From daaf895c3b1400eeea1ddda232d5fb263d630bc4 Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Fri, 22 Sep 2017 04:31:55 +0200
Subject: [PATCH] Utility function to change window flags

---
 src/blackgui/guiapplication.cpp | 19 +++++++++++++++++++
 src/blackgui/guiapplication.h   |  3 +++
 2 files changed, 22 insertions(+)

diff --git a/src/blackgui/guiapplication.cpp b/src/blackgui/guiapplication.cpp
index 89a094a7a..ecbb8d9cf 100644
--- a/src/blackgui/guiapplication.cpp
+++ b/src/blackgui/guiapplication.cpp
@@ -19,6 +19,7 @@
 #include "blackgui/guiapplication.h"
 #include "blackgui/guiutility.h"
 #include "blackgui/registermetadata.h"
+#include "blackmisc/slot.h"
 #include "blackmisc/directoryutils.h"
 #include "blackmisc/datacache.h"
 #include "blackmisc/logcategory.h"
@@ -194,6 +195,24 @@ namespace BlackGui
         emit uiObjectTreeReady();
     }
 
+    void CGuiApplication::addWindowFlags(Qt::WindowFlags flags)
+    {
+        QWidget *maw = this->mainApplicationWindow();
+        if (maw)
+        {
+            Qt::WindowFlags windowFlags = maw->windowFlags();
+            windowFlags |= flags;
+            maw->setWindowFlags(windowFlags);
+        }
+        else
+        {
+            connectOnce(this, &CGuiApplication::uiObjectTreeReady, this, [ = ]
+            {
+                this->addWindowFlags(flags);
+            });
+        }
+    }
+
     void CGuiApplication::setWindowIcon(const QPixmap &icon)
     {
         instance()->m_windowIcon = icon;
diff --git a/src/blackgui/guiapplication.h b/src/blackgui/guiapplication.h
index 2fca4242e..8cc29fb21 100644
--- a/src/blackgui/guiapplication.h
+++ b/src/blackgui/guiapplication.h
@@ -111,6 +111,9 @@ namespace BlackGui
         //! Init the main application window based on information in this application
         void initMainApplicationWindow(QWidget *mainWindow);
 
+        //! Set window flag on main application window
+        void addWindowFlags(Qt::WindowFlags flags);
+
         //! \name print messages generated during parsing / cmd handling
         //! @{
         virtual bool cmdLineErrorMessage(const QString &cmdLineErrorMessage, bool retry = false) const override;