinode;\r
  18                 this.enabled = true;\r
  19                 \r
  20                 Hammer.startup && Hammer.startup( uinodeRoot );\r
  21 \r
  22                 this.options = Hammer.defaults;\r
  23 \r
  24                 // start detection on touchstart\r
  25                 Utils.addEvents( uinode, Hammer.EVENT_TYPES_START, this );\r
  26                 \r
  27                 this.listen( type );\r
  28         };\r
  29         \r
  30         Hammer.defaults = {};\r
  31         \r
  32         Hammer.prototype.handleEvent = function( e ){\r
  33                 //var sourceEventType = e.type.toLowerCase();\r
  34 \r
  35                 var type       = IdToGestureID[ e.type ],\r
  36                         gestures   = Detection.gestures,\r
  37                         numTouches = 0,// count the total touches on the screen\r
  38                         pointerType, i, l, touches, ret, active, gesture, startEv,\r
  39                         deltaTime, deltaX, deltaY, velocity;\r
  40 \r
  41                 if( !type ) return;\r
  42                 \r
  43                 if( e.pointerType ){\r
  44                         type |= POINTER;\r
  45                         switch( e.pointerType ){\r
  46                                 case 'touch' :\r
  47                                 case e.MSPOINTER_TYPE_TOUCH :\r
  48                                         type |= TOUCH; break;\r
  49                                 case 'pen' :\r
  50                                 case e.MSPOINTER_TYPE_PEN :\r
  51                                         type |= PEN; break;\r
  52                                 case 'mouse' :\r
  53                                 case e.MSPOINTER_TYPE_MOUSE :\r
  54                                         type |= MOUSE; break;\r
  55                                 default :\r
  56                                         return;\r
  57                         };\r
  58                 } else\r
  59                 if( e.touches ){\r
  60                         type |= TOUCH;\r
  61                 } else {\r
  62                         type |= MOUSE;\r
  63                 };\r
  64                 \r
  65                 // onmouseup, but when touchend has been fired we do nothing.\r
  66                 // this is for touchdevices which also fire a mouseup on touchend\r
  67                 if( type & MOUSE && touch_triggered ){\r
  68                         return X.Callback.STOP_NOW | X.Callback.STOP_PROPAGATION | X.Callback.PREVENT_DEFAULT;\r
  69                 }\r
  70                 // mousebutton must be down or a touch event\r
  71                 else if (\r
  72                         type & TOUCH || //sourceEventType.match(/touch/) || // touch events are always on screen\r
  73                         ( type & POINTER && type & START ) || //sourceEventType.match(/pointerdown/) || // pointerevents touch\r
  74                         ( type & MOUSE   && e.which === 1 ) //(sourceEventType.match(/mouse/) && e.which === 1) // mouse is pressed\r
  75                 ){\r
  76                         enable_detect = true;\r
  77                 };\r
  78 \r
  79                 // we are in a touch event, set the touch triggered bool to true,\r
  80                 // this for the conflicts that may occur on ios and android\r
  81                 type & ( TOUCH | POINTER ) && ( touch_triggered = true );\r
  82                 //if (sourceEventType.match(/touch|pointer/)) { touch_triggered = true;}\r
  83 \r
  84                 // when touch has been triggered in this detection session\r
  85                 // and we are now handling a mouse event, we stop that to prevent conflicts\r
  86                 if( enable_detect ){\r
  87                         // update pointerevent\r
  88                         if( Hammer.HAS_POINTEREVENTS ){ //eventType !== Hammer.EVENT_END ){\r
  89                                 POINTERS[ e.identifier = e.pointerId ] = type & END ? null : e;\r
  90                                 touches = [];\r
  91                                 // we can use forEach since pointerEvents only is in IE10\r
  92                                 for( i = 0, l = POINTERS.length; i < l; ++i ){\r
  93                                         POINTERS[ i ] && ( touches[ touches.length ] = POINTERS[ i ] );\r
  94                                 };\r
  95                                 numTouches = touches.length;\r
  96                         } else\r
  97                         // touch\r
  98                         if ( type & TOUCH ){ //sourceEventType.match(/touch/)) {\r
  99                                 touches    = Hammer.DO_TOUCHES_FIX && type & END ? [] : e.touches;\r
 100                                 numTouches = touches.length;\r
 101                         } else\r
 102                         // mouse\r
 103                         if( !touch_triggered ){\r
 104                                 numTouches = ( type & END ) ? 0 : 1;\r
 105                                 touches    = numTouches === 0 ? [] : [{\r
 106                                         identifier : 1,\r
 107                                         pageX      : e.pageX,\r
 108                                         pageY      : e.pageY,\r
 109                                         target     : e.target\r
 110                                 }];\r
 111                         };\r
 112 \r
 113                         // if we are in a end event, but when we remove one touch and\r
 114                         // we still have enough, set eventType to move\r
 115                         if( 0 < numTouches && type & END ){ // eventType === Hammer.EVENT_END ){\r
 116                                 type = type & POINTER_TYPE_MASK | MOVE;\r
 117                                 //eventType = Hammer.EVENT_MOVE;\r
 118                         } else if( !numTouches ){\r
 119                         // no touches, force the end event\r
 120                                 type = type & POINTER_TYPE_MASK | END;\r
 121                                 //eventType = Hammer.EVENT_END;\r
 122                         };\r
 123 \r
 124                         // because touchend has no touches, and we often want to use these in our gestures,\r
 125                         // we send the last move event as our eventData in touchend\r
 126                         ( !numTouches && last_move_event !== null ) ?\r
 127                                 ( e = last_move_event ):\r
 128                                 ( last_move_event = e ); // store the last move event\r
 129 \r
 130                         e = {\r
 131                                 center      : Utils.getCenter( touches ),\r
 132                                 timeStamp   : Date.now ? Date.now() : +new Date,\r
 133                                 target      : e.target,\r
 134                                 touches     : touches,\r
 135                                 eventType   : type & EVENT_TYPE_MASK,\r
 136                                 pointerType : type & POINTER_TYPE_MASK\r
 137                         };\r
 138 \r
 139                         if( type & START ){\r
 140                                 if( !this.enabled ) return;\r
 141                                 // already busy with a Hammer.gesture detection on an element\r
 142                                 if( Detection.current ) return;\r
 143                                 Detection.current = {\r
 144                                         hammer     : this, // reference to HammerInstance we're working for\r
