Scroller = function(element) {
this.element = this;
this.startTouchY = 0;
this.animateTo(0);
element.addEventListener(‘touchstart’, this, false);
element.addEventListener(‘touchmove’, this, false);
element.addEventListener(‘touchend’, this, false);
}
Scroller.prototype.handleEvent = function(e) {
switch (e.type) {
case “touchstart”:
this.onTouchStart(e);
break;
case “touchmove”:
this.onTouchMove(e);
break;
case “touchend”:
this.onTouchEnd(e);
break;
}
}
Scroller.prototype.onTouchStart = function(e) {
// This will be shown in part 4.
this.stopMomentum();
this.startTouchY = e.touches[0].clientY;
this.contentStartOffsetY = this.contentOffsetY;
}
Scroller.prototype.onTouchMove = function(e) {
if (this.isDragging()) {
var currentY = e.touches[0].clientY;
var deltaY = currentY - this.startTouchY;
var newY = deltaY + this.contentStartOffsetY;
this.animateTo(newY);
}
}
Scroller.prototype.onTouchEnd = function(e) {
if (this.isDragging()) {
if (this.shouldStartMomentum()) {
// This will be shown in part 3.
this.doMomentum();
} else {
this.snapToBounds();
}
}
}
Scroller.prototype.animateTo = function(offsetY) {
this.contentOffsetY = offsetY;
// We use webkit-transforms with translate3d because these animations
// will be hardware accelerated, and therefore significantly faster
// than changing the top value.
this.element.style.webkitTransform = ‘translate3d(0, ‘ + offsetY + ‘px, 0)’;
}
// Implementation of this method is left as an exercise for the reader.
// You need to measure the current position of the scrollable content
// relative to the frame. If the content is outside of the boundaries
// then simply reposition it to be just within the appropriate boundary.
Scroller.prototype.snapToBounds = function() {
...
}
// Implementation of this method is left as an exercise for the reader.
// You need to consider whether their touch has moved past a certain
// threshold that should be considered ‘dragging’.
Scroller.prototype.isDragging = function() {
...
}
// Implementation of this method is left as an exercise for the reader.
// You need to consider the end velocity of the drag was past the
// threshold required to initiate momentum.
Scroller.prototype.shouldStartMomentum = function() {
...
}
css mobile
https://developers.google.com/mobile/articles/webapp_fixed_ui#bg
<iframe width="100%" height="1676" src="http://snipet.teknotit.com/index.php?embed=5473ec67052e3" type="text/html"></iframe>
Texte seul - Permalink - Snippet public posté le 25/11/2014
var page = document.getElementById('page'),
ua = navigator.userAgent,
iphone = ~ua.indexOf('iPhone') || ~ua.indexOf('iPod'),
ipad = ~ua.indexOf('iPad'),
ios = iphone || ipad,
// Detect if this is running as a fullscreen app from the homescreen
fullscreen = window.navigator.standalone,
android = ~ua.indexOf('Android'),
lastWidth = 0;
if (android) {
// Android's browser adds the scroll position to the innerHeight, just to
// make this really fucking difficult. Thus, once we are scrolled, the
// page height value needs to be corrected in case the page is loaded
// when already scrolled down. The pageYOffset is of no use, since it always
// returns 0 while the address bar is displayed.
window.onscroll = function() {
page.style.height = window.innerHeight + 'px'
}
}
var setupScroll = function() {
// Start out by adding the height of the location bar to the width, so that
// we can scroll past it
if (ios) {
// iOS reliably returns the innerWindow size for documentElement.clientHeight
// but window.innerHeight is sometimes the wrong value after rotating
// the orientation
var height = document.documentElement.clientHeight;
// Only add extra padding to the height on iphone / ipod, since the ipad
// browser doesn't scroll off the location bar.
if (iphone && !fullscreen) height += 60;
page.style.height = height + 'px';
} else if (android) {
// The stock Android browser has a location bar height of 56 pixels, but
// this very likely could be broken in other Android browsers.
page.style.height = (window.innerHeight + 56) + 'px'
}
// Scroll after a timeout, since iOS will scroll to the top of the page
// after it fires the onload event
setTimeout(scrollTo, 0, 0, 1);
};
(window.onresize = function() {
var pageWidth = page.offsetWidth;
// Android doesn't support orientation change, so check for when the width
// changes to figure out when the orientation changes
if (lastWidth == pageWidth) return;
lastWidth = pageWidth;
setupScroll();
})();
mobile
https://gist.github.com/nateps/1172490
<iframe width="100%" height="1064" src="http://snipet.teknotit.com/index.php?embed=5462e3173dbb8" type="text/html"></iframe>
Texte seul - Permalink - Snippet public posté le 12/11/2014