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Javascript animation with variable speed based on cursors position

What I want to achieve is a javascript animation with variable speed based on cursor position.
For that porpouse I'm using jquery's animate function and mousever event and javascript's setInterval function, but those aren't required, so if there is a better way to achieve it I would be more than happy to hear it (the only requeriment would be javascript).
The problem I'm facing is that I can't change speed dinamicly, for some reason the speed keeps adding to the one it already had instead of set what I wanted and even if it would change as spected it just doesn't happen in a smoothly way because of an unknown reason for me.
Here is the javascript that I have so far:
//settings for container_slider. Are used in startSlider() which handles the animation
var steps_animation_speed = 1000;
var steps_interval = 1500;
var steps_speed_factor = 1; // 100%
var amount_sliders = 3;
//cache DOM elements
var $container_slider = $('#container_slider');
var $shown_slides = $('.shown_slides', $container_slider);
var $slide = $(".slide");
// Just making sure sizing (widths) fits as they should.
var slides_width = $container_slider.width()/amount_sliders;
var slides_margin = parseInt($slide.css('marginLeft').replace('px', '')) + parseInt($slide.css('marginRight').replace('px', ''));
var steps_width = slides_width + slides_margin;
$shown_slides.css('width', steps_width*(amount_sliders+1) + 'px');
$slide.css('width', slides_width);
var interval;
// This function is responsible of the animation
function startSlider() {
$shown_slides.stop(false);
interval = setInterval(function() {
$shown_slides.animate({'margin-left': '-='+steps_width}, steps_animation_speed*steps_speed_factor, function() {
$('.shown_slides > li:last').after($('.shown_slides > li:first'));
$('.shown_slides').css('margin-left', '0');
});
}, steps_interval);
}
function pauseSlider() {
clearInterval(interval);
}
$container_slider.mouseleave(function(){
steps_interval = 3000;
$shown_slides.stop(true);
pauseSlider();
startSlider();
});
// $container_slider.mouseenter(function(){
// pauseSlider();
// });
$container_slider.mousemove(function(event){
pauseSlider();
var cursor_location = '';
if(event.pageX > 0 && event.pageX < 165){
cursor_location = "Cursor is on the left side";
// This is where i'm doing the tests that should work of changing animation's speed based on cursor position
if(steps_speed_factor !== (event.pageX / 165)){
steps_speed_factor = event.pageX / 165;
steps_speed_factor = (steps_speed_factor < 0.15 ? 0.15 : steps_speed_factor);
steps_interval = 0;
startSlider();
}
} else if(event.pageX > 165 && event.pageX < ($container_slider.width()-165)){
cursor_location = "Cursor is in the center (paused)";
// This stops animation, it could be achieved way better but i'm focusing on above's block of code.
steps_speed_factor = 1;
steps_interval = 3000;
$shown_slides.stop(true);
pauseSlider();
} else if(event.pageX > ($container_slider.width()-165) && event.pageX < $container_slider.width()) {
cursor_location = "Cursor is on the right side";
// This would be an exact copy (almost) of the left side, but since it doesn't work yet, this is pretty much a "blank" block of code
steps_interval = 0;
steps_speed_factor = ( event.pageX - ($container_slider.width() - 165) ) / 165;
}
$(".coordinates").html("X: " + event.pageX + " Y: " + event.pageY );
$(".cursor_location").html(cursor_location);
$(".speed_factor").html("Speed Factor is: "+steps_speed_factor);
});
startSlider();
Here is a codepen showing this javascript code "working".
--- EDIT
I forgot to explain propperly what happens in the codepen , since it is just an example didnt give it to much importance. Mainly what should happen is that the furthier the cursor is from the center, the tinier/faster the invervals of the animation should be without losing fluidness.
In this case i'm using a "speed factor" which I calculate by taking cursor's X position and then comparing it with a predefined area, converting it in a percentage (decimal) from 15% to 99%. But it isn't actually the important part. I'm clueless about how to achieve this and the more I try the messier my code gets, so as long as you can give me an example of changing animation's speed (in "real" time, i mean, smoothly/fluid) based on cursor's position as an example it would be perfect.

.css transform not applying with jquery

I'm trying to play with mouse events in javascripts and ran into an issue.
I took this example : http://jsfiddle.net/vL5g3/1/ to understand how it works and later have tried to apply it in a transform case.
While I knew the result would mostlikely fail I at least expected that something would happen but nothing is happenning. Isn't is possible to apply css transform with jquery ?
Here is the code :
http://jsfiddle.net/pool4/Bbcp2/1/
var x=0,
y=0,
rate=0,
maxspeed=10;
var cont= $('.container');
$(cont).mousemove(function(e){
var $this = $(this);
var w = $this.width();
rate = -(e.pageX - $(this).offset().left + 1)/w;
});
cont.hover(
function(){
var scroller = setInterval( moveCont, 30 );
$(this).data('scroller', scroller);
},
function(){
var scroller = $(this).data('scroller');
clearInterval( scroller );
}
);
function moveCont(){
x += maxspeed * rate;
var newpos = 'translate('+x+'px, '+y+'px)';
$('.transform').css('-webkit-transform',newpos);
}

add at the end of moveCont
$('.transform').css('-moz-transform',newpos);
for mozilla hope it will work and your fiddle load jquery library.

