I'm using jQuery.kinetic to allow a div to be scrolled within its parent div by dragging the mouse, just like the demo on the author's site
I want to add a button, which upon clicking it, moves the jQuery.kinetic activated div to a certain position, however I could not find how to do this. I know the scrollLeft and scrollRight methods can be called to change the position, exactly as I want:
$("container-selector").kinetic("scrollLeft", 50);
$("container-selector").kinetic("scrollTop", 480);
However I wish the change in positions to be animated, not immediate like how the code above does it.
Would anybody know how to smoothly move the draggable div to a specified position upon the clicking of a button, and have this animated? Thanks!
From the demo page HERE
$('#yourButtonIdOrClass').click(function() {
$('.container-selector').kinetic('start', { velocity: -10 }); // code to move your container
});
From the Doc's
Start movement in the scroll container at a particular velocity.
This velocity will not slow until the end method is called.
So you need to call the end() method to stop the div from scrolling either to the end of the right hand side or end of the left hand side, you might want to use the moved event and check how much the container has moved something like the below:
moved : function() {
if() // check moved position {
$('.container-selector').kinetic('end');
}
}
The above code will go inside the initialization of the plugin.
NOTE:: you can use the dev tools to check the event listeners attached to the left or right buttons.
I'm trying to create a small image that follows the mouse around but only exists inside a specific area. I'm using javascript/jquery to create the image when the mouse enters the area and remove it when the mouse leaves.
The problem is, if I create the "follower" inside the area div, the image seems to be considered part of it's parent for determining mouse state, and thus it continues to exist even after the mouse is outside the area.
(If I move the mouse fast enough the cursor will escape and the follower disapears.)
Here is the code I'm using:
$("#area").mouseenter(function() {
$("#area").append("<img id='follower' src='follower.png'/>");
});
$("#area").mousemove(function(event){
$("#follower").css("top",event.pageY-35);
$("#follower").css("left",event.pageX-35);
});
$("#area").mouseleave(function() {
$("#follower").remove();
});
JSFiddle: http://jsfiddle.net/cgWdF/186/
I have also attempted creating the "follower" inside a separate div, which works but results in a weird flickering of the image, as seen here: http://jsfiddle.net/cgWdF/187/
Any help, with this, would be appreciated. It doesn't matter whether the follower is created inside the area div, or not, as long as the flickering affect isn't seen. Also, I'd like to keep the code as compact as possible, but I'll take what I can get.
This occurs because the element on which you mouseleave is not the one on which you think it happens. In fact, your sprite is triggering the event instead because your pointer is over it at that time.
To prevent that from happening, you can force the page to cancel all pointer events on your sprite. By doing that, #area will trigger your pointer events as intended. The css rule pointer-events might be helpful for this.
CSS
#follower {
position: absolute;
height: 80px;
pointer-events: none;
}
There are probably better ways to deal with that but it's the most simple I can come up with for now.
Hope this helps!
See FIDDLE.
I have a div that has background:transparent, along with border. Underneath this div, I have more elements.
Currently, I'm able to click the underlying elements when I click outside of the overlay div. However, I'm unable to click the underlying elements when clicking directly on the overlay div.
I want to be able to click through this div so that I can click on the underlying elements.
Yes, you CAN do this.
Using pointer-events: none along with CSS conditional statements for IE11 (does not work in IE10 or below), you can get a cross browser compatible solution for this problem.
Using AlphaImageLoader, you can even put transparent .PNG/.GIFs in the overlay div and have clicks flow through to elements underneath.
CSS:
pointer-events: none;
background: url('your_transparent.png');
IE11 conditional:
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='your_transparent.png', sizingMethod='scale');
background: none !important;
Here is a basic example page with all the code.
Yes, you CAN force overlapping layers to pass through (ignore) click events.
PLUS you CAN have specific children excluded from this behavior...
You can do this, using pointer-events
pointer-events influences the reaction to click-, tap-, scroll- und hover events.
In a layer that should ignore / pass-through mentioned events you set
pointer-events: none;
Children of that unresponsive layer that need to react mouse / tap events again need:
pointer-events: auto;
That second part is very helpful if you work with multiple overlapping div layers (probably some parents being transparent), where you need to be able to click on child elements and only that child elements.
