117 lines
4.0 KiB