模拟multiple select，实现不按ctrl单击选中以及拖动选择 #9

liusaint · 2017-10-09T11:36:50Z

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>使用ul,li模拟multiple select。实现拖拽多选，不按ctrl，单击选中</title>
    <link rel="stylesheet" href="select.css">
</head>
<body>
    <div class="title">原生select</div>
    <select name="" class="ori_select" multiple="">
        <option value="1">1</option>
        <option value="2">2</option>
        <option value="3">3</option>
        <option value="4">4</option>
        <option value="5">5</option>
        <option value="6">6</option>
        <option value="7">7</option>
        <option value="8">8</option>
        <option value="9">9</option>
        <option value="10">10</option>
        <option value="11">11</option>
        <option value="12">12</option>
        <option value="13">13</option>
        <option value="14">14</option>
        <option value="15">15</option>
    </select>
    <div class="title">模拟select</div>
    <ul class="ul_select">
        <li value="1">1</li>
        <li value="2">2</li>
        <li value="3">3</li>
        <li value="4">4</li>
        <li value="5">5</li>
        <li value="6">6</li>
        <li value="7">7</li>
        <li value="8">8</li>
        <li value="9">9</li>
        <li value="10">10</li>
        <li value="11">11</li>
        <li value="12">12</li>
        <li value="13">13</li>
        <li value="14">14</li>
        <li value="15">15</li>
    </ul>
    
    <script src="http://apps.bdimg.com/libs/jquery/1.8.1/jquery.min.js"></script>
    <script src="select.js"></script>
</body>
</html>

$(function() {
    
    /*模拟select功能　begin*/
    (function() {


        var $startLi, //移动的初始节点
        $currentLi, //移动的当前节点
        currentIndex, //当前节点的索引
        startIndex, //初始索引
        maxIndex, //本次移动的最大索引
        minIndex, //本次移动最小索引
        isMoving;//是否在移动中
        
        //避免重复绑定，先解绑事件。
        $('body').off('.ul_select_event');
        
        //数据同步。仅仅是从模拟的同步到原生的。
        function setSelectVal() {
            $(".ori_select").val('');
            $('.ul_select .choosed').each(function(index, el) {
                var val = $.trim($(this).attr('value'));
                $('.ori_select option[value="' + val + '"]').prop('selected', true);
            });
        }

        //不使用ctrl,单选的时候选中选项
        $("body").on('click.ul_select_event', '.ul_select li', function(event) {
            $(this).toggleClass('choosed');
            setSelectVal();
        });

        //鼠标按下去的事件。
        $("body").on('mousedown.ul_select', '.ul_select li', function(event) {
            
            //mousedown的时候，部分数据需要初始化。
            $startLi = $(this);
            startIndex = maxIndex = minIndex = $startLi.index();

            //延时一点。绑定。一定程度避免点击事件跟移动事件的冲突。
            setTimeout(function() {
                $(".ul_select li").on('mousemove', function(event) {

                    isMoving = true;

                    $currentLi = $(this);
                    currentIndex = $currentLi.index();

                    if (currentIndex > maxIndex) {
                        maxIndex = currentIndex;
                    }

                    if (currentIndex < minIndex) {
                        minIndex = currentIndex;
                    }

                    for (var i = minIndex; i <= maxIndex; i++) {
                        $('.ul_select li').eq(i).removeClass('choosed');
                    }
                   
                    if (currentIndex >= startIndex) {

                        for (var i = startIndex; i <= currentIndex; i++) {
                            $('.ul_select li').eq(i).addClass('choosed');
                        }

                    } else {                        

                        for (var i = startIndex; i >= currentIndex; i--) {
                            $('.ul_select li').eq(i).addClass('choosed');
                        }

                    }

                })
            }, 50)

        });

        //结束移动状态
        $("body").on('mouseup.ul_select_event', function(event) {
            $(".ul_select li").off('mousemove');
            if (isMoving) {
                isMoving = false;
                setSelectVal();
            }

        });

    })();
    /*模拟select功能　end*/
});

演示地址:http://runningls.com/demos/2017/ul_select/
完整代码:https://github.com/liusaint/JavaScript-record/tree/master/ul_select

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模拟multiple select，实现不按ctrl单击选中以及拖动选择 #9

模拟multiple select，实现不按ctrl单击选中以及拖动选择 #9

liusaint commented Oct 9, 2017 •

edited

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模拟multiple select，实现不按ctrl单击选中以及拖动选择 #9

模拟multiple select，实现不按ctrl单击选中以及拖动选择 #9

Comments

liusaint commented Oct 9, 2017 • edited Loading

liusaint commented Oct 9, 2017 •

edited

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