Ng-mouseenter directive call the mouseDown($event) function which calculates X and Y cordinate that is assign to the ng-style of div element which will show the the circle on mouse enter in the div element.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.2/angular.min.js"></script>
<style>
.circle{
border-radius:50px;
}
</style>
</head>
<body ng-app="app">
<div ng-controller="controllerName">
<p>Mouse Enter on the square</p>
<div style="width:200px;height:200px; background-color:tomato;" ng-mouseenter="mouseDown($event)"></div>
<div class="circle" ng-style="{ 'backgroundColor':'green', 'margin-top':X+'px', 'margin-left':Y+'px',width:'50px',height:'50px' }" >
</div>
<pre ng-show="X">Mouse enter at:{{X}},{{Y}}</pre>
</div>
<script>
var app = angular.module("app", []);
app.controller('controllerName', ['$scope', function ($scope) {
$scope.mouseDown = function (event) {
$scope.X = event.clientX-100;
$scope.Y = event.clientY-100;
}
}]);
</script>
</body>
</html>
