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touchable.js
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touchable.js
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/*
* jQuery Touchable
*
* Simplified BSD License (@see License)
* @author Gregor Schwab
* @copyright (c) 2010 Gregor Schwab
* Usage Command Line: $(elem).Touchable() (@see Readme.md)
* @version 0.0.5
* @requires jQuery
*/
(function($) {
$.fn.Touchable = function(conf) {
return this.each(function() {
var t= $(this).data['Touchable']=new Touchable(this, conf);
return t;
});
};
$.fn.newHover = function(fn1, fn2, disableHover) {
return this.each(function() {
$(this).bind('newHoverIn', fn1).bind('newHoverOut', fn2);
});
};
$.fn.newHover2 = function(fn1, fn2) {
return this.each(function() {
$(this).bind('newHoverIn2', fn1).bind('newHoverOut2', fn2);
});
};
$.Touchable=Touchable;
/**
* @constructor
*/
function Touchable(elem, conf){
function addEventListener(el, eventName, eventHandler, capture){
capture = capture === true ? capture : false;
if (el.addEventListener){
el.addEventListener(eventName, eventHandler, capture);
} else if (el.attachEvent){
el.attachEvent('on'+eventName, eventHandler);
}
}
function removeEventListener(el, eventName, eventHandler, capture){
capture = capture === true ? capture : false;
if (el.removeEventListener){
el.removeEventListener(eventName,eventHandler, capture);
}else if (el.detachEvent){
el.detachEvent ('on'+eventName,eventHandler);
}
}
//private logging function
function log(a){
if(self.logging){
if(typeof console !== 'undefined'){
console.log(a);
}else{
$('body').append('<br /> * ' + a);
}
}
}
function touchstart (e) {
if(e.originalEvent && typeof e.originalEvent.touches !== 'undefined'){
log('Touchable Touchstart touches length ' + e.originalEvent.touches.length);
//only handle 1 or 2 touches
if (e.originalEvent.touches.length !== 1 && e.originalEvent.touches.length !== 2) {
return false;
}
if (self.isCurrentlyTouching) {
return false;
}
self.isCurrentlyTouching = true;
if (e.originalEvent.touches.length == 1) { //1 finger
self.isOneFingerGesture = true;
//init pos
self.startTouch.x = self.previousTouch.x = e.originalEvent.touches[0].clientX;
self.startTouch.y = self.previousTouch.y = e.originalEvent.touches[0].clientY;
} else if (e.originalEvent.touches.length == 2) { //two fingers
self.isOneFingerGesture = false;
if (e.originalEvent.touches[0].clientY > e.originalEvent.touches[1].clientY) {//0 is lower
self.startTouch.x = self.previousTouch.x = e.originalEvent.touches[0].clientX;
self.startTouch.y = self.previousTouch.y = e.originalEvent.touches[0].clientY;
} else {
self.startTouch.x = self.previousTouch.x = self.touches[1].clientX;
self.startTouch.y = self.previousTouch.y = self.touches[1].clientY;
}
}
}else{
log('Touchable Touchstart touches length ' + e.pageX + ' ' + e.pageY);
self.startTouch.x = self.previousTouch.x = e.pageX;
self.startTouch.y = self.previousTouch.y = e.pageY;
$(document).bind('mousemove', touchmove);
$(document).bind('mouseup', touchend);
}
//don't shallow links, but all the rest
self.target=e.target;//some browser loose the info here
self.currentTarget=e.currentTarget;//some browser loose the info here so save it for later
var x=self.startTouch.x; var y=self.startTouch.y;
self.hitTarget = ( document.elementFromPoint ) ? (document.elementFromPoint(x, y)):'';
//setup double tapping
if (!self.inDoubleTap) {
self.inDoubleTap = true;
//setup a timer
self.doubleTapTimer = setTimeout(function() {
self.inDoubleTap = false;
}, 500);
} else {//we are double tapping
// call function to run if double-tap
log('Touchable doubleTap');
self.$elem.trigger('doubleTap', self); //trigger a doubleTap
//reset doubleTap state
clearTimeout(self.doubleTapTimer);
self.inDoubleTap = false;
}
//setup long tapping and long mousedown
//setup a timer
self.longTapTimer = setTimeout(function() {
log('Touchable longTap'/*, self.hitTarget, self.target, self.currentTarget, self.elem*/);
$(self.elem).trigger('longTap', self); //trigger a longTap
}, 1000);
log('Touchable Tap');
$(self.elem).trigger('tap', self); //trigger a tap
$(self.elem).trigger('touchablestart', self); //trigger a tap
}
//called on iPad/iPhone when touches started and the finger is moved
