/*
 * touchSwipe - jQuery Plugin
 * http://plugins.jquery.com/project/touchSwipe
 * http://labs.skinkers.com/touchSwipe/
 *
 * Copyright (c) 2010 Matt Bryson (www.skinkers.com)
 * Licensed under the GNU GPL license
 *
 * $version: 1.2.2
 * This jQuery plugin will only run on devices running Mobile Webkit based browsers (iOS 2.0+, android 2.2+)
 */
(function($){$.fn.swipe=function(options){if(!this)return false;var defaults={fingers:1,threshold:75,swipe:null,swipeLeft:null,swipeRight:null,swipeUp:null,swipeDown:null,swipeStatus:null,click:null,triggerOnTouchEnd:true,allowPageScroll:"auto"};var LEFT="left";var RIGHT="right";var UP="up";var DOWN="down";var NONE="none";var HORIZONTAL="horizontal";var VERTICAL="vertical";var AUTO="auto";var PHASE_START="start";var PHASE_MOVE="move";var PHASE_END="end";var PHASE_CANCEL="cancel";var phase="start";if(options.allowPageScroll==undefined&&(options.swipe!=undefined||options.swipeStatus!=undefined))options.allowPageScroll=NONE;if(options)$.extend(defaults,options);return this.each(function(){var $this=$(this);var triggerElementID=null;var fingerCount=0;var start={x:0,y:0};var end={x:0,y:0};var delta={x:0,y:0};function touchStart(event){phase=PHASE_START;fingerCount=event.touches.length;distance=0;direction=null;if(fingerCount==defaults.fingers){start.x=end.x=event.touches[0].pageX;start.y=end.y=event.touches[0].pageY;if(defaults.swipeStatus)triggerHandler(event,phase)}else{touchCancel(event)}}function touchMove(event){if(phase==PHASE_END||phase==PHASE_CANCEL)return;end.x=event.touches[0].pageX;end.y=event.touches[0].pageY;direction=caluculateDirection();fingerCount=event.touches.length;phase=PHASE_MOVE;validateDefaultEvent(event,direction);if(fingerCount==defaults.fingers){distance=caluculateDistance();if(defaults.swipeStatus)triggerHandler(event,phase,direction,distance);if(!defaults.triggerOnTouchEnd){if(distance>=defaults.threshold){phase=PHASE_END;triggerHandler(event,phase);touchCancel(event)}}}else{phase=PHASE_CANCEL;triggerHandler(event,phase);touchCancel(event)}}function touchEnd(event){event.preventDefault();distance=caluculateDistance();direction=caluculateDirection();if(defaults.triggerOnTouchEnd){phase=PHASE_END;if(fingerCount==defaults.fingers&&end.x!=0){if(distance>=defaults.threshold){triggerHandler(event,phase);touchCancel(event)}else{phase=PHASE_CANCEL;triggerHandler(event,phase);touchCancel(event)}}else{phase=PHASE_CANCEL;triggerHandler(event,phase);touchCancel(event)}}else if(phase==PHASE_MOVE){phase=PHASE_CANCEL;triggerHandler(event,phase);touchCancel(event)}}function touchCancel(event){fingerCount=0;start.x=0;start.y=0;end.x=0;end.y=0;delta.x=0;delta.y=0}function triggerHandler(event,phase){if(defaults.swipeStatus)defaults.swipeStatus.call($this,event,phase,direction||null,distance||0);if(phase==PHASE_CANCEL){if(defaults.click&&fingerCount==1&&(isNaN(distance)||distance==0))defaults.click.call($this,event,event.target)}if(phase==PHASE_END){if(defaults.swipe){defaults.swipe.call($this,event,direction,distance)}switch(direction){case LEFT:if(defaults.swipeLeft)defaults.swipeLeft.call($this,event,direction,distance);break;case RIGHT:if(defaults.swipeRight)defaults.swipeRight.call($this,event,direction,distance);break;case UP:if(defaults.swipeUp)defaults.swipeUp.call($this,event,direction,distance);break;case DOWN:if(defaults.swipeDown)defaults.swipeDown.call($this,event,direction,distance);break}}}function validateDefaultEvent(event,direction){if(defaults.allowPageScroll==NONE){event.preventDefault()}else{var auto=defaults.allowPageScroll==AUTO;switch(direction){case LEFT:if((defaults.swipeLeft&&auto)||(!auto&&defaults.allowPageScroll!=HORIZONTAL))event.preventDefault();break;case RIGHT:if((defaults.swipeRight&&auto)||(!auto&&defaults.allowPageScroll!=HORIZONTAL))event.preventDefault();break;case UP:if((defaults.swipeUp&&auto)||(!auto&&defaults.allowPageScroll!=VERTICAL))event.preventDefault();break;case DOWN:if((defaults.swipeDown&&auto)||(!auto&&defaults.allowPageScroll!=VERTICAL))event.preventDefault();break}}}function caluculateDistance(){return Math.round(Math.sqrt(Math.pow(end.x-start.x,2)+Math.pow(end.y-start.y,2)))}function caluculateAngle(){var X=start.x-end.x;var Y=end.y-start.y;var r=Math.atan2(Y,X);var angle=Math.round(r*180/Math.PI);if(angle<0)angle=360-Math.abs(angle);return angle}function caluculateDirection(){var angle=caluculateAngle();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}this.addEventListener("touchstart",touchStart,false);this.addEventListener("touchmove",touchMove,false);this.addEventListener("touchend",touchEnd,false);this.addEventListener("touchcancel",touchCancel,false)})}})(jQuery);