我根据TweenMax easings和jQuery mousewheel事件创建了一个自定义div滚动条。滚动就像一个魅力,但我需要移动滚动条处理程序来显示滚动进度。我根据父宽度,scrollLeft和总div宽度的计算进行了一些测试,但没有找到正确的解决方案......
I tried让this example适应我的水平滚动条,但它仍然是一种奇怪的行为。
有什么想法吗?
$(window).on("mousewheel DOMMouseScroll", function (e) {
e.preventDefault();
var delta = e.originalEvent.wheelDelta / 120 /* Chrome */ || -e.originalEvent.detail; /* FF */
var dur = 1.2;
TweenLite.to($("#photos"), dur, {
scrollLeft: $("#photos").scrollLeft() - parseInt(delta * 35),
ease: Expo.easeOut,
overwrite: 5
});
});
答案 0 :(得分:2)
<强> jsBin demo 强>
(P.S:使用Tween onUpdate
callback function在图库滚动上移动处理程序)
<强>逻辑:强>
// How much available scroll-space** have our elements:
//
// |--$element--|<---------------avail scroll space--------------->|
// |<------------------------total width-------------------------->|
//
// Same logic goes for both elements:
galleryAvailScroll = $gallery[0].scrollWidth - $gallery.outerWidth(true);
handlerAvailScroll = $scrollbar.width() - $handler.width();
// On $gallery scroll, how to move the $handler to the proper left position?
handlerLeft = $gallery.scrollLeft() * handlerAvailScroll / galleryAvailScroll; // left PX
这就是它。在滚动上进行数学计算,同时在窗口调整大小上使数据处理器像真正的滚动条一样:
以下是简化的CSS,HTML和JS的最终结果
var $gallery = $("#thumbs"),
$scrollbar = $("#scrollbar"),
$handler = $("#scrollbar-handle"),
galleryAvailScroll = 0,
handlerAvailScroll = 0,
handlerLeft = 0;
function setPos() {
galleryAvailScroll = $gallery[0].scrollWidth - $gallery.outerWidth(true); // PX
handlerAvailScroll = $scrollbar.width() - $handler.width(); // PX
handlerLeft = $gallery.scrollLeft() * handlerAvailScroll / galleryAvailScroll;
$handler.css({left: handlerLeft});
}
setPos(); // Get the sizes
$(window).on("resize", setPos); // Also on resize
// Scroll
$gallery.on("mousewheel DOMMouseScroll", function (e) {
e.preventDefault();
var eorg = e.originalEvent,
delta = eorg.wheelDelta/120 || -eorg.detail; // Ch || FF
TweenLite.to( $gallery, 0.7, {
scrollLeft : $gallery.scrollLeft() - delta * 35,
ease : Expo.easeOut,
overwrite : 5,
onUpdate : setPos
});
});
&#13;
body {
padding: 15px 0 0;
margin: 0;
}
#thumbs {
position:relative;
overflow:hidden;
padding:0 10px;
height: 175px;
white-space: nowrap;
}
#thumbs > div {
font-size:16px;
display:inline-block;
width: 150px; height: 150px;
margin: 0 6px; /*6 + 4 LineWidth = 10 */
background:#000;
}
#scrollbar {
margin:0 70px;
height:3px;
position:relative;
background:#ddd;
}
#scrollbar-handle {
position:absolute;
width:12%;
left:0;
height:3px;
background:red;
}
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/gsap/latest/TweenMax.min.js"></script>
<div id="thumbs">
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
</div>
<div id="scrollbar">
<span id="scrollbar-handle"></span>
</div>
&#13;
由于您的处理程序是&#34;已修复&#34;在12%
宽度,如果您决定使其与宽度内容相关,则可以从How to make custom scrollbar jQuery plugin获得所需的数学