http://jsfiddle.net/3qMnM/1/
HTML:
<div class="info-panel"></div>
<div class="image">
<img src="http://placehold.it/960x1400">
</div>
CSS:
.image {
height: 100%;
width: auto;
margin-right: 200px;
}
.info-panel {
position: fixed;
width: 200px;
height: 100%;
background-color: red;
right: 0px;
}
I'm trying to scale images down (never up) dynamically to fit into the image-div (without cropping), which is variable in height (100%) and width (set to auto). The image also needs to be centered (vertically and horizontally) and have equal padding of a few pixels top and bottom.
There is an info panel next to the image container as you can see in the fiddle, but I'm not sure if this is relevant.
Do my statements make sense?
Thanks, I have spent way too much time experimenting with this already! :/
If I understand correctly, you want something like this.
It scales down if the image is too large, but keeps the original size when it fits inside the window. In other words, it never scales up - only down.
It is a combination of CSS and some jQuery:
This short JS centers the image vertically:
function verticallyCenterImage(){
var $img = $('.image img'),
windowHeight = $(window).outerHeight();
if($img.height() < windowHeight){
var delta = windowHeight - $img.height();
$img.css('margin-top', (delta / 2) + 'px');
}else{
$img.attr('style', '');
}
}
And this line of CSS keeps the image centered horizontally:
.image {
padding-right: 200px;
text-align: center; /* <- this one */
max-height: 100%;
overflow: hidden;
}
And to keep the original size of the image, I just set the max height and width on the img inside the .image class, like so:
.image img {
max-width: 96%;
max-height: 96%;
margin: 2%;
}
You can adjust the size and margins to your needs, just remember to keep them in relation too each other :)
Some of the techniques discussed here could work for you:
http://css-tricks.com/centering-in-the-unknown/
The trick there is to use table elements, or CSS 2.1 table display.
Edit: More approaches here: http://www.vanseodesign.com/css/vertical-centering/
You are mixing px with %. If you want to achieve that only by CSS, you need to use % for both widths:
.image {
width: 85%;
}
.image img {
width: 100%;
}
.info-panel {
position: fixed;
width: 15%;
height: 100%;
background-color: red;
right: 0px;
}
... otherwise, you have to use JS to calculate the current available width on the left side and assing it the .image div:
HTML
<div class="info-panel"></div>
<div class="image">
<img src="http://placehold.it/960x1400" />
</div>
CSS
.image {
min-height: 600px;
width: auto;
}
.image img {
width: 100%;
}
.info-panel {
position: fixed;
width: 200px;
height: 100%;
background-color: red;
right: 0px;
}
JS (jQuery)
$(document).ready(function() {
$('.image')
.css('min-height', 'auto')
.height($(window).height())
.width($(window).width() - $('.info-panel').width())
;
});
Related
I need to scale an image inside a div properly, so that the image keeps its proportions and so that either the width is equal to 100% or the height is equal to 100%.
So basically that the image takes up as much space as possible in the div whilst maintaining aspect ratio. And lets keep in mind that the div can change width and height.
So I have the intuition for this, but I don't have the code ...
The idea would be to get the ratio (height/width) of the div with
JavaScript/jQuery. => ratio A Then get ratio (height/width) of the image. => ratio B
Note: If ratio > 1, then we have a portrait image or div.
And if ratio < 1, then we have a landscape image or div.
If ratio A < ratio B, then we want height of image to be set at 100%;
If ratio A > ratio B, then we want width of image to be set at 100%;
So if we have a responsive div, width or height = 100% will change dynamically.
Is this possible?
Here are 2(css) solutions :
http://codepen.io/cryptcslaughtr/pen/LNoMBY
.container {
width: 100px;
height: 200px;
border: 1px solid #333;
background: url("https://3.bp.blogspot.com/-W__wiaHUjwI/Vt3Grd8df0I/AAAAAAAAA78/7xqUNj8ujtY/s1600/image02.png") no-repeat left top / contain;
}
<div class="container"></div>
http://codepen.io/cryptcslaughtr/pen/qZGLvE
.container {
width: 250px;
height: 130px;
border: 1px solid #333;
}
.container img {
max-width: 100%;
max-height: 100%;
}
<div class="container">
<img src="https://3.bp.blogspot.com/-W__wiaHUjwI/Vt3Grd8df0I/AAAAAAAAA78/7xqUNj8ujtY/s1600/image02.png" alt="Put your image" />
</div>
You can simply set parent div to position relative, and overflow hidden. And then do this:
.bg-img {
bottom: -1000px;
left: -1000px;
margin: auto;
min-height: 100%;
min-width: 100%;
position: absolute;
right: -1000px;
top: -1000px;
}
This will insure no matter whats the size of the container it will always cover it 100%. This will also contain image proportions.
