From ac256f05ff0f9aae575b175ba4e78ccbf6f8f292 Mon Sep 17 00:00:00 2001
From: AnyOldName3 <krizdjali+github@gmail.com>
Date: Wed, 22 Apr 2020 19:20:48 +0100
Subject: [PATCH] Close graphics context while it still exists

---
 extern/osgQt/GraphicsWindowQt.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/extern/osgQt/GraphicsWindowQt.cpp b/extern/osgQt/GraphicsWindowQt.cpp
index af963c04b5..aa9b4bbdb6 100644
--- a/extern/osgQt/GraphicsWindowQt.cpp
+++ b/extern/osgQt/GraphicsWindowQt.cpp
@@ -119,6 +119,13 @@ bool GLWidget::event( QEvent* event )
         enqueueDeferredEvent(QEvent::ParentChange);
         return true;
     }
+#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
+    else if (event->type() == QEvent::PlatformSurface && static_cast<QPlatformSurfaceEvent*>(event)->surfaceEventType() == QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed)
+    {
+        if (_gw)
+            _gw->close();
+    }
+#endif
 
     // perform regular event handling
     return QGLWidget::event( event );