 145                                         startEvent : Utils.extend( {}, e ), // start eventData for distances, timing etc\r
 146                                         lastEvent  : false, // last eventData\r
 147                                         name       : '' // current gesture we're in/detected, can be 'tap', 'hold' etc\r
 148                                 };\r
 149                                 Detection.stopped = false;\r
 150                                 hammer = this;\r
 151                                 active = hammer.activeGesture;\r
 152                         } else\r
 153                         if( !Detection.current || Detection.stopped ){\r
 154                                 return;\r
 155                         } else {\r
 156                                 hammer = Detection.current.hammer;\r
 157                                 active = hammer.activeGesture;\r
 158                         };\r
 159                         \r
 160                         // ----------------------------------------------------------------------------------------------------------------\r
 161                         // ret = Detection.detect( e );\r
 162 \r
 163                         // ----------------------------------------------------------------------------------------------------------------\r
 164                         // extend event data with calculations about scale, distance etc\r
 165                         // e = Detection.extendEventData( e );\r
 166                         startEv = Detection.current.startEvent;\r
 167                         center  = e.center;\r
 168 \r
 169                         // if the touches change, set the new touches over the startEvent touches\r
 170                         // this because touchevents don't have all the touches on touchstart, or the\r
 171                         // user must place his fingers at the EXACT same time on the screen, which is not realistic\r
 172                         // but, sometimes it happens that both fingers are touching at the EXACT same time\r
 173                         if( startEv && ( numTouches !== startEv.touches.length || touches === startEv.touches ) ){\r
 174                                 // extend 1 level deep to get the touchlist with the touch objects\r
 175                                 startEv.touches.length = i = 0;\r
 176                                 for( ; i < numTouches; ++i ){\r
 177                                         startEv.touches[ startEv.touches.length ] = Utils.extend( {}, touches[ i ] );\r
 178                                 };\r
 179                         };\r
 180 \r
 181                         deltaTime = e.timeStamp  - startEv.timeStamp;\r
 182                         deltaX    = center.pageX - startEv.center.pageX;\r
 183                         deltaY    = center.pageY - startEv.center.pageY;\r
 184                         velocity  = Utils.getVelocity( deltaTime, deltaX, deltaY );\r
 185 \r
 186                         Utils.extend( e, {\r
 187                                 deltaTime  : deltaTime,\r
 188 \r
 189                                 deltaX     : deltaX,\r
 190                                 deltaY     : deltaY,\r
 191 \r
 192                                 velocityX  : velocity.x,\r
 193                                 velocityY  : velocity.y,\r
 194 \r
 195                                 distance   : Utils.getDistance( startEv.center, center ),\r
 196                                 angle      : Utils.getAngle( startEv.center, center ),\r
 197                                 direction  : Utils.getDirection( startEv.center, center ),\r
 198 \r
 199                                 scale      : Utils.getScale( startEv.touches, touches ),\r
 200                                 rotation   : Utils.getRotation( startEv.touches, touches ),\r
 201 \r
 202                                 startEvent : startEv\r
 203                         });\r
 204 \r
 205                         // store as previous event event\r
 206                         Detection.current.lastEvent = e;\r
 207                         \r
 208                         // call Hammer.gesture handlers\r
 209                         for( i = 0, l = gestures.length; i < l; ++i ){\r
 210                                 gesture = gestures[ i ];\r
 211                                 if( Detection.stopped ) break;\r
 212                                 //if( active[ gesture.name ] ) console.log( gesture.name );\r
 213                                 // only when the instance options have enabled this gesture\r
 214                                 active[ gesture.name ] &&\r
 215                                         // if a handler returns false, we stop with the detection\r
 216                                         ( ret |= ( gesture.handler.call( gesture, e, hammer ) || X.Callback.NONE ) );\r
 217                         };\r
 218 \r
 219                         // endevent, but not the last touch, so dont stop\r
 220                         type & END && numTouches === 0 && Detection.stopDetect();\r
 221                         \r
 222                         // ----------------------------------------------------------------------------------------------------------------\r
 223                         // trigger the handler\r
 224                         //handler.call( context, HamEvent.collectEventData( element, eventType, e ) );\r
 225 \r
 226                         // remove pointerevent from list\r
 227                         if( Hammer.HAS_POINTEREVENTS && type & END ){ // eventType === Hammer.EVENT_END ){\r
 228                                 numTouches = 0;\r
 229                         };\r
 230                 };\r
 231 \r
 232                 //debug(sourceEventType +" "+ eventType);\r
 233 \r
 234                 // on the end we reset everything\r
 235                 if( numTouches === 0 ){\r
 236                         last_move_event = null;\r
 237                         enable_detect   = false;\r
 238                         touch_triggered = false;\r
 239                         POINTERS.length = 0;\r
 240                 };\r
 241                 \r
 242                 return ret;\r
 243         };\r
 244         \r
 245         Hammer.startup = function( uinodeRoot ){\r
 246                 // find what eventtypes we add listeners to\r
 247                 /**\r
 248                  * we have different events for each device/browser\r
 249                  * determine what we need and set them in the Hammer.EVENT_TYPES constant\r
 250                  */\r
 251                 // determine the eventtype we want to set\r
 252                 // for non pointer events browsers and mixed browsers,\r
 253                 // like chrome on windows8 touch laptop         \r
 254                 var types, name;\r
 255 \r
 256                 // Register all gestures inside Gestures\r
 257                 for( name in Gestures ){\r
 258                         Gestures.hasOwnProperty( name ) && Detection.register( Gestures[ name ] );\r
 259                 };\r
 260 \r
 261                 if( navigator.pointerEnabled || navigator.msPointerEnabled ){\r
 262                         Hammer.EVENT_TYPES_START = [ X.UI.Event._POINTER_DOWN ];\r
 263                         types = [ X.UI.Event._POINTER_MOVE, X.UI.Event._POINTER_UP, X.UI.Event._POINTER_CANCEL ];\r
 264                 } else\r
 265                 if( window.ontouchstart !== void 0 ){\r
 266                         Hammer.EVENT_TYPES_START = [ X.UI.Event._TOUCH_START ];\r
