From 9e3e0a81a07b24ecfe9a57c00be965d9cdf66cd7 Mon Sep 17 00:00:00 2001
From: sp-kilobug <sp-kilobug@users.noreply.github.com>
Date: Sat, 27 Jun 2015 17:04:20 +0200
Subject: [PATCH] improves the fallback mode fluidity

_emulateDragOver optimized to reduce the interval tics.
That provides a fluidity similar to the native drag and drop mode.
---
 Sortable.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Sortable.js b/Sortable.js
index a2477f6..6b246d3 100644
--- a/Sortable.js
+++ b/Sortable.js
@@ -398,6 +398,12 @@
 
 		_emulateDragOver: function () {
 			if (touchEvt) {
+				if (this._lastX===touchEvt.clientX && this._lastY===touchEvt.clientY ) {
+					return;
+				}
+				this._lastX=touchEvt.clientX;
+				this._lastY=touchEvt.clientY;
+
 				_css(ghostEl, 'display', 'none');
 
 				var target = document.elementFromPoint(touchEvt.clientX, touchEvt.clientY),
@@ -510,7 +516,7 @@
 					_on(document, 'mouseup', this._onDrop);
 				}
 
-				this._loopId = setInterval(this._emulateDragOver, 150);
+				this._loopId = setInterval(this._emulateDragOver, 50);
 			}
 			else {
 				if (dataTransfer) {