Add the ability to hide correctness markers

with a custom message for when they submit something.

common/lib/capa/capa/inputtypes.py

@@ -366,6 +366,12 @@ class ChoiceGroup(InputTypeBase):
 
         self.choices = self.extract_choices(self.xml)
 
+    @classmethod
+    def get_attributes(cls):
+        return [Attribute("show_correctness", "always"),
+                Attribute("submitted_message", "Answer received.")]
+
+
     def _extra_context(self):
         return {'input_type': self.html_input_type,
                 'choices': self.choices,

common/lib/capa/capa/templates/choicegroup.html

 <form class="choicegroup capa_inputtype" id="inputtype_${id}">
     <div class="indicator_container">
     % if input_type == 'checkbox' or not value:
-        % if status == 'unsubmitted':
+        % if status == 'unsubmitted' or show_correctness == 'never':
         <span class="unanswered" style="display:inline-block;" id="status_${id}"></span>
         % elif status == 'correct': 
         <span class="correct" id="status_${id}"></span>
@@ -26,7 +26,7 @@
                 else:
                     correctness = None
             %>
-            % if correctness:
+            % if correctness and not show_correctness=='never':
             class="choicegroup_${correctness}"
             % endif
             % endif
@@ -41,4 +41,7 @@
         <span id="answer_${id}"></span>
     </fieldset>
 
+    % if show_correctness == "never" and (value or status not in ['unsubmitted']):
+    <div class="capa_alert">${submitted_message}</div>
+    %endif
 </form>