 267                         types = [ X.UI.Event._TOUCH_MOVE, X.UI.Event._MOUSE_MOVE, X.UI.Event._TOUCH_END, X.UI.Event._TOUCH_CANCEL ];\r
 268                 } else {\r
 269                         Hammer.EVENT_TYPES_START = [ X.UI.Event._MOUSE_DOWN ];\r
 270                         types = [ X.UI.Event._MOUSE_MOVE, X.UI.Event._MOUSE_UP, X.UI.Event._MOUSE_CANCEL ];\r
 271                 };\r
 272 \r
 273                 // Add touch events on the document\r
 274                 Utils.addEvents( uinodeRoot, types, Hammer.prototype.handleEvent );\r
 275 \r
 276                 // Hammer is ready...!\r
 277                 delete Hammer.startup;\r
 278         };\r
 279         \r
 280         Hammer.prototype.trigger = function( type, gesture ){\r
 281                 if( !this.types[ type ] ) return;\r
 282                 var e = Utils.extend( {}, gesture );\r
 283                 e.type = type;\r
 284                 console.log( 'trigger : ' + type );\r
 285                 return this.uinode.dispatch( e );\r
 286         };\r
 287         \r
 288         Hammer.prototype.listen = function( type ){\r
 289                 var gestures = Detection.gestures,\r
 290                         i = gestures.length, g;\r
 291                 for( ; i; ){\r
 292                         g = gestures[ --i ];\r
 293                         if( g.startID <= type && type <= g.endID ){\r
 294                                 if( !this.activeGesture ) this.activeGesture = {};\r
 295                                 if( !this.types ) this.types = {};\r
 296                                 this.activeGesture[ g.name ] = this.types[ type ] = 1;\r
 297                                 return;\r
 298                         };\r
 299                 };\r
 300         };\r
 301         \r
 302         Hammer.prototype.unlisten = function( type ){\r
 303                 var gestures = Detection.gestures,\r
 304                         i = gestures.length, g;\r
 305                 if( !this.activeGesture ) return;\r
 306                 for( ; i; ){\r
 307                         g = gestures[ --i ];\r
 308                         if( g.startID <= type && type <= g.endID ){\r
 309                                 if( this.activeGesture[ g.name ] ){\r
 310                                         if( this.types[ type ] ) delete this.types[ type ];\r
 311                                         for( i = g.startID; i <= g.endID; ++i ){\r
 312                                                 if( this.types[ i ] ) return;\r
 313                                         };\r
 314                                         delete this.activeGesture[ g.name ];\r
 315                                 };\r
 316                                 return;\r
 317                         };\r
 318                 };\r
 319         };\r
 320         \r
 321         /*\r
 322          *  "Android version < 2.2" return ev.touches.length === 1 when touchend, others return ev.touches.length === 0\r
 323          */\r
 324         Hammer.DO_TOUCHES_FIX = Hammer.HAS_TOUCHEVENTS && ( function( ua, i ){\r
 325                                 if( ( i = ua.indexOf('android') ) === -1 ) return false;\r
 326                                 return ( parseFloat( ua.substr( i + 8 ) ) || 0 ) < 2.2;\r
 327                         })( navigator.userAgent.toLowerCase() );\r
 328         \r
 329         // detect touchevents\r
 330         Hammer.HAS_POINTEREVENTS = navigator.pointerEnabled || navigator.msPointerEnabled;\r
 331 \r
 332         // eventtypes per touchevent (start, move, end)\r
 333         // are filled by HamEvent.determineEventTypes on setup\r
 334         Hammer.EVENT_TYPES_START = null;\r
 335 \r
 336         // direction defines\r
 337         Hammer.DIRECTION_DOWN  = 'down';\r
 338         Hammer.DIRECTION_LEFT  = 'left';\r
 339         Hammer.DIRECTION_UP    = 'up';\r
 340         Hammer.DIRECTION_RIGHT = 'right';\r
 341 \r
 342         // plugins namespace\r
 343         Hammer.plugins = {};\r
 344 \r
 345         var POINTER     = 1,\r
 346                 TOUCH       = 2,\r
 347                 PEN         = 8, //4,\r
 348                 MOUSE       = 8,\r
 349                 START       = 16,\r
 350                 MOVE        = 32,\r
 351                 END         = 64,\r
 352                 CANCEL      = 128,\r
 353                 EVENT_TYPE_MASK   = START | MOVE | END,\r
 354                 POINTER_TYPE_MASK = POINTER | TOUCH | MOUSE | PEN,\r
 355                 IdToGestureID = {};\r
 356         IdToGestureID[ X.UI.Event._POINTER_DOWN   ] = START;\r
 357         IdToGestureID[ X.UI.Event._POINTER_MOVE   ] = MOVE;\r
 358         IdToGestureID[ X.UI.Event._POINTER_UP     ] = END;\r
 359         IdToGestureID[ X.UI.Event._POINTER_CANCEL ] = END;\r
 360         \r
 361         IdToGestureID[ X.UI.Event._TOUCH_START  ] = START;\r
 362         IdToGestureID[ X.UI.Event._TOUCH_MOVE   ] = MOVE;\r
 363         IdToGestureID[ X.UI.Event._TOUCH_END    ] = END;\r
 364         IdToGestureID[ X.UI.Event._TOUCH_CANCEL ] = END;\r
 365         \r
 366         IdToGestureID[ X.UI.Event._MOUSE_DOWN   ] = START;\r
 367         IdToGestureID[ X.UI.Event._MOUSE_MOVE   ] = MOVE;\r
 368         IdToGestureID[ X.UI.Event._MOUSE_UP     ] = END;\r
 369         IdToGestureID[ X.UI.Event._MOUSE_CANCEL ] = END;\r
 370         \r
 371         Utils = {\r
 372                 \r
 373                 /**\r
 374                  * touch events with mouse fallback\r
 375                  * @param   {HTMLElement}   element\r
 376                  * @param   {String}        eventType        like Hammer.EVENT_MOVE\r
 377                  * @param   {Function}      handler\r
 378                  */\r
 379                 addEvents : function( uinode, types, context ){\r
 380                         for( var i = 0; i < types.length; ++i ){\r
 381                                 uinode.listen( types[ i ], context );\r
 382                         };\r
 383                 },\r
 384                 \r
 385                 /**\r
 386                  * extend method,\r
 387                  * also used for cloning when dest is an empty object\r
 388                  * @param   {Object}    dest\r
 389                  * @param   {Object}    src\r
 390                  * @parm        {Boolean}       merge           do a merge\r
 391                  * @returns {Object}    dest\r
 392                  */\r
 393                 extend : function extend( dest, src, merge ){\r
 394                         for( var key in src ){\r
 395                                 if( dest[ key ] !== undefined && merge ) continue;\r
 396                                 dest[ key ] = src[ key ];\r
 397                         };\r
 398                         return dest;\r
 399                 },\r
 400 \r
 401                 /**\r
 402                  * find if a node is in the given parent\r
 403                  * used for event delegation tricks\r
 404                  * @param   {HTMLElement}   node\r
 405                  * @param   {HTMLElement}   parent\r
 406                  * @returns {boolean}       has_parent\r
 407                  */\r
 408                 hasParent : function( node, parent ){\r
 409                         while( node && node.tagName ){ /* tagName for ie */\r
 410                                 if( node === parent ) return true;\r
 411                                 node = node.parentNode;\r
 412                         };\r
 413                         return false;\r
 414                 },\r
 415 \r
 416                 /**\r
 417                  * get the center of all the touches\r
