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diff --git a/src/runtime/Qt3DSActivationManager.h b/src/runtime/Qt3DSActivationManager.h
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+/****************************************************************************
+**
+** Copyright (C) 2013 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#pragma once
+#ifndef QT3DS_ACTIVATION_MANAGER_H
+#define QT3DS_ACTIVATION_MANAGER_H
+#include "foundation/Qt3DSRefCounted.h"
+#include "EASTL/string.h"
+#include "foundation/Qt3DSAllocator.h"
+#include "foundation/Utils.h"
+#include "Qt3DSKernelTypes.h"
+#include "Qt3DSMetadata.h"
+#include "foundation/Qt3DSDataRef.h"
+#include "foundation/Qt3DSFoundation.h"
+#include "Qt3DSTimePolicy.h"
+
+namespace Q3DStudio {
+struct IComponentTimeOverrideFinishedCallback;
+struct SComponentTimePolicyOverride;
+class CPresentation;
+}
+
+namespace qt3ds {
+namespace foundation {
+    class IPerfTimer;
+}
+}
+
+namespace qt3ds {
+namespace render {
+    class IThreadPool;
+}
+}
+
+namespace qt3ds {
+namespace runtime {
+    using namespace qt3ds::foundation;
+    using namespace qt3ds;
+    using Q3DStudio::CTimePolicy;
+    using Q3DStudio::SComponentTimePolicyOverride;
+    using Q3DStudio::IComponentTimeOverrideFinishedCallback;
+    using Q3DStudio::CPresentation;
+    using Q3DStudio::TTimeUnit;
+    using qt3ds::render::IThreadPool;
+
+    class IActivationManager;
+
+    typedef element::SElement &TActivityItem;
+    typedef element::SElement *TActivityItemPtr;
+
+    typedef eastl::pair<element::SElement *, QT3DSU32> TElementAndSortKey;
+
+    typedef NVConstDataRef<TElementAndSortKey> TActivityItemBuffer;
+
+    // Items can have user active and time active.  Time active is controlled by this object
+    // but user active can be set.  An item is only active if it both actives are true.
+    // Inactive items have completely inactive children.
+    class IActivityZone
+    {
+    protected:
+        virtual ~IActivityZone() {}
+    public:
+        virtual Q3DStudio::CPresentation &GetPresentation() = 0;
+
+        // Items activated this cycle
+        virtual TActivityItemBuffer GetActivatedItems() = 0;
+        // Items deactivated this cycle
+        virtual TActivityItemBuffer GetDeactivatedItems() = 0;
+        // All active items that are script enabled.
+        virtual TActivityItemBuffer GetScriptItems() = 0;
+
+        // Inactive zones don't update their item lists when the manager updates.
+        virtual void SetZoneActive(bool inActive) = 0;
+        virtual bool IsZoneActive() = 0;
+
+        virtual void AddActivityItems(TActivityItem root) = 0;
+
+        // Get the time policy that is owned by this element.
+        virtual CTimePolicy *GetOwnedTimePolicy(TActivityItem item) = 0;
+        // Get the local time for this element.  This is the time the animation system should see
+        virtual TTimeUnit GetItemLocalTime(TActivityItem item) = 0;
+        // Get the local time if this isn't independent, else get the time context time for the
+        // component.
+        virtual TTimeUnit GetItemComponentTime(TActivityItem item) = 0;
+
+        virtual SComponentTimePolicyOverride *
+        GetOrCreateItemComponentOverride(TActivityItem item, float inMultiplier,
+                                         TTimeUnit inEndTime,
+                                         IComponentTimeOverrideFinishedCallback *inCallback) = 0;
+
+        // If this item is independent, return this item.
+        // else get time parent of my parent.
+        virtual TActivityItemPtr GetItemTimeParent(TActivityItem item) = 0;
+
+        bool IsIndependent(TActivityItem item) { return GetOwnedTimePolicy(item) != NULL; }
+
+        // Any time the item has script flag changes after its initial creation.
+        // Note that this flag cannot change due to slide changes, it can only change due
+        // to something that had a script error and thus is disabled.
+        virtual void UpdateItemScriptStatus(TActivityItem item) = 0;
+
+        // If the start, end, or explicit active flags change *outside* of a slide change.
+        virtual void UpdateItemInfo(TActivityItem item) = 0;
+        virtual bool GetItemUserActive(TActivityItem item) = 0;
+
+        // Callback when the slide changes, the time context needs to be rebuilt in this case.
+        virtual void OnSlideChange(TActivityItem item) = 0;
+
+        virtual bool GetItemTimeActive(TActivityItem item) = 0;
+
+        virtual void BeginUpdate(QT3DSI64 inGlobalTime, IPerfTimer &inPerfTimer,
+                                 IThreadPool &inThreadPool) = 0;
+        virtual bool IsUpdating() = 0;
+        virtual void EndUpdate() = 0;
+
+        virtual void GoToTime(TActivityItem item, TTimeUnit inTime) = 0;
+    };
+
+    class IActivityZoneManager : public NVRefCounted
+    {
+    protected:
+        virtual ~IActivityZoneManager() {}
+    public:
+        virtual IActivityZone &CreateActivityZone(Q3DStudio::CPresentation &inPresentation) = 0;
+
+        static IActivityZoneManager &CreateActivityZoneManager(NVFoundationBase &inFoundation,
+                                                               IStringTable &inStrTable);
+    };
+}
+}
+#endif