Add a behavior for exposing a mousemove event stream.

js/behaviors/behaviors.module.js

@@ -2,7 +2,10 @@
 
 var angular = require('angular');
 
+var mouseOverModule = require('./mouseOver/mouseOver');
+
 exports.moduleName = 'exp-ang.behaviors';
 
 angular.module(exports.moduleName, [
+	mouseOverModule.moduleName,
 ]);

js/behaviors/mouseOver/mouseOver.js

@@ -0,0 +1,22 @@
+'use strict';
+
+var angular = require('angular');
+var Rx = require('rx');
+
+exports.moduleName = 'exp-ang.behaviors.mouseOver';
+exports.directiveName = 'eaMouseOver';
+
+function mouseOverDirective() {
+	return {
+		restrict: 'A',
+		link: function(scope, element, attributes) {
+			var eventStream = Rx.Observable.fromEvent(element, 'mousemove');
+
+			// Use the value of the eaMouseOver attribute as the name to save to on the scope
+			scope[attributes.eaMouseOver] = eventStream;
+		},
+	};
+}
+
+angular.module(exports.moduleName, [])
+	.directive(exports.directiveName, mouseOverDirective);