 418                  * @param   {Array}     touches\r
 419                  * @returns {Object}    center\r
 420                  */\r
 421                 getCenter : function getCenter(touches) {\r
 422                         var i = 0,\r
 423                                 l = touches.length,\r
 424                                 valuesX, valuesY;\r
 425                         switch( l ){\r
 426                                 case 0 :\r
 427                                         return {};\r
 428                                 case 1 :\r
 429                                         return {\r
 430                                                 pageX : touches[ 0 ].pageX,\r
 431                                                 pageY : touches[ 0 ].pageY\r
 432                                         };\r
 433                                 case 2 :\r
 434                                         return {\r
 435                                                 pageX : ( touches[ 0 ].pageX + touches[ 1 ].pageX ) / 2,\r
 436                                                 pageY : ( touches[ 0 ].pageY + touches[ 1 ].pageY ) / 2\r
 437                                         };\r
 438                         };\r
 439                         valuesX = [];\r
 440                         valuesY = [];\r
 441                         for( ; i < l; ++i ){\r
 442                                 valuesX[ valuesX.length ] = touches[ i ].pageX;\r
 443                                 valuesY[ valuesY.length ] = touches[ i ].pageY;\r
 444                         };\r
 445                         return {\r
 446                                 pageX : ( ( Math.min.apply( null, valuesX ) + Math.max.apply( null, valuesX ) ) / 2 ),\r
 447                                 pageY : ( ( Math.min.apply( null, valuesY ) + Math.max.apply( null, valuesY ) ) / 2 )\r
 448                         };\r
 449                 },\r
 450 \r
 451                 /**\r
 452                  * calculate the velocity between two points\r
 453                  * @param   {Number}    deltaTime\r
 454                  * @param   {Number}    deltaX\r
 455                  * @param   {Number}    deltaY\r
 456                  * @returns {Object}    velocity\r
 457                  */\r
 458                 getVelocity : function getVelocity( deltaTime, deltaX, deltaY ) {\r
 459                         return {\r
 460                                 x : ABS( deltaX / deltaTime ) || 0,\r
 461                                 y : ABS( deltaY / deltaTime ) || 0\r
 462                         };\r
 463                 },\r
 464 \r
 465                 /**\r
 466                  * calculate the angle between two coordinates\r
 467                  * @param   {Touch}     touch1\r
 468                  * @param   {Touch}     touch2\r
 469                  * @returns {Number}    angle\r
 470                  */\r
 471                 getAngle : function getAngle(touch1, touch2) {\r
 472                         var y = touch2.pageY - touch1.pageY,\r
 473                                 x = touch2.pageX - touch1.pageX;\r
 474                         return Math.atan2( y, x ) * 180 / Math.PI;\r
 475                 },\r
 476 \r
 477                 /**\r
 478                  * angle to direction define\r
 479                  * @param   {Touch}     touch1\r
 480                  * @param   {Touch}     touch2\r
 481                  * @returns {String}    direction constant, like Hammer.DIRECTION_LEFT\r
 482                  */\r
 483                 getDirection : function getDirection( touch1, touch2 ){\r
 484                         var x = touch1.pageX - touch2.pageX,\r
 485                                 y = touch1.pageY - touch2.pageY;\r
 486                         return ABS( y ) <= ABS( x ) ?\r
 487                                 ( x > 0 ? Hammer.DIRECTION_LEFT : Hammer.DIRECTION_RIGHT ) :\r
 488                                 ( y > 0 ? Hammer.DIRECTION_UP   : Hammer.DIRECTION_DOWN );\r
 489                 },\r
 490 \r
 491                 /**\r
 492                  * calculate the distance between two touches\r
 493                  * @param   {Touch}     touch1\r
 494                  * @param   {Touch}     touch2\r
 495                  * @returns {Number}    distance\r
 496                  */\r
 497                 getDistance : function getDistance( touch1, touch2 ){\r
 498                         var x = touch2.pageX - touch1.pageX,\r
 499                                 y = touch2.pageY - touch1.pageY;\r
 500                         return Math.sqrt( ( x * x ) + ( y * y ) );\r
 501                 },\r
 502 \r
 503                 /**\r
 504                  * calculate the scale factor between two touchLists (fingers)\r
 505                  * no scale is 1, and goes down to 0 when pinched together, and bigger when pinched out\r
 506                  * @param   {Array}     start\r
 507                  * @param   {Array}     end\r
 508                  * @returns {Number}    scale\r
 509                  */\r
 510                 getScale : function getScale( start, end ){\r
 511                         // need two fingers...\r
 512                         return ( 2 <= start.length && 2 <= end.length ) ?\r
 513                                 Utils.getDistance( end[ 0 ], end[ 1 ] ) / Utils.getDistance( start[ 0 ], start[ 1 ] ) :\r
 514                                 1;\r
 515                 },\r
 516 \r
 517                 /**\r
 518                  * calculate the rotation degrees between two touchLists (fingers)\r
 519                  * @param   {Array}     start\r
 520                  * @param   {Array}     end\r
 521                  * @returns {Number}    rotation\r
 522                  */\r
 523                 getRotation : function getRotation( start, end ){\r
 524                         // need two fingers\r
 525                         return ( 2 <= start.length && 2 <= end.length ) ?\r
 526                                 Utils.getAngle( end[ 1 ], end[ 0 ] ) - Utils.getAngle( start[ 1 ], start[ 0 ] ) :\r
 527                                 0;\r
 528                 },\r
 529 \r
 530                 /**\r
 531                  * boolean if the direction is vertical\r
 532                  * @param    {String}    direction\r
 533                  * @returns  {Boolean}   is_vertical\r
 534                  */\r
 535                 isVertical : function isVertical( direction ){\r
 536                         return direction === Hammer.DIRECTION_UP || direction === Hammer.DIRECTION_DOWN;\r
 537                 }\r
 538         };\r
 539         \r
 540         /**\r
 541          * this holds the last move event,\r
 542          * used to fix empty touchend issue\r
 543          * see the onTouch event for an explanation\r
 544          * @type {Object}\r
 545          */\r
 546         var last_move_event = null;\r
 547 \r
 548         /**\r
 549          * when the mouse is hold down, this is true\r
 550          * @type {Boolean}\r
 551          */\r
 552         var enable_detect = false;\r
 553 \r
 554         /**\r
 555          * when touch events have been fired, this is true\r
 556          * @type {Boolean}\r
 557          */\r
 558         var touch_triggered = false;\r
 559         \r
 560         Detection = {\r
 561                 // contains all registred Gestures in the correct order\r
 562                 gestures : [],\r
 563 \r
 564                 // data of the current Hammer.gesture detection session\r
 565                 current : null,\r
 566 \r
 567                 // the previous Hammer.gesture session data\r
