fixed moveTo, fit and setWindow. Improved animation smoothness

lib/timeline/DateUtil.js

@@ -32,6 +32,7 @@ exports.convertHiddenOptions = function(body, hiddenDates) {
     }
   }
 
+  // allowing multiple input formats
   var periodicHiddenDates = hiddenDates.periodic;
   if (periodicHiddenDates) {
     if (periodicHiddenDates.times) {
@@ -124,7 +125,10 @@ exports.updateHiddenDates = function (body, hiddenDates) {
         }
       }
     }
+    // remove duplicates, merge where possible
     exports.removeDuplicates(body);
+
+    // ensure the new positions are not on hidden dates
     var startHidden = exports.isHidden(body.range.start, body.hiddenDates);
     var endHidden = exports.isHidden(body.range.end,body.hiddenDates);
     var rangeStart = body.range.start;
@@ -342,19 +346,19 @@ exports.snapAwayFromHidden = function(hiddenTimes, range, start, end, delta, zoo
       newDates = true;
       // start from left, snap to right
       if (range.previousDelta - delta > 0 && zoom == false || zoom == true && range.previousDelta - delta < 0) { // from the left
-        newStart = endDate + 1;
+        newStart = endDate + (start - startDate) + 1; // transfer the distance to the other side
       }
       else { // start from right, snap to left
-        newStart = startDate - 1;
+        newStart = startDate - (endDate - start) - 1; // transfer the distance to the other side
       }
     }
     if (end >= startDate && end < endDate) { // if the end is entering a hidden zone
       newDates = true;
       if (range.previousDelta - delta < 0) { //  end from right, snap to left
-        newEnd = startDate - 1;
+        newEnd = startDate - (endDate - end) - 1;
       }
       else { // end from left, snap to right
-        newEnd = endDate + 1;
+        newEnd = endDate + (end - startDate) + 1;
       }
     }
   }

lib/timeline/Range.js

@@ -133,7 +133,7 @@ Range.prototype.setRange = function(start, end, animate) {
         var e = (done || _end === null)   ? _end   : util.easeInOutQuad(time, initEnd, _end, duration);
 
         changed = me._applyRange(s, e);
-        DateUtil.updateHiddenDates(this.body, this.options.hiddenDates);
+        DateUtil.updateHiddenDates(me.body, me.options.hiddenDates);
         anyChanged = anyChanged || changed;
         if (changed) {
           me.body.emitter.emit('rangechange', {start: new Date(me.start), end: new Date(me.end)});