Develop Reference

How to identify REAL mouse movement when entering fullscreen mode

I have the problem, that I need to know if the user actually moved his mouse for real when entering fullscreen, or if it just is a programatically side effect of entering the fullscreen.
Because, when entering fullscreen, the mouse Y coordinates change automatically because the mouse moves upwards on the absolute screen position (since the top navigation of the browser disappears). And since every browser brings a notification in fullscreen mode, this very notification triggers a mousemove event.
So, this makes it very painful to find out, whether the user acually move the mouse, or not.
Is there a solution to identify REAL mouse movement?
$(document).on('mousemove', function(event){
/* gets also triggered when just entering fullscreen,
but without actual movement of the physical mouse..
how can this be identified/ignored?
*/
});
JS Fiddle
What I've tried so far
I tried already relativating the mouse position by using something like window.screen.top - but this seems not to be implemented yet by any browser so far.

I don't think there's anything formally implemented as yet to detect full screen. There's a fullscreenchange as part of the Fullscreen API but it's still experimental and requires vendor-specific prefixes.
So, basically you'll have to get around that limitation with some tricks, like intersecting the resize event and skipping whatever logic you are running on mousemove. Here's an example...
var resizing = false;
$(document).on('mousemove', function(event){
if(resizing == false){
$('p').text(event.pageX + ':' + event.pageY);
console.log("moving");
}
});
$(window).resize(function(){
resizing = true;
setTimeout(function(){
resizing = false;
}, 4000);
});
This example simply defines a flag that determines whether the window is resizing or not, if resizing the onmousemove logic is skipped. Particularly I hate to use setTimeout with an arbitrary time to switch off the resizing flag, but if your requirements are not so strict it can get the job done beautifully

Why don't you incorporate a delay (for example 0.5 seconds) where you ignore all mouse inputs. After the delay, any mouse movements are likely to be from the user...

I solved it now by saving the mouse coordinates, and check if they change - while I force one mousemove event after fullscreen in order to update the coordinates once.
$(document).on('mousemove', function(event){
if(event.pageX == $(this).data('mouseX') && event.pageY == $(this).data('mouseY'))
return;
$(this)
.data('mouseX', event.pageX)
.data('mouseY', event.pageY)
;
});
$(document).mousemove();

Make div height the distance of swipe down

I'm trying to gradually show a div as the swipe down event happens on the body.
I'm currently using the jQuery version of hammer.js to listen for the swipe down, but how do I get the distance of the swipe and change the height of the div as the swipe is happening to that value?
It is not much, but here is what I have so far:
var distance;
$('body').on('swipedown', function(){
// set distance to swipe distance
$('header, #header, [role="banner"]').css('height', distance);
});
But, won't the above only set the distance at the end of the swipe down? How can I set the distance while the swipe down is happening?
I would greatly appreciate any and all help!

By hammer.js swipedown event triggered, your function will get a gesture object in the event object.
you can get that like this
Hammer(document.body).on('swipedown', function(e){
gesture = e.gesture
// gesture.distance or gesture.deltaY is swipe distance
// and you can console.log(gesture) to find more!
});

With javascript / query, is there a way to just "nudge" or "flick" the scroll so it's interruptible by the user (better description within)

I want some js to automatically scroll just a slight bit down the page, however I also want this scroll to be interruptible by the user.
When using jquery to auto scroll, when you animate the scroll with .animate and then the user starts scrolling while the animation scroll is still going they interact with each other and create a strange jumping effect.
Is there a way to make so when the user scroll during a javascript scroll it just stop the javascript scroll?

It can't be done since you can't know if the end-user scrolled or you scrolled the page via javascript.
A scroll event is sent whenever the element's scroll position changes, regardless of the cause. A mouse click or drag on the scroll bar, dragging inside the element, pressing the arrow keys, or using the mouse's scroll wheel could cause this event.
Docs
What I tried to do but failed because the above:
// callback for the scroll event
$(document.body).scroll(function(){
// Stop the scrolling!
$('html, body').stop();
});
A not working demo...

The other users answer is actually incorrect, it is possible and has been answered before:
How can I differentiate a manual scroll (via mousewheel/scrollbar) from a Javascript/jQuery scroll?
Check the answer
"$('body,html').bind('scroll mousedown wheel DOMMouseScroll mousewheel keyup', function(e){
if ( e.which > 0 || e.type == "mousedown" || e.type == "mousewheel"){
$("html,body").stop();
}
})"
I've updated the previous users JS Fiddle to work with the proposed solution and it works perfectly.
http://jsfiddle.net/Lwvba/7/

What logic am I missing?

I have a #wrapper div wrap a #pane div, the #wrapper, overflow-x:scroll.
What I want to do is while I touch the #wrapper,the #pane should follow my finger moving.
my code is
$('#wrapper').on('touchmove',function(event){
var touch = event.originalEvent.targetTouches[0];
var move_x = touch.pageX;
$('#wrapper').scrollLeft(move_x);
})
The result is : Yes the #pane is following my finger just in reverse direction, but when my finger leave and touch again, the #pane scroll location jump to my finger x position instantly, that's not what I want. The #pane shouldn't move when I touch it until I drag around it.

If you dont want it to jump to your finger location, you will have to store the current position, and move it based on the difference between the original location that you touch, and the end location that you stop touching.

How can I react when a user touches an HTML element on an iPhone?

I'm displaying some HTML content in my iPhone app using a UIWebView. I have an image link, and I want it to change when the user touches it - at the moment the user puts a finger on the screen, rather than waiting until they lift their finger back off.
What CSS or JavaScript concept could accomplish this? I've looked at the hover and active states in CSS, but they don't seem to be what I'm after: hover relates to touch-up rather than touch-down, while active seems to have no effect at all.

You could try this.
I think it should be what you are looking for!
http://articles.sitepoint.com/article/iphone-development-12-tips/2
8: Touch Events
Of course, you use your iPhone with a
finger instead of a mouse; rather than
clicking, you tap. What’s more, you
can use several fingers to touch and
tap. On the iPhone, mouse events are
replaced by touch events. They are:
touchstart
touchend
touchmove
touchcancel (when the system cancels the touch)
When you subscribe to any of those
events, your event listener will
receive an event object. The event
object has some important properties,
such as:
touches — a collection of touch objects, one for each finger that
touches the screen. The touch objects
have, for example, pageX and pageY
properties containing the coordinates
of the touch within the page.
targetTouches — works like touches, but only registers touches on
a target element as opposed to the
whole page.
The next example is a simple
implementation of drag and drop. Let’s
put a box on a blank page and drag it
around. All you need to do is
subscribe to the touchmove event and
update the position of the box as the
finger moves around, like so:
window.addEventListener('load', function() {
var b = document.getElementById('box'),
xbox = b.offsetWidth / 2, // half the box width
ybox = b.offsetHeight / 2, // half the box height
bstyle = b.style; // cached access to the style object
b.addEventListener('touchmove', function(event) {
event.preventDefault(); // the default behaviour is scrolling
bstyle.left = event.targetTouches[0].pageX - xbox + 'px';
bstyle.top = event.targetTouches[0].pageY - ybox + 'px';
}, false);
}, false);
The touchmove event listener first cancels the default behavior of the finger move—otherwise Safari will scroll the page. The collection event.targetTouches contains a list of data for each finger currently on the target div element.
We only care about one finger, so we use event.targetTouches[0]. Then pageX gives us the X coordinate of the finger. From this value we subtract half the width of the div so that the finger stays in the center of the box.
Hope it helps!

Try the Javascript "onMouseDown", hopefully the mobile Safari will fire the event.
Link