 568                 // is a full clone of the previous gesture.current object\r
 569                 previous : null,\r
 570 \r
 571                 // when this becomes true, no gestures are fired\r
 572                 stopped : false,\r
 573 \r
 574                 /**\r
 575                  * clear the Hammer.gesture vars\r
 576                  * this is called on endDetect, but can also be used when a final Hammer.gesture has been detected\r
 577                  * to stop other Gestures from being fired\r
 578                  */\r
 579                 stopDetect : function stopDetect() {\r
 580                         // clone current data to the store as the previous gesture\r
 581                         // used for the double tap gesture, since this is an other gesture detect session\r
 582                         Detection.previous = Utils.extend( {}, Detection.current );\r
 583 \r
 584                         // reset the current\r
 585                         Detection.current = null;\r
 586 \r
 587                         // stopped!\r
 588                         Detection.stopped = true;\r
 589                 },\r
 590 \r
 591                 /**\r
 592                  * register new gesture\r
 593                  * @param   {Object}    gesture object, see gestures.js for documentation\r
 594                  * @returns {Array}     gestures\r
 595                  */\r
 596                 register : function( gesture ){\r
 597                         // add an enable gesture options if there is no given\r
 598                         var options = gesture.defaults || {};\r
 599                         if( options[ gesture.name ] === undefined ) options[ gesture.name ] = true;\r
 600 \r
 601                         // extend Hammer default options with the Hammer.gesture options\r
 602                         Utils.extend( Hammer.defaults, options, true );\r
 603 \r
 604                         // set its index\r
 605                         gesture.index = gesture.index || 1000;\r
 606 \r
 607                         // add Hammer.gesture to the list\r
 608                         Detection.gestures.push( gesture );\r
 609 \r
 610                         // sort the list by index\r
 611                         Detection.gestures.sort( function( a, b ){\r
 612                                 return\r
 613                                         a.index < b.index ? -1 :\r
 614                                         a.index > b.index ? 1 : 0;\r
 615                         });\r
 616                 }\r
 617         };\r
 618 \r
 619         var Gestures = Gestures || {};\r
 620 \r
 621         /**\r
 622          * Custom gestures\r
 623          * ==============================\r
 624          *\r
 625          * Gesture object\r
 626          * --------------------\r
 627          * The object structure of a gesture:\r
 628          *\r
 629          * { name: 'mygesture',\r
 630          *   index: 1337,\r
 631          *   defaults: {\r
 632          *     mygesture_option: true\r
 633          *   }\r
 634          *   handler: function(type, e, inst) {\r
 635          *     // trigger gesture event\r
 636          *     inst.trigger(this.name, e );\r
 637          *   }\r
 638          * }\r
 639 \r
 640          * @param   {String}    name\r
 641          * this should be the name of the gesture, lowercase\r
 642          * it is also being used to disable/enable the gesture per instance config.\r
 643          *\r
 644          * @param   {Number}    [index=1000]\r
 645          * the index of the gesture, where it is going to be in the stack of gestures detection\r
 646          * like when you build an gesture that depends on the drag gesture, it is a good\r
 647          * idea to place it after the index of the drag gesture.\r
 648          *\r
 649          * @param   {Object}    [defaults={}]\r
 650          * the default settings of the gesture. these are added to the instance settings,\r
 651          * and can be overruled per instance. you can also add the name of the gesture,\r
 652          * but this is also added by default (and set to true).\r
 653          *\r
 654          * @param   {Function}  handler\r
 655          * this handles the gesture detection of your custom gesture and receives the\r
 656          * following arguments:\r
 657          *\r
 658          *      @param  {Object}    eventData\r
 659          *      event data containing the following properties:\r
 660          *          timeStamp   {Number}        time the event occurred\r
 661          *          target      {HTMLElement}   target element\r
 662          *          touches     {Array}         touches (fingers, pointers, mouse) on the screen\r
 663          *          pointerType {String}        kind of pointer that was used. matches Hammer.POINTER_MOUSE|TOUCH\r
 664          *          center      {Object}        center position of the touches. contains pageX and pageY\r
 665          *          deltaTime   {Number}        the total time of the touches in the screen\r
 666          *          deltaX      {Number}        the delta on x axis we haved moved\r
 667          *          deltaY      {Number}        the delta on y axis we haved moved\r
 668          *          velocityX   {Number}        the velocity on the x\r
 669          *          velocityY   {Number}        the velocity on y\r
 670          *          angle       {Number}        the angle we are moving\r
 671          *          direction   {String}        the direction we are moving. matches Hammer.DIRECTION_UP|DOWN|LEFT|RIGHT\r
 672          *          distance    {Number}        the distance we haved moved\r
 673          *          scale       {Number}        scaling of the touches, needs 2 touches\r
 674          *          rotation    {Number}        rotation of the touches, needs 2 touches *\r
 675          *          eventType   {String}        matches Hammer.EVENT_START|MOVE|END\r
 676          *          srcEvent    {Object}        the source event, like TouchStart or MouseDown *\r
 677          *          startEvent  {Object}        contains the same properties as above,\r
 678          *                                      but from the first touch. this is used to calculate\r
 679          *                                      distances, deltaTime, scaling etc\r
 680          *\r
 681          *      @param  {Hammer.Instance}    inst\r
 682          *      the instance we are doing the detection for. you can get the options from\r
 683          *      the inst.options object and trigger the gesture event by calling inst.trigger\r
 684          *\r
 685          *\r
 686          * Handle gestures\r
 687          * --------------------\r
 688          * inside the handler you can get/set Detection.current. This is the current\r
 689          * detection session. It has the following properties\r
 690          *      @param  {String}    name\r
 691          *      contains the name of the gesture we have detected. it has not a real function,\r
 692          *      only to check in other gestures if something is detected.\r
 693          *      like in the drag gesture we set it to 'drag' and in the swipe gesture we can\r
 694          *      check if the current gesture is 'drag' by accessing Detection.current.name\r
 695          *\r
 696          *      @readonly\r
 697          *      @param  {Hammer.Instance}    inst\r
 698          *      the instance we do the detection for\r
 699          *\r
 700          *      @readonly\r
 701          *      @param  {Object}    startEvent\r
