1 files changed, 48 insertions, 9 deletions

diff --git a/src/ng/directive/form.js b/src/ng/directive/form.js
index c5e39cde..4e6ec20d 100644
--- a/src/ng/directive/form.js
+++ b/src/ng/directive/form.js
@@ -46,8 +46,8 @@ var nullFormCtrl = {
  *
  */
 //asks for $scope to fool the BC controller module
-FormController.$inject = ['$element', '$attrs', '$scope'];
-function FormController(element, attrs) {
+FormController.$inject = ['$element', '$attrs', '$scope', '$animate'];
+function FormController(element, attrs, $scope, $animate) {
   var form = this,
       parentForm = element.parent().controller('form') || nullFormCtrl,
       invalidCount = 0, // used to easily determine if we are valid
@@ -70,9 +70,8 @@ function FormController(element, attrs) {
   // convenience method for easy toggling of classes
   function toggleValidCss(isValid, validationErrorKey) {
     validationErrorKey = validationErrorKey ? '-' + snake_case(validationErrorKey, '-') : '';
-    element.
-      removeClass((isValid ? INVALID_CLASS : VALID_CLASS) + validationErrorKey).
-      addClass((isValid ? VALID_CLASS : INVALID_CLASS) + validationErrorKey);
+    $animate.removeClass(element, (isValid ? INVALID_CLASS : VALID_CLASS) + validationErrorKey);
+    $animate.addClass(element, (isValid ? VALID_CLASS : INVALID_CLASS) + validationErrorKey);
   }
 
   /**
@@ -173,7 +172,8 @@ function FormController(element, attrs) {
    * state (ng-dirty class). This method will also propagate to parent forms.
    */
   form.$setDirty = function() {
-    element.removeClass(PRISTINE_CLASS).addClass(DIRTY_CLASS);
+    $animate.removeClass(element, PRISTINE_CLASS);
+    $animate.addClass(element, DIRTY_CLASS);
     form.$dirty = true;
     form.$pristine = false;
     parentForm.$setDirty();
@@ -194,7 +194,8 @@ function FormController(element, attrs) {
    * saving or resetting it.
    */
   form.$setPristine = function () {
-    element.removeClass(DIRTY_CLASS).addClass(PRISTINE_CLASS);
+    $animate.removeClass(element, DIRTY_CLASS);
+    $animate.addClass(element, PRISTINE_CLASS);
     form.$dirty = false;
     form.$pristine = true;
     forEach(controls, function(control) {
@@ -249,6 +250,8 @@ function FormController(element, attrs) {
  *  - `ng-pristine` is set if the form is pristine.
  *  - `ng-dirty` is set if the form is dirty.
  *
+ * Keep in mind that ngAnimate can detect each of these classes when added and removed.
+ *
  *
  * # Submitting a form and preventing the default action
  *
@@ -282,15 +285,48 @@ function FormController(element, attrs) {
  * @param {string=} name Name of the form. If specified, the form controller will be published into
  *                       related scope, under this name.
  *
+ * ## Animation Hooks
+ *
+ * Animations in ngForm are triggered when any of the associated CSS classes are added and removed. These
+ * classes are: `.pristine`, `.dirty`, `.invalid` and `.valid` as well as any other validations that
+ * are performed within the form. Animations in ngForm are similar to how they work in ngClass and
+ * animations can be hooked into using CSS transitions, keyframes as well as JS animations.
+ *
+ * The following example shows a simple way to utilize CSS transitions to style a form element
+ * that has been rendered as invalid after it has been validated:
+ *
+ * <pre>
+ * //be sure to include ngAnimate as a module to hook into more
+ * //advanced animations
+ * .my-form {
+ *   transition:0.5s linear all;
+ *   background: white;
+ * }
+ * .my-form.ng-invalid {
+ *   background: red;
+ *   color:white;
+ * }
+ * </pre>
+ *
  * @example
-    <example>
+    <example deps="angular-animate.js" animations="true" fixBase="true">
       <file name="index.html">
        <script>
          function Ctrl($scope) {
            $scope.userType = 'guest';
          }
        </script>
-       <form name="myForm" ng-controller="Ctrl">
+       <style>
+        .my-form {
+          -webkit-transition:all linear 0.5s;
+          transition:all linear 0.5s;
+          background: transparent;
+        }
+        .my-form.ng-invalid {
+          background: red;
+        }
+       </style>
+       <form name="myForm" ng-controller="Ctrl" class="my-form">
          userType: <input name="input" ng-model="userType" required>
          <span class="error" ng-show="myForm.input.$error.required">Required!</span><br>
          <tt>userType = {{userType}}</tt><br>
@@ -322,6 +358,9 @@ function FormController(element, attrs) {
         });
       </file>
     </example>
+ *
+ * @param {string=} name Name of the form. If specified, the form controller will be published into
+ *                       related scope, under this name.
  */
 var formDirectiveFactory = function(isNgForm) {
   return ['$timeout', function($timeout) {