How can I get windowWidth, windowHeight, pageWidth, pageHeight, screenWidth, screenHeight, pageX, pageY, screenX, screenY which will work in all major browsers?
You can get the size of the window or document with jQuery:
// Size of browser viewport.
$(window).height();
$(window).width();
// Size of HTML document (same as pageHeight/pageWidth in screenshot).
$(document).height();
$(document).width();
For screen size you can use the screen object:
window.screen.height;
window.screen.width;
This has everything you need to know: Get viewport/window size
but in short:
var win = window,
doc = document,
docElem = doc.documentElement,
body = doc.getElementsByTagName('body')[0],
x = win.innerWidth || docElem.clientWidth || body.clientWidth,
y = win.innerHeight|| docElem.clientHeight|| body.clientHeight;
alert(x + ' × ' + y);
Fiddle
Please stop editing this answer. It's been edited 22 times now by different people to match their code format preference. It's also been pointed out that this isn't required if you only want to target modern browsers - if so you only need the following:
const width = window.innerWidth || document.documentElement.clientWidth ||
document.body.clientWidth;
const height = window.innerHeight|| document.documentElement.clientHeight||
document.body.clientHeight;
console.log(width, height);
Here is a cross browser solution with pure JavaScript (Source):
var width = window.innerWidth
|| document.documentElement.clientWidth
|| document.body.clientWidth;
var height = window.innerHeight
|| document.documentElement.clientHeight
|| document.body.clientHeight;
A non-jQuery way to get the available screen dimension. window.screen.width/height has already been put up, but for responsive webdesign and completeness sake I think its worth to mention those attributes:
alert(window.screen.availWidth);
alert(window.screen.availHeight);
http://www.quirksmode.org/dom/w3c_cssom.html#t10 :
availWidth and availHeight - The available width and height on the
screen (excluding OS taskbars and such).
But when we talk about responsive screens and if we want to handle it using jQuery for some reason,
window.innerWidth, window.innerHeight
gives the correct measurement. Even it removes the scroll-bar's extra space and we don't need to worry about adjusting that space :)
Full 2020
I am surprised that question have about 10 years and it looks like so far nobody has given a full answer (with 10 values) yet. So I carefully analyse OP question (especially picture) and have some remarks
center of coordinate system (0,0) is in the viewport (browser window without bars and main borders) top left corner and axes are directed to right and down (what was marked on OP picture) so the values of pageX, pageY, screenX, screenY must be negative (or zero if page is small or not scrolled)
for screenHeight/Width OP wants to count screen height/width including system menu bar (eg. in MacOs) - this is why we NOT use .availWidth/Height (which not count it)
for windowWidth/Height OP don't want to count size of scroll bars so we use .clientWidth/Height
the screenY - in below solution we add to position of top left browser corner (window.screenY) the height of its menu/tabls/url bar). But it is difficult to calculate that value if download-bottom bar appears in browser and/or if developer console is open on page bottom - in that case this value will be increased of size of that bar/console height in below solution. Probably it is impossible to read value of bar/console height to make correction (without some trick like asking user to close that bar/console before measurements...)
pageWidth - in case when pageWidth is smaller than windowWidth we need to manually calculate size of <body> children elements to get this value (we do example calculation in contentWidth in below solution - but in general this can be difficult for that case)
for simplicity I assume that <body> margin=0 - if not then you should consider this values when calculate pageWidth/Height and pageX/Y
function sizes() {
const contentWidth = [...document.body.children].reduce(
(a, el) => Math.max(a, el.getBoundingClientRect().right), 0)
- document.body.getBoundingClientRect().x;
return {
windowWidth: document.documentElement.clientWidth,
windowHeight: document.documentElement.clientHeight,
pageWidth: Math.min(document.body.scrollWidth, contentWidth),
pageHeight: document.body.scrollHeight,
screenWidth: window.screen.width,
screenHeight: window.screen.height,
pageX: document.body.getBoundingClientRect().x,
pageY: document.body.getBoundingClientRect().y,
screenX: -window.screenX,
screenY: -window.screenY - (window.outerHeight-window.innerHeight),
}
}
// TEST
function show() {
console.log(sizes());
}
body { margin: 0 }
.box { width: 3000px; height: 4000px; background: red; }
<div class="box">
CAUTION: stackoverflow snippet gives wrong values for screenX-Y,
but if you copy this code to your page directly the values will be right<br>
<button onclick="show()" style="">CALC</button>
</div>
I test it on Chrome 83.0, Safari 13.1, Firefox 77.0 and Edge 83.0 on MacOs High Sierra
Graphical answer:
(............)