 702          *      contains the properties of the first gesture detection in this session.\r
 703          *      Used for calculations about timing, distance, etc.\r
 704          *\r
 705          *      @readonly\r
 706          *      @param  {Object}    lastEvent\r
 707          *      contains all the properties of the last gesture detect in this session.\r
 708          *\r
 709          * after the gesture detection session has been completed (user has released the screen)\r
 710          * the Detection.current object is copied into Detection.previous,\r
 711          * this is usefull for gestures like doubletap, where you need to know if the\r
 712          * previous gesture was a tap\r
 713          *\r
 714          * options that have been set by the instance can be received by calling inst.options\r
 715          *\r
 716          * You can trigger a gesture event by calling inst.trigger("mygesture", event).\r
 717          * The first param is the name of your gesture, the second the event argument\r
 718          *\r
 719          *\r
 720          * Register gestures\r
 721          * --------------------\r
 722          * When an gesture is added to the Gestures object, it is auto registered\r
 723          * at the setup of the first Hammer instance. You can also call Detection.register\r
 724          * manually and pass your gesture object as a param\r
 725          *\r
 726          */\r
 727 \r
 728         /**\r
 729          * Hold\r
 730          * Touch stays at the same place for x time\r
 731          * @events  hold holdend\r
 732          */\r
 733         Gestures.Hold = {\r
 734                 name  : 'hold',\r
 735                 index : 10,\r
 736                 startID : X.UI.Event.HOLD,\r
 737                 endID   : X.UI.Event.HOLD_END,\r
 738                 defaults : {\r
 739                         hold_timeout   : 500,\r
 740                         hold_threshold : 1\r
 741                 },\r
 742                 timerID : null,\r
 743                 holding : false,\r
 744                 handler : function holdGesture( e, hammer ){\r
 745                         switch( e.eventType ){\r
 746                                 case START :\r
 747                                         // clear any running timers\r
 748                                         this.timerID && X.Timer.remove( this.timerID );\r
 749 \r
 750                                         // set the gesture so we can check in the timeout if it still is\r
 751                                         Detection.current.name = this.name;\r
 752                                         Gestures.Hold.holding = false;\r
 753                                         \r
 754                                         // set timer and if after the timeout it still is hold,\r
 755                                         // we trigger the hold event\r
 756                                         this.timerID = X.Timer.add( hammer.options.hold_timeout, 1, Gestures.Hold._onTimer, [ e, hammer ] );\r
 757                                         return;\r
 758 \r
 759                                 // when you move or end we clear the timer\r
 760                                 case MOVE :\r
 761                                         if( e.distance <= hammer.options.hold_threshold ) return;\r
 762                                 case END :\r
 763                                         this.timerID && X.Timer.remove( this.timerID );\r
 764                                         if( Gestures.Hold.holding === true ){\r
 765                                                 Gestures.Hold.holding = false;\r
 766                                                 return hammer.trigger( X.UI.Event.HOLD_END, e );\r
 767                                         };\r
 768                                         break;\r
 769                         };\r
 770                 },\r
 771                 _onTimer : function( e, hammer ){\r
 772                         if( Detection.current.name === 'hold' ){\r
 773                                 hammer.trigger( X.UI.Event.HOLD, e );\r
 774                                 Gestures.Hold.holding = true;\r
 775                         };\r
 776                 }\r
 777         };\r
 778 \r
 779         /**\r
 780          * Tap/DoubleTap\r
 781          * Quick touch at a place or double at the same place\r
 782          * @events  tap, doubletap\r
 783          */\r
 784         Gestures.Tap = {\r
 785                 name     : 'tap',\r
 786                 index    : 100,\r
 787                 startID  : X.UI.Event.TAP,\r
 788                 endID    : X.UI.Event.DOUBLE_TAP,\r
 789                 defaults : {\r
 790                         tap_max_touchtime  : 250,\r
 791                         tap_max_distance   : 10,\r
 792                         tap_always         : true,\r
 793                         doubletap_distance : 20,\r
 794                         doubletap_interval : 300\r
 795                 },\r
 796                 handler : function tapGesture( e, hammer ){\r
 797                         // previous gesture, for the double tap since these are two different gesture detections\r
 798                         var prev = Detection.previous;\r
 799                         if( e.eventType === END ){\r
 800                                 // when the touchtime is higher then the max touch time\r
 801                                 // or when the moving distance is too much\r
 802                                 if( hammer.options.tap_max_touchtime < e.deltaTime || hammer.options.tap_max_distance < e.distance ) return;\r
 803 \r
 804                                 // check if double tap\r
 805                                 if( prev && prev.name === 'tap' && ( e.timeStamp - prev.lastEvent.timeStamp ) < hammer.options.doubletap_interval && e.distance < hammer.options.doubletap_distance ){\r
 806                                         return hammer.trigger( X.UI.Event.DOUBLE_TAP, e );\r
 807                                 } else\r
 808                                 // do a single tap\r
 809                                 if( hammer.options.tap_always ){\r
 810                                         Detection.current.name = 'tap';\r
 811                                         return hammer.trigger(  X.UI.Event.TAP, e );\r
 812                                 };\r
 813                         };\r
 814                 }\r
 815         };\r
 816 \r
 817         /**\r
 818          * Swipe\r
 819          * triggers swipe events when the end velocity is above the threshold\r
 820          * @events  swipe, swipeleft, swiperight, swipeup, swipedown\r
 821          */\r
 822         Gestures.Swipe = {\r
 823                 name : 'swipe',\r
 824                 index : 40,\r
 825                 startID  : X.UI.Event.SWIP,\r
 826                 endID    : X.UI.Event.SWIP_DOWN,\r
 827                 defaults : {\r
 828                         // set 0 for unlimited, but this can conflict with transform\r
 829                         swipe_max_touches : 1,\r
 830                         swipe_velocity : 0.7\r
 831                 },\r
 832                 handler : function swipeGesture(e, hammer) {\r
 833                         if( e.eventType === END ){\r
 834                                 // max touches\r
 835                                 if( 0 < hammer.options.swipe_max_touches && hammer.options.swipe_max_touches < e.touches.length ) return;\r
 836 \r
 837                                 // when the distance we moved is too small we skip this gesture\r
