/* * touchSwipe - jQuery Plugin * https://github.com/mattbryson/TouchSwipe-Jquery-Plugin * http://labs.skinkers.com/touchSwipe/ * http://plugins.jquery.com/project/touchSwipe * * Copyright (c) 2010 Matt Bryson (www.skinkers.com) * Dual licensed under the MIT or GPL Version 2 licenses. * * $version: 1.5.2 * * Changelog * $Date: 2010-12-12 (Wed, 12 Dec 2010) $ * $version: 1.0.0 * $version: 1.0.1 - removed multibyte comments * * $Date: 2011-21-02 (Mon, 21 Feb 2011) $ * $version: 1.1.0 - added allowPageScroll property to allow swiping and scrolling of page * - changed handler signatures so one handler can be used for multiple events * $Date: 2011-23-02 (Wed, 23 Feb 2011) $ * $version: 1.2.0 - added click handler. This is fired if the user simply clicks and does not swipe. The event object and click target are passed to handler. * - If you use the http://code.google.com/p/jquery-ui-for-ipad-and-iphone/ plugin, you can also assign jQuery mouse events to children of a touchSwipe object. * $version: 1.2.1 - removed console log! * * $version: 1.2.2 - Fixed bug where scope was not preserved in callback methods. * * $Date: 2011-28-04 (Thurs, 28 April 2011) $ * $version: 1.2.4 - Changed licence terms to be MIT or GPL inline with jQuery. Added check for support of touch events to stop non compatible browsers erroring. * * $Date: 2011-27-09 (Tues, 27 September 2011) $ * $version: 1.2.5 - Added support for testing swipes with mouse on desktop browser (thanks to https://github.com/joelhy) * * $Date: 2012-14-05 (Mon, 14 May 2012) $ * $version: 1.2.6 - Added timeThreshold between start and end touch, so user can ignore slow swipes (thanks to Mark Chase). Default is null, all swipes are detected * * $Date: 2012-05-06 (Tues, 05 June 2012) $ * $version: 1.2.7 - Changed time threshold to have null default for backwards compatibility. Added duration param passed back in events, and refactored how time is handled. * * $Date: 2012-05-06 (Tues, 05 June 2012) $ * $version: 1.2.8 - Added the possibility to return a value like null or false in the trigger callback. In that way we can control when the touch start/move should take effect or not (simply by returning in some cases return null; or return false;) This effects the ontouchstart/ontouchmove event. * * $Date: 2012-06-06 (Wed, 06 June 2012) $ * $version: 1.3.0 - Refactored whole plugin to allow for methods to be executed, as well as exposed defaults for user override. Added 'enable', 'disable', and 'destroy' methods * * $Date: 2012-05-06 (Fri, 05 June 2012) $ * $version: 1.3.1 - Bug fixes - bind() with false as last argument is no longer supported in jQuery 1.6, also, if you just click, the duration is now returned correctly. * * $Date: 2012-29-07 (Sun, 29 July 2012) $ * $version: 1.3.2 - Added fallbackToMouseEvents option to NOT capture mouse events on non touch devices. * - Added "all" fingers value to the fingers property, so any combinatin of fingers triggers the swipe, allowing event handlers to check the finger count * * $Date: 2012-09-08 (Thurs, 9 Aug 2012) $ * $version: 1.3.3 - Code tidy prep for minified version * * $Date: 2012-04-10 (wed, 4 Oct 2012) $ * $version: 1.4.0 - Added pinch support, pinchIn and pinchOut * * $Date: 2012-11-10 (Thurs, 11 Oct 2012) $ * $version: 1.5.0 - Added excludedElements, a jquery selector that specifies child elements that do NOT trigger swipes. By default, this is one select that removes all form, input select, button and anchor elements. * * $Date: 2012-22-10 (Mon, 22 Oct 2012) $ * $version: 1.5.1 - Fixed bug with jQuery 1.8 and trailing comma in excludedElements * - Fixed bug with IE and eventPreventDefault() * $Date: 2013-01-12 (Fri, 12 Jan 2013) $ * $version: 1.5.2 - Fixed bugs with pinching, mainly when both pinch and swipe enabled, as well as adding time threshold for multifinger gestures, so releasing one finger beofre the other doesnt trigger as single finger gesture. * * A jQuery plugin to capture left, right, up and down swipes on touch devices. * You can capture 2 finger or 1 finger swipes, set the threshold and define either a catch all handler, or individual direction handlers. * Options: The defaults can be overridden by setting them in $.fn.swipe.defaults * swipe Function A catch all handler that is triggered for all swipe directions. Handler