使用 jQuery 检测水平滚动 div 的结尾

发布于 2024-11-06 13:09:23 字数 888 浏览 0 评论 0原文

所以,我在 div 中扔了一些数据。它按日期分成块。它使用 jQuery 和鼠标滚轮插件水平滚动。

当 div 到达终点(最左、最右)时,我需要触发一个事件。我认为可以通过当前实现的方式来通过检测鼠标滚轮插件中获取的数据来计算何时无法进一步滚动。我只需要朝着正确的方向推动。这是为我执行水平滚动的代码:

$(document).ready(function () {        
    $('#timeline').mousedown(function (event) {
        $(this)
            .data('down', true)
            .data('x', event.clientX)
            .data('scrollLeft', this.scrollLeft);
        return false;
    }).mouseup(function (event) {
        $(this).data('down', false);
    }).mousemove(function (event) {
        if ($(this).data('down') == true) {
            this.scrollLeft = $(this).data('scrollLeft') + $(this).data('x') - event.clientX;
        }
    }).mousewheel(function (event, delta) {
        this.scrollLeft -= (delta * 30);
    }).css({
        'overflow' : 'hidden',
        'cursor' : '-moz-grab'
    });
});

有人能给我一些指示吗?谢谢!

So, I've got some data tossed in a div. It's split up into chunks by date. It scrolls horizontally with the use of jQuery and the mousewheel plugin.

I need to fire an event when the div has reached it's terminal point (farthest left, farthest right). I think that it is possible with the way it is currently implemented to calculate when you cannot scroll any further by detecting the data fetched in the mousewheel plugin. I just need a nudge in the right direction. Here's the code that does the horizontal scrolling for me:

$(document).ready(function () {        
    $('#timeline').mousedown(function (event) {
        $(this)
            .data('down', true)
            .data('x', event.clientX)
            .data('scrollLeft', this.scrollLeft);
        return false;
    }).mouseup(function (event) {
        $(this).data('down', false);
    }).mousemove(function (event) {
        if ($(this).data('down') == true) {
            this.scrollLeft = $(this).data('scrollLeft') + $(this).data('x') - event.clientX;
        }
    }).mousewheel(function (event, delta) {
        this.scrollLeft -= (delta * 30);
    }).css({
        'overflow' : 'hidden',
        'cursor' : '-moz-grab'
    });
});

Can anybody give me some direction? Thanks!

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评论(3

牛↙奶布丁 2024-11-13 13:09:23

嘿,我已经为您准备了一个实施页面。您可以了解如何使用 jQuery 检测滚动区域的结尾。

对于整个文档,您必须在 javascript 中检测 .scrollTop 是否等于 .scrollHeight。对于 jQuery,它将检测:

if ( $(document).scrollTop() == ( $(document).height() - $(window).height() ) {
  // Do something here ...
}

宽度也是如此。在此处查看 div 的示例。

Hey, I've prepared a page for you with the implementation. You can see how to detect the end of scrolling area with jQuery.

For the document as a whole you must detect in javascript whether .scrollTop has become equal to .scrollHeight. With jQuery it would be to detect:

if ( $(document).scrollTop() == ( $(document).height() - $(window).height() ) {
  // Do something here ...
}

The same is done for width. Have a look on example with div here.

烟酉 2024-11-13 13:09:23

这是您想要的代码。
事实证明,它可以在 IE、Safari、Chrome、Firefox 等浏览器上运行。

这是 HTML 部分。

    <div id="slide-wrap" style="width:1000px; height:200px; overflow:hidden; padding:0 auto;">
        <div id="inner-wrap" style="float:left;">
            <!-- 'Put Inline contains here like below.' -->
            <div class='containBox' style="width:250px; height:100%; float:left; display:inline-block;"></div>
            <!--  ...  -->
            <div class='containBox' style="width:250px; height:100%; float:left; display:inline-block;"></div>
            <!-- 'Put Inline contains here like above.' -->
        </div>
        <div style="display: block; width:40px; height:60px; position: absolute; margin-left:0px;   margin-top:40px">
            <img id='scroll_L_Arrow' src='../assets/img/l-arrow.png' onclick="scrollThumb('Go_L')"/>
        </div>
        <div style="display: block; width:40px; height:60px; position: absolute; margin-left:960px; margin-top:40px">
            <img id='scroll_R_Arrow' src='../assets/img/r-arrow.png' onclick="scrollThumb('Go_R')"/>
        </div>
    </div>

