jQuery tooltip ui: issue with using onmouseover and getting double displays - javascript

Please see attached image:
The html (I just broke it up in 3 lines so you wouldn't have to scroll to the right):
<!-- MapServer Template -->
<area shape="circle" coords="[shpxy precision=0 proj=image yf=",7" xf=","]"
title="[name]" alt="[name]" onmouseover='displayCityInfo("[name]");
displayToolTip();' onmouseout="hideCityInfo()">
The jquery:
function displayToolTip() {
$( document ).tooltip({track: true, items: '[title]', content: getContent});
}
function getContent() {
var element = $(this);
if (element.is('[tooltip]')) {
var src = element.attr('tooltip');
return '<img src="' + src + '" width="100">';
}
if (element.is('[title]')) {
return element.attr('title');
}
}
The issue:
I am not sure why there is basically "double hovers". If I just move my mouse around the map quickly, the names get stacked on top of each other in the top left corner.
1) I do not want any tool tips in the top left corner.
2) I just want to hover over a golden point, and the tool tip appears. As you can see in the image, this is happening...somewhat.
3) Don't mind the teal-colored rectangle.
The goal:
Remove the tool tips in the top left corner, and just have tool tips when you hover over a golden point.
Any input on the matter is appreciated. I was looking through the documentation but I am not sure what I'm doing wrong.

Tooltips are one of those things that never quite works the way you expect it to and end up taking a lot more time than you expect. There a lot of factors involved but most notoriously are timing and browser type and version.
The timing issue: if the element you are hovering on has an alt or a title attribute at render time, once the hover event fires and the listener is called, it's too late, the default tooltip will show no matter what you at that point. Sometimes, you might get lucky and solve it with a event.preventDefault() or browser equivalents.
The browser issue: unsurprisingly, many versions of IE (7,8,9) once the alt or title attribute has been rendered, there is just no way to stop it from displaying the default tooltip. There are several workarounds but most include removing alt and title attributes from the html itself (i.e. before the browser has a chance to see it) and using an xhr to get the text contents of the tooltip.
Hope this helps.

Related

How to increase speed of mousemove/clientX/Y and applying a transform?

I have built a WordPress theme. I came across a website that created a div to follow the user's cursor. The div was enlarged smoothly when the user hovers over a button or a link.
I want to add this nice functionality as an optional feature.
I added a div to the web page, #ambition_cursor and added some basic styling. The div now shows like a blue circle. The circle has position fixed to the top left corner of the site. The position can be changed by adding a CSS translate property.
I managed to make it work with the following code:
var ambition_cursor = document.getElementById("ambition_cursor");
function ambition_mouse(e) {
var ambition_cursor_x = e.clientX; // Get the horizontal coordinate
var ambition_cursor_y = e.clientY; // Get the vertical coordinate
var ambition_cursor_pos = `translate(${ambition_cursor_x}px, ${ambition_cursor_y}px)`;
ambition_cursor.style.transform = ambition_cursor_pos;
}
window.addEventListener('mousemove', ambition_mouse);
The big downside here is the lag (?). There's quite a big delay, especially when moving the mouse around very fast. You can try it out on this site. I also put the situation in a JSFiddle; although the delay doesn't really happen there.
I didn't apply yet much styling (the default cursor is visible, so you can get a better idea of the real position). I first want this to work better, before I spent much time on that.
How can I increase the speed of this, so that the div position follows the mouse more accurately? I'm a beginner, so I don't really know which JavaScript optimisations I should make.
Current code is JavaScript, but jQuery is also an option.
Many thanks in advance!
Update: example how it looks on my computer.
All elements on the page have a transition applied. Remove/override this style and the delay goes away (tested).
As an alternative to the great answer of Joseph Atkinson:
var ambition_cursor = document.getElementById("ambition_cursor");
function ambition_mouse(e) {
ambition_cursor.style.left = e.clientX + 'px'; // Get the horizontal coordinate
ambition_cursor.style.top = e.clientY + 'px' ; // Get the vertical coordinate
}
window.addEventListener('mousemove', ambition_mouse);
See: https://levelup.gitconnected.com/use-javascript-to-make-an-element-follow-the-cursor-3872307778b4
I visited the site example, cracked open the dev console, and found throttled(20, ambition_mouse) It is not a performance issue, and the solution is to not throttle the events. It was too smooth to be a performance issue, which gave me the first clue it had to be an accidental/deliberate effect.

