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use JavaScript to toggle between different "crops" of a single large image

So I have been reading up on dozens upon dozens of Javascript zoom components, but none of them do what I am looking for, so I'm curious where to find such a component (if one exists) or how to code it myself.
The goal is to download a single large (1000x1000) image to the browser. Then within the browser, the image would have three presentation states within the same element container that the user can toggle between by clicking on some page element.
State 1 (default): See the entire image, but scaled down to fit within a 500x500 container (i.e. shrunk, but not cropped). For example (not to scale, but for comparison with other states):
State 2: See the middle 50%, centered, in the same container (i.e. actual size, and cropped). For example:
State 3: See the middle 25%, centered, in the same container (i.e. enlarged, and cropped quite a bit). For example:
And I would put the script that toggles between these three states in the click of some page element, such as a button.
Can any one offer a link to a component that does this, or suggestions on how the method that might accomplish it?
Thanks for any help!

I will go down on leveraging some CSS here.
For first case:
1) create a DIV which is 500x500, and set the background image to the file. Make sure you set background-size:contain property as well on the div.
2) For the second case I will remove the background-size:contain
3) The third case I will set the `background-size:200%;'
JSFiddle

If what you've described is really all you want to do it can be easily achieved with some CSS and a few lines of javascript:
var container = document.querySelector('.image-zoom'),
zoomBtn = document.getElementById('zoom-it'),
i = 0;
function clickHandler() {
if (i === 0) {
container.classList.add('zoom-2x');
i++;
} else if (i === 1) {
container.classList.add('zoom-4x');
i++;
} else {
container.classList.remove('zoom-2x');
container.classList.remove('zoom-4x');
i = 0;
}
}
zoomBtn.addEventListener('click', clickHandler);
.image-container, .image-zoom {
width: 250px;
height: 250px;
}
.image-container {
overflow: hidden;
}
.image-zoom.zoom-2x {
transform: scale(2);
}
.image-zoom.zoom-4x {
transform: scale(4);
}
<div class="image-container">
<div class="image-zoom" style="background-image:url(http://lorempixel.com/250/250)">
</div>
</div>
<button id="zoom-it">zoom image</button>
This assumes you know the dimensions of the image, which if you're using a CMS you can likely easily get and insert them inline on the .image-zoom and .image-containerelements.
jsFiddle
EDIT
jsFiddle 2
Modified the jsfiddle to be closer to what your question asked (initial state of the image is contained within the square and not cropped any amount.)

How to force a drop-down to move down on IE 11?

I have the following drop-down :
<select>
<option></option>
<option>Closed</option>
<option>Open</option>
</select>
with the associated style:
select {
font-family: Cursive;
width:200px;
position: relative;
z-index: 100;
padding-right: 25px;
}
My problem is that the drop-down is moving upward on IE 11:
Where as on chrome it is working fine.
Any idea ?

