From 7da57e0aa500cdd7515dfdf85716eac92818f54c Mon Sep 17 00:00:00 2001
From: Mitsuhiro Tanda <mitsuhiro.tanda@gmail.com>
Date: Wed, 2 Mar 2016 13:15:35 +0900
Subject: [PATCH] align refresh interval

---
 public/app/features/dashboard/timeSrv.js               | 10 ++++++++--
 public/app/features/dashboard/timepicker/dropdown.html |  1 +
 public/app/features/dashboard/timepicker/timepicker.ts |  2 +-
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/public/app/features/dashboard/timeSrv.js b/public/app/features/dashboard/timeSrv.js
index 62d7b8c591e..b0e89e32590 100644
--- a/public/app/features/dashboard/timeSrv.js
+++ b/public/app/features/dashboard/timeSrv.js
@@ -65,11 +65,17 @@ define([
       }
     };
 
-    this.setAutoRefresh = function (interval) {
+    this.setAutoRefresh = function (interval, align) {
       this.dashboard.refresh = interval;
       if (interval) {
         var _i = kbn.interval_to_ms(interval);
-        this.start_scheduled_refresh(_i);
+        var wait_ms = 0;
+        if (align) {
+          wait_ms = _i - (Date.now() % _i);
+        }
+        $timeout(function () {
+          self.start_scheduled_refresh(_i);
+        }, wait_ms);
       } else {
         this.cancel_scheduled_refresh();
       }
diff --git a/public/app/features/dashboard/timepicker/dropdown.html b/public/app/features/dashboard/timepicker/dropdown.html
index 8b6d0c24a0c..7e40b055e9b 100644
--- a/public/app/features/dashboard/timepicker/dropdown.html
+++ b/public/app/features/dashboard/timepicker/dropdown.html
@@ -40,6 +40,7 @@
 			<div class="gf-form max-width-28">
 				<select ng-model="ctrl.refresh.value" class="gf-form-input input-medium" ng-options="f.value as f.text for f in ctrl.refresh.options"></select>
 			</div>
+			<editor-checkbox text="Align" model="ctrl.refresh.align"></editor-checkbox>
 			<div class="gf-form">
 				<button type="submit" class="btn gf-form-btn btn-secondary" ng-click="ctrl.applyCustom();" ng-disabled="!timeForm.$valid">Apply</button>
 			</div>
diff --git a/public/app/features/dashboard/timepicker/timepicker.ts b/public/app/features/dashboard/timepicker/timepicker.ts
index 453eaaf3204..b0eb93fe894 100644
--- a/public/app/features/dashboard/timepicker/timepicker.ts
+++ b/public/app/features/dashboard/timepicker/timepicker.ts
@@ -109,7 +109,7 @@ export class TimePickerCtrl {
 
   applyCustom() {
     if (this.refresh.value !== this.dashboard.refresh) {
-      this.timeSrv.setAutoRefresh(this.refresh.value);
+      this.timeSrv.setAutoRefresh(this.refresh.value, this.refresh.align);
     }
 
     this.timeSrv.setTime(this.timeRaw, true);