Example usage:
.parent {
pointer-events:none;
}
.child {
pointer-events:auto;
}
<div class="parent">
I'm unresponsive
I'm clickable again, wohoo !
</div>
Allowing the user to click through a div to the underlying element depends on the browser. All modern browsers, including Firefox, Chrome, Safari, and Opera, understand pointer-events:none.
For IE, it depends on the background. If the background is transparent, clickthrough works without you needing to do anything. On the other hand, for something like background:white; opacity:0; filter:Alpha(opacity=0);, IE needs manual event forwarding.
See a JSFiddle test and CanIUse pointer events.
I'm adding this answer because I didn’t see it here in full. I was able to do this using elementFromPoint. So basically:
attach a click to the div you want to be clicked through
hide it
determine what element the pointer is on
fire the click on the element there.
var range-selector= $("")
.css("position", "absolute").addClass("range-selector")
.appendTo("")
.click(function(e) {
_range-selector.hide();
$(document.elementFromPoint(e.clientX,e.clientY)).trigger("click");
});
In my case the overlaying div is absolutely positioned—I am not sure if this makes a difference. This works on IE8/9, Safari Chrome and Firefox at least.
Hide overlaying the element
Determine cursor coordinates
Get element on those coordinates
Trigger click on element
Show overlaying element again
$('#elementontop').click(e => {
$('#elementontop').hide();
$(document.elementFromPoint(e.clientX, e.clientY)).trigger("click");
$('#elementontop').show();
});
I needed to do this and decided to take this route:
$('.overlay').click(function(e){
var left = $(window).scrollLeft();
var top = $(window).scrollTop();
//hide the overlay for now so the document can find the underlying elements
$(this).css('display','none');
//use the current scroll position to deduct from the click position
$(document.elementFromPoint(e.pageX-left, e.pageY-top)).click();
//show the overlay again
$(this).css('display','block');
});
I currently work with canvas speech balloons. But because the balloon with the pointer is wrapped in a div, some links under it aren't click able anymore. I cant use extjs in this case.
See basic example for my speech balloon tutorial requires HTML5
So I decided to collect all link coordinates from inside the balloons in an array.
var clickarray=[];
function getcoo(thatdiv){
thatdiv.find(".link").each(function(){
var offset=$(this).offset();
clickarray.unshift([(offset.left),
(offset.top),
(offset.left+$(this).width()),
(offset.top+$(this).height()),
($(this).attr('name')),
1]);
});
}
I call this function on each (new) balloon. It grabs the coordinates of the left/top and right/down corners of a link.class - additionally the name attribute for what to do if someone clicks in that coordinates and I loved to set a 1 which means that it wasn't clicked jet. And unshift this array to the clickarray. You could use push too.
To work with that array:
$("body").click(function(event){
event.preventDefault();//if it is a a-tag
var x=event.pageX;
var y=event.pageY;
var job="";
for(var i in clickarray){
if(x>=clickarray[i][0] && x<=clickarray[i][2] && y>=clickarray[i][1] && y<=clickarray[i][3] && clickarray[i][5]==1){
job=clickarray[i][4];
clickarray[i][5]=0;//set to allready clicked
break;
}
}
if(job.length>0){
// --do some thing with the job --
}
});
This function proofs the coordinates of a body click event or whether it was already clicked and returns the name attribute. I think it is not necessary to go deeper, but you see it is not that complicate.
Hope in was enlish...
Another idea to try (situationally) would be to:
Put the content you want in a div;
Put the non-clicking overlay over the entire page with a z-index higher,
make another cropped copy of the original div
overlay and abs position the copy div in the same place as the original content you want to be clickable with an even higher z-index?
Any thoughts?
I think the event.stopPropagation(); should be mentioned here as well. Add this to the Click function of your button.
Prevents the event from bubbling up the DOM tree, preventing any parent handlers from being notified of the event.
Just wrap a tag around all the HTML extract, for example
<a href="/categories/1">
<img alt="test1" class="img-responsive" src="/assets/photo.jpg" />
<div class="caption bg-orange">
<h2>
test1
</h2>
</div>
</a>
in my example my caption class has hover effects, that with pointer-events:none; you just will lose
wrapping the content will keep your hover effects and you can click in all the picture, div included, regards!