 838                                 // or we can be already in dragging\r
 839                                 if( hammer.options.swipe_velocity < e.velocityX || hammer.options.swipe_velocity < e.velocityY ){\r
 840                                         // trigger swipe events\r
 841                                         hammer.trigger( X.UI.Event.SWIP, e );\r
 842                                         hammer.trigger(\r
 843                                                 e.direction === Hammer.DIRECTION_UP ?\r
 844                                                         X.UI.Event.SWIP_UP :\r
 845                                                 e.direction === Hammer.DIRECTION_DOWN ?\r
 846                                                         X.UI.Event.SWIP_DOWN :\r
 847                                                 e.direction === Hammer.DIRECTION_LEFT ?\r
 848                                                         X.UI.Event.SWIP_LEFT :\r
 849                                                         X.UI.Event.SWIP_RIGHT,\r
 850                                                 e\r
 851                                         );\r
 852                                 };\r
 853                         };\r
 854                 }\r
 855         };\r
 856 \r
 857         /**\r
 858          * Drag\r
 859          * Move with x fingers (default 1) around on the page. Blocking the scrolling when\r
 860          * moving left and right is a good practice. When all the drag events are blocking\r
 861          * you disable scrolling on that area.\r
 862          * @events  drag, dragstart, dragend, drapleft, dragright, dragup, dragdown\r
 863          */\r
 864         Gestures.Drag = {\r
 865                 name : 'drag',\r
 866                 index : 50,\r
 867                 startID  : X.UI.Event.DRAG,\r
 868                 endID    : X.UI.Event.DRAG_DOWN,\r
 869                 defaults : {\r
 870                         drag_min_distance : 10,\r
 871                         // set 0 for unlimited, but this can conflict with transform\r
 872                         drag_max_touches : 1,\r
 873                         // prevent default browser behavior when dragging occurs\r
 874                         // be careful with it, it makes the element a blocking element\r
 875                         // when you are using the drag gesture, it is a good practice to set this true\r
 876                         drag_block_horizontal : false,\r
 877                         drag_block_vertical : false,\r
 878                         // drag_lock_to_axis keeps the drag gesture on the axis that it started on,\r
 879                         // It disallows vertical directions if the initial direction was horizontal, and vice versa.\r
 880                         drag_lock_to_axis : false,\r
 881                         // drag lock only kicks in when distance > drag_lock_min_distance\r
 882                         // This way, locking occurs only when the distance has become large enough to reliably determine the direction\r
 883                         drag_lock_min_distance : 25\r
 884                 },\r
 885                 triggered : false,\r
 886                 handler : function dragGesture( e, hammer ){\r
 887                         var last_direction;\r
 888                         // current gesture isnt drag, but dragged is true\r
 889                         // this means an other gesture is busy. now call dragend\r
 890                         if( Detection.current.name !== this.name && this.triggered ){\r
 891                                 hammer.trigger( X.UI.Event.DRAG_END, e );\r
 892                                 this.triggered = false;\r
 893                                 return;\r
 894                         };\r
 895 \r
 896                         // max touches\r
 897                         if( 0 < hammer.options.drag_max_touches && hammer.options.drag_max_touches < e.touches.length ) return;\r
 898 \r
 899                         switch( e.eventType ){\r
 900                                 case START:\r
 901                                         this.triggered = false;\r
 902                                         break;\r
 903 \r
 904                                 case MOVE :\r
 905                                         // when the distance we moved is too small we skip this gesture\r
 906                                         // or we can be already in dragging\r
 907                                         if( e.distance < hammer.options.drag_min_distance && Detection.current.name !== this.name ) return;\r
 908 \r
 909                                         // we are dragging!\r
 910                                         Detection.current.name = this.name;\r
 911 \r
 912                                         // lock drag to axis?\r
 913                                         if( Detection.current.lastEvent.drag_locked_to_axis || ( hammer.options.drag_lock_to_axis && hammer.options.drag_lock_min_distance <= e.distance ) ){\r
 914                                                 e.drag_locked_to_axis = true;\r
 915                                         };\r
 916                                         last_direction = Detection.current.lastEvent.direction;\r
 917                                         if( e.drag_locked_to_axis && last_direction !== e.direction ){\r
 918                                                 // keep direction on the axis that the drag gesture started on\r
 919                                                 e.direction = Utils.isVertical( last_direction ) ?\r
 920                                                         ( e.deltaY < 0 ? Hammer.DIRECTION_UP   : Hammer.DIRECTION_DOWN ) :\r
 921                                                         ( e.deltaX < 0 ? Hammer.DIRECTION_LEFT : Hammer.DIRECTION_RIGHT );\r
 922                                         };\r
 923 \r
 924                                         // first time, trigger dragstart event\r
 925                                         if( !this.triggered ){\r
 926                                                 hammer.trigger( X.UI.Event.DRAG_START, e );\r
 927                                                 this.triggered = true;\r
 928                                         };\r
 929 \r
 930                                         // trigger normal event\r
 931                                         hammer.trigger( X.UI.Event.DRAG, e );\r
 932 \r
 933                                         // direction event, like dragdown\r
 934                                         hammer.trigger(\r
 935                                                 e.direction === Hammer.DIRECTION_UP ?\r
 936                                                         X.UI.Event.DRAG_UP :\r
 937                                                 e.direction === Hammer.DIRECTION_DOWN ?\r
 938                                                         X.UI.Event.DRAG_DOWN :\r
 939                                                 e.direction === Hammer.DIRECTION_LEFT ?\r
 940                                                         X.UI.Event.DRAG_LEFT :\r
 941                                                         X.UI.Event.DRAG_RIGHT,\r
 942                                                 e\r
 943                                         );\r
 944 \r
 945                                         // block the browser events\r
 946                                         (\r
 947                                                 ( hammer.options.drag_block_vertical   &&  Utils.isVertical( e.direction ) ) ||\r
