how is it possible to center a div's scrollbar?
This is what I have:
<div id="mydiv" style="width:1000px;overflow:auto;">
<img src="..." style="width:100%;height:250px;" />
</div>
$(window).on('resize', function () {
$('#mydiv').scrollLeft(
$( "#mydiv" ).width() - $( "#mydiv" ).width()/2
);
});
But this doesn't work. It is not exactly centering. Too bad I can't set percent 50%. The scrollLeft(() function requires an integer.
Thanks!
here is your solution i have checked it with every possible width which was less than the image width. Even measured both left and right side space of scroll bar with plastic ruler ..LOL. :) to check if both sides are equal
http://jsfiddle.net/HSJft/5/
var outer=document.getElementById('mydiv').offsetWidth
var inner=document.getElementById('im').offsetWidth;
console.log(inner);
$('#mydiv').scrollLeft((inner-outer)/2)
<div id="mydiv" style="overflow:auto; overflow-y:hidden;width:300px">
<img id="im" src="http://eofdreams.com/data_images/dreams/image/image-15.jpg" />
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
Easy solution:
https://jsfiddle.net/HSJft/21/
Vertical Scroll:
$(scrollWrapper).scrollTop(($(content).height() - $(scrollWrapper).height())/2);
Horizontal Scroll:
$(scrollWrapper).scrollLeft(($(content).width() - $(scrollWrapper).width())/2);
Related
I have a problem with the code below. The window does not scroll to the third section. The code jumps from slide two to slide four.
In my console log the data is correct 600, 1200, 1800 and 2400.
I tried different things but the bug is still there.
<html>
<head>
<style>
body, html{margin:0;}
.slide{height: 600px;}
button{position:fixed; top:0; left:50%; margin-left:-32px;}
</style>
</head>
<body>
<div class="container">
<div class="slide onscreen" style="background-color:#FFC000;"></div>
<div class="slide" style="background-color:#FF4800;"></div>
<div class="slide" style="background-color:#FFC480;"></div>
<div class="slide" style="background-color:#AA4560;"></div>
<div class="slide" style="background-color:#000000;"></div>
</div>
<button onclick="next()">volgende</button>
<script>
var section = document.getElementsByClassName("onscreen");
function next() {
if (section[0].nextElementSibling) {
section[0].nextElementSibling.className = "slide onscreen";
section[0].className = "slide";
var newTop = section[0].offsetTop;
window.scrollBy(0, newTop);
console.log(newTop);
}
}
</script>
</body>
</html>
These slides are all siblings. So offsetTop is going to be incrementally greater on each slide. Slide 1, 600px, slide 2, 1200px, and so on. window.scrollBy scrolls to the windows current position + the amount given. So if you are at window.scrollY = 0, and pass 600, you'll be at window.scrollY = 600. When you pass 1200 on the next go round, you'll be at window.scrollY = 1800! So now it appears as if you've skipped over slide 3, because you scrolled 2x a slide's height.
Possible answer, if you don't want the challenge of figuring the rest out:
If you have a hardcoded height for your slides, you could try passing a hardcoded scrollBy value as well. Or if you want to make your code a bit more flexible, you could query each slider for its height and pass that value instead. Then you can adjust your slide's height in css-land without breaking your js logic.