An easier way would be to inline the transparent background image using Data URIs as follows:
.click-through {
pointer-events: none;
background: url(data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7);
}
I think that you can consider changing your markup. If I am not wrong, you'd like to put an invisible layer above the document and your invisible markup may be preceding your document image (is this correct?).
Instead, I propose that you put the invisible right after the document image but changing the position to absolute.
Notice that you need a parent element to have position: relative and then you will be able to use this idea. Otherwise your absolute layer will be placed just in the top left corner.
An absolute position element is positioned relative to the first parent
element that has a position other than static.
If no such element is found, the containing block is html
Hope this helps. See here for more information about CSS positioning.
You can place an AP overlay like...
#overlay {
position: absolute;
top: -79px;
left: -60px;
height: 80px;
width: 380px;
z-index: 2;
background: url(fake.gif);
}
<div id="overlay"></div>
just put it over where you dont want ie cliked. Works in all.
This is not a precise answer for the question but may help in finding a workaround for it.
I had an image I was hiding on page load and displaying when waiting on an AJAX call then hiding again however...
I found the only way to display my image when loading the page then make it disappear and be able to click things where the image was located before hiding it was to put the image into a DIV, make the size of the DIV 10x10 pixels or small enough to prevent it causing an issue then hiding the containing div. This allowed the image to overflow the div while visible and when the div was hidden, only the divs area was affected by inability to click objects beneath and not the whole size of the image the DIV contained and was displaying.
I tried all the methods to hide the image including CSS display=none/block, opacity=0, hiding the image with hidden=true. All of them resulted in my image being hidden but the area where it was displayed to act like there was a cover over the stuff underneath so clicks and so on wouldn't act on the underlying objects. Once the image was inside a tiny DIV and I hid the tiny DIV, the entire area occupied by the image was clear and only the tiny area under the DIV I hid was affected but as I made it small enough (10x10 pixels), the issue was fixed (sort of).
I found this to be a dirty workaround for what should be a simple issue but I was not able to find any way to hide the object in its native format without a container. My object was in the form of etc. If anyone has a better way, please let me know.
I couldn't always use pointer-events: none in my scenario, because I wanted both the overlay and the underlying element(s) to be clickable / selectable.
The DOM structure looked like this:
<div id="outerElement">
<div id="canvas-wrapper">
<canvas id="overlay"></canvas>
</div>
<!-- Omitted: element(s) behind canvas that should still be selectable -->
</div>
(The outerElement, canvas-wrapper and canvas elements have the same size.)
To make the elements behind the canvas act normally (e.g. selectable, editable), I used the following code:
canvasWrapper.style.pointerEvents = 'none';
outerElement.addEventListener('mousedown', event => {
const clickedOnElementInCanvas = yourCheck // TODO: check if the event *would* click a canvas element.
if (!clickedOnElementInCanvas) {
// if necessary, add logic to deselect your canvas elements ...
wrapper.style.pointerEvents = 'none';
return true;
}
// Check if we emitted the event ourselves (avoid endless loop)
if (event.isTrusted) {
// Manually forward element to the canvas
const mouseEvent = new MouseEvent(event.type, event);
canvas.dispatchEvent(mouseEvent);
mouseEvent.stopPropagation();
}
return true;
});
Some canvas objects also came with input fields, so I had to allow keyboard events, too.
To do this, I had to update the pointerEvents property based on whether a canvas input field was currently focused or not:
onCanvasModified(canvas, () => {
const inputFieldInCanvasActive = // TODO: Check if an input field of the canvas is active.
wrapper.style.pointerEvents = inputFieldInCanvasActive ? 'auto' : 'none';
});
it doesn't work that way. the work around is to manually check the coordinates of the mouse click against the area occupied by each element.
area occupied by an element can found found by 1. getting the location of the element with respect to the top left of the page, and 2. the width and the height. a library like jQuery makes this pretty simple, although it can be done in plain js. adding an event handler for mousemove on the document object will provide continuous updates of the mouse position from the top and left of the page. deciding if the mouse is over any given object consists of checking if the mouse position is between the left, right, top and bottom edges of an element.