这是 JavaScript 函数中的 jQuery 部分。

    function scrollArrowShow() {
        var maxScroll = ($('#inner-wrap').width() - $('#slide-wrap').scrollLeft()) - $('#slide-wrap').width();
        if ( 0 == $('#slide-wrap').scrollLeft()) {
            $('#scroll_L_Arrow').css({visibility: 'hidden'});
        }else{
            $('#scroll_L_Arrow').css({visibility: 'visible'});
        }
        if ( 0 == maxScroll) {
            $('#scroll_R_Arrow').css({visibility: 'hidden'});
        }else{
            $('#scroll_R_Arrow').css({visibility: 'visible'});
        }
    }

       function scrollThumb(direction) {
        if (direction=='Go_L') {
            $('#slide-wrap').animate({
                scrollLeft: "-=" + 250 + "px"
            }, function(){
                // createCookie('scrollPos', $('#slide-wrap').scrollLeft());
                scrollArrowShow();
            });
        }else
        if (direction=='Go_R') {
            $('#slide-wrap').animate({
                scrollLeft: "+=" + 250 + "px"
            }, function(){
                // createCookie('scrollPos', $('#slide-wrap').scrollLeft());
                scrollArrowShow();
            });
        }
       }

Here is the code that you want.
It's proved that works on IE, Safari, Chrome, Firefox, etc.

Here is the HTML part.

    <div id="slide-wrap" style="width:1000px; height:200px; overflow:hidden; padding:0 auto;">
        <div id="inner-wrap" style="float:left;">
            <!-- 'Put Inline contains here like below.' -->
            <div class='containBox' style="width:250px; height:100%; float:left; display:inline-block;"></div>
            <!--  ...  -->
            <div class='containBox' style="width:250px; height:100%; float:left; display:inline-block;"></div>
            <!-- 'Put Inline contains here like above.' -->
        </div>
        <div style="display: block; width:40px; height:60px; position: absolute; margin-left:0px;   margin-top:40px">
            <img id='scroll_L_Arrow' src='../assets/img/l-arrow.png' onclick="scrollThumb('Go_L')"/>
        </div>
        <div style="display: block; width:40px; height:60px; position: absolute; margin-left:960px; margin-top:40px">
            <img id='scroll_R_Arrow' src='../assets/img/r-arrow.png' onclick="scrollThumb('Go_R')"/>
        </div>
    </div>

Here is jQuery part in JavaScript functions.

    function scrollArrowShow() {
        var maxScroll = ($('#inner-wrap').width() - $('#slide-wrap').scrollLeft()) - $('#slide-wrap').width();
        if ( 0 == $('#slide-wrap').scrollLeft()) {
            $('#scroll_L_Arrow').css({visibility: 'hidden'});
        }else{
            $('#scroll_L_Arrow').css({visibility: 'visible'});
        }
        if ( 0 == maxScroll) {
            $('#scroll_R_Arrow').css({visibility: 'hidden'});
        }else{
            $('#scroll_R_Arrow').css({visibility: 'visible'});
        }
    }

       function scrollThumb(direction) {
        if (direction=='Go_L') {
            $('#slide-wrap').animate({
                scrollLeft: "-=" + 250 + "px"
            }, function(){
                // createCookie('scrollPos', $('#slide-wrap').scrollLeft());
                scrollArrowShow();
            });
        }else
        if (direction=='Go_R') {
            $('#slide-wrap').animate({
                scrollLeft: "+=" + 250 + "px"
            }, function(){
                // createCookie('scrollPos', $('#slide-wrap').scrollLeft());
                scrollArrowShow();
            });
        }
       }
一腔孤↑勇 2024-11-13 13:09:23
$('.div-with-scrollbar').scroll(function () {
  var $elem = $('.div-with-scrollbar');
  var newScrollLeft = $elem.scrollLeft(),
      width = $elem.width(),
      scrollWidth = $elem.get(0).scrollWidth;
  var offset = 0;
  if (scrollWidth - newScrollLeft - width === offset) {
    alert('right end')
  }
  if (newScrollLeft === 0) {
    alert('left')
  }
});
$('.div-with-scrollbar').scroll(function () {
  var $elem = $('.div-with-scrollbar');
  var newScrollLeft = $elem.scrollLeft(),
      width = $elem.width(),
      scrollWidth = $elem.get(0).scrollWidth;
  var offset = 0;
  if (scrollWidth - newScrollLeft - width === offset) {
    alert('right end')
  }
  if (newScrollLeft === 0) {
    alert('left')
  }
});
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