Created
November 7, 2011 01:48
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Touch events for jQuery Cycle
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Drupal.settings.isTouchDevice = function() { | |
return "ontouchstart" in window; | |
} | |
if ( Drupal.settings.isTouchDevice() ) { | |
Drupal.behaviors.jQueryMobileSlideShowTouchAdvance = { | |
attach: function(context, settings) { | |
self = Drupal.behaviors.jQueryMobileSlideShowTouchAdvance; | |
jQuery.each(jQuery(".views_slideshow_cycle_main.viewsSlideshowCycle-processed"), function(idx, value) { | |
value.addEventListener("touchstart", self.handleTouchStart); | |
jQuery(value).addClass("views-slideshow-mobile-processed"); | |
}) | |
jQuery(self).bind("swipe", self.handleSwipe); | |
}, | |
detach: function() { }, original: { x: 0, y: 0}, | |
changed: { x: 0, y: 0}, direction: { x: "", y: "" }, fired: false, | |
handleTouchStart: function(evt) { | |
self = Drupal.behaviors.jQueryMobileSlideShowTouchAdvance; | |
if (evt.touches) { | |
if (evt.targetTouches.length != 1) { return false; } // don't respond to gestures | |
if (evt.touches.length) { evt.preventDefault(); evt.stopPropagation() } | |
self.original = { x: evt.touches[0].clientX, y: evt.touches[0].clientY } | |
self.target = jQuery(this).attr("id").replace("views_slideshow_cycle_main_", ""); | |
Drupal.viewsSlideshow.action({ "action": "pause", "slideshowID": self.target }); | |
evt.target.addEventListener("touchmove", self.handleTouchMove); | |
evt.target.addEventListener("touchend", self.handleTouchEnd); | |
} | |
}, | |
handleTouchMove: function(evt) { | |
self = Drupal.behaviors.jQueryMobileSlideShowTouchAdvance; | |
self.changed = { | |
x: (evt.touches.length) ? evt.touches[0].clientX: evt.changedTouches[0].clientX, | |
y: (evt.touches.length) ? evt.touches[0].clientY: evt.changedTouches[0].clientY | |
}; | |
h = parseInt(self.original.x - self.changed.x), v = parseInt(self.original.y - self.changed.y); | |
if (h !== 0) { self.direction.x = (h < 0) ? "right":"left"; } | |
if (v !== 0) { self.direction.y = (v < 0) ? "up": "down"; } | |
if ((h+v) != 0) { | |
jQuery(self).trigger("swipe"); | |
} | |
}, | |
handleTouchEnd: function(evt) { | |
self = Drupal.behaviors.jQueryMobileSlideShowTouchAdvance; | |
evt.target.removeEventListener("touchmove", self.handleTouchMove); | |
evt.target.removeEventListener("touchend", self.handleTouchEnd); | |
self.fired = false; | |
}, | |
handleSwipe: function(evt) { | |
self = Drupal.behaviors.jQueryMobileSlideShowTouchAdvance; | |
if (evt != undefined && self.fired == false) { | |
Drupal.viewsSlideshow.action({ "action": (self.direction.x == "left")?"nextSlide":"previousSlide", "slideshowID": self.target }); | |
self.fired = true; //only fire advance once per touch | |
} | |
} | |
} | |
} |
There's a bug in these lines:
self = Drupal.behaviors.jQueryMobileSlideShowTouchAdvance
At that point self is already defined as window.self which is then over written. This was causing some random javscript failures on our site. To fix, each line defining self need var added. So:
var self = Drupal.behaviors.jQueryMobileSlideShowTouchAdvance
Thanks for the code!
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Very usefuill , Thanks !