function wndsize(){
var w = 0;var h = 0;
//IE
if(!window.innerWidth){
if(!(document.documentElement.clientWidth == 0)){
//strict mode
w = document.documentElement.clientWidth;h = document.documentElement.clientHeight;
} else{
//quirks mode
w = document.body.clientWidth;h = document.body.clientHeight;
}
} else {
//w3c
w = window.innerWidth;h = window.innerHeight;
}
return {width:w,height:h};
}
function wndcent(){
var hWnd = (arguments[0] != null) ? arguments[0] : {width:0,height:0};
var _x = 0;var _y = 0;var offsetX = 0;var offsetY = 0;
//IE
if(!window.pageYOffset){
//strict mode
if(!(document.documentElement.scrollTop == 0)){offsetY = document.documentElement.scrollTop;offsetX = document.documentElement.scrollLeft;}
//quirks mode
else{offsetY = document.body.scrollTop;offsetX = document.body.scrollLeft;}}
//w3c
else{offsetX = window.pageXOffset;offsetY = window.pageYOffset;}_x = ((wndsize().width-hWnd.width)/2)+offsetX;_y = ((wndsize().height-hWnd.height)/2)+offsetY;
return{x:_x,y:_y};
}
var center = wndcent({width:350,height:350});
document.write(center.x+';<br>');
document.write(center.y+';<br>');
document.write('<DIV align="center" id="rich_ad" style="Z-INDEX: 10; left:'+center.x+'px;WIDTH: 350px; POSITION: absolute; TOP: '+center.y+'px; HEIGHT: 350px"><!--К сожалению, у Вас не установлен flash плеер.--></div>');
You can also get the WINDOW width and height, avoiding browser toolbars and other stuff. It is the real usable area in browser's window.
To do this, use:
window.innerWidth and window.innerHeight properties (see doc at w3schools).
In most cases it will be the best way, in example, to display a perfectly centred floating modal dialog. It allows you to calculate positions on window, no matter which resolution orientation or window size is using the browser.
To check height and width of your current loaded page of any website using "console" or after clicking "Inspect".
step 1: Click the right button of mouse and click on 'Inspect' and then click 'console'
step 2: Make sure that your browser screen should be not in 'maximize' mode. If the browser screen is in 'maximize' mode, you need to first click the maximize button (present either at right or left top corner) and un-maximize it.
step 3: Now, write the following after the greater than sign ('>') i.e.
> window.innerWidth
output : your present window width in px (say 749)
> window.innerHeight
output : your present window height in px (say 359)
Complete guide related to Screen sizes
JavaScript
For height:
document.body.clientHeight // Inner height of the HTML document body, including padding
// but not the horizontal scrollbar height, border, or margin
screen.height // Device screen height (i.e. all physically visible stuff)
screen.availHeight // Device screen height minus the operating system taskbar (if present)
window.innerHeight // The current document's viewport height, minus taskbars, etc.
window.outerHeight // Height the current window visibly takes up on screen
// (including taskbars, menus, etc.)
Note: When the window is maximized this will equal screen.availHeight
For width:
document.body.clientWidth // Full width of the HTML page as coded, minus the vertical scroll bar
screen.width // Device screen width (i.e. all physically visible stuff)
screen.availWidth // Device screen width, minus the operating system taskbar (if present)
window.innerWidth // The browser viewport width (including vertical scroll bar, includes padding but not border or margin)
window.outerWidth // The outer window width (including vertical scroll bar,
// toolbars, etc., includes padding and border but not margin)
Jquery
For height:
$(document).height() // Full height of the HTML page, including content you have to
// scroll to see
$(window).height() // The current document's viewport height, minus taskbars, etc.
$(window).innerHeight() // The current document's viewport height, minus taskbars, etc.