is passed 3 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down" , the distance of the swipe, the duration of the swipe and the finger count. * swipeLeft Function A handler that is triggered for "left" swipes. Handler is passed 3 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down" , the distance of the swipe, the duration of the swipe and the finger count. * swipeRight Function A handler that is triggered for "right" swipes. Handler is passed 3 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down" , the distance of the swipe, the duration of the swipe and the finger count. * swipeUp Function A handler that is triggered for "up" swipes. Handler is passed 3 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down" , the distance of the swipe, the duration of the swipe and the finger count. * swipeDown Function A handler that is triggered for "down" swipes. Handler is passed 3 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down" , the distance of the swipe, the duration of the swipe and the finger count. * swipeStatus Function A handler triggered for every phase of the swipe. Handler is passed 4 arguments: event : The original event object, phase:The current swipe phase, either "start", "move", "end" or "cancel". direction : The swipe direction, either "up?, "down?, "left " or "right?.distance : The distance of the swipe.Duration : The duration of the swipe : The finger count * * pinchIn Function A handler triggered when the user pinch zooms inward. Handler is passed * pinchOut Function A handler triggered when the user pinch zooms outward. Handler is passed * pinchStatus Function A handler triggered for every phase of a pinch. Handler is passed 4 arguments: event : The original event object, phase:The current swipe face, either "start", "move", "end" or "cancel". direction : The swipe direction, either "in" or "out". distance : The distance of the pinch, zoom: the pinch zoom level * * click Function A handler triggered when a user just clicks on the item, rather than swipes it. If they do not move, click is triggered, if they do move, it is not. * * fingers int Default 1. The number of fingers to trigger the swipe, 1 or 2. * threshold int Default 75. The number of pixels that the user must move their finger by before it is considered a swipe. * pinchThreshold int Default 5. The number of pixels that the user must pinch their finger by before it is considered a pinch. Default is 5. * maxTimeThreshold int Default null. Time, in milliseconds, between touchStart and touchEnd must NOT exceed in order to be considered a swipe. * fingerReleaseThreshold int Default:250. Milliseconds threshold between releasing multiple fingers. If 2 fingers are down, and are released one after the other, if they are within this threshold, it counts as a simultaneous release. * triggerOnTouchEnd Boolean Default true If true, the swipe events are triggered when the touch end event is received (user releases finger). If false, it will be triggered on reaching the threshold, and then cancel the touch event automatically. * allowPageScroll String Default "auto". How the browser handles page scrolls when the user is swiping on a touchSwipe object. * "auto" : all undefined swipes will cause the page to scroll in that direction. * "none" : the page will not scroll when user swipes. * "horizontal" : will force page to scroll on horizontal swipes. * "vertical" : will force page to scroll on vertical swipes. * fallbackToMouseEvents Boolean Default true if true mouse events are used when run on a non touch device, false will stop swipes being triggered by mouse events on non tocuh devices * * excludedElements String jquery selector that specifies child elements that do NOT trigger swipes. By default, this is one select that removes all input, select, textarea, button and anchor elements as well as any .noSwipe classes. * * Methods: To be executed as strings, $el.swipe('disable'); * disable Will disable all touch events until enabled again * enable Will re-enable the touch events * destroy Will kill the plugin, and it must be re-instantiated if it needs to be used again * * This jQuery plugin will only run on devices running Mobile Webkit based browsers (iOS 2.0+, android 2.2+) */ (function ($) { //Constants var LEFT = "left", RIGHT = "right", UP = "up", DOWN = "down", IN = "in", OUT = "out", NONE = "none", AUTO = "auto", SWIPE = "swipe", PINCH = "pinch", CLICK = "click", HORIZONTAL = "horizontal", VERTICAL = "vertical", ALL_FINGERS = "all", PHASE_START = "start", PHASE_MOVE = "move", PHASE_END = "end", PHASE_CANCEL = "cancel", SUPPORTS_TOUCH = 'ontouchstart' in window, PLUGIN_NS = 'TouchSwipe'; // Default thresholds & swipe functions var defaults = { fingers: 1, // int - The number of fingers to trigger the swipe, 1 or 2. Default is 1. threshold: 75, // int - The number of pixels that the user must move their finger by before it is considered a swipe. Default is 75. pinchThreshold:20, // int - The number of pixels that the user must pinch their finger by before it is considered a pinch. Default is 5. maxTimeThreshold: null, // int - Time, in milliseconds, between touchStart and touchEnd must NOT exceed in order to be considered a swipe. swipe: null, // Function - A catch all handler that is triggered for all swipe directions. Accepts 2 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down", and the finger count. swipeLeft: null, // Function - A handler that is triggered for "left" swipes. Accepts 3 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down", the distance of the swipe, and the finger count. swipeRight: null, // Function - A handler that is triggered for "right" swipes. Accepts 3 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down", the distance of the swipe, and the finger count. swipeUp: null, // Function - A handler that is triggered for "up" swipes. Accepts 3 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down", the distance of the swipe, and the finger count. swipeDown: null, // Function - A handler that is triggered for "down" swipes. Accepts 3 arguments, the original event object, the direction of the swipe : "left", "right", "up", "down", the distance of the swipe, and the finger count. swipeStatus: null, // Function - A handler triggered for every phase of the swipe. Handler is passed 4 arguments: event : The original event object, phase:The current swipe phase, either "start, "move, "end or "cancel. direction : The swipe direction, either "up", "down", "left" or "right". distance : The distance of the swipe, fingerCount: The finger count. pinchIn:null, // Function - A handler triggered for pinch in events. Handler is passed 4 arguments: event : The original event object, direction : The swipe direction, either "in" or "out". distance : The distance of the pinch, zoom: the pinch zoom level pinchOut:null, // Function - A handler triggered for pinch in events. Handler is passed 4 arguments: event : The original event object, direction : The swipe direction, either "in" or "out". distance : The distance of the pinch, zoom: the pinch zoom level pinchStatus:null, // Function - A handler triggered for every phase of a pinch. Handler is passed 4 arguments: event : The original event object, phase:The current swipe face, either "start", "move", "end" or "cancel". direction : The swipe direction, either "in" or "out". distance : The distance of the pinch, zoom: the pinch zoom level fingerReleaseThreshold:250, // int - Milliseconds threshold between releasing multiple fingers. If 2 fingers are down, and are released one after the other, if they are within this threshold, it counts as a simultaneous release. click: null, // Function - A handler triggered when a user just clicks on the item, rather than swipes it. If they do not move, click is triggered, if they do move, it is not. triggerOnTouchEnd: true, // Boolean, if true, the swipe events are triggered when the touch end event is received (user releases finger). If false, it will be triggered on reaching the threshold, and then cancel the touch event automatically. allowPageScroll: "auto", /* How the browser handles page scrolls when the user is swiping on a touchSwipe object. "auto" : all undefined swipes will cause the page to scroll in that direction. "none" : the page will not scroll when user swipes. "horizontal" : will force page to scroll on horizontal swipes. "vertical" : will force page to scroll on vertical swipes. */ fallbackToMouseEvents: true, //Boolean, if true mouse events are used when run on a non touch device, false will stop swipes being triggered by mouse