Like mentioned in the comments, select menus are very browser specific and hard to style. Some even send the options into the twilight zone where they are seemingly not even a part of the window and any events will return null. It might not be worth trying to get this to look the same across browsers, also because of the mobile implementations, but I happened to be making something like this for no apparent reason. As it coincides with your question I might as well post it.
It's not the prettiest thing when it comes to HTML and CSS because it requires four additional elements - one wrapper (commonly used for styling select boxes with overflow hidden but I took a slightly different approach because I thought it looked better) and three absolutely placed elements. One is a styled button, another will hide the scrollbar that appears and the third is a minor hack.
Most important thing is that the user will not be able to click the select menu itself. When this happens, most is lost because after that it's limbo. For that the third element will be used. It will be put on top of the select box. Then when it's clicked, instead of directly opening the menu it will be faked by changing the size of the select element. The div covering the right side also serves another purpose. It's initially placed at the bottom and by getting it's offset we'll know the height of the box. This will be used to resize the button and set the correct size for the overlaying div.
Looks to be behaving quite predicatbly on all major Windows desktop browsers. For the mobile implications this script uses a touch support feature test and reverts to normal layout if that is the case. Could probably be tweaked (with a screen size check) to not exclude trackpad users.
Demo
Not too much relevant CSS. But important to style body background the same as the bar on the right. Transparency is used so the actual menu isn't visible before the image for the button loads.
$(function() {
var hub = $('#box'), list = $('select'),
impel = $('#open'), commit = $('#mark'), tract = $('#refer'),
zenith = tract.position().top,
extent = list.children().length, active;
if (touch()) {
impel.add(commit).add(tract).remove();
hub.fadeTo(0,1);
return;
}
impel.add(commit).height(zenith);
tract.addClass('bar');
hub.fadeTo(0,1).on('mouseup click', function(e) {
e.stopPropagation();
});
commit.mouseup(function() {
flip();
show();
active = true;
});
list.add(impel).click(function() {
flip();
active = !active;
if (active) show();
else hide();
});
$(window).click(function() {
if (active) {
flip();
hide();
active = false;
}
});
function show() {list.attr('size', extent)}
function hide() {list.removeAttr('size')}
function flip() {commit.toggle()}
function touch() {
return 'ontouchstart' in window
|| navigator.maxTouchPoints > 0
|| navigator.msMaxTouchPoints > 0;
}
});

Successive background-color animation request failing with jQuery 1.6.1

I'm trying to "flash" an input box by changing the background color briefly and then reverting back to the original bg color using jquery to indicate an error and grab the users attention.
Here's a fiddle to demonstrate what I'm trying to do.
I have to use jquery version 1.6.1. In the fiddle demo, it's using 1.6.4 and the color of the input box never changes at all. Actually, it doesn't work even with 1.11. In my local tests with my code, the input box changes red with the first animation call, but fails to do anything for the second animation call (to revert the bg color back to white). It just stays red.
I'm using very similar code to do the same thing in another site, except using jquery 1.11 and it works fine.
Is this just a compatibility issue? Is there some way I can make this work properly with version 1.6.1 ?
Here's the code:
function flashInputBox(id) {
var input = $('#'+id);
input.focus();
input.stop(true).animate({'background-color': '#EC8686'}, 350, function() {
input.stop(true).animate({'background-color': '#FFFFFF'}, 1000);
});
}
I forgot to mention that I'm using jQuery UI v1.8.18
The problem is properly replicated now in this fiddle (same code, just added jQuery UI 1.8.18).

Do you need to use jQuery? If not, this is way easier in CSS using key frames. If it is, skip my CSS explanation.
CSS
This still uses jQuery, but it gives the animation job to CSS, making your code more legible. I set this up in jsFiddle if you want to check it out: jsFiddle Example
First, setup a keyframe:
#keyframes pulse{
from {
background: #ec8686;
}
to {
background: #ffffff;
}
}
#-webkit-keyframes pulse{
from {
background: #ffffff;
}
to {
background: #ec8686;
}
}
and attach it to your existing input:
#my-input{
...
-webkit-animation: pulse 5s infinite;
-webkit-animation-play-state: paused;
...
}
Then the jQuery becomes a matter of letting the animation play for a few seconds:
function doIt() {
$("#my-input").css("-webkit-animation-play-state", "running");
setTimeout(function() {
$("#my-input").css("-webkit-animation-play-state", "paused");
}, 5000);
}
Also, you don't even need the jQuery to trigger the animation. The button click can directly trigger a CSS animation, however I figured you have some sort of code to check what's in the box for accuracy, so that why I kept your old function.
Note that this keyframe ends suddenly, so you can totally have a 0%, 50%, 100% keyframe instead.
Now for the raw jQuery way:
jQuery
For your jQuery, its much easier just to either specify your input directly (aka $("#my-input-name")), or if its just one input, I got it working just by using the following code instead:
function doIt() {
...
input.stop().animate({'background-color': '#EC8686'}, 350, function() {
// just say input here //
input.animate({'background-color': '#FFFFFF'}, 1000);
});
}