$(window).outerHeight() // The current document's viewport height, minus taskbars, etc.
For width:
$(document).width() // The browser viewport width, minus the vertical scroll bar
$(window).width() // The browser viewport width (minus the vertical scroll bar)
$(window).innerWidth() // The browser viewport width (minus the vertical scroll bar)
$(window).outerWidth() // The browser viewport width (minus the vertical scroll bar)
Reference: https://help.optimizely.com/Build_Campaigns_and_Experiments/Use_screen_measurements_to_design_for_responsive_breakpoints
With the introduction of globalThis in ES2020 you can use properties like.
For screen size:
globalThis.screen.availWidth
globalThis.screen.availHeight
For Window Size
globalThis.outerWidth
globalThis.outerHeight
For Offset:
globalThis.pageXOffset
globalThis.pageYOffset
...& so on.
alert("Screen Width: "+ globalThis.screen.availWidth +"\nScreen Height: "+ globalThis.screen.availHeight)
If you need a truly bulletproof solution for the document width and height (the pageWidth and pageHeight in the picture), you might want to consider using a plugin of mine, jQuery.documentSize.
It has just one purpose: to always return the correct document size, even in scenarios when jQuery and other methods fail. Despite its name, you don't necessarily have to use jQuery – it is written in vanilla Javascript and works without jQuery, too.
Usage:
var w = $.documentWidth(),
h = $.documentHeight();
for the global document. For other documents, e.g. in an embedded iframe you have access to, pass the document as a parameter:
var w = $.documentWidth( myIframe.contentDocument ),
h = $.documentHeight( myIframe.contentDocument );
Update: now for window dimensions, too
Ever since version 1.1.0, jQuery.documentSize also handles window dimensions.
That is necessary because
$( window ).height() is buggy in iOS, to the point of being useless
$( window ).width() and $( window ).height() are unreliable on mobile because they don't handle the effects of mobile zooming.
jQuery.documentSize provides $.windowWidth() and $.windowHeight(), which solve these issues. For more, please check out the documentation.
I wrote a small javascript bookmarklet you can use to display the size. You can easily add it to your browser and whenever you click it you will see the size in the right corner of your browser window.
Here you find information how to use a bookmarklet
https://en.wikipedia.org/wiki/Bookmarklet
Bookmarklet
javascript:(function(){!function(){var i,n,e;return n=function(){var n,e,t;return t="background-color:azure; padding:1rem; position:fixed; right: 0; z-index:9999; font-size: 1.2rem;",n=i('<div style="'+t+'"></div>'),e=function(){return'<p style="margin:0;">width: '+i(window).width()+" height: "+i(window).height()+"</p>"},n.html(e()),i("body").prepend(n),i(window).resize(function(){n.html(e())})},(i=window.jQuery)?(i=window.jQuery,n()):(e=document.createElement("script"),e.src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js",e.onload=n,document.body.appendChild(e))}()}).call(this);
Original Code
The original code is in coffee:
(->
addWindowSize = ()->
style = 'background-color:azure; padding:1rem; position:fixed; right: 0; z-index:9999; font-size: 1.2rem;'
$windowSize = $('<div style="' + style + '"></div>')
getWindowSize = ->
'<p style="margin:0;">width: ' + $(window).width() + ' height: ' + $(window).height() + '</p>'
$windowSize.html getWindowSize()
$('body').prepend $windowSize
$(window).resize ->
$windowSize.html getWindowSize()
return
if !($ = window.jQuery)
# typeof jQuery=='undefined' works too
script = document.createElement('script')
script.src = 'http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js'
script.onload = addWindowSize
document.body.appendChild script
else
$ = window.jQuery
addWindowSize()
)()
Basically the code is prepending a small div which updates when you resize your window.
In some cases related with responsive layout $(document).height() can return wrong data that displays view port height only.
For example when some div#wrapper has height:100%, that #wrapper can be stretched by some block inside it. But it's height still will be like viewport height. In such situation you might use
$('#wrapper').get(0).scrollHeight
That represents actual size of wrapper.