events on non tocuh devices excludedElements:"button, input, select, textarea, a, .noSwipe" //a jquery selector that specifies child elements that do NOT trigger swipes. By default, this is one select that removes all form, input select, button and anchor elements. }; /** * Main plugin entry point for jQuery * This allows us to pass options object for instantiation, * as well as execute methods by name as per jQuery plugin architecture */ $.fn.swipe = function (method) { var $this = $(this), plugin = $this.data(PLUGIN_NS); //Check if we are already instantiated and trying to execute a method if (plugin && typeof method === 'string') { if (plugin[method]) { return plugin[method].apply(this, Array.prototype.slice.call(arguments, 1)); } else { $.error('Method ' + method + ' does not exist on jQuery.swipe'); } } //Else not instantiated and trying to pass init object (or nothing) else if (!plugin && (typeof method === 'object' || !method)) { return init.apply(this, arguments); } return $this; }; //Expose our defaults so a user could override the plugin defaults $.fn.swipe.defaults = defaults; //Expose our phase constants - READ ONLY $.fn.swipe.phases = { PHASE_START: PHASE_START, PHASE_MOVE: PHASE_MOVE, PHASE_END: PHASE_END, PHASE_CANCEL: PHASE_CANCEL }; //Expose our direction constants - READ ONLY $.fn.swipe.directions = { LEFT: LEFT, RIGHT: RIGHT, UP: UP, DOWN: DOWN, IN : IN, OUT: OUT }; //Expose our page scroll directions - READ ONLY $.fn.swipe.pageScroll = { NONE: NONE, HORIZONTAL: HORIZONTAL, VERTICAL: VERTICAL, AUTO: AUTO }; //EXPOSE our fingers values - READ ONLY $.fn.swipe.fingers = { ONE: 1, TWO: 2, THREE: 3, ALL: ALL_FINGERS }; /** * Initialise the plugin for each DOM element matched * This creates a new instance of the main TouchSwipe class for each DOM element, and then * saves a reference to that instance in the elements data property. */ function init(options) { //Prep and extend the options if (options && (options.allowPageScroll === undefined && (options.swipe !== undefined || options.swipeStatus !== undefined))) { options.allowPageScroll = NONE; } if (!options) { options = {}; } //pass empty object so we dont modify the defaults options = $.extend({}, $.fn.swipe.defaults, options); //For each element instantiate the plugin return this.each(function () { var $this = $(this); //Check we havent already initialised the plugin var plugin = $this.data(PLUGIN_NS); if (!plugin) { plugin = new touchSwipe(this, options); $this.data(PLUGIN_NS, plugin); } }); } /** * Main TouchSwipe Plugin Class */ function touchSwipe(element, options) { var useTouchEvents = (SUPPORTS_TOUCH || !options.fallbackToMouseEvents), START_EV = useTouchEvents ? 'touchstart' : 'mousedown', MOVE_EV = useTouchEvents ? 'touchmove' : 'mousemove', END_EV = useTouchEvents ? 'touchend' : 'mouseup', CANCEL_EV = 'touchcancel'; var distance = 0; var direction = null; var duration = 0; var startTouchesDistance=0; var endTouchesDistance=0; var pinchZoom = 1; var pinchDirection=0; //jQuery wrapped element for this instance var $element = $(element); var phase = "start"; var fingerCount = 0; // the current number of fingers being used. //track mouse points / delta var fingerData=null; //track times var startTime = 0; var endTime = 0; var previousEndTime=0; var previousFingerCount=0; // Add gestures to all swipable areas if supported try { $element.bind(START_EV, touchStart); $element.bind(CANCEL_EV, touchCancel); } catch (e) { $.error('events not supported ' + START_EV + ',' + CANCEL_EV + ' on jQuery.swipe'); } //Public methods /** * re-enables the swipe plugin with the previous configuration */ this.enable = function () { $element.bind(START_EV, touchStart); $element.bind(CANCEL_EV, touchCancel); return $element; }; /** * disables the swipe plugin */ this.disable = function () { removeListeners(); return $element; }; /** * Destroy the swipe plugin completely. To use any swipe methods, you must re initialise the plugin. */ this.destroy = function () { removeListeners(); $element.data(PLUGIN_NS, null); return $element; }; //Private methods /** * Event handler for a touch start event. * Stops the default click event from triggering and stores where we touched */ function touchStart(jqEvent) { //If we already in a touch event (a finger already in use) then ignore