Nope, you can't click ‘through’ an element. You can get the co-ordinates of the click and try to work out what element was underneath the clicked element, but this is really tedious for browsers that don't have document.elementFromPoint. Then you still have to emulate the default action of clicking, which isn't necessarily trivial depending on what elements you have under there.
Since you've got a fully-transparent window area, you'll probably be better off implementing it as separate border elements around the outside, leaving the centre area free of obstruction so you can really just click straight through.
Here's the jfiddle for what I'm trying to achieve: http://jsfiddle.net/fmvmA/
I have two issues that I'm facing with this example; both of which I figure are related to event propagation. When the mouse enters the container, I'd like to have a div follow the cursor. When the cursor leaves the container, the following div should disappear. This seems like it should be simple... but I'm experiencing problems with the div flickering as you move the mouse, my guess is because the mouse is technically leaving the container when the tooltop div appears.
Additionally, I'd like to be able to click anywhere inside of the container and append a copy of the tooltip div to the position that was clicked. The example is finicky...but if you set the offset so that the tooltip div is no longer overlapping the mouse then you can see it work.
Is there any simple way to achieve my two goals?
It flickers because it triggers mouseout when the tooltip is shown since the #ghost is outside the container.. Move it inside and it should be all set..
DEMO
HTML:
<div id="container">
<div id="ghost">
Click to drop me!
</div>
</div>
Edit: I noticed a bug when having it inside the container that the #ghost doesn't hide even moving outside container.. so I added an offset to the #ghost so it appears 2px below the cursor.
JS:
$('#container').on('mousemove', function(event) {
$('#ghost').css({
left: event.pageX - $('#ghost').width() / 2,
top: ((event.pageY - $('#ghost').height() / 2) + 2) // +2 px is the offset
});
});
Here's a demo that works, you'll need to adjust the append positioning a bit. I stayed with the method of appending only on click as per original demo
http://jsfiddle.net/fmvmA/4/
I want to trigger an event handler when the user hovers on a particular part of the image, like the center of the image or the right side of the image (area would include, say, about a 100 pixels). I am not using any framework, so this is normal javascript that I am working with.
I am not sure if using image maps would work. Can anyone help?
Quirksmode about mouse position
Given the craziness involved here I would:
Use a framework (I just did something like this with Mootools)
Put absolutely positioned divs over the image and listen to events on them, instead of the image (did this too recently, a left 50% and a right 50%, way less cumbersome than tracking the mouse position).
Or go for it, quirksmode gives a decent function to get the mouse position, then you'll need to calculate the position of the image, then do the math to get the position of the mouse on the image, do the math in a mouseover event of the image, then continually check if the position meets your criteria, then do something about it when it does :)
You can use the MouseMove event to find out the location of the cursor, and then implement your own logic to calculate this position relative to the image.
See this page on getting the mouse coordinates.
i do not know how many areas you need and if they need to be especially shaped or something like that....
a straightforward solution would be placing (CSS) empty div elements "over" the image which will trigger the events
afaik it is not possible to trigger js events with an image map
An image map coupled with jquery is a great solution I've used before. I see that you're not using a framework, but it's worth a look.
Here's a little code snippet I used with an image map and mouseenter / mouseleave events.
$(".map-areas area")
.mouseenter(function() {
idx = $(".map-areas area").index(this);
showMapArea(idx);
})
.mouseleave(function() {
$(".map-hovers img").hide();
$(".map-titles img").hide();
});
I suggest putting an invisible div in the place where you want to check for mouse_over in the image. (In the case that the area you want is rectangular of course). And then trigger on mouse_over for this div.
If you want to check for non rectangular areas (that can't be a div), I would suggest that you put a div of the same size of the image on top of it. Check mouse position on that div, and use it to compare with a mask image.
Example:
MousePosOnGhostDiv_X = 76;
MousePosOnGhostDiv_Y = 145;
if(CheckColorOfMaskImage(MousePosOnGhostDiv_X,MousePosOnGhostDiv_Y)=="orange") do something.
By knowing which color it is on the mask image you can set multiple events.