I developed a library for knowing the real viewport size for desktops and mobiles browsers, because viewport sizes are inconsistents across devices and cannot rely on all the answers of that post (according to all the research I made about this) : https://github.com/pyrsmk/W
Sometimes you need to see the width/height changes while resizing the window and inner content.
For that I've written a little script that adds a log box that dynamicly monitors all the resizing and almost immediatly updates.
It adds a valid HTML with fixed position and high z-index, but is small enough, so you can:
use it on an actual site
use it for testing mobile/responsive
views
Tested on: Chrome 40, IE11, but it is highly possible to work on other/older browsers too ... :)
function gebID(id){ return document.getElementById(id); }
function gebTN(tagName, parentEl){
if( typeof parentEl == "undefined" ) var parentEl = document;
return parentEl.getElementsByTagName(tagName);
}
function setStyleToTags(parentEl, tagName, styleString){
var tags = gebTN(tagName, parentEl);
for( var i = 0; i<tags.length; i++ ) tags[i].setAttribute('style', styleString);
}
function testSizes(){
gebID( 'screen.Width' ).innerHTML = screen.width;
gebID( 'screen.Height' ).innerHTML = screen.height;
gebID( 'window.Width' ).innerHTML = window.innerWidth;
gebID( 'window.Height' ).innerHTML = window.innerHeight;
gebID( 'documentElement.Width' ).innerHTML = document.documentElement.clientWidth;
gebID( 'documentElement.Height' ).innerHTML = document.documentElement.clientHeight;
gebID( 'body.Width' ).innerHTML = gebTN("body")[0].clientWidth;
gebID( 'body.Height' ).innerHTML = gebTN("body")[0].clientHeight;
}
var table = document.createElement('table');
table.innerHTML =
"<tr><th>SOURCE</th><th>WIDTH</th><th>x</th><th>HEIGHT</th></tr>"
+"<tr><td>screen</td><td id='screen.Width' /><td>x</td><td id='screen.Height' /></tr>"
+"<tr><td>window</td><td id='window.Width' /><td>x</td><td id='window.Height' /></tr>"
+"<tr><td>document<br>.documentElement</td><td id='documentElement.Width' /><td>x</td><td id='documentElement.Height' /></tr>"
+"<tr><td>document.body</td><td id='body.Width' /><td>x</td><td id='body.Height' /></tr>"
;
gebTN("body")[0].appendChild( table );
table.setAttribute(
'style',
"border: 2px solid black !important; position: fixed !important;"
+"left: 50% !important; top: 0px !important; padding:10px !important;"
+"width: 150px !important; font-size:18px; !important"
+"white-space: pre !important; font-family: monospace !important;"
+"z-index: 9999 !important;background: white !important;"
);
setStyleToTags(table, "td", "color: black !important; border: none !important; padding: 5px !important; text-align:center !important;");
setStyleToTags(table, "th", "color: black !important; border: none !important; padding: 5px !important; text-align:center !important;");
table.style.setProperty( 'margin-left', '-'+( table.clientWidth / 2 )+'px' );
setInterval( testSizes, 200 );
EDIT: Now styles are applied only to logger table element - not to all tables - also this is a jQuery-free solution :)
You can use the Screen object to get this.
The following is an example of what it would return:
Screen {
availWidth: 1920,
availHeight: 1040,
width: 1920,
height: 1080,
colorDepth: 24,
pixelDepth: 24,
top: 414,
left: 1920,
availTop: 414,
availLeft: 1920
}
To get your screenWidth variable, just use screen.width, same with screenHeight, you would just use screen.height.
To get your window width and height, it would be screen.availWidth or screen.availHeight respectively.
For the pageX and pageY variables, use window.screenX or Y. Note that this is from the VERY LEFT/TOP OF YOUR LEFT/TOP-est SCREEN. So if you have two screens of width 1920 then a window 500px from the left of the right screen would have an X value of 2420 (1920+500). screen.width/height, however, display the CURRENT screen's width or height.
To get the width and height of your page, use jQuery's $(window).height() or $(window).width().
Again using jQuery, use $("html").offset().top and $("html").offset().left for your pageX and pageY values.
here is my solution!
