鼠标悬停在多个td rowspan上

时间:2014-10-10 12:18:09

标签: jquery html css

我有一个包含多个td rowspan的表。鼠标悬停时,整个字母行应为红色。 例如,如果我们将鼠标放在任何字母值上,则整个字母表部分应显示为红色。数字的情况也是如此。

有一些jQuery来实现这一点,但无法获得整行字母或数字相同的颜色。 试试这个:http://jsfiddle.net/y3q2bs85/6/

HTML code:

<table>
    <tbody>
        <tr>
            <td rowspan="3">Alphabet</td>
            <td rowspan="2">a</td>
            <td>b</td>
            <td>c</td>
        </tr>
        <tr>
            <td>d</td>
            <td>e</td>
        </tr>
        <tr>
            <td>f</td>
            <td>g</td>
            <td>h</td>
        </tr>
        <tr>
            <td rowspan="3">Number</td>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
        <tr>
            <td>4</td>
            <td>5</td>
            <td>6</td>
        </tr>
        <tr>
            <td>7</td>
            <td>8</td>
            <td>9</td>
        </tr>
    </tbody>
</table>

CSS代码:

body {
    padding: 50px;
}
table {
    width: 100%;
    border-collapse: collapse;
}
td, th {
    padding: 20px;
    border: 1px solid black;
}
.hover {
    background: red;
}

jQuery代码:

$("td").hover(function() {
  $el = $(this);
  $el.parent().addClass("hover");

  if ($el.parent().has('td[rowspan]').length == 0)

    $el
      .parent()
      .prevAll('tr:has(td[rowspan]):first')
      .find('td[rowspan]')
      .addClass("hover");
}, function() { 

  $el
    .parent()
    .removeClass("hover")
    .prevAll('tr:has(td[rowspan]):first')
    .find('td[rowspan]')
    .removeClass("hover");

});

我们如何解决这个问题?

4 个答案:

答案 0 :(得分:6)

编辑:添加了查找每个块顶部的方法。

编辑2 - 事先做好工作再考虑一下这个问题,最好在开始时解决每个块中哪些行并将每个行存储在该列中,例如:每个字母行存储对包含行1-4的数组的引用。因此,当您悬停时,您只需要获取存储在父行中的行数组,并将类应用于这些行。

通过检查块顶行中的最大行距,您不能仅限于检查第一个单元格。在更新的代码中,我已将Alphabet移到中间以演示此内容并添加几个其他块来演示单行块的工作。

&#13;
&#13;
function findBlocks(theTable) {
    if ($(theTable).data('hasblockrows') == null) {
        console.log('findBlocks'); // to prove we only run this once

        // we will loop through the rows but skip the ones not in a block
        var rows = $(theTable).find('tr');
        for (var i = 0; i < rows.length;) {

            var firstRow = rows[i];

            // find max rowspan in this row - this represents the size of the block
            var maxRowspan = 1;
            $(firstRow).find('td').each(function () {
                var attr = parseInt($(this).attr('rowspan') || '1', 10)
                if (attr > maxRowspan) maxRowspan = attr;
            });

            // set to the index in rows we want to go up to
            maxRowspan += i;

            // build up an array and store with each row in this block
            // this is still memory-efficient, as we are just storing a pointer to the same array
            // ... which is also nice becuase we can build the array up in the same loop
            var blockRows = [];
            for (; i < maxRowspan; i++) {
                $(rows[i]).data('blockrows', blockRows);
                blockRows.push(rows[i]);
            }

            // i is now the start of the next block
        }

        // set data against table so we know it has been inited (for if we call it in the hover event)
        $(theTable).data('hasblockrows', 1);
    }
}