 948                                                 ( hammer.options.drag_block_horizontal && !Utils.isVertical( e.direction ) )\r
 949                                         ) && e.preventDefault();\r
 950                                         break;\r
 951 \r
 952                                 case END:\r
 953                                         // trigger dragend\r
 954                                         this.triggered && hammer.trigger( X.UI.Event.DRAG_END, e );\r
 955                                         this.triggered = false;\r
 956                                         break;\r
 957                         }\r
 958                 }\r
 959         };\r
 960 \r
 961         /**\r
 962          * Transform\r
 963          * User want to scale or rotate with 2 fingers\r
 964          * @events  transform, transformstart, transformend, pinch, pinchin, pinchout, rotate\r
 965          */\r
 966         Gestures.Transform = {\r
 967                 name : 'transform',\r
 968                 index : 45,\r
 969                 startID  : X.UI.Event.TRANSFORM,\r
 970                 endID    : X.UI.Event.ROTATE,\r
 971                 defaults : {\r
 972                         // factor, no scale is 1, zoomin is to 0 and zoomout until higher then 1\r
 973                         transform_min_scale : 0.01,\r
 974                         // rotation in degrees\r
 975                         transform_min_rotation : 1,\r
 976                         // prevent default browser behavior when two touches are on the screen\r
 977                         // but it makes the element a blocking element\r
 978                         // when you are using the transform gesture, it is a good practice to set this true\r
 979                         transform_always_block : false\r
 980                 },\r
 981                 triggered : false,\r
 982                 handler : function transformGesture( e, hammer ){\r
 983                         // current gesture isnt drag, but dragged is true\r
 984                         // this means an other gesture is busy. now call dragend\r
 985                         if( Detection.current.name !== this.name && this.triggered ){\r
 986                                 hammer.trigger( X.UI.Event.TRANSFORM_END, e );\r
 987                                 this.triggered = false;\r
 988                                 return;\r
 989                         };\r
 990 \r
 991                         // atleast multitouch\r
 992                         if( e.touches.length < 2 ) return;\r
 993 \r
 994                         // prevent default when two fingers are on the screen\r
 995                         hammer.options.transform_always_block && e.preventDefault();\r
 996 \r
 997                         switch(e.eventType) {\r
 998                                 case START:\r
 999                                         this.triggered = false;\r
1000                                         break;\r
1001 \r
1002                                 case MOVE:\r
1003                                         var scale_threshold    = ABS( 1 - e.scale ),\r
1004                                                 rotation_threshold = ABS( e.rotation );\r
1005 \r
1006                                         // when the distance we moved is too small we skip this gesture\r
1007                                         // or we can be already in dragging\r
1008                                         if( scale_threshold < hammer.options.transform_min_scale && rotation_threshold < hammer.options.transform_min_rotation ) return;\r
1009 \r
1010                                         // we are transforming!\r
1011                                         Detection.current.name = this.name;\r
1012 \r
1013                                         // first time, trigger dragstart event\r
1014                                         if( !this.triggered ){\r
1015                                                 hammer.trigger( X.UI.Event.TRANSFORM_START, e );\r
1016                                                 this.triggered = true;\r
1017                                         };\r
1018 \r
1019                                         hammer.trigger( X.UI.Event.TRANSFORM, e );\r
1020                                         // basic transform event\r
1021 \r
1022                                         // trigger rotate event\r
1023                                         hammer.options.transform_min_rotation < rotation_threshold && hammer.trigger( X.UI.Event.ROTATE, e );\r
1024 \r
1025                                         // trigger pinch event\r
1026                                         if( scale_threshold > hammer.options.transform_min_scale ){\r
1027                                                 hammer.trigger( X.UI.Event.PINCH, e );\r
1028                                                 hammer.trigger( e.scale < 1 ? X.UI.Event.PINCH_IN : X.UI.Event.PINCH_OUT, e );\r
1029                                         };\r
1030                                         break;\r
1031 \r
1032                                 case END:\r
1033                                         // trigger dragend\r
1034                                         this.triggered && hammer.trigger( X.UI.Event.TRANSFORM_END, e );\r
1035                                         this.triggered = false;\r
1036                                         break;\r
1037                         };\r
1038                 }\r
1039         };\r
1040 \r
1041         /**\r
1042          * Touch\r
1043          * Called as first, tells the user has touched the screen\r
1044          * @events  touch\r
1045          */\r
1046         Gestures.Touch = {\r
1047                 name : 'touch',\r
1048                 index : -Infinity,\r
1049                 defaults : {\r
1050                         // call preventDefault at touchstart, and makes the element blocking by\r
1051                         // disabling the scrolling of the page, but it improves gestures like\r
1052                         // transforming and dragging.\r
1053                         // be careful with using this, it can be very annoying for users to be stuck\r
1054                         // on the page\r
1055                         prevent_default : false,\r
1056 \r
1057                         // disable mouse events, so only touch (or pen!) input triggers events\r
1058                         prevent_mouseevents : false\r
1059                 },\r
1060                 handler : function touchGesture( e, hammer ){\r
1061                         if( hammer.options.prevent_mouseevents && e.pointerType === MOUSE ){\r
1062                                 Detection.stopDetect();\r
1063                                 return;\r
1064                         };\r
1065 \r
1066                         hammer.options.prevent_default && e.preventDefault();\r
1067 \r
1068                         e.eventType === START && hammer.trigger( this.name, e );\r
1069                 }\r
1070         };\r
1071 \r
1072         /**\r
1073          * Release\r
1074          * Called as last, tells the user has released the screen\r
1075          * @events  release\r
1076          */\r
1077         Gestures.Release = {\r
1078                 name : 'release',\r
1079                 index : Infinity,\r
1080                 handler : function releaseGesture( e, hammer ){\r
1081                         e.eventType === END && hammer.trigger( this.name, e );\r
1082                 }\r
1083         };\r
1084         \r
1085 })( Math, window, document );