subsequent ones.. if( getTouchInProgress() ) return; //Check if this element matches any in the excluded elements selectors, or its parent is excluded, if so, DONT swipe if( $(jqEvent.target).closest( options.excludedElements, $element ).length>0 ) return; //As we use Jquery bind for events, we need to target the original event object var event = jqEvent.originalEvent; var ret, evt = SUPPORTS_TOUCH ? event.touches[0] : event; phase = PHASE_START; //If we support touches, get the finger count if (SUPPORTS_TOUCH) { // get the total number of fingers touching the screen fingerCount = event.touches.length; } //Else this is the desktop, so stop the browser from dragging the image else { jqEvent.preventDefault(); //call this on jq event so we are cross browser } //clear vars.. distance = 0; direction = null; pinchDirection=null; duration = 0; startTouchesDistance=0; endTouchesDistance=0; pinchZoom = 1; pinchDistance = 0; fingerData=createAllFingerData(); // check the number of fingers is what we are looking for, or we are capturing pinches if (!SUPPORTS_TOUCH || (fingerCount === options.fingers || options.fingers === ALL_FINGERS) || hasPinches()) { // get the coordinates of the touch createFingerData( 0, evt ); startTime = getTimeStamp(); if(fingerCount==2) { //Keep track of the initial pinch distance, so we can calculate the diff later //Store second finger data as start createFingerData( 1, event.touches[1] ); startTouchesDistance = endTouchesDistance = calculateTouchesDistance(fingerData[0].start, fingerData[1].start); } if (options.swipeStatus || options.pinchStatus) { ret = triggerHandler(event, phase); } } else { //A touch with more or less than the fingers we are looking for, so cancel touchCancel(event); ret = false; // actualy cancel so we dont register event... } //If we have a return value from the users handler, then return and cancel if (ret === false) { phase = PHASE_CANCEL; triggerHandler(event, phase); return ret; } else { setTouchInProgress(true); $element.bind(MOVE_EV, touchMove); $element.bind(END_EV, touchEnd); } }; /** * Event handler for a touch move event. * If we change fingers during move, then cancel the event */ function touchMove(jqEvent) { //As we use Jquery bind for events, we need to target the original event object var event = jqEvent.originalEvent; if (phase === PHASE_END || phase === PHASE_CANCEL) return; var ret, evt = SUPPORTS_TOUCH ? event.touches[0] : event; //Update the finger data var currentFinger = updateFingerData(evt); endTime = getTimeStamp(); if (SUPPORTS_TOUCH) { fingerCount = event.touches.length; } phase = PHASE_MOVE; //If we have 2 fingers get Touches distance as well if(fingerCount==2) { //Keep track of the initial pinch distance, so we can calculate the diff later //We do this here as well as the start event, incase they start with 1 finger, and the press 2 fingers if(startTouchesDistance==0) { //Create second finger if this is the first time... createFingerData( 1, event.touches[1] ); startTouchesDistance = endTouchesDistance = calculateTouchesDistance(fingerData[0].start, fingerData[1].start); } else { //Else just update the second finger updateFingerData(event.touches[1]); endTouchesDistance = calculateTouchesDistance(fingerData[0].end, fingerData[1].end); pinchDirection = calculatePinchDirection(fingerData[0].end, fingerData[1].end); } pinchZoom = calculatePinchZoom(startTouchesDistance, endTouchesDistance); pinchDistance = Math.abs(startTouchesDistance - endTouchesDistance); } if ( (fingerCount === options.fingers || options.fingers === ALL_FINGERS) || !SUPPORTS_TOUCH || hasPinches() ) { direction = calculateDirection(currentFinger.start, currentFinger.end); //Check if we need to prevent default evnet (page scroll / pinch zoom) or not validateDefaultEvent(jqEvent, direction); //Distance and duration are all off the main finger distance = calculateDistance(currentFinger.start, currentFinger.end); duration = calculateDuration(); if (options.swipeStatus || options.pinchStatus) { ret = triggerHandler(event, phase); } //If we trigger whilst dragging, not on touch end, then calculate now... if (!options.triggerOnTouchEnd) { var cancel = !validateSwipeTime(); // if the user swiped more than the minimum length, perform the appropriate action if (validateSwipeDistance() === true) { phase = PHASE_END; ret = triggerHandler(event, phase); } else if (cancel) { phase = PHASE_CANCEL; triggerHandler(event, phase); } } } else { phase = PHASE_CANCEL; triggerHandler(event, phase); } if (ret === false) { phase = PHASE_CANCEL; triggerHandler(event, phase); } } /** * Event handler for a touch end event. * Calculate the direction and trigger events */ function touchEnd(jqEvent) { //As we use Jquery bind for events, we need to target the original event object var event = jqEvent.originalEvent; //If we are still in a touch another finger is down, then dont cancel if(event.touches && event.touches.length>0) { previousEndTime = getTimeStamp(); previousFingerCount = event.touches.length+1; return true; } //If we have a previous end event that has fired, check the threshold to see if we shuld count it as part of this end as well //This is used to allow 2 fingers to release fractionally after each other, whilst maintainig the event as containg 2 fingers, not 1 if(previousEndTime) { var diff = getTimeStamp() - previousEndTime if( diff<=options.fingerReleaseThreshold ) { fingerCount=previousFingerCount; } } //call this on jq event so we are cross browser jqEvent.preventDefault(); //Set end of swipe endTime = getTimeStamp(); //If we trigger handlers at end of swipe OR, we trigger during, but they didnt trigger and we are still in the move phase if (options.triggerOnTouchEnd || (options.triggerOnTouchEnd === false && phase === PHASE_MOVE)) { phase = PHASE_END; //The number of fingers we want were matched, or on desktop we ignore var hasCorrectFingerCount = ((fingerCount === options.fingers || options.fingers === ALL_FINGERS) || !SUPPORTS_TOUCH); //We have an end value for the finger var hasEndPoint = fingerData[0].end.x !== 0; //Check if the above conditions are met to make this swipe count... var isSwipe = hasCorrectFingerCount && hasEndPoint && (didPinch() || didSwipe()); //If we are in a swipe, validate the time and distance... if (isSwipe) { triggerHandler(event, phase); } else { phase = PHASE_CANCEL; triggerHandler(event, phase); } } else if (phase === PHASE_MOVE) { phase = PHASE_CANCEL; triggerHandler(event, phase); } $element.unbind(MOVE_EV, touchMove, false); $element.unbind(END_EV, touchEnd, false); setTouchInProgress(false); } /** * Event handler for a touch cancel event. * Clears current vars */ function touchCancel() { // reset the variables back to default values fingerCount = 0; endTime = 0; startTime = 0; previousEndTime=0; previousFingerCount=0; startTouchesDistance=0; endTouchesDistance=0; pinchZoom=1; setTouchInProgress(false); } /** * Trigger the relevant event handler * The handlers are passed the original event, the element that was swiped, and in the case of the catch all handler, the direction that was swiped, "left", "right", "up", or "down" * @param event the original event object * @param phase the phase of the swipe (start, end cancel etc) */ function triggerHandler(event, phase) { var ret = undefined; // SWIPE GESTURES if(hasSwipes()) { //Trigger the swipe events... ret = triggerHandlerForGesture(event, phase, SWIPE); } // PINCH GESTURES (if the above didnt cancel) if(hasPinches() && ret!==false) { //Trigger the pinch events... ret = triggerHandlerForGesture(event, phase, PINCH); } // CLICKS / TAPS (if the above didnt cancel) if(hasClick() && ret!==false) { //Trigger the pinch events... ret = triggerHandlerForGesture(event, phase, CLICK); } // Manually trigger the cancel handler to clean up data if (phase === PHASE_CANCEL || phase === PHASE_END) { touchCancel(event); } return ret; } /** * Trigger the relevant event handler * The handlers are passed the original event, the element that was swiped, and in the case of the catch all handler, the direction that was swiped, "left", "right", "up", or "down" * @param event the original event object * @param phase the phase of the swipe (start, end cancel etc) * @param gesture the gesture to triger a handler for : PINCH or SWIPE */ function triggerHandlerForGesture(event, phase, gesture) { var ret=undefined; //SWIPES.... if(gesture==SWIPE) { //Trigger status every time.. if (options.swipeStatus) { ret = options.swipeStatus.call($element, event, phase, direction || null, distance || 0, duration || 0, fingerCount); //If the status cancels, then dont run the