Develop Reference

Get fixed position based on underlying div if still exists

I created a rough idea of the filter I'm creating offline.
Basically the filter or "update row" section shows red, blue or green if available. Can be any combination of results(ie. just blue and green) I have a div that's positioned at the top at all times. So when viewing the blue section it is over that row(fixed to top).
If I select the filter the positioning is lost as you can imagine as sometimes rows will not be present from above or the underlying row may not exist anymore. My question is. How can I get the row name underneath at click then use that to scroll to once everything else is complete. Of course if it's not present then just go to top of table_listing.
success: function(data, textStatus, XMLHttpRequest) {
jQuery('#table_listing').hide().html(data).fadeIn('slow'); // put our list of links into it
$('html, body').animate({
scrollTop: $("#table_listing").offset().top
}, 1000);

I created a working example HERE.
So the idea is to use $(document).scrollTop() to find how much the page is scrolled. Then compare it with the height of the divs to find the one we are on. Then we store it in a variable in a dynamic manner. When user clicks filter button, we know where we have been before, so we can scroll back to that element. Check out the console to see the result. Since scroll() event is only bind to user manual scrolling, it will not be affected by animating of scroll, as you want to have.

Adding animate in and animate out classes with one menu button

I was wondering, for all you javascript and jquery guru's what would be my best way to tackle this problem. What I have is a navigation that is hidden via CSS to the bottom of the screen. I've managed to have it working as a toggle fine - which you can see here http://jsfiddle.net/olichalmers/Lby7vfdf/.
var body = $("body"); $("#menuBtn").click(function() {
body.toggleClass("showMenu");});
This obviously means that the menu slides up and down.
What my problem is is that I want to animate the menu up on the initial click, and then when you click the button again to close it I want the navigation window to slide up. Then when you click it again to open it, it is appearing from the bottom again. I've been trying to get my head around how this would work and what I think is that it would be two classes (one for hide menu, and one for show menu) which would be added and removed from the body. I have a jsfiddle here http://jsfiddle.net/olichalmers/twqd2yj0/
var body = $("body"); $("#menuBtn").click(function() {
if (body.hasClass("hideMenu")) {
body.removeClass("hideMenu").addClass("showMenu");
}
else if (body.hasClass("showMenu")) {
body.removeClass("showMenu").addClass("hideMenu");
}});
This is probably shocking in it's attempt to come to a solution to this problem. I'm using jquery but maybe it is a javascript solution using an event listener that is needed here? My jquery and javascript knowledge is patchy at best as i'm still in the midst of learning so please go easy if I appear very dumb!
Hope i've been clear enough. Thanks.

May I suggest a different approach?
Create your bottom menu in a separate DIV, located at very top of your HTML (directly under BODY tag). Make that DIV position: fixed -- that takes it out of the "flow" and positions it relative ot the viewport (the screen), not to any other divs or to the web page itself. Now, you can move it up/down based on some trigger.
Here is a code example:
jsFiddle Demo
HTML:
<div id="botttrig"></div>
<div id="bottmenu">The menu is here</div>
<div id="wrap">
<div id="content">
<p>Content goes here</p>
<p>Hover over small box at bottom left</p>
</div>
</div>
jQuery:
$('#botttrig').hover(
function(){
$(this).fadeOut();
$('#bottmenu').animate({
'bottom': '0px'
},500);
},
function(){
//do nothing on hover out
}
);
$('#bottmenu').hover(
function(){
//do nothing on hover in
},
function(){
$('#bottmenu').animate({
'bottom': '-80px'
},500);
$('#botttrig').fadeIn();
}
);
See this jsFiddle for another example. I removed the trigger box, and left the top 10px of the menu visible at screen bottom. Upon hover, slide the menu up. You may wish to increase the z-index on the #bottmenu div to always display it above the other DIVs on the page, so that it is always visible.

http://jsfiddle.net/twqd2yj0/4/
I've used slideToggle() and added display:none; to #navHold

What do you call a div that slides out from beneath another div when moused over?

I'm trying to create a Javascript effect I'm sure I've seen done many times before. However, I can't seem to find the right terminology for it. It's not a "slider", or a "slide out menu" or a "slide out tab" or a "tab". So far those terms have caused Google to take me to all sorts of examples and tutorials for things that are not what I'm after.
The effect I'm after is like this:
Div 2 sits behind Div 1 until the user mouses over the visible portion of Div 2, which causes it to slide out to reveal more of itself. When the user mouses away, Div 2 slides back underneath Div 1.
What do you call this effect, so that I can find turorials or Javascript code for it? Or if anyone can direct me to an example or explain how to do it, that would be great.

