>>Bear in mind that simply setting an inputs $dirty to false (even when there are no other dirty controls) will not cause the form $dirty to be re-evaluated. You may need something like this in your directive after $setPristine():

var dirty = false;
>>angular.forEach(scope.theForm, function (value, key) {
>>    if (key[0] != '$') {
>>        if (value.$dirty) {
>>                dirty = true;
>>        }
>>    }
>>});
>>if (!dirty) {
>>scope.theForm.$setPristine();
>>}

This will reset the form if all inputs are pristine.....
>>
>
>For this code to work do I need to add
>

>require: ['^form'],

>
>and use scope.form syntax where you used scope.theForm
>
>?

This, although a bit messy, seems to work:

                      var dirty = false;
                       var theForm = null;
                       angular.forEach(scope.theForm, function (value, key) {
                           if (key == '$$parentForm') {
                               theForm = value;
                           }
                           if (key[0] != '$') {
                               if (value.$dirty) {
                                   dirty = true;
                               }
                           }
                       });
                       if (!dirty) {
                           theForm.$setPristine();
                       }

(Uses the control to reach up to the parent form)