// innerWidth
const screen_viewport_inner = () => {
let w = window,
i = `inner`;
if (!(`innerWidth` in window)) {
i = `client`;
w = document.documentElement || document.body;
}
return {
width: w[`${i}Width`],
height: w[`${i}Height`]
}
};
// outerWidth
const screen_viewport_outer = () => {
let w = window,
o = `outer`;
if (!(`outerWidth` in window)) {
o = `client`;
w = document.documentElement || document.body;
}
return {
width: w[`${o}Width`],
height: w[`${o}Height`]
}
};
// style
const console_color = `
color: rgba(0,255,0,0.7);
font-size: 1.5rem;
border: 1px solid red;
`;
// testing
const test = () => {
let i_obj = screen_viewport_inner();
console.log(`%c screen_viewport_inner = \n`, console_color, JSON.stringify(i_obj, null, 4));
let o_obj = screen_viewport_outer();
console.log(`%c screen_viewport_outer = \n`, console_color, JSON.stringify(o_obj, null, 4));
};
// IIFE
(() => {
test();
})();
This how I managed to get the screen width in React JS Project:
If width is equal to 1680 then return 570 else return 200
var screenWidth = window.screen.availWidth;
<Label style={{ width: screenWidth == "1680" ? 570 : 200, color: "transparent" }}>a </Label>
Screen.availWidth
I want to show a random background image, that starts a loop of random other background images after five seconds.
First I create an array for my background-images:
<?php
$bg = array('bg1.jpg', 'bg2.jpg', 'bg3.jpg', 'bg4.jpg', 'bg5.jpg', 'bg6.jpg', 'bg7.jpg', 'bg8.jpg', 'bg9.jpg', 'bg10.jpg', 'bg11.jpg');
$i = rand(0, count($bg)-1);
$selectedBg = "$bg[$i]";
?>
Second I append a random image to my body:
<style>
#media screen and (min-width: 600px) {
body {
background-image: url(<?php bloginfo('template_url'); ?>/images/backgrounds/<?php echo $selectedBg; ?>);
}
}
</style>
Now I would like to use php or jQuery to select another random image and change the background. How can I achieve this?
If you want to loop your background image every 5 seconds (without having the user reloading the page), you can't do it on PHP, it must be done client side (Javascript).
PHP is a tool to generate the HTML code that will be rendered on the user's browser, but it can't change the page afterward, which is what javascript is made for.
<script type="text/javascript">
// declare list of backgrounds
var images = ['bg-01.jpg', 'bg-02.jpg', 'bg-03.jpg', 'bg-04.jpg', 'bg-05.jpg', 'bg-06.jpg', 'bg-07.jpg'];
// declare function that changes the background
function setRandomBackground() {
// choose random background
var randomBackground = images[Math.floor(Math.random() * images.length)];
// set background with jQuery
$('body').css('background-image', 'url("images/' + randomBackground + '")');
}
// declare function that sets the initial background, and starts the loop.
function startLoop() {
// Set initial background.
setRandomBackground();
// Tell browser to execute the setRandomBackground every 5 seconds.
setInterval(setRandomBackground, 5 * 1000);
}
// One the page has finished loading, execute the startLoop function
$(document).ready(startLoop);
</script>
try using less and js like:
var timeout = 1000;
var action = function() {
var random = Math.floor(Math.random() * 6) + 1 ;
if(random.length<=1){random = '0'+random;}
var wynikLos = 'path/to/file/bg-'+random+'.jpg';
less.modifyVars({
'#img': wynikLos
});
setTimeout(action, timeout);
};
action();
In Less:
body{background-image:#img;}
http://lesscss.org/
p.s.
not tested
I searched, but did not find the answer to this.
I have a website that displays hundreds of images in thumbnail format. I'm currently using php to display all of the images in thumbnail, then when the thumbnail is clicked upon to display the images in full-size.
What I would like to do is be able to click on a thumbnail and see the resulting full-size image, then at that point be able to scroll both back and forth through the full-size images without going back to the thumbnails.
As an added feature, when viewing the thumbnails, I would like to only load the ones that are currently displayed on the client page...ie - if the client screen resolution supports 20, then load only 20 and wait to load the rest on the client until the user scrolls down. The primary client in this use case is an iphone.