I'm sorry for a terrible code, but do you need something like this?
http://jsfiddle.net/D7Z8v/
$("#smalldiv").hover(function() {
$("#smalldiv").animate({marginLeft: 200});
}, function() {
$("#smalldiv").animate({marginLeft: 0});
});
You probably need to change "marginLeft" inside hover function on something more appropriate, but it's looks like what you needed.

You can use z-index to have div1 above div2 and then you can either use a CSS animation, jQuery animation to change the position of div2 or you can adjust the width of div2.

Correct way to reset jScrollPane viewport position

I've been looking around for answers and everything I apply to my own code doesn't seem to work. I have a DIV with content. When I click on a link the DIV fades out, the content changes via the jQuery .html event and then the DIV fades back in. This gives the illusion of a gentle page change on my site. This DIV has a jScrollPane which works fine before any links are pressed.
What is happening however is that the scroll pane 'draggable area' stays the same size when the content is re-written and there is more or less, or even if there is no need for one at all.
I need to get the scroll pane 'draggable area' to change size in relation to the new content and I need it to scroll back to the top inbetween the .fadeTo fade out and in effect.
I've tried some of the following:
function showhome() {
$('#infohome').stop(true,true).fadeTo(100,0)
$('#infohome').delay(100).html("NEW CONTENT")
$('#infohome').stop(true,true).delay(200).fadeTo(100,1)
refreshNav();
function refreshNav() {
var element = $('.scroll-pane').jScrollPane({scrollToY(0, animate)});
var api = element.data('jsp');
}
As well as:
myJScrollPane.getVerticalScrollbar().setValue(int Pos);
and a few others.
As always, any help would be greatly appreciated.

How to keep div focus when the mouse enters a child node

So I have this page here:
http://www.eminentmedia.com/development/powercity/
As you can see when you mouse over the images the div slides up and down to show more information. Unfortunately I have 2 problems that i can't figure out and I've searched but haven't found quite the right answer through google and was hoping someone could point me in the direction of a tutorial.
The first problem is that when you mouse over an image it changes to color (loads a new image), but there's a short delay when the image is loading for the first time so the user sees white. Do I have to preload the images or something in order to fix that?
My second problem is that when you move your mouse over the 'additional content area' it goes crazy and starts going up and down a bunch of times. I just don't have any idea what would cause this but i hope one of you will!
All my code is directly in the source of that page if you would like to view the source.
Thanks in advance for your help!

Yes, you have to preload the images. Thankfully, this is simple:
var images_to_preload = ['myimage.jpg', 'myimage2.jpg', ...];
$.each(images_to_preload, function(i) {
$('<img/>').attr({src: images_to_preload[i]});
});
The other thing you have to understand is that when you use jQuery you have to truly embrace it or you will end up doing things the wrong way. For example, as soon as you find yourself repeating the same piece of code in different places, you are probably doing something wrong. Right now you have this all over the place:
<div id="service" onmouseover="javascript:mouseEnter(this.id);" onmouseout="javascript:mouseLeave(this.id);">
Get that out of your head. Now. Forever. Always. Inline javascript events are not proper, especially when you have a library like jQuery at your disposal. The proper way to do what you want is this:
$(function() {
$('div.box').hover(function() {
$(this).addClass('active');
$(this).find('div.slideup').slideDown('slow');
}, function() {
$(this).removeClass('active');
$(this).find('div.slideup').slideUp('slow');
});
});
(You have to give all the #industrial, #sustainable, etc elements a class of 'box' for the above to work)
These changes will also fix your sliding problem.

I can see your images (the ones that are changing) are set in the background of a div. Here is a jquery script that preloads every image found in a css file. I have had the same problem in the past and this script solves it. It is also very easy to use:
http://www.filamentgroup.com/lab/update_automatically_preload_images_from_css_with_jquery/
I will take a look at your other problem...

1) You should be using the jquery events to drive your mouseovers. Give each div a class to indicate that its a category container and use the hover function to produce the mouseover/mouseout action you're after.
html
<div id="industrial" class="category"></div>
Javascript
$(".category").hover(
function () {
$(this).find('.container').show();
},
function () {
$(this).find('.container').hide();
}
);
I simplified the code to just do show and hide, you'll need to use your additional code to slide up and slide down.
2) Yes, you need to preload your images. Another option would be "sprite" the images. This would involve combining both the black and white and colour versions of each image into a single image. You then set it as the div's background image and simply use CSS to adjust the background-position offset. Essentially, sliding instantly from the black and white to colour images as you rollover. This technique guarentees that both images are fully loaded.