Experiment: add "teacher helped" link to Prolog screen

Records a {'typ': 'experiment', 'data': 'teacher help'} action when
clicked. This will allow us to consider such traces specially when
evaluating different hint types.

This is specific to the prolog_hints experiment and should be reverted
or generalized in the future.

1 files changed, 18 insertions, 0 deletions

diff --git a/js/codeq/prolog.js b/js/codeq/prolog.js
index 7cf9592..6e07784 100644
--- a/js/codeq/prolog.js
+++ b/js/codeq/prolog.js
@@ -28,6 +28,10 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
         jqAllButtons = jqBtnPlan.add(jqBtnTest), // all the buttons
         prologHandler;
 
+    // experiment: Prolog hints
+    var jqTeacherHelp = jqScreen.find('.teacher-help');
+    // end of experiment: Prolog hints
+
     var enterFun = function(problemDef, commonDef, currentSolution) {
         $('#navigation-problem-list').css('display', '');
         var navigationProlog = $("#navigation-prolog");
@@ -55,6 +59,11 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
                 .done();
         },
         'exit': function () {
+            // experiment: Prolog hints
+            jqTeacherHelp.find('a').off('click');
+            jqTeacherHelp.hide();
+            // end of experiment: Prolog hints
+
             jqAllButtons.off(); // unregister all event handlers
             jqAllQuadrants.off();
             jqScreen.css('display', 'none');
@@ -250,6 +259,15 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */
             .done();
         });
 
+        // experiment: Prolog hints
+        jqTeacherHelp.find('a').on('click', function(e) {
+            e.preventDefault();
+            activityHandler.queueTrace({'typ': 'experiment', 'data': 'teacher help'});
+            jqTeacherHelp.hide();
+        });
+        jqTeacherHelp.show();
+        // end of experiment: Prolog hints
+
         codeq.comms.loadProblem(problemDef.id).done();
         activityHandler.queueTrace({
             'typ': 'open',