Colors aren't numeric values, so they can't be animated. From the jQuery documentation for .animate, emphasis mine:
All animated properties should be animated to a single numeric value, except as noted below; most properties that are non-numeric cannot be animated using basic jQuery functionality (For example, width, height, or left can be animated but background-color cannot be, unless the jQuery.Color() plugin is used). Property values are treated as a number of pixels unless otherwise specified. The units em and % can be specified where applicable.
If you don't want to (or can't) use the jQuery.Color plugin, you'll need to animate the color "manually", e.g. by setting an interval and changing the color at each step.

how to remove hover on click

I'm working on a jQuery game. I have a 4 divs in a 2x2 design. The player needs to pick 1 option and verify with another button. The thing is, I have a hover effect adding a class which changes the background with a low opacity, and a click effect setting the background with a higher opacity. For divs 2, 3 and 4 it works fine - I hover and background changes color with opacity 0.3 and when I move the mouse out, it goes back to white. And when I click it, it changes the background to 0.4 and the hover doesn't affect them anymore. However, this is not working for the first div: the div changes background color on hover, but when I click it ,it keeps the hover color, and when I mouse out I see the click color, and every time I hover it changes the hover color again and so on.
Why is it happening only on div 1?
Code:
//hover effects
$(".respuesta1,.respuesta2,.respuesta3,.respuesta4").hover(
function () {
$(this).addClass("respuestahover");
},
function () {
$(this).removeClass("respuestahover");
});
//on click function for div1
$(".respuesta1").on("click", function () {
//if it hasnt been clicked, toogle class and change var to true
if (prendido1 == false) {
$(this).toggleClass("respuesta1b");
prendido1 = true;
//if any of the other divs are clicked by the time you are clicking unclicked 1, turn them off
if (prendido2 == true) {
$(".respuesta2").toggleClass("respuesta2b");
prendido2 = false;
}
if (prendido3 == true) {
$(".respuesta3").toggleClass("respuesta3b");
prendido3 = false;
}
if (prendido4 == true) {
$(".respuesta4").toggleClass("respuesta4b");
prendido4 = false;
}
//if is already clicked, turn off and change var to false
} else {
$(this).toggleClass("respuesta1b");
prendido1 = false;
}
});
The last part is repeated for every div "respuesta2", "respuesta3", etc..
Any idea?
EDIT
I was trying to clean up the code to make a jsFiddle and I think I got it to work:
http://jsfiddle.net/bqySN/2/
I'll just leave the code there if anyone is interested, be aware the code is unpolished and it need more generalisations.
EDIT 2
After some testing I actually found the problem:
if I alter the order of my css clases the app goes crazy:
This one is correct, with hover first
.respuestahover{
background-color:#f00;
opacity:0.2;
}
.respuestab{
background-color:#f00;
opacity:0.5;
}
This one is incorrect, hover second:
.respuestab{
background-color:#f00;
opacity:0.5;
}
.respuestahover{
background-color:#f00;
opacity:0.2;
}
I'm not really sure why it is behaving like that, but I'm glad I figure it out.

You are adding a class on hover... why would you do that via javascript if you can just use the :hover state from css? For example:
#foo .element p { color: red; }
#foo .element:hover p { color: blue; }
EDIT:
Sorry, I miss the original question.
If you want to remove the hover effect after clicking, you have lot of different ways to do this. You can remove the class defined with the hover via css, or if you want a jQuery solution you can use mouseenter/mouseleave with .on and then unbind with off.
See the following fiddle example.

You should simplify the bindings to just target them a little more generically, then remove the hover classes on all of them:
$(".respuesta").on("click", function (index) {
$(this).removeClass("hover");
// do other things
});
You can also use the index to find which number they are if they're in a list.
if you want the hover to not override the click, give the click an active class and tell the hovers to work on everything but them:
$('.respuesta:not(.active)').hover(function() {
// do something
}

Toggle Galleria Full Screen Mode

I am wondering if anyone knows how to toggle between full screen and normal mode in Galleria
The only way I can think of is to switch between themes : default, and Fullscreen theme (which i bought from there)
If you know an even better way, I would appreciate your help.

