Fixed #1683: implemented `currentTimeTick` event

HISTORY.md

@@ -6,6 +6,7 @@ http://visjs.org
 
 ### Timeline
 
+- Implemented `currentTimeTick` event (see #1683).
 - Fixed #1630: method `getItemRange` missing in docs.
 
 ### Graph2d

docs/graph2d/index.html

@@ -1304,6 +1304,12 @@ Graph2d.off('rangechanged', onChange);
             <th>Properties</th>
             <th>Description</th>
         </tr>
+
+        <tr>
+            <td>currentTimeTick</td>
+            <td>Fired when the current time bar redraws. The rate depends on the zoom level.</td>
+        </tr>
+
         <tr>
             <td>click</td>
             <td>

docs/timeline/index.html

@@ -1348,6 +1348,11 @@ timeline.off('select', onSelect);
       <th>Description</th>
     </tr>
 
+    <tr>
+      <td>currentTimeTick</td>
+      <td>Fired when the current time bar redraws. The rate depends on the zoom level.</td>
+    </tr>
+
     <tr>
       <td>click</td>
       <td>

lib/timeline/component/CurrentTime.js

@@ -129,6 +129,7 @@ CurrentTime.prototype.start = function() {
     if (interval > 1000) interval = 1000;
 
     me.redraw();
+    me.body.emitter.emit('currentTimeTick');
 
     // start a renderTimer to adjust for the new time
     me.currentTimeTimer = setTimeout(update, interval);

test/timeline.html

@@ -216,6 +216,10 @@
   items.on('update', console.log.bind(console));
   items.on('remove', console.log.bind(console));
 
+  timeline.on('currentTimeTick', function () {
+    console.log('currentTimeTick')
+  });
+
 
 //  timeline.setOptions({timeAxis:{scale: 'minute', step: 5}})
 </script>