var app = angular.module('app', ['ngTouch', 'ui.grid']);

app.controller('MainCtrl', ['$scope', function($scope) {

  $scope.myData = [{
    "firstName": "Cox",
    "lastName": "Carney",
    "company": "Enormo",
    "employed": true
  }, {
    "firstName": "Lorraine",
    "lastName": "Wise",
    "company": "Comveyer",
    "employed": false
  }, {
    "firstName": "Nancy",
    "lastName": "Waters",
    "company": "Fuelton",
    "employed": false
  }];

  // Here row is the scope of the row which the mouse is under. 
  // TODO: highlight other cells in the row from this.
  $scope.onRowHover = function(row) {
    console.log(row);
  }
}]);
.grid {
  width: 500px;
  height: 250px;
}
<!doctype html>
<html ng-app="app">

<head>
  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.3/angular.js"></script>
  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.3/angular-touch.js"></script>
  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.3/angular-animate.js"></script>
  <script src="http://ui-grid.info/docs/grunt-scripts/csv.js"></script>
  <script src="http://ui-grid.info/docs/grunt-scripts/pdfmake.js"></script>
  <script src="http://ui-grid.info/docs/grunt-scripts/vfs_fonts.js"></script>
  <script src="http://ui-grid.info/release/ui-grid.js"></script>
  <link rel="stylesheet" href="http://ui-grid.info/release/ui-grid.css" type="text/css">
  <link rel="stylesheet" href="main.css" type="text/css">
</head>

<body>

  <div ng-controller="MainCtrl">
    <div id="grid1" ui-grid="{ data: myData, rowTemplate:'rowTemplate.html' }" class="grid"></div>
  </div>


  <script src="app.js"></script>
</body>

</html>
<!--
  This div is copied from the default row template. I have added the ng-mouseover
  and ng-mouseleave events to highlight it red. 
-->
<div ng-mouseover="rowStyle={'background-color': 'red'}; grid.appScope.onRowHover(this);" ng-mouseleave="rowStyle={}">
<div  ng-style="rowStyle" ng-repeat="(colRenderIndex, col) in colContainer.renderedColumns track by col.uid" ui-grid-one-bind-id-grid="rowRenderIndex + '-' + col.uid + '-cell'"
class="ui-grid-cell" ng-class="{ 'ui-grid-row-header-cell': col.isRowHeader }" role="{{col.isRowHeader ? 'rowheader' : 'gridcell'}}" ui-grid-cell>
</div></div>