I want a slider with content. but the content should appear only when mouse hover. This is the code I'm using:
<div id="slideshow" style="width:560px; background:#999;">
<div id="slidesContainer">
<div class="slide">
<img src="js/1.jpg" />
<div> some text </div>
</div>
<div class="slide">
<img src="js/2.jpg" />
<div> some text </div>
</div>
<div class="slide">
<img src="js/3.jpg" />
<div> some text </div>
</div>
<div class="slide">
<img src="js/4.jpg" />
<div> some text </div>
</div>
</div>
</div>
and the jquery 1.8.3 lib and this code
$(document).ready(function(){
var currentPosition = 0;
var slideWidth = 560;
var slides = $('.slide');
var numberOfSlides = slides.length;
// Remove scrollbar in JS
$('#slidesContainer').css('overflow', 'hidden');
// Wrap all .slides with #slideInner div
slides
.wrapAll('<div id="slideInner"></div>')
// Float left to display horizontally, readjust .slides width
.css({
'float' : 'left',
'width' : slideWidth
});
// Set #slideInner width equal to total width of all slides
$('#slideInner').css('width', slideWidth * numberOfSlides);
// Hide left arrow control on first load
manageControls(currentPosition);
// manageControls: Hides and Shows controls depending on currentPosition
function manageControls(position){
if(position >= 4)
{
position=0;
currentPosition=0;
}
// Hide left arrow if position is first slide
if(position==0){ $('#leftControl').hide() } else{ $('#leftControl').show() }
// Hide right arrow if position is last slide
if(position==numberOfSlides-1){ $('#rightControl').hide() } else{ $('#rightControl').show() }
}
function Aplay(){
// Determine new position
currentPosition = currentPosition+1 ;
// Hide / show controls
manageControls(currentPosition);
// Move slideInner using margin-left
$('#slideInner').animate({
'marginLeft' : slideWidth*(-currentPosition)
});
setTimeout(function(){Aplay();},2000);
}
setTimeout(Aplay(),20000);
});
now the <div> some text </div> should appear only when mouse hover, example: http://www.backslash.gr/demos/contenthover-jquery-plugin/#demo4
CSS
<style type="text/css">
.title {visibility:hidden;}
</style>
HTML add a class title to all needed DIV elements
<div class="title"> some text </div>
Add this to your script
$('#slideInner').mouseover(function() {
$('#slideInner .title').css('visibility', 'visible');
});
$('#slideInner').mouseout(function() {
$('#slideInner .title').css('visibility', 'hidden');
});
Working jsBin
A simple solution would be to set up your 'slide' divs like this:
<div class="slide" onMouseOver="$('#TEXT1').css('display','block')" onMouseOut="$('#TEXT1').css('display','none')">
<img src="js/1.jpg" />
<div id="TEXT1" style="display:none;"> some text </div>
</div>
It's easy and i think this is the fastest solution, because require less jquery than the others (= keep your code clean)
Add the following class to every div which contain the description: class="slide-desc" to your HTML
Add var slideDesc = $('.slide-desc'); to your JS, which is just to fit your way of write jQuery, and slideDesc.hide(); (or $('.slide-desc').hide;, to use a faster way instead). This statement (it's better to call the .hide() method in first line of your JS, to avoid the description flashing while page is loading. Put it just after your declaration of variables.
Add somewhere in the JS these lines: $('#slidesContainer').hover(function(){
slideDesc.show();
});
You've done! :D
I am creating a project where I want to be able to drag a div (a drawer) that is (mostly) positioned off the bottom of the screen a fixed distance on the Y axis. The distance I want to move is the height of the div (drawer - minus the drawer handle).
It was pretty easy to get this working from top to bottom, but reversing it is posing to be quite a challenge. I feel like it might just be a simple math error.
I have put together a fiddle to better illustrate the issues I'm having.
http://jsfiddle.net/q8DE6/2/
Here's my code:
HTML
<div id="panelWrapper">
<div id="panel" class="panel">
<p> The height of this drawer is dynamic, and will slide the appropriate amounted based on the height of the content. </p>
<p> Any type of content can be included in here. The body of the drawer and the drawer pull tab can also be styled as you see fit, just modify the css/styles.css file. </p>
<!--necessary div for slide tab, modify as needed, but don't delete -->
<div class="slide">
<a id="drawerSlide" href="#" class="drawer-slide">
<table id="sTab" class="slideTab">
<tr>
<td id="stText1"></td>
<td id="stImg">Pull here.</td>
<td id="stText2"></td>
</tr>
</table>
</a>
</div>
</div><!--/panel -->
</div><!--/panelWrapper -->
<div id="content">
<div id="header">
<div id="menuBar">
<h3>Header Bar Text.</h3>
</div>
</div>
<div id="container">
</div>
<div id="footer">
<p>Footer Area.</p>
</div>
</div><!--/content -->
Slide Function:
JS:
function drawerSlide(slideDir) {
switch (slideDir) {
case 'bottomToTop':
//drawer styling
$('.panel, .slide').addClass('botToTop');
$('.panel').addClass('panelTB');
$('.slide').addClass('slideBotToTop');
$('#sTab').addClass('slideTab');
$('.panel p').filter(":first").css('padding-top','50px');
//hide overflown Y axis content. Hopefully this won't cause any conflicts with your existing code/page.
$('body').css('overflow-y','hidden');
botStartPos = $(window).height() - 50;
offset = $('#panel').offset();
panelHeight = $('#panel').outerHeight();
topEndPos = botStartPos - panelHeight +50;
yPos = botStartPos;
// if you need a different drawer starting point, adjust the starting position here (50).
panelHeight = parseFloat(panelHeight) - 50;
console.log("botStartPos:" + botStartPos);
console.log("topEndPos:" + topEndPos);
console.log("yPos:" + yPos);
$('.panel').css('top', botStartPos);
$('#panel').draggable({
axis: "y",
containment: [0, botStartPos, 0, topEndPos] //0, botStartPos, 300, topEndPos
},
{
drag: function( event, ui ) {
if (yPos > botStartPos || yPos < topEndPos) {
return false;
}
else {
offset = $(this).offset();
yPos = offset.top;
console.log(yPos);
}
}
});
}
}
$(document).ready(function() {
drawerSlide("bottomToTop");
});
I'm thinking the issue might be with the way I'm using the offset.top command to move the drawer, but I'm stumped as to how to do it correctly.
Right now what is happening, is when you click/hold the handle, it "jumps" up the fixed distance, instead of being able to drag it. Also, you can't drag down to put the drawer away, but you can drag up once again and it "jumps" down the fixed distance. Not really what I'm after.
The desired result I'm looking for is one of a typical "drawer" behavior. When the user clicks and holds on the handle, they can "pull" the drawer up the fixed distance, and then "push" it back down the same fixed distance, so the handle never falls off screen.
My guess is it that it's a math problem with the containment function. I still don't fully understand it well, so the problem may lie within the coordinates I'm using?
Any advice would be most appreciated. :)
I have one background image(City image) with scroll, on that image I am placing some small images(Just like bomb images on the city image). I have canvas width and height depending on these variables I am placing the bomb image on the city image. When I place the bomb image at can.width/2 and can.height/2 in 430*300 devices, image will be on the center but when I try testing on bigger screen mobile, bomb image position is changing. I need to place bomb image in the same location for all devices. When I zoom in also position is changing. Anybody please help me to solve this scenario.
Here is my code
function smallBombImg(){
document.getElementById('carImg1').style.top = can.width/2 +"px";
document.getElementById('carImg1').style.left = can.height/2 +"px";
//document.getElementById('carImg1').style.background-attachment = "fixed";
document.getElementById('carImg1').style.display = "block";
document.getElementById('carImg1').src = 'img/bomb1.png';
}
HTML code is here
<body>
<div id="container">
<canvas id="can"></canvas>
</div>
<div id="btn">
<input type="image" id="zoomIn" src="img/up.png" onclick="zoomIn()" />
<input type="image" id="zoomOut" src="img/down.png"
onclick="zoomOut()" />
</div>
<div id="score">
<p id="scoreCount">
<b></b>
</p>
</div>
<div>
<img alt="simple1" id="carImg1" style="position: absolute; display: none;" />
</div>
</body>
I have to be brief, I am very sorry but I am running late.
Using jQuery:
var windowEventTimeoutEnded;
$(window).resize(function() {
clearTimeout(windowEventTimeoutEnded);
$(window).height(); // gets the height of the window
$(window).width(); // gets the width of the window
// This ensures the below does not trigger until the resize event is finished
windowEventTimeoutEnded = setTimeout(function() {
// Perform your resizing math and logic here, such
canvas.css({
width: 1234,
height: 235,
position: 'absolute' // etc, etc, etc
})
}, 500 );
});
Sorry for the brevity, hope this helps. I will return later and check if this helped and add to it if necessary, good luck!
I'm using the cycle plugin on some divs, like this:
<div class="sections">
<div class="Section"> <img /> text </div>
<div class="Section"> <img /> text </div>
<div class="Section"> <img /> text </div>
</div>
all the .section divs have variable height, based on their contents.
How can I make cycle not to resize the container div (sections) to the largest child height? Instead I want the container to resize on every animation to the current child height.
ok, I managed to do it by hooking a function on 'after' event:
function onAfter(curr, next, opts, fwd) {
var $ht = $(this).height();
//set the container's height to that of the current slide
$(this).parent().animate({height: $ht});
}
found the info here:
http://forum.jquery.com/topic/jquery-cycle-auto-height
set containerResize option to 0 and try. More option details here.
I've done it a little bit different:
$('.cycle-list').cycle({
containerResize: 0,
before: function(currSlideElement, nextSlideElement, options, forwardFlag) {
var container = $(this).parent();
container.css('height', Math.max(container.height(), $(nextSlideElement).height()));
},
after: function(currSlideElement, nextSlideElement, options, forwardFlag) {
$(this).parent().css('height', $(this).height());
}
});
My items had different height as well. In the before, it makes sure the container is big enough for the bigger of the 2 slides. In the after, it just resizes to the next slide.
This way it never over-flows because your container is too small.
note: this is for cycle 1