$("td").hover(function () {
    $el = $(this);
    //findBlocks($el.closest('table')); // you can call it here or onload as below
    $.each($el.parent().data('blockrows'), function () {
        $(this).find('td').addClass('hover');
    });
}, function () {
    $el = $(this);
    $.each($el.parent().data('blockrows'), function () {
        $(this).find('td').removeClass('hover');
    });
});

findBlocks($('table'));
&#13;
body {
    padding: 50px;
}
table {
    width: 100%;
    border-collapse: collapse;
}
td, th {
    padding: 20px;
    border: 1px solid black;
}
.hover {
    background: red;
}
&#13;
<table>
    <tbody>
        <tr>
            <td>Symbols</td>
            <td>+</td>
            <td>-</td>
            <td>*</td>
        </tr>
        <tr>
            <td rowspan="2">a</td>
            <td>b</td>
            <td rowspan="4">Alphabet</td>
            <td>c</td>
        </tr>
        <tr>
            <td>d</td>
            <td>e</td>
        </tr>
        <tr>
            <td rowspan="2">f</td>
            <td>g</td>
            <td>h</td>
        </tr>
        <tr>
            <td>i</td>
            <td>j</td>
        </tr>
        <tr>
            <td>Bitwise</td>
            <td>&amp;</td>
            <td>|</td>
            <td>^</td>
        </tr>
        <tr>
            <td rowspan="3">Number</td>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
        <tr>
            <td>4</td>
            <td>5</td>
            <td>6</td>
        </tr>
        <tr>
            <td>7</td>
            <td>8</td>
            <td>9</td>
        </tr>
    </tbody>
</table>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
&#13;
&#13;
&#13;

答案 1 :(得分:2)

试试这个

        $(function () {
        $("td").hover(function () {
            $el = $(this);
            $el.parent().addClass("hover");
            var tdIndex = $('tr').index($el.parent());
            if ($el.parent().has('td[rowspan]').length == 0) {
                $el.parent().prevAll('tr:has(td[rowspan]):first')
                        .find('td[rowspan]').filter(function () {
                            return checkRowSpan(this, tdIndex);
                        }).addClass("hover");
            }
        }, function () {
            $el.parent()
    .removeClass("hover")
    .prevAll('tr:has(td[rowspan]):first')
    .find('td[rowspan]')
    .removeClass("hover");

        });
    });
    function checkRowSpan(element, pIndex) {
        var rowSpan = parseInt($(element).attr('rowspan'));
        var cIndex = $('tr').index($(element).parent());
        return rowSpan >= pIndex + 1 || (cIndex + rowSpan) > pIndex;
    }

Fiddler here

答案 2 :(得分:1)

你的表结构是不规则的,所以很难找到一个选择器来选择视觉“行”,因为它跨越不同的行。一种解决方案是手动着色细胞,看看http://jsfiddle.net/2szxsfcs/2/

基本上你用相同的id标记要着色的行,然后使用jquery为所有相关的TR着色/取色:

<table>
  <tbody>
        <tr class="fullrow row1" data-id="1">
            <td rowspan="3">Alphabet</td>
            <td rowspan="2">a</td>
            <td>b</td>
            <td>c</td>
        </tr>
        <tr  class="fullrow row1" data-id="1">
            <td>d</td>
            <td>e</td>          
        </tr>
        <tr class="fullrow row1" data-id="1">
            <td>f</td>
            <td>g</td>
            <td>h</td>
        </tr>
        <tr class="fullrow row2" data-id="2">
            <td rowspan="3">Number</td>
            <td>1</td>
            <td>2</td>
            <td>3</td>
        </tr>
        <tr class="fullrow row2" data-id="2">
            <td>4</td>
            <td>5</td>
            <td>6</td>
        </tr>
        <tr class="fullrow row2" data-id="2">
            <td>7</td>
            <td>8</td>
            <td>9</td>
        </tr>   
    </tbody>
</table>

  $(".fullrow")
    .hover(function() {
        var id=this.getAttribute("data-id");
        // on hover, we get an "id", and all tr's that have class "row<id>" are the ones to color
        $(".row"+id).addClass("hovering"); 
    })
    .on ("blur mouseleave", function() {
      var id=this.getAttribute("data-id");
      $(".row"+id).removeClass("hovering"); 
    });

.hovering { background-color:red; }

答案 3 :(得分:0)

让我试试&lt; div&gt;办法。这解决了几个问题,但新问题已经解决了。

在这里摆弄:http://jsfiddle.net/cforcloud/3wj20bmL/
注意:这使用引导网格系统

找到内容单元格需要很少的jquery。没有孩子的div成为.cell

$('.row div').filter(function () {
    return $(this).children().length == 0;
})
    .addClass('cell')
    .hover(

function () {
    $(this).parent('.row')
        .addClass('sele');


}, function () {});