subsequent event handlers.. if(ret===false) return false; } if (phase == PHASE_END && validateSwipe()) { //trigger catch all event handler if (options.swipe) { ret = options.swipe.call($element, event, direction, distance, duration, fingerCount); //If the status cancels, then dont run the subsequent event handlers.. if(ret===false) return false; } //trigger direction specific event handlers switch (direction) { case LEFT: if (options.swipeLeft) { ret = options.swipeLeft.call($element, event, direction, distance, duration, fingerCount); } break; case RIGHT: if (options.swipeRight) { ret = options.swipeRight.call($element, event, direction, distance, duration, fingerCount); } break; case UP: if (options.swipeUp) { ret = options.swipeUp.call($element, event, direction, distance, duration, fingerCount); } break; case DOWN: if (options.swipeDown) { ret = options.swipeDown.call($element, event, direction, distance, duration, fingerCount); } break; } } } //PINCHES.... if(gesture==PINCH) { //Trigger status every time if (options.pinchStatus) { ret = options.pinchStatus.call($element, event, phase, pinchDirection || null, pinchDistance || 0, duration || 0, fingerCount, pinchZoom); //If the status cancels, then dont run the subsequent event handlers.. if(ret===false) return false; } if(phase==PHASE_END && validatePinch()) { switch (pinchDirection) { case IN: if (options.pinchIn) { ret = options.pinchIn.call($element, event, pinchDirection || null, pinchDistance || 0, duration || 0, fingerCount, pinchZoom); } break; case OUT: if (options.pinchOut) { ret = options.pinchOut.call($element, event, pinchDirection || null, pinchDistance || 0, duration || 0, fingerCount, pinchZoom); } break; } } } //CLICKS... if(gesture==CLICK) { if(phase === PHASE_CANCEL) { if (options.click && (fingerCount === 1 || !SUPPORTS_TOUCH) && (isNaN(distance) || distance === 0)) { ret = options.click.call($element, event, event.target); } } } return ret; } /** * Checks the user has swipe far enough */ function validateSwipeDistance() { if (options.threshold !== null) { return distance >= options.threshold; } return null; } /** * Checks the user has pinched far enough */ function validatePinchDistance() { if (options.pinchThreshold !== null) { return pinchDistance >= options.pinchThreshold; } return null; } /** * Checks that the time taken to swipe meets the minimum / maximum requirements */ function validateSwipeTime() { var result; //If no time set, then return true if (options.maxTimeThreshold) { if (duration >= options.maxTimeThreshold) { result = false; } else { result = true; } } else { result = true; } return result; } /** * Checks direction of the swipe and the value allowPageScroll to see if we should allow or prevent the default behaviour from occurring. * This will essentially allow page scrolling or not when the user is swiping on a touchSwipe object. */ function validateDefaultEvent(jqEvent, direction) { if (options.allowPageScroll === NONE || hasPinches()) { jqEvent.preventDefault(); } else { var auto = options.allowPageScroll === AUTO; switch (direction) { case LEFT: if ((options.swipeLeft && auto) || (!auto && options.allowPageScroll != HORIZONTAL)) { jqEvent.preventDefault(); } break; case RIGHT: if ((options.swipeRight && auto) || (!auto && options.allowPageScroll != HORIZONTAL)) { jqEvent.preventDefault(); } break; case UP: if ((options.swipeUp && auto) || (!auto && options.allowPageScroll != VERTICAL)) { jqEvent.preventDefault(); } break; case DOWN: if ((options.swipeDown && auto) || (!auto && options.allowPageScroll != VERTICAL)) { jqEvent.preventDefault(); } break; } } } /** * Calcualte the duration of the swipe */ function calculateDuration() { return endTime - startTime; } /** * Calculate the distance between 2 touches (pinch) */ function calculateTouchesDistance(startPoint, endPoint) { var diffX = Math.abs(startPoint.x - endPoint.x); var diffY = Math.abs(startPoint.y - endPoint.y); return Math.round(Math.sqrt(diffX*diffX+diffY*diffY)); } /** * Calculate the zoom factor between the start and end distances */ function calculatePinchZoom(startDistance, endDistance) { var percent = (endDistance/startDistance) * 1; return percent.toFixed(2); } /** * Returns the pinch direction, either IN or OUT for the given points */ function