If you need img tag for SEO/alt/ARIA/whatever, here is modified Cryptc_Slaughtr's solutions combined into one:
.container {
width: 250px;
height: 200px;
border: 1px solid #333;
background: url("https://3.bp.blogspot.com/-W__wiaHUjwI/Vt3Grd8df0I/AAAAAAAAA78/7xqUNj8ujtY/s1600/image02.png") no-repeat left top / contain;
}
.container img {
width:100%;
height: 100%;
opacity:0;
}
<div class="container"><img src="https://3.bp.blogspot.com/-W__wiaHUjwI/Vt3Grd8df0I/AAAAAAAAA78/7xqUNj8ujtY/s1600/image02.png" alt="Put your image" title="Put your image" /></div>
I'm building an app in Webkit for Android using HTML and CSS. I have fixed position header and sometimes fixed position footer(based on the module). When the content is more, I don't want the scrollbar to overlay the fixed header. Hiding it behind the header will also work. How can I achieve this without fixing height for the wrapper or using height: calc(); CSS for the wrapper?
I want app scrollbar to be like this:
Instead, it is like this now:
Here is the sample code:
.header {
position: fixed;
background-color: red;
left: 0;
top: 0;
width: 100%;
z-index: 999;
height: 60px;
}
.wrapper {
padding-top: 60px;
min-height: 100%;
height: auto;
}
.footer {
position: fixed;
background-color: grey;
left: 0;
bottom: 0;
width: 100%;
height: 50px;
}
jsfiddle
You said that you don't want to fixe the .wrapperheight, but I think, you should fixe it, because there is no way to hide this scrollbar behind the div header element.
.wrapper {
margin-top: 60px;
min-height: 100%;
height: 320px;
overflow-y: auto;
}
Demo: http://jsfiddle.net/9hy6ybsz/4/
I'm not sure if my solution gonna work for you. You need to setup the height of your div="wrapper" and add CSS property overflow-y:
height: calc(100% - (60px + 50px));
Example, where 60px is the header height and 50px is the footer height
.wrapper {
margin-top: 60px;
overflow: auto;
background: yellow;
height: calc(100% - (60px + 50px));
display:block;
}
Working JSFiddle -> http://jsfiddle.net/9hy6ybsz/1/
Create a new div tag , which acts as a parent tag.
and apply scroll for it.
then create the header div and maintain Fixed position.so you can get the scroll over the fixed DIV!
I'm creating a responsive site and I'd like to use a really wide image slider (I'm sure you've seen the type of thing).
What I'd like to happen is for the main site to be, for example, maximum 1,200 pixels wide and use a fluid width. I'd then like the image slider to be, for example, 2,000 pixels wide. On a static site this is relatively straightforward as I could simply give the image slider a negative left margin of -400 pixels to center it. Sadly in the case of a responsive site this isn't possible as that offset needs to be fluid.
I did come across some script that made the offset fluid but this only worked when the screen was wider than the site width (i.e the max width of the main content area). When the window then becomes narrower than this max width the script fails to keep the image slider centered .
Any ideas how this could be written to keep the image slider centered horizontally in the window, whether the users window is wide or narrow?
<script type="text/javascript">
function setMargins() {
width = $(window).width();
containerWidth = $("#flexslider_width").width();
leftMargin = (containerWidth-width)/2;
$("#flexslider_width").css("marginLeft", -leftMargin);
}
$(document).ready(function() {
setMargins();
$(window).resize(function() {
setMargins();
});
});
</script>
Thanks for any thoughts in advance,
Tom
EDIT: I understand now. Try this: http://codepen.io/anon/pen/azoRwo
.outer{
position: relative;
width: 100%;
height: 100px;
border: 2px solid red;
overflow: hidden;
}
.image {
position: absolute;
left: 50%; /* Move to the middle of the parent */
margin-right: -50%; /* Remove that extra width */
transform: translate(-50%, 0); /* Move left again; No IE8 support*/
width: 1000px;
height: 96px;
border: 2px solid cyan; /* Just useful for debugging */
background: url('http://i.imgur.com/rBkbXS3.jpg');
overflow: hidden;
}
Basically we move right, then left, using percentages of the parent's width. If you want the same functionality in IE8, you'll have to use JavaScript.
