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Open Source Computer Vision Library
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51 lines
2.0 KiB
51 lines
2.0 KiB
12 years ago
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//*********************************************************
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//
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// Copyright (c) Microsoft. All rights reserved.
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// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
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// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
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// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
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//
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//*********************************************************
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//
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// SuspensionManager.h
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// Declaration of the SuspensionManager class
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//
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#pragma once
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#include <ppltasks.h>
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namespace SDKSample
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{
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namespace Common
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{
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/// <summary>
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/// SuspensionManager captures global session state to simplify process lifetime management
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/// for an application. Note that session state will be automatically cleared under a variety
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/// of conditions and should only be used to store information that would be convenient to
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/// carry across sessions, but that should be disacarded when an application crashes or is
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/// upgraded.
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/// </summary>
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ref class SuspensionManager sealed
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{
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internal:
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static void RegisterFrame(Windows::UI::Xaml::Controls::Frame^ frame, Platform::String^ sessionStateKey);
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static void UnregisterFrame(Windows::UI::Xaml::Controls::Frame^ frame);
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static Concurrency::task<void> SaveAsync(void);
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static Concurrency::task<void> RestoreAsync(void);
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static property Windows::Foundation::Collections::IMap<Platform::String^, Platform::Object^>^ SessionState
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{
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Windows::Foundation::Collections::IMap<Platform::String^, Platform::Object^>^ get(void);
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};
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static Windows::Foundation::Collections::IMap<Platform::String^, Platform::Object^>^ SessionStateForFrame(
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Windows::UI::Xaml::Controls::Frame^ frame);
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private:
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static void RestoreFrameNavigationState(Windows::UI::Xaml::Controls::Frame^ frame);
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static void SaveFrameNavigationState(Windows::UI::Xaml::Controls::Frame^ frame);
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};
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}
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}
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