CODEWITHSUNDEEP
jquerymousemovedirectionjquery-hoverjquery-calculation
yckart
yckart

Reputation: 33408

jQuery mousemove direction, get correct distance

Howdey, i need to create a direction aware hovering effect, but stuck at the correct calculation. (Is it a calculation problem or rather a wrong markup?)

Here's what I've done so far:

The left and right arrows works as expected, but up and down fails. Any ideas what i'm doing wrong?

$("#circle").on('mousemove', function(e) {
    var elem = $(this),
        arrowT = $('.arrow.top'),
        arrowR = $('.arrow.right'),
        arrowB = $('.arrow.bottom'),
        arrowL = $('.arrow.left'),

        offset = elem.offset(),
        pageX = e.pageX - offset.left,
        pageY = e.pageY - offset.top,
        side = {
            top: pageY < (elem.height() / 2),
            left: pageX < (elem.width() / 2),
            bottom: pageY > (elem.height() / 2),
            right: pageX > (elem.width() / 2)
        };


    arrowT.css({
        top: side.top ? pageY - arrowT.outerHeight() : null
    });
    arrowR.css({
        right: side.right ? -(pageX - (elem.width() - arrowR.outerWidth())) : null
    });
    arrowB.css({
        bottom: side.bottom ? -(pageY - (elem.height() - arrowB.outerHeight())) : null
    });
    arrowL.css({
        left: side.left ? pageX - arrowL.outerWidth() : null
    });
});

Upvotes: 1

Views: 2766

Answers (3)

kushpf
kushpf

Reputation: 1098

I hope this helps. That was because the element size changes on moving mouse over it.

http://jsfiddle.net/t4EME/5/

topc = $('#circle').position().top;
widk = $('#circle').height();
$("#circle").mousemove( function(e) {
    var elem = $(this),
        arrowT = $('.arrow.top'),
        arrowR = $('.arrow.right'),
        arrowB = $('.arrow.bottom'),
        arrowL = $('.arrow.left'),

        offset = elem.offset(),
        pageX = e.pageX - offset.left,
        pageY = e.pageY - offset.top,
        side = {
            top: pageY < (elem.height() / 2),
            left: pageX < (elem.width() / 2),
            bottom: pageY > (elem.height() / 2),
            right: pageX > (elem.width() / 2)
        };   
if(e.pageY>topc && e.pageY<topc+widk) {
$('.top').css({
    top: side.top ? pageY - arrowT.outerHeight()  : null
});
$('.right').css({
    right: side.right ? -(pageX - (elem.outerWidth() - arrowR.outerWidth())) : null
});
$('.bottom').css({
    bottom: side.bottom ? -(pageY - (elem.outerHeight() - arrowB.outerHeight())) : null
});
$('.left').css({
    left: side.left ? pageX - arrowL.outerWidth() : null
});
}
});​

Upvotes: 1

eleven11
eleven11

Reputation: 362

http://jsfiddle.net/t4EME/7/

Here is a working version with links

        top: pageY < (elem.height() / 2) && pageY  > 0 ,
        left: pageX < (elem.width() / 2) && pageX  > 0,
        bottom: pageY > (elem.height() / 2)  && pageY  < elem.height(),
        right: pageX > (elem.width() / 2) && pageX  < elem.width()

Changed to absolute positioning as the margin was hiding the links

Upvotes: 0

Popnoodles
Popnoodles

Reputation: 28409

It's to do with the body height changing as the elements are moved. Stick a wrapper on it whose size doesn't change and they work

http://jsfiddle.net/t4EME/4/

#wrap
{
    height:1000px; overflow:hidden;
    padding-top:100px;
}


<div id="wrap">
    <div id="circle">
        <a href="#" class="arrow top"></a>
        <a href="#" class="arrow right"></a>
        <a href="#" class="arrow bottom"></a>
        <a href="#" class="arrow left"></a>
    </div>
</div>​

Upvotes: 1

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