jquery循环插件 - 操作next / prev按钮？

Question

I created a standart jquery slideshow from the jquery cycle plugin , which i didnt change. Now everything works just fine after I followed this tutorial. My Question now is, does anyone know how to change the plugins code, that the prev and next buttons are not both shown on mouseOver, but just one of them depending in which half of the slideshow the mouse is?

I would be really pleased if someone can help me :)

Answer 1

Update. I wasn't happy with my last update as it worked but could have been a little cleaner.

JSFiddle:

http://jsfiddle.net/lucuma/fg6d4/10/

$(document).ready(function() {
$('#sliders').hover(
function() {

    $('.controller', this).fadeIn();
}, function() {
    $('.controller', this).fadeOut();
});

$('#slideshow').cycle({
    prev: $('.controller .prev', this),
    next: $('.controller .next', this),
    after: function(currSlideElement, nextSlideElement, options, forwardFlag) {
        // you can easily adapt this to hide prev on firstslide and next on last slide
        if (options.currSlide < options.slideCount / 2) {
            $(options.prev).hide();
            $(options.next).show();
        } else {
            $(options.prev).show();
            $(options.next).hide();
        }

    }

});

});​​

HTML:

<div id="sliders">

    <div id="slideshow">

      <div><img src="http://weblogs.marylandweather.com/4526619322_1912218db8.jpg" /></div>
      <div><img src="http://www.silverstar-academy.com/Blog/wp-content/uploads/2012/03/03-14-12N00184967.jpg" /></div>
      <div><img src="http://cdn.the2012scenario.com/wp-content/uploads/2011/11/sunspot-500x500.jpg" /></div>
   </div>
    <div class="controller">
      <a href="#" class="prev">prev</a>
      <a href="#" class="next">next</a>
    </div>
</div>
​

CSS:

#sliders{width:500px;height:500px;position:relative}
#slideshow {width:100%;height:100%;}
#sliders .controller {display:none;position:absolute;top:50px;z-index:100;width:100%;height:20px}
#sliders .controller a {background-color:white;padding:10px;color:red}
#sliders .controller a.next {position:absolute;right:0}

​

Answer 2

I think you're going to have to add two elements layered on top of the image and add a toggle on roll over. Cycle doesn't toggle or position the buttons automatically.