Thanks in advance!
you need to use a slider jquery plugin
Like
Jquery Light Box Plugin
When you click on the image, it should point to a new PHP file containing the full size image, or even better, load it in a new <div> with php you can get the client resolution with other tools
You actual have two seperate questions. One is to show the thumbs fullsize and be able to click to the next image. Almost every plugin to show images has that options. Personally i use fancybox, but pick anyone you like. To enable the next/prev buttons you need to group the images useing the rel tag.
Now to load the images per page, similar to google does it, you need to load it all in by javascript. Below is a setup of how you could do it. This is untested, as I did not have an image gallery at hand.
In the code below I load all images into the array at once, which is not perfect when you have a lot of images (like 1000+). In that case your better of using AJAX to load a new page. But if you have a smaller amount of images, this will be faster.
<script>
//simple JS class to store thumn and fullimage url
function MyImage(thumbnail, fullimage, imgtitle) {
this.thumb = thumbnail;
this.full = fullimage;
this.title = imgtitle;
}
//array that holds all the images
var imagesArray = new Array();
var currentImage = 0;
<?php
//use php code to loop trough your images and store them in the array
//query code to fetch images
//each row like $row['thumb'] and $row['full'] and $row['title'];
while ($row = mysqli_fetch_assoc($result))
{
echo "imagesArray.push(new MyImage('".$row['thumb']."', '".$row['full']."', '".$row['title']."'));";
}
?>
//the thumb width is the width of the full container incl. padding
//In this case I want to use 50x50 images and have 10px on the right and at the bottom. Which results in 60x60
var thumbWidth = 60;
var thumbHeight = 60;
var screenWidth = $('body').width();
var screenHeight = $('body').height();
var maxImagesPerRow = Math.round(screenWidth / thumbWidth);
var maxImagesPerCol = Math.round(screenHeight / thumbHeight);
var totalImagesPerPage = maxImagesPerRow * maxImagesPerCol;
//function to load a new page
//assuming you use jquery
function loadNextPage() {
var start = currentImage;
var end = currentImage + totalImagesPerPage;
if (end >= imagesArray.length) {
end = imagesArray.length - 1;
}
if (end<=start)
return; //last images loaded
$container = $('#thumbnailContainer'); //save to var for speed
$page = $('<div></div>'); //use a new container, not on stage, to prevent the dom for reloading everything on each iteration of the loop
for (start;start<=end;start++) {
//add a new thumbnail to the page
$page.append('<div style="margin:0;padding:0 10px 10px 0;"><a class="fancybox" rel="mygallery" href="'+imagesArray[start].full+'" title="'+imagesArray[start].title+'"><img src="'+imagesArray[start].thumb+'" alt="" /></a></div>');
}
currentImage = start;
//when all images are added to the page, add the page to the container.
$container.append($page);
}
$(function() {
//when loading ready, load the first page
loadNextPage();
});
//function to check if we need to load a new page
function checkScroll() {
var fromTop = $('body').scrollTop();
//page with a 1-based index
var page = 1 + Math.round(fromTop / screenHeight);
var loadedImages = page*totalImagesPerPage;
if (loadedImages==currentImage) {
//we are scrolling the last loaded page
//load a new page
loadNextPage();
}
}
window.onscroll = checkScroll;
</script>
<body>
<div id='thumbnailContainer'></div>
</body>
I've been looking through SO and Google trying to find a simple way to overlay a busy icon on an existing image. While applying filters and effects to images I'd like to let the user know it's being processed by showing a busy icon on top of the current image.
Do I need to create some sort of overlay image that I show at the start of the process and hide after it's complete using jquery?
Just looking for some ideas from people that might have done this already.
As #Diodeus said, ideally you'd have a wrapper around the image so the issue of positioning the loading image is trivial relative to the image.
If a wrapper is not an option (i.e. you're working with existing, unchangeable mark-up, or wrappers would break your CSS en-masse, it's not the end of the world. You can just plonk the icon over the image, taking advantage of the fact that jQuery makes it easy to get an element's coordinates relative to the body, not only its relative parent/ancestor.
HTML (put this directly in the body, not nested)
<img src='loading.png' id='loading' />
CSS
#loading { position: absolute; display: none; /* other styles, BG img etc */ }
JavaScript (el is the page element concerned)
var loading_img = $('#loading');
function func_called_when_stuff_happening(el) {
var el_coords = $(el).offset();
loading_img.show().css({
left: el_coords.left + (($(el).width() / 2) - (loading_img.width() / 2)),
top: el_coords.top + (($(el).height() / 2) - (loading_img.height() / 2)),
});
}
That will put the icon in the middle of the element.
Generally you absolutely-position an image over the content, in this case your image. You should use a wrapping element like this to get the positioning to work:
<div class="hasLoader">
<img src="...your image..." />
<img class="loading" src="...your LOADING image..." />
</div>
CSS:
.hasLoader {
position:relative;
}
.loading {
position:absolute;
top:0;
left:0;
}
If you need a good loading image, AjaxLoad has a good generator.
Look at this : http://jsfiddle.net/dystroy/M3AnJ/
After 2 seconds an overlay appears, exactly covering the image, with a spinner at center.
Here's how I do it :
javascript :
setTimeout(function(){
var o = $('<div id=overlay></div>');
o.prependTo('body');
var img = $('#test');
var pos = img.offset();
o.css({left:pos.left, top:pos.top, width:img.width(), height:img.height()});
}, 2000);
CSS :
#overlay {
position: fixed;
background-color:rgba(100,100,100,0.5);
background-image: url("http://dystroy.org/loading.gif");
background-position:center;
background-repeat:no-repeat;
};
I would create a transparent GIF and absolutely position it over the target image w/ JavaScript:
var targetImage = document.getElementById("targImgID");
var ovrlay = document.createElement("IMG");
ovrlay.src = "\my\image\url\overlay.gif";
ovrlay.style.position = "absolute";
ovrlay.style.left = targetImage.offsetLeft + "px";
ovrlay.style.top = targetImage.offsetTop + "px";
document.body.appendChild(ovrlay);
This is prototype code that hasn't been debugged, and leaves out some stuff like getting the absolute position of the target image, centering and setting a z-index for the overlay, and removing the thing w/ removeChild, but it's where I'd start.
I'm looking for ideas ...brainstorming a new project for a client ....I have an image ...300px x 300px ...I need to display the image one random pixel at a time until the entire image is revealed.
Basically, at certain intervals, a pixel is revealed and remains revealed while other pixels are still blank. At each interval, another pixel at random is revealed and remains revealed to join the other revealed pixels. Eventually, all the pixels will be revealed.
Any suggestions on how to make that happen?
I could make numerous copies of the image and manually reveal one random pixel, but surely it can be done programatically :)
Oh, and it cannot be any form of flash.
EDIT: I realize I mis-interpreted what you needed to do, but I thought this was cool anyway and could be applied to your problem...
See working demo of the following →
I threw this together in jQuery. I made each pixel actually a 3x3 box instead because otherwise it would take way too long to process. Seems to work pretty well for something on this in client side, though I haven't tested IE yet.
<div id="w">
<img id="i" src="yourImage.jpg" width="300" height="300" />
</div>
$('#w').css({
width: $('#i').width(),
height: $('#i').height()
});
var htmlFrag = '',
id, ids = [],
removePix = function () {
if (ids.length) {
var rand = Math.floor(Math.random()*ids.length);
$('#'+ids[rand]).fadeOut(function(){
$(this).remove();
});
ids = ids.slice(0, rand).concat(ids.slice(rand+1));
setTimeout(removePix, 1);
}
};
for (var i = 0, len = $('#i').height(); i < len; i += 3) {
for (var j = 0, len = $('#i').width(); j < len; j += 3) {
id = 'pix'+j+'-'+i;
ids.push(id);
htmlFrag += '<div id="'+id+'" class="pix" ' +
'style="width:3px;height:3px;position:absolute;' +
'left:'+j+'px;top:'+i+'px;"></div>';
}
}
$('#w').html($('#w').html() + htmlFrag);
removePix();
See working example →
Load the image file into an image resource (imagecreatefrompng, imagecreatefromgif, etc).
Decide what pixels to show, using rand() or however you want to choose them.
Loop over every pixel in the image, and if it's not one you chose to show, color it gray with imagesetpixel.