From 36ff1f5b6435c6d1285983053efc8b633ff39638 Mon Sep 17 00:00:00 2001
From: jos <wjosdejong@gmail.com>
Date: Wed, 21 May 2014 11:03:13 +0200
Subject: [PATCH] Some tweaks in snapping dragged items to nice dates.

---
 HISTORY.md               |  9 +++++++--
 src/timeline/TimeStep.js | 16 ++++++++++++++--
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/HISTORY.md b/HISTORY.md
index c427513b..e2e28c90 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,11 +2,16 @@
 http://visjs.org
 
 
-## 2014-05-09, version 1.0.2
+## not yet released, version 1.0.2
+
+### Timeline
+
+- Some tweaks in snapping dragged items to nice dates.
+
 
 ### Graph
 
-- changes setOptions to avoid resetting view.
+- Changes setOptions to avoid resetting view.
 
 
 ## 2014-05-09, version 1.0.1
diff --git a/src/timeline/TimeStep.js b/src/timeline/TimeStep.js
index 958a3a5f..febe04fc 100644
--- a/src/timeline/TimeStep.js
+++ b/src/timeline/TimeStep.js
@@ -314,8 +314,7 @@ TimeStep.prototype.snap = function(date) {
     clone.setSeconds(0);
     clone.setMilliseconds(0);
   }
-  else if (this.scale == TimeStep.SCALE.DAY ||
-      this.scale == TimeStep.SCALE.WEEKDAY) {
+  else if (this.scale == TimeStep.SCALE.DAY) {
     //noinspection FallthroughInSwitchStatementJS
     switch (this.step) {
       case 5:
@@ -328,6 +327,19 @@ TimeStep.prototype.snap = function(date) {
     clone.setSeconds(0);
     clone.setMilliseconds(0);
   }
+  else if (this.scale == TimeStep.SCALE.WEEKDAY) {
+    //noinspection FallthroughInSwitchStatementJS
+    switch (this.step) {
+      case 5:
+      case 2:
+        clone.setHours(Math.round(clone.getHours() / 12) * 12); break;
+      default:
+        clone.setHours(Math.round(clone.getHours() / 6) * 6); break;
+    }
+    clone.setMinutes(0);
+    clone.setSeconds(0);
+    clone.setMilliseconds(0);
+  }
   else if (this.scale == TimeStep.SCALE.HOUR) {
     switch (this.step) {
       case 4: