From 0fa6a6e4c36c6d35c498963d82208b73aea76ad3 Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Fri, 17 Apr 2020 19:02:37 +0200
Subject: [PATCH] Ref T786, singleShot for CSlot

---
 src/blackmisc/slot.h | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/blackmisc/slot.h b/src/blackmisc/slot.h
index 67e8a8d60..d83b4afed 100644
--- a/src/blackmisc/slot.h
+++ b/src/blackmisc/slot.h
@@ -11,14 +11,17 @@
 #ifndef BLACKMISC_SLOT_H
 #define BLACKMISC_SLOT_H
 
+#include "blackmisc/invoke.h"
+
 #include <QPointer>
 #include <QObject>
 #include <QtGlobal>
+#include <QTimer>
+
 #include <atomic>
 #include <functional>
 #include <future>
 #include <memory>
-#include "blackmisc/invoke.h"
 
 namespace BlackMisc
 {
@@ -100,6 +103,19 @@ namespace BlackMisc
             return m_function(args...);
         }
 
+        //! Call function "de-coupled" in original thread
+        bool singleShot(Args... args) const
+        {
+            // does NOT return the values of m_function!
+            if (!m_object || !m_function) { return false; }
+            QTimer::singleShot(0, m_object.data(), [ = ]
+            {
+                if (!m_object || !m_function) { return; }
+                m_function(args...);
+            });
+            return true;
+        }
+
         //! Returns the object which the slot belongs to.
         //! Use this as the third argument to QObject::connect to ensure the slot is called in the correct thread.
         QObject *object() const