calculatePinchDirection() { if(pinchZoom<1) { return OUT; } else { return IN; } } /** * Calculate the length / distance of the swipe * @param finger A finger object containing start and end points */ function calculateDistance(startPoint, endPoint) { return Math.round(Math.sqrt(Math.pow(endPoint.x - startPoint.x, 2) + Math.pow(endPoint.y - startPoint.y, 2))); } /** * Calcualte the angle of the swipe * @param finger A finger object containing start and end points */ function caluculateAngle(startPoint, endPoint) { var x = startPoint.x - endPoint.x; var y = endPoint.y - startPoint.y; var r = Math.atan2(y, x); //radians var angle = Math.round(r * 180 / Math.PI); //degrees //ensure value is positive if (angle < 0) { angle = 360 - Math.abs(angle); } return angle; } /** * Calcualte the direction of the swipe * This will also call caluculateAngle to get the latest angle of swipe * @param finger A finger object containing start and end points */ function calculateDirection(startPoint, endPoint ) { var angle = caluculateAngle(startPoint, endPoint); if ((angle <= 45) && (angle >= 0)) { return LEFT; } else if ((angle <= 360) && (angle >= 315)) { return LEFT; } else if ((angle >= 135) && (angle <= 225)) { return RIGHT; } else if ((angle > 45) && (angle < 135)) { return DOWN; } else { return UP; } } /** * Returns a MS time stamp of the current time */ function getTimeStamp() { var now = new Date(); return now.getTime(); } /** * Removes all listeners that were associated with the plugin */ function removeListeners() { $element.unbind(START_EV, touchStart); $element.unbind(CANCEL_EV, touchCancel); $element.unbind(MOVE_EV, touchMove); $element.unbind(END_EV, touchEnd); setTouchInProgress(false); } /** * Returns true of any clcik / tap evetns have been registered */ function hasClick() { //Enure we dont return 0 or null for false values return !!(options.click); } /** * Returns true of the current pinch meets the thresholds */ function validatePinch() { //Check the pinch thresholds var hasValidPinchDistance = validatePinchDistance(); //Check the pinch met the minimum requirements var valid = (hasValidPinchDistance === true || hasValidPinchDistance === null); return valid; } /** * Returns true if any Pinch events have been registered */ function hasPinches() { //Enure we dont return 0 or null for false values return !!(options.pinchStatus || options.pinchIn || options.pinchOut); } /** * Returns true if we are detecting pinches, and have one */ function didPinch() { //Enure we dont return 0 or null for false values return !!(pinchDirection && hasPinches()); } /** * Returns true if the current swipe meets the thresholds */ function validateSwipe() { //Check validity of swipe var hasValidTime = validateSwipeTime(); var hasValidDistance = validateSwipeDistance(); // if the user swiped more than the minimum length, perform the appropriate action // hasValidDistance is null when no distance is set var valid = (hasValidDistance === true || hasValidDistance === null) && hasValidTime; return valid; } /** * Returns true if any Swipe events have been registered */ function hasSwipes() { //Enure we dont return 0 or null for false values return !!(options.swipe || options.swipeStatus || options.swipeLeft || options.swipeRight || options.swipeUp || options.swipeDown); } /** * Returns true if we are detecting swipes and have one */ function didSwipe() { //Enure we dont return 0 or null for false values return !!(direction && hasSwipes()); } /** * gets a data flag to indicate that a touch is in progress */ function getTouchInProgress() { return $element.data(PLUGIN_NS+'_intouch') === true ? true : false; } /** * Sets a data flag to indicate that a touch is in progress */ function setTouchInProgress(val) { val = val===true?true:false; $element.data(PLUGIN_NS+'_intouch', val); } function createFingerData( index, evt ) { var id = evt.identifier!==undefined ? evt.identifier : 0; fingerData[index].identifier = id; fingerData[index].start.x = fingerData[index].end.x = evt.pageX; fingerData[index].start.y = fingerData[index].end.y = evt.pageY; return fingerData[index]; } function updateFingerData(evt) { var id = evt.identifier!==undefined ? evt.identifier : 0; var f = getFingerData( id ); f.end.x = evt.pageX; f.end.y = evt.pageY; return f; } function getFingerData( id ) { for(var i=0; i