AngularJs复选框函数

当复选框的值为true时，我想将背景色更改为浅蓝色，当值为false时，将背景色更改为正常

<tr ng-repeat="item in rows | filter:search" ng-class="{'selected':$index == selectedRow}">

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这里有一个带示例的plunker：

这是表格：

<table style="width:100%">
<tr ng-repeat="item in rows | filter:search" ng-class="{'selected': item.selected}">
  <td>
    <input type="checkbox" ng-model= "item.selected" ng-click="setClickedRow($index)">
  </td>
</tr>
</table>

<table style="width:100%">
<tr ng-repeat="item in rows | filter:search" ng-class="{'selected': item.selected}">
  <td>
    <input type="checkbox" ng-model= "item.selected" ng-click="setClickedRow($index)">
  </td>
</tr>
</table>