Ok, so I've created a little plugin that takes a bunch of elements and creates a sort of never ending list. I'll try to explain...
I have a div, and it's got about 20 elements tags in it. When the user scrolls up, the top element moves out of view and is moved to the bottom of the list. And vice-versa so that when the user scrolls down, the bottom element is moved to the top of the list.
This is specifically for Mobile Safari (iPad, iPhone) web content
What I would like to do is implement inertia so the scrolling slows to a halt in response to how fast or slow the user is scrolling when their finger leaves the screen. Just like the inertia commonly found in the iPhone / iPad UI.
The problem is, every time an element moves to the top or the bottom of the list, the scollTop value for the parent div is adjusted to make it look like all the elements are staying in the same place. Which means the scrollTop value is never more than the top elements total height. So there's no value I can think of that I can keep on manipulating to give the illusion of inertia.
I'm stumped. Does anyone have any suggestions?
iScroll implements scrolling with inertia, but I'm not sure how it would react to you adding and removing elements mid-scroll. Might be worth looking into though.
Related
I know this question sounds confusing, so here's a better explanation:
I'm using a mobile. Say there's a scrollable element somewhere in the body. When I scroll the element and it reaches the bottom, I want instead of getting stuck for keep scrolling the element, it scrolls the page instead. That's also true if I reach the top of the element, it scrolls up the page, not getting stuck.
I tested it on two different mobile phones with the latest version of Chrome. The First one does exactly that. Weirdly enough, the second one only works when it gets to the top but not to the bottom. Is there any way to make it always work irrespective of the environment (mobile phone or browser) we are using?
Edit: What I'm trying to achieve with this
Desktop:
I want a way so that the buttons placed at the bottom of the content are not so distanced from the user's view. If we remove the scrollbar, then the users have to scroll all the way to the end of the content to be able to click the buttons.
The problem with this method is that, on mobile, in some browsers, it blocks the user from scrolling the page, even after reaching the end of the element. So they have to touch the edges of the screen to be able to scroll the page instead of the element.
What I want is, for users having difficulty touching the edges, they can still scroll the element. And when it reaches the bottom of the element, it scrolls the page.
I know this is weird. I know some of the better tricks like using the Read More-Read Less button, but it requires JavaScript I guess? I'm in a situation that's really hard to use JavaScript at the moment (shortly because of how bad the code is organized), and looking for a way if there's a simple trick using pure CSS. Any help or idea is appreciated!
I wasn't able to find any events to hook into for this - I want to take control over the scroll distance when the user does things like moving the mouse wheel, clicking a scroll button (up or down), clicking the empty space of a scroll bar, etc.
For example, if I have a list of things, and each row is 16px tall, how would I be able to force it to scroll 16 pixels for single scroll events (i.e. mouse wheel up/down, or clicking the scroll button, if one exists)? And then, if scrolling by clicking the empty scroll bar, how can I ensure it scrolls by a fixed amount, so when it's done scrolling, it would be perfectly aligned? The best example I can give is how it behaves in Excel. Provided you have the scroll lines to be set to 1 line in settings, scrolling up or down will move one row at a time. Clicking the empty part of the scroll bar moves down exactly to the next not-fully-visible row.
My research, up until now, indicates I'll be using the .scroll() function (at least if I'm using jQuery), but I'm completely stumped at the plan of attack, even moreso because I'm unable to find any way to differentiate between a mouse wheel scroll, button scroll, or scrollbar jump (or whatever the terms would be).
Is there also a way to restrict this in CSS, avoiding any JavaScript at all?
To achieve this, you need to use scroll-snap-type, as stated by DM in the comments.
You'd set the parent div to have scroll-snap-type: y mandatory;, and it's immediate children elements would have scroll-snap-align: top (or bottom)! This should allow rows to be viewed perfectly, provided the containing element is an appropriate size (and assuming each child element is a known fixed size).
I am working with the Skrollr Plugin.
I am running jQuery 1.9.1 too.
I have found out that parallax pages are a lot of fun on a desktop with a mouse wheel to scroll. On an iPad or other touch devices nobody wants to scroll through that much animation, no matter how cool it is.. poor user experience. So what I decided to do is add two buttons. One on the middle right side and the other on the middle left side for the thumbs. You press the one on the right and you autoscroll to the next section. Vice versa for the left side.
Well instead of testing a bunch of different screen sizes and manually adding a bunch of values to an array and then having a script figure out what size screen it is and go through the custom array... I would rather have a function that looks up the IDs and grab the scrollTopPosition and push that into the array.
As far as the plugins documentation I have only seen this function. s.getScrollTop. That returns your current scroll position.
I tried the following commands:
document.getElementById('id').getBoundingClientRect();
document.getElementById('id').offsetTop;
$('#id').offset().top;
$("#id").position();
All gave me the wrong values when comparing to the s.getScrollTop() return value.
This is the last item in my icebox and I would love to knock it out today. Thank you for any help!
I am designing an interactive web game that takes place entirely in the browser. It uses html5, and everything (including the elements) is part of the game world. Since this is the case, I need some pretty strict control over the positioning of my elements, scroll position, zooming, etc.
One particular level requires that an element be placed off screen (just outside the viewport) so that the user must scroll the page to find it. Unfortunately, after scrolling, the page seems to record the new width of the page including the originally unseen element. When the page is refreshed, the zoom level is adjusted to fit the entire screen with the hidden element into the viewport. This gives away the puzzle and ruins the level.
I know that browsers store information like scroll position so that when a user revisits the page they can pick up right where they left off. This is great for some things, but bad for my purposes. Is there a way to prevent this caching behavior of my browsers? Is there a way to get or set the zoom level of a page using JavaScript?
Currently I am using the code below to reset the scroll position right before the user leaves the page. It works pretty well, but the user can see the page scroll right before leaving.
window.addEventListener("beforeunload",function(event_){
window.scrollTo(0,0);
/* What I would love is if there were a way to do this: */
// window.zoomTo(1.0);
/* But I'm sure that's asking for too much. */
});
I managed to fix my problem by keeping the hidden element out of the html flow all together by setting its css position property to fixed. I simulate page scrolling by changing the elements style.left value with some custom touch event handlers. The page has no need to resize or zoom with the addition of the off screen element because fixed position elements do not effect layout.
This doesn't answer my question about resetting the zoom level, however, and I would still appreciate any insight anyone may have.
In General:
I need my nav to behave like a mobile app (swipe effect), but WITHOUT accessing it via a mobile product. (So JQuery Mobile and such isn't applicable here... at least I don't think.)
Specifics:
My nav (example attached below) is a set of horizontally arranged icons. I would like to be able to scroll horizontally, but instead of simply scrolling the icons over, I'd like them to slide in increments (much like how an iPhone's pages slide into discrete positions with swipes across the screen.) This means regardless of how much the user scrolls, only the same amount of slide is performed.
View work-in-progress here
My Problem:
So I currently have this (crappy/buggy) version working, but it's based on JQuery's .mousemove() which means as I cause the menu to move, the cursor is still also moving and no longer over the icon I wish to click. If I based it on .scroll(), then the containing div would have to be scrollable (which would show the scrollbars).
So: Is there...
a) an example of this already done somewhere? or
b) a way to make a div scrollable but without showing the scrollbars
This site is being used in a specific way for a specific purpose, so please don't reply just to tell me that hidden scrollbars on a scrollable div is bad juju/annoying for the users.
I found something called "Web In Touch". Could this help?
Many MANY thanks in advance.
http://www.jacksasylum.eu/ContentFlow/
Have you tried content flow? It can do horizontal scrolling for you on button presses (and you can map this to something else). I understand this isn't what you want exactly, but it might work, since you want to horizontally flow/scroll image icons.