Flexslider breaks jQuery accordion [duplicate]

I have a test page to better explain my problem. I have several items on a list (they're images on the test page); when I click on one of them, a corresponding slideshow, using flexslider, sldes down.
The problem is that, on page load, the slideshow shows all slides at once, at a much smaller size than intended. But then, if I switch the focus from the window (i.e. switch between browser tabs or move to another program and come back), the slideshow is now working and the slides are the proper size. This happens in mobile devices too.
When I check with firebug, there's an element.style rule applying to ul.slides:
transform: translate3d(-89px, 0px, 0px);
Which hides one of the slides. Additionally, there's another rule for the list items inside ul.slides that gives them their initial width, which is not even the same for all sliders so I don't understand where it is coming from.
Can someone take a look and suggest a fix? I've tried overriding the element.style rule but so far unsuccessfully.
I think I've figured it out, in principal at least...
.flexslider{display:none;} seems throw off the re-size function of Flexslider.
You could just remove it, but that makes for some ugly loading.
To avoid said ugly loading I put together a quick, work-around- jsFiddle
$(document).ready(function(){
$(".flexslider").css('display','block').slideUp();
});
There's a still a quick glitch while loading, but hopefully it will at least steer you in the right direction.
Another method I played with a bit was to try and force the re-size function like so-
$(".client").click(function () {
$('.flexslider').resize(); // Problematic but promising
var project = this.id;
var project_id = '#' + project + '-project';
var elem = $(".flexslider:visible").length ? $(".flexslider:visible"): $(".flexslider:first");
elem.slideUp('slow', function () {
$(project_id).slideDown('slow');
});
});
This sort of solved the mini-picture issue, but was spotty at best.

Show hidden image on mouseover

I have a problem when trying achieve hover effect on mapped image. I have an image with mapped areas and on all of them I want to show a different image when hover.
You can see my work so far here:
http://mantasmilka.com/map/pries-smurta.html
The problem is when I hover over area it show the image, but when I move the cursor (not leaving the area) it starts flickering. It takes area space pixel by pixel.
I've tried working with Javascript and jQuery solutions:
Javascript:
mouseenter="document.getElementById('Vilnius').style.display = 'block';" mouseleave="document.getElementById('Vilnius').style.display = 'none';"
jQuery:
$('.hide').hide();
setTimeout(function(){
$("#area-kaunas").mouseenter(function(){
$('#Kaunas').show();
});
$("#area-kaunas").mouseleave(function(){
$('#Kaunas').hide();
});
}, 500);
Why not just use hover() inside of jQuery? I'm also unsure why you bind the events after a 500 millisecond timeout?
$('.hide').hide();
$("#area-kaunas").hover(function() {
$('#Kaunas').show();
}, function() {
$('#Kaunas').hide();
});
There is a css property called "pointer-event" which gives the value "none" to the img tags that overlap in the mapped image and works as you need it. This is the documentation https://developer.mozilla.org/en/docs/Web/CSS/pointer-events
The problem will always be the compatibility of browsers.

Display image on top of page with big 3 + jquery, in FireFox?

