Question

在jQuery数据表中，我有复选框列多选过滤器。我在每个过滤器的顶部都有一个'Select All / None'复选框。我可以选择所有复选框，但问题是我似乎无法将选择限制在活动容器中 - 换句话说，其他列中的所有复选框也会被检查。这个小提琴展示了我在基于研究其他帖子几个小时的基础上尝试过的一些替代方案，但我怀疑下拉菜单的结构在这种特殊情况下使事情变得复杂。任何想法？小提琴：https://jsfiddle.net/Lxytynm3/

    <table id="example" class="display" cellspacing="0" width="100%">
  <thead>
    <tr>
      <th>Name</th>
      <th>Position</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Tiger Nixon</td>
      <td>System Architect</td>
    </tr>
    <tr>
      <td>Garrett Winters</td>
      <td>Accountant</td>
    </tr>
    <tr>
      <td>Ashton Cox</td>
      <td>Junior Technical Author</td>
    </tr>
  </tbody>
</table>

    $(document).ready(function() {
  function cbDropdown(column) {
    return $('<ul>', {
      'class': 'cb-dropdown'
    }).appendTo($('<div>', {
      'class': 'cb-dropdown-wrap'
    }).appendTo(column));
  }

  $('#example').DataTable({
    initComplete: function() {
      this.api().columns().every(function() {
        var column = this;
        var ddmenu = cbDropdown($(column.header()))

          // -------------------------------------------------------

          .on('change', ':checkbox', function() {
            var active;
            var vals = $(':checked', ddmenu).map(function(index, element) {
              active = true;
              return $.fn.dataTable.util.escapeRegex($(element).val());
            }).toArray().join('|');

            column
              .search(vals.length > 0 ? '^(' + vals + ')$' : '', true, false)
              .draw();

            // -------------------------------------------------------
            // Highlight the current item if selected.
            if (this.checked) {
              $(this).closest('li').addClass('active');

              // If 'Select all / none' clicked ON
              if ($(this).val() === "1") {

                $('ul.cb-dropdown').find('input[type="checkbox"]').prop('checked', this.checked)
                //$(".cb-dropdown li").prop('checked', true);
                //$('.cb-dropdown').closest('li').find('input[type="checkbox"]').prop('checked', true);
                // $('this input[type="checkbox"]').prop('checked', true);    works!
                // $( 'input[type="checkbox"]' ).prop('checked', this.checked);
                // $(this).find('input[type="checkbox"]').prop('checked', this.checked)
                //$('div.cb-dropdown-wrap.active').children().find('input[type="checkbox"]').prop('checked', this.checked)

              }
            } else // 'Select all / none' clicked OFF

            {
              $(this).closest('li').removeClass('active');
              // test if select none
              if ($(this).val() === "1") {
                // code to untick all
              }
            }

            // Highlight the current filter if selected.
            var active2 = ddmenu.parent().is('.active');
            if (active && !active2) {
              ddmenu.parent().addClass('active');

              // Change Container title to "Filter on" and green
              //$(this).parent().find('.cb-dropdown li:nth-child(n+1)').css('color','red');   
              $('active2 li label:contains("Filter OFF")').text('Yeees');

            } else if (!active && active2) {
              ddmenu.parent().removeClass('active');
            }
          });

        // -------------------------------------------------------
        var mytopcount = '0'; // Counter that ensures only 1 entry per container

        // loop to assign all options in container filter
        column.data().unique().sort().each(function(d, j) {

          // Label
          var $label = $('<label>'),
            $text = $('<span>', {
              text: d
            }),

            // Checkbox
            $cb = $('<input>', {
              type: 'checkbox',
              value: d
            });


          $text.appendTo($label);
          $cb.appendTo($label);

          ddmenu.append($('<li>').append($label));


          // -----------------
          // Add 'Select all / none' to each dropdown container
          if (mytopcount == '0') // Counter that ensures only 1 entry per container
          {
            $label = $('<label>'), $text = $('<span>', {
                text: "Select all / none"
              }),

              $cb = $('<input>', {
                type: 'checkbox',
                value: 1
              });

            $text.prependTo($label).css('margin-bottom', '6px');
            $cb.prependTo($label);
            ddmenu.prepend($('<li>').prepend($label).css({
              'border-bottom': '1px solid grey',
              'margin-bottom': '6px'
            }));

            mytopcount = '1' // This stops this section running again in container 

          }

        });

      });
    }
  });

});

.cb-dropdown-wrap {
  max-height: 80px;
  position: relative;
  height: 219px;
  /* Temporary to fix dropdown */
}

.cb-dropdown,
.cb-dropdown li {
  margin: 0;
  padding: 0;
  list-style: none;
  transition: 0.2s 0.23s height ease-in-out;
}

.cb-dropdown {
  position: absolute;
  z-index: 1;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: white;
  border: 1px solid red;
}

.cb-dropdown-wrap:hover .cb-dropdown {
  height: 100px;
  overflow: auto;
  transition: 0.15s 0.1s height ease-in-out;
}

.cb-dropdown li.active {
  background: lightgreen;
}

.cb-dropdown li label {
  display: block;
  position: relative;
  cursor: pointer;
  line-height: 19px;
}

.cb-dropdown li label>input {
  position: absolute;
  left: 0;
  top: 0;
  width: 16px;
}

.cb-dropdown li label>span {
  display: block;
  margin-left: 24px;
  /* At least, width of the checkbox. */
  font-family: sans-serif;
  font-size: 12px;
  font-weight: normal;
  text-align: left;
}

.cb-dropdown li:hover {
  background: lightgrey;
}

table.dataTable thead .sorting,
table.dataTable thead .sorting_asc,
table.dataTable thead .sorting_desc,
table.dataTable thead .sorting_asc_disabled,
table.dataTable thead .sorting_desc_disabled {
  background-position: 100% 10px;
}

Answer 1

您已经拥有包含变量ddmenu

中的复选框的对象

而不是：

$('ul.cb-dropdown').find('input[type="checkbox"]').prop('checked', this.checked)

使用此：

$(ddmenu).find('input[type="checkbox"]').prop('checked', this.checked)

不要忘记添加代码来解开它们：

$(ddmenu).find('input[type="checkbox"]').prop('checked', false)

请参阅：https://jsfiddle.net/Lxytynm3/2/

在jquery datatable列过滤器

1 个答案: