/**
* jQuery Plugin to obtain touch gestures from iPhone, iPod Touch and iPad, should also work with Android mobile phones (not tested yet!)
* Common usage: wipe images (left and right to show the previous or next image)
*
* @author Andreas Waltl, netCU Internetagentur (http://www.netcu.de)
* @version 1.1.1 (9th December 2010) - fix bug (older IE's had problems)
* @version 1.1 (1st September 2010) - support wipe up and wipe down
* @version 1.0 (15th July 2010)
*/
(function($) {
$.fn.touchwipe = function(settings) {
var config = {
min_move_x: 20,
min_move_y: 20,
wipeLeft: function() { },
wipeRight: function() { },
wipeUp: function() { },
wipeDown: function() { },
preventDefaultEvents: true
};
if (settings) $.extend(config, settings);
this.each(function() {
var startX;
var startY;
var isMoving = false;
function cancelTouch() {
this.removeEventListener('touchmove', onTouchMove);
startX = null;
isMoving = false;
}
function onTouchMove(e) {
if(config.preventDefaultEvents) {
e.preventDefault();
}
if(isMoving) {
var x = e.touches[0].pageX;
var y = e.touches[0].pageY;
var dx = startX - x;
var dy = startY - y;
if(Math.abs(dx) >= config.min_move_x) {
cancelTouch();
if(dx > 0) {
config.wipeLeft();
}
else {
config.wipeRight();
}
}
else if(Math.abs(dy) >= config.min_move_y) {
cancelTouch();
if(dy > 0) {
config.wipeDown();
}
else {
config.wipeUp();
}
}
}
}
function onTouchStart(e)
{
if (e.touches.length == 1) {
startX = e.touches[0].pageX;
startY = e.touches[0].pageY;
isMoving = true;
this.addEventListener('touchmove', onTouchMove, false);
}
}
if ('ontouchstart' in document.documentElement) {
this.addEventListener('touchstart', onTouchStart, false);
}
});
return this;
};
})(jQuery);
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