function touchmove(e) {
if (e.originalEvent && typeof e.originalEvent.touches !== 'undefined'){
log('Touchable Touchsmove touches length ' + e.originalEvent.touches.length);
if (e.originalEvent.touches.length !== 1 && e.originalEvent.touches.length !== 2){ //use touches to track all fingers on the screen currently (also the ones not in the pane) if there are more than 2 its a gesture
return false;
}
//1 finger
if (e.originalEvent.touches.length == 1 || self.isOneFingerGesture) {//we ignore the second finger if we are already in movement
self.currentTouch.x = e.originalEvent.touches[0].clientX;
self.currentTouch.y = e.originalEvent.touches[0].clientY;
} else if (e.originalEvent.touches.length == 2 && !self.isOneFingerGesture) {//two fingers move , take the upper finger as reference
if (e.originalEvent.touches[0].clientY > e.originalEvent.touches[1].clientY) {//0 is lower
self.currentTouch.x = e.originalEvent.touches[0].clientX;
self.currentTouch.y = e.originalEvent.touches[0].clientY;
} else {
self.currentTouch.x = e.originalEvent.touches[1].clientX;
self.currentTouch.y = e.originalEvent.touches[1].clientY;
}
}
}else{
e.preventDefault();
self.currentTouch.x = e.pageX;
self.currentTouch.y = e.pageY;
}
//if we are moving stop any css animations currently running
$(self.elem).removeClass('webkitAnimate');
self.currentDelta.x = (self.currentTouch.x - self.previousTouch.x);///s.currentScale;
self.currentDelta.y = (self.currentTouch.y - self.previousTouch.y);///s.currentScale;
self.currentStartDelta.x = (self.currentTouch.x - self.startTouch.x);///s.currentScale;
self.currentStartDelta.y = (self.currentTouch.y - self.startTouch.y);///s.currentScale;
//just for the records (accumulation)
self.currentPosition.x = self.currentPosition.x + self.currentDelta.x;
self.currentPosition.y = self.currentPosition.y + self.currentDelta.y;
//reset the start position for the next delta
self.previousTouch.x = self.currentTouch.x;
self.previousTouch.y = self.currentTouch.y;
log('Touchable Touchablemove self e.target' + e.target + 'e.currentTarget '+ e.currentTarget +' x:'+ self.currentStartDelta.x);
//Target handling
self.target=e.target;//some browser loose the info here
self.currentTarget=e.currentTarget;//some browser loose the info here so save it for later
var x=self.currentTouch.x; var y=self.currentTouch.y;
self.hitTarget = ( document.elementFromPoint ) ? (document.elementFromPoint(x, y)):'';
$(self.elem).trigger('touchablemove', self);
//clear the long tap timer on mousemove
if (self.longTapTimer){
clearTimeout(self.longTapTimer);
}
}
function touchend(e) {
if (e.originalEvent && typeof e.originalEvent.touches !== 'undefined'){
if (e.originalEvent.targetTouches.length > 0){
return false;
}
}else{
$(document).unbind('mousemove', touchmove);
$(document).unbind('mouseup', touchend);
}
self.isCurrentlyTouching = false;
//clear the long tap timer on mouseup
if (self.longTapTimer){
clearTimeout(self.longTapTimer);
}
log('Touchable Touchend self ' + self.currentStartDelta.x);
$(self.elem).trigger('touchableend', self);
log('Touchable: touchableend');
log('Touchable: Hittarget click');
}
this.logging=false; //set to false to disabele logging gets overwritten by conf see below
this.elem=elem;
this.$elem=$(elem);
this.is_doubleTap=false;
this.is_currentlyTouching=false;
this.isOneFingerGesture = false;
this.startTouch={x:0,y:0};
this.currentTouch={x:0,y:0};
this.previousTouch={x:0,y:0};
this.currentDelta={x:0,y:0};//measured from previous move event
this.currentStartDelta={x:0,y:0}; //measured from start
this.currentPosition={x:0,y:0};
this.doubleTapTimer=null;
this.longTapTimer=null;
this.touchStartSupported=false;
var self=this;
if (typeof conf!=='undefined'){
if(typeof conf.logging!=='undefined'){
this.logging=conf.logging;
}
if(typeof conf.preventClick!=='undefined'){
this.preventClick=conf.preventClick;
}
}
this.$elem.bind('touchstart', function(e){
self.touchStartSupported = true;
touchstart(e);
});
this.$elem.bind('mousedown', function(e){
if(!self.touchStartSupported){
touchstart(e);
}
return false;
});
this.$elem.bind('touchmove', touchmove);
this.$elem.bind('touchend', touchend);
if (this.preventClick) {
this.$elem.bind('click', function (e) {
e.preventDefault();
});
}
}
})(jQuery);//end closure