Reference: http://www.w3.org/Style/Examples/007/center.en.html
Alright, check this out: http://codepen.io/anon/pen/LEPgLp
html, body {
margin: 0;
}
.image-slider{
width: 100%;
max-width: 800px;
height: 100px;
border: 1px solid red;
margin: 0 auto;
text-align: center;
}
.main{
width: 100%;
max-width: 800px;
height: 100px;
border: 1px solid green;
margin: 0 auto;
position: relative;
}
#media only screen and (max-width: 800px) {
body {
overflow: hidden;
}
.image-slider {
width: 800px;
position: absolute;
left: 50%;
margin-left: -400px;
top: 0;
}
.main {
margin-top: 100px;
}
}
When your window is smaller than 800px (was easier to develop. just change the values), I'll position your slider absolute and in the middle. Because of the absolute position, your .main div will move to the top so I'll add a margin-top. Just change your margin-top to the hight of your slider. Good luck!
I have 2x Divs and 1x Img with the following CSS
#StageDiv {
position: absolute;
left: 50%;
margin-left: -200px;
}
#LogoDiv {
position: absolute;
margin-top: 135px;
left: 50%;
margin-left: -500px;
}
#logoimg {
/* max-width: 75%; /* */
width: 1000px; /* */
}
inside of #logoimg, I would like to use max-width: 75%; and then have margin-left: of both #LogoDiv and #StageDiv be a function of #logoimg as it changes
http://jsfiddle.net/3KLUW/1/
Is this possible in pure CSS or will I have to do this in javascript in a on resize event? (not sure what the actual function call is currently but im sure my buddy google will know) I think in the long run, I will most likely have to use a javascript event to scale my kineticjs stage anyway but I am curious to know if there is some CSS wizardry to do the first part.
Thoughts?
Edit:
window.onresize=function(){
var img = document.getElementById('logoimg');
var width = img.offsetWidth;
var div = document.getElementById('LogoDiv');
div.style.marginLeft= "-" + width/2 + "px";
};
still would be interested in a CSS solution
If you can get away with a wrapper div for the whole logo:
<div id="logo">
<div id="StageDiv">...</div>
<div id="LogoDiv">
<img id="logoimg" src="..." />
</div>
</div>
Then you can set the width and max-width on it, and use margin: auto to center it on the page:
#logo {
width: 1000px;
max-width: 75%;
margin: auto;
position: relative;
}
And positioning the other elements become much easier:
#LogoDiv {
top: 135px;
position: absolute;
}
#StageDiv {
text-align: center;
}
#logoimg {
width: 100%;
}
The margin: auto and text-align: center together give us the automatic margin you wanted.
Updated fiddle: http://jsfiddle.net/3KLUW/2/
The canvas will need to be scaled though, as you said on the question.
I'm having some trouble with a page that has a floating background image (absolutely positioned) where the image is dynamically changed out via javascript. Basically this is a big gallery that changes behind a portfolio:
I have a section of markup that looks like this:
<div class="content">
<div class="content-container">
<div class="content-image">
<img id="galleryTarget" src="../images/main/source.jpg" class="image-resize" alt="background image"/>
</div>
...etc...
Here's the relevant CSS classes:
.image-resize {
position: absolute;
min-height: 750px;
min-width: 1000px;
width: 100%;
left: 0;
text-align: left;
vertical-align: middle;
margin-top: -25%;
top: 25%;
}
.content-image {
position: absolute;
top: 0;
left: 200px;
width: 100%;
min-height: 750px;
max-height: 750px;
min-width:1000px;
overflow:visible;
opacity: 0.5;
z-index: 1;
}
.content-container {
position: relative;
min-height: 750px;
}
.content {
position: absolute;
top: 0;
width: 100%;
max-height: 750px;
overflow: hidden;
background: purple;
z-index: -5;
}
This is all absolutely positioned so that I can swap out the image source with Javascript and then dynamically resize the container (background) to fill the new content. There's minimum bounds so it always has a size.
What I'm trying to do is to pin this image to a CENTER point so that when it is resized the interesting parts of the image (rarely the top left corner) are displayed.
In the inspector in chrome I see that top and margin-top are never the same value even though they have the same (percentage) value. What am I missing here?
Example:
top: 187.5px and margin-top: -389.5px. It looks as though margin-top uses the img-source resolution and top uses something for the life of me I can't figure out--I'm assuming min-height + the offset in the page?
Any help here would be appreciated, this is a rather large part of the design and I'd love to have it better than what it is.
Browsers:
Chrome Version: 30.0.1599.66 m
Android Chrome: 30.0.1599.82
This does fix the problem in chrome--but I'd like to know why it is using 1000px as the baseline for the margin instead of the 750px of the unit.
/*Hack of a vector similar to 50%*/
margin-top: calc(-50% * 0.75);
top: 50%;