From 1d83e15e3fdaf3b768bf85f40bb3710b813003bc Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Thu, 9 Aug 2018 17:03:01 +0200
Subject: [PATCH] quit event loop after closing main window if not started by
 an extern host application

---
 src/Gui/Application.cpp | 1 +
 src/Gui/MainWindow.cpp  | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Gui/Application.cpp b/src/Gui/Application.cpp
index 0ede49bef5..7af9fc1f9c 100644
--- a/src/Gui/Application.cpp
+++ b/src/Gui/Application.cpp
@@ -1722,6 +1722,7 @@ void Application::runApplication(void)
 
     Application app(true);
     MainWindow mw;
+    mw.setProperty("QuitOnClosed", true);
 
     // allow to disable version number
     ParameterGrp::handle hGen = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/General");
diff --git a/src/Gui/MainWindow.cpp b/src/Gui/MainWindow.cpp
index 5623ea9da0..1fb02ee7fd 100644
--- a/src/Gui/MainWindow.cpp
+++ b/src/Gui/MainWindow.cpp
@@ -976,7 +976,8 @@ void MainWindow::closeEvent (QCloseEvent * e)
         }
 
         /*emit*/ mainWindowClosed();
-        qApp->quit(); // stop the event loop
+        if (this->property("QuitOnClosed").isValid())
+            qApp->quit(); // stop the event loop
     }
 }