I’m just going to add to #Ohgodwhy’s answer:
The best way to get the Galleria instance and use the API is to use the Galleria.ready function:
Galleria.ready(function() {
var gallery = this; // galleria is ready and the gallery is assigned
$('#fullscreen').click(function() {
gallery.toggleFullscreen(); // toggles the fullscreen
});
});
Or, you can access the instance via the $.data object if you know that the gallery is initialized:
$('#fullscreen').click(function() {
$('#galleria').data('galleria').toggleFullscreen(); // toggles the fullscreen
});
I am assuming you have a link/button with the ID 'fullscreen' and the gallery is at ID 'galleria'.

I'm using:
lightbox: true,
before Galleria.run(). This allows you to display fullscreen Overlay after clicking on image in the gallery.

This should work:
JS
Galleria.loadTheme('http://aino.github.com/galleria/demos/categories/themes/classic/galleria.classic.min.js');
$('#galleria').galleria();
Galleria.ready(function() {
var gallery = this;
this.addElement('fscr');
this.appendChild('stage','fscr');
var fscr = this.$('fscr')
.click(function() {
gallery.toggleFullscreen();
});
this.addIdleState(this.get('fscr'), { opacity:0 });
});
CSS
.galleria-fscr{
width:20px;
height:20px;
position:absolute;
bottom:0px;
right:10px;
background:url('fullscreen.png');
z-index:4;
cursor: pointer;
opacity: .3;
}
.galleria-fscr:hover{
opacity:1;
}
Where fullscreen.png is an appropriate image of your choice.

The approach from Richard is working very well.
You could also do it by extending Galleria with-out the ready function:
JS
Galleria.run('.galleria', {
// configure
autoplay: true,
lightbox: true,
idleMode: true,
// extend theme
extend: function() {
var gallery = this; // "this" is the gallery instance
//fullscreen button
this.addElement('fscr');
this.appendChild('stage','fscr');
var fscr = this.$('fscr').click(function() {
gallery.toggleFullscreen();
});
// this.addIdleState(this.get('fscr'), { opacity:0 });
}
});`
And if you'd like to use a fontAwesome icon for the maximize icon you can implement it as following (other CSS styles see Richard's post):
CSS
.galleria-fscr:before {
content: "\f065"; /* char code for fa-expand */
position: absolute;
font-family: FontAwesome;
color: #fff;
}
(keep in mind to include the style sheet of fontAwesome with <link rel="stylesheet" href="css/font-awesome.min.css">)
I'm still having one problem with the maximize button. If I'm hovering over it, it doesn't get white and stays gray. Maybe something with the IDLE state is wrong, but I haven't found a solution yet. (If I remove the code line with this.addIdleState(...) the hovering works. I need to do more tests here.)
I'd also like to change the icon from maximize to the minimize icon once the screen is on fullscreen, but I don't know how to do that yet. That's also on my todo list.
Update 07.02.2014
I figured out how to solve these two issues:
For the "IDLE state" issue - I've removed the IDLE state. Because I don't care if these controls are permanently there and now hovering works as expected. Maybe I check another solution later.
To change an icon on click you can do it with CSS and jQuery:
Add an overriding CSS rule below the first before filter of the maximize icon in your CSS e.g.:
.galleria-fscr.minimize:before{
content: "\f066";
}
Add these JS line after gallery.toggleFullscreen() - that toggles the icon with every click between the normal before style and the minimize before style:
$(".galleria-fscr").toggleClass("minimize");
This works also for a play / resume button (rest of the code is the simillar to the fullscreen code):
JS
...
gallery.playToggle();
$('.galleria-pauseResumeBtn').toggleClass("resume");

From the Galleria documentation.
.enterFullscreen( [callback] )
This will set the gallery in fullscreen mode. It will temporary manipulate some document styles and blow up the gallery to cover the browser screen. Note that it will only fill the browser window, not the client screen (javascript can’t do that).
.toggleFullscreen( [callback] )
Toggles fullscreen mode.
If you need any further explanation of the use of these, please don't hesitate to ask.