Would like to bring a single image to the front or on top of the page, when selected.
After searching, it seems there are many plug-ins that support this - but also have a lot of other functionality and overhead I don't need (gallery, support for video, thumbnails, etc.)
Is it possible to just bring a single image on top with basic JavaScript, CSS, HTML and jQuery, specifically in FireFox?
Thank You.
(Please note*: This is an in house product, hence these requirements and constraints.)
Is it possible to just bring a single image ontop with basic JavaScript, CSS, HTML and jQuery, specifically in FireFox?
Yes, it's possible, but the plugins are most of the time an easier implementation. What you are trying to accomplish is something similar to the light box effect, but I'll try to give a simple solution based on 4 steps you need to accomplish what you are trying to do:
Create an overlay div. This one div will blur or darken your entire page. In the below example it will darken your screen (because it's simpler).
Create an div that will be appended to the overlay div and will contain the image you want to show. In the demo below, this div will be lighter than the overlay one and will actually have half the width and half the height of your screen.
Append a bigger image to your image-div.
Add a subtitle to your image based on it's alt text.
$(document).ready(function()
{
var docWidth = $(document).width();
var docHeight = $(document).height();
//First Step" Creating the overlay-div and adding opacity to it
var overlayDiv = "<div id="overlay-div"></div>"
$("body").append(overlayDiv);
$("#overlay-div").css("position","absolute", "top","0","left","0","background-color","#000","opacity","0.5", "width", docWidth + "px", "height",docHeight + "px");
//Second step: Creating the image-div and centering it on the screen
$("#overlay-div").append("<div id=\"image-div\"></div>");
$("#image-div").css("position","absolute", "top",docHeight/4 + "px","left",docWidth/4 + "px","background-color","#FFF", "width", docWidth/2, "height",docHeight);
//Third step: Creating an image to display inside the image-div and centering it
$("#image-div").append("<img src=\"path/to/your/image\"id=\"zoomed-img\" alt=\"This is a zoomed image\"/>");
var imgWidth = $("#image-div").width();
var imgHeight = $("#image-height").height();
$("#image-div").css("position","absolute", "top","10px","left","10px");
//Fourth step: Creating a subtitle from the alt text
var subtitle = "<p id=\"text-subtitle\">" + $("#image-div").attr("alt") + "</p>";
$("#image-div").append(subtitle);
$("#text-subtitle").css("position","absolute", "top",imgHeight + 20 + "px","left","10px");
});
This function is triggered when your document is ready, and get an arbitrary image. But it's possible to display a different image (with a different subtitle) triggered by a click with a little tweak of the code above.
I had the intention to show you a simple demo that it's feasible to with with a few lines of jQuery/javascript code to create what you want. Of course it's not as pretty as 90% of the effects of the plugins there are around but it may be a start.
I hope it helped. Cheers
Here is a very basic example I whipped up. Hopefully good to learn from:
http://jsfiddle.net/v9LTP/2/
$('img').click(function(){ //bind a click event handler to images
var img = $(this).clone().addClass('modal').appendTo($('#blackout')); //clone the clicked image element and add to the blackout div which gives the dark background.
$('#blackout > #close').click(function(){ //attach click handler to close button
$('#blackout').fadeOut(function(){ //fade the blackout div
img.remove(); //remove the image element we cloned, so we can do it again.
});
});
$('#blackout').fadeIn(); //show the blackout div
});
​
For a stupid simple lightbox I've been leveraging http://buckwilson.me/lightboxme/ lately.
Try Modals of Bootstrap.
JavaScript - Twitter Bootstrap
GitHub source code
GitHub bootstrap-modal.js

jQueryui animation with inital undefined height

See the following fiddle:
[edit: updated fiddle => http://jsfiddle.net/NYZf8/5/ ]
http://jsfiddle.net/NYZf8/1/ (view in different screen sizes, so that ideally the image fits inside the %-width layouted div)
The image should start the animation from the position where it correctly appears after the animation is done.
I don't understand why the first call to setMargin() sets a negative margin even though the logged height for container div and img are the very same ones, that after the jqueryui show() call set the image where I would want it (from the start on). My guess is that somehow the image height is 0/undefined after all, even though it logs fine :?
js:
console.log('img: ' + $('img').height());
console.log('div: ' + $('div').height());
$('img').show('blind', 1500, setMargin);
function setMargin() {
var marginTop =
( $('img').closest('div').height() - $('img').height() ) / 2;
console.log('marginTop: ' + marginTop);
$('img').css('marginTop', marginTop + 'px');
}
setMargin();
Interesting problem...after playing around with your code for a while (latest update), I saw that the blind animation was not actually firing in my browser (I'm testing on Chrome, and maybe it was firing but I wasn't seeing it as the image was never hidden in the first place), so I tried moving it inside the binded load function:
$('img').bind('load', function() {
...
$(this).show('blind', 500);
});
Now that it was animating, it seemed to 'snap' or 'jump' after the animation was complete, and also seemed to appear with an incorrect margin. This smacks of jQuery not being able to correctly calculate the dimensions of something that hadn't been displayed on the screen yet. On top of that, blind seems to need more explicit dimensions to operate correctly. So therein lies the problem: how to calculate elements' rendered dimensions before they've actually appeared on the screen?
One way to do this is to fade in the element whose dimensions you're trying to calculate very slightly - not enough to see yet - do some calculations, then hide it again and prep it for the appearance animation. You can achieve this with jQuery using the fadeTo function:
$('img').bind('load', function() {
$(this).fadeTo(0, 0.01, function() {
// do calculations...
}
}
You would need to work out dimensions, apply them with the css() function, blind the image in and then reset the image styles back to their original states, all thanks to a blind animation that needs these dimensions explicitly. I would also recommend using classes in the css to help you manage things a little better. Here's a detailed working example: jsfiddle working example
Not the most elegant way of doing things, but it's a start. There are a lot more easier ways to achieve seemingly better results, and I guess I just want to know why you're looking to do image blinds and explicit alignment this way? It's just a lot more challenging achieving it with the code you used...anyways, hope this helps! :)

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