From 2d96dd639993c85270ed8faf58ba38b2f3e06829 Mon Sep 17 00:00:00 2001
From: Matthias Kuhn <matthias@opengis.ch>
Date: Mon, 15 Jun 2020 15:03:22 +0200
Subject: [PATCH] Avoid binding loop in date time widget

---
 src/gui/editorwidgets/qgsdatetimeedit.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/gui/editorwidgets/qgsdatetimeedit.cpp b/src/gui/editorwidgets/qgsdatetimeedit.cpp
index 46fc99a4a1e8..3b37fb8b8efd 100644
--- a/src/gui/editorwidgets/qgsdatetimeedit.cpp
+++ b/src/gui/editorwidgets/qgsdatetimeedit.cpp
@@ -192,8 +192,12 @@ void QgsDateTimeEdit::showEvent( QShowEvent *event )
 
 void QgsDateTimeEdit::changed( const QDateTime &dateTime )
 {
-  mIsEmpty = false;
   bool isNull = dateTime.isNull();
+
+  if ( mIsNull == isNull && QgsDateTimeEdit::dateTime() == dateTime )
+    return;
+
+  mIsEmpty = false;
   if ( isNull != mIsNull )
   {
     mIsNull = isNull;