I can't put some delay/animation

I have a function to set a top in a div, for show the notices.
Now i just want to put a delay to this function (effect), because the "top" is set to fast, and it's so horrible.
var rolarbaixo = function() {
var newtop = $('.plugin-noticias-rolar').position().top - 80;
$('.plugin-noticias-rolar').css('top', newtop + 'px').delay( 800 );
}
I tried to use .delay, but doesn't work.
Any help?

I gues what you want here is animate() to keep a smooth transition, try this:
var rolarbaixo = function() {
var newtop = $('.plugin-noticias-rolar').position().top - 80;
$('.plugin-noticias-rolar').animate({top : newtop + 'px'},800);
}

How would you use anchor points in a div when using the flexcroll plugin?

I want to have a custom scrollbar on my main div which has buttons to go to certain parts of the div, however anchor points don't seem to work when using the flexcroll plugin (I know i'm doing anchor points correctly because when I disable flexcroll on that div they work fine)
Is their any method I could use to set up the anchor points?
EDIT FOUND SOLUTION: On the buttons I want to click to go to the specific place in the document I can put onclick="Wrapper.fleXcroll.setScrollPos(false,0);"

I've used this function in the past. FYI, I don't know anything about flexcroll, so this is not tested with that:
var isInt = function(val) {
return (parseInt(val, 10) == val);
};
var scrollTo = function(node) {
var pNode = node.parentNode;
var offset = node.offsetTop - pNode.offsetTop;
var pHeight = pNode.clientHeight;
var height = node.clientHeight;
var scrollOffset = pNode.scrollTop;
var buffer = 10;
var scroll = null;
if (scrollOffset > offset) {
scroll = offset - buffer;
} else if (pHeight + scrollOffset < offset + height + buffer) {
scroll = offset + height + buffer - pHeight;
}
if (isInt(scroll)) {
pNode.scrollTop = scroll;
}
};
This is the pure JS version. (example)
Here is an example of a jQuery version, which animates the scroll event: jQuery version

Re-Centering JQuery Tooltips when resizing the window

I have written a function that positions a tooltip just above a textbox.
The function takes two arguments:
textBoxId - The ID of the textbox above which the tooltip will appear.
Example: "#textBoxA"
toolTipId - The ID of the tooltip which will appear above the textbox.
Example: "#toolTipA"
function positionTooltip(textBoxId, toolTipId){
var hoverElementOffsetLeft = $(textBoxId).offset().left;
var hoverElementOffsetWidth = $(textBoxId)[0].offsetWidth;
var toolTipElementOffsetLeft = $(toolTipId).offset().left;
var toolTipElementOffsetWidth = $(toolTipId)[0].offsetWidth;
// calcluate the x coordinate of the center of the hover element.
var hoverElementCenterX =
hoverElementOffsetLeft + (hoverElementOffsetWidth / 2);
// calculate half the width of the toolTipElement
var toolTipElementHalfWidth = toolTipElementOffsetWidth / 2;
var toolTipElementLeft = hoverElementCenterX - toolTipElementHalfWidth;
$(toolTipId)[0].style.left = toolTipElementLeft + "px";
var toolTipElementHeight = $(toolTipId)[0].offsetHeight;
var hoverElementOffsetTop = $(textBoxId).offset().top;
var toolTipYCoord = hoverElementOffsetTop - toolTipElementHeight;
toolTipYCoord = toolTipYCoord - 10;
$(toolTipId)[0].style.top = toolTipYCoord + "px";
$(toolTipId).hide();
$(textBoxId).hover(
function(){ $(toolTipId + ':hidden').fadeIn(); },
function(){ $(toolTipId + ':visible').fadeOut(); }
);
$(textBoxId).focus (
function(){ $(toolTipId + ':hidden').fadeIn(); }
);
$(textBoxId).blur (
function(){ $(toolTipId+ ':visible').fadeOut(); }
);
}
The function works fine upon initial page load:
However, after the user resizes the window the tooltips move to locations that no longer display above their associated textbox.
I've tried writing some code to fix the problem by calling the positionTooltip() function when the window is resized but for some reason the tooltips do not get repositioned as they did when the page loaded:
var _resize_timer = null;
$(window).resize(function() {
if (_resize_timer) {clearTimeout(_resize_timer);}
_resize_timer = setTimeout(function(){
positionTooltip('#textBoxA', ('#toolTipA'));
}, 1000);
});
I'm really at a loss here as to why it doesn't reposition the tooltip correctly as it did when the page was initially loaded after a resize.

Your logic for calculating the position of the tooltip only fires initially when you call positionTooltip. You want to call it to recalculate position before the fadeIn call.

i don't understand why you use a setTimeout() to launch your function. Try
$(function(){
// all your code onDocumentReady
...
...
$(window).resize(function() {
positionTooltip('#textBoxA', ('#toolTipA'));
});
});

That worked like a charm for me, the only drawback is that sometimes it dosen't get the proper X,Y position, apparently not it's compensating with object's padding/margin values, i did a dirty fix by adding those values manually before they are set like:
toolTipElementLeft = toolTipElementLeft + 40;
$(toolTipId)[0].style.left = toolTipElementLeft + "px";
and
toolTipYCoord = toolTipYCoord + 25;
$(toolTipId)[0].style.top = toolTipYCoord + "px";