From ec6ef0160089de37da5231183d72adb82ea9dc9b Mon Sep 17 00:00:00 2001
From: "Anthony J. Thibault" <tony@highfidelity.io>
Date: Tue, 28 Mar 2017 09:53:00 -0700
Subject: [PATCH] Mark the system TabletProxy object as Cpp ownership.

This should prevent the problem where the QML engine erroneously thinks the QObject has been collected/destroyed.
---
 interface/src/ui/overlays/Web3DOverlay.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/interface/src/ui/overlays/Web3DOverlay.cpp b/interface/src/ui/overlays/Web3DOverlay.cpp
index ae8755910b..36ad207521 100644
--- a/interface/src/ui/overlays/Web3DOverlay.cpp
+++ b/interface/src/ui/overlays/Web3DOverlay.cpp
@@ -17,6 +17,7 @@
 #include <QtGui/QOpenGLContext>
 #include <QtQuick/QQuickItem>
 #include <QtQml/QQmlContext>
+#include <QtQml/QQmlEngine>
 
 #include <AbstractViewStateInterface.h>
 #include <gpu/Batch.h>
@@ -197,6 +198,10 @@ void Web3DOverlay::loadSourceURL() {
             _webSurface->getRootContext()->setContextProperty("pathToFonts", "../../");
             tabletScriptingInterface->setQmlTabletRoot("com.highfidelity.interface.tablet.system", _webSurface->getRootItem(), _webSurface.data());
 
+            // mark the TabletProxy object as cpp ownership.
+            QObject* tablet = tabletScriptingInterface->getTablet("com.highfidelity.interface.tablet.system");
+            _webSurface->getRootContext()->engine()->setObjectOwnership(tablet, QQmlEngine::CppOwnership);
+
             // Override min fps for tablet UI, for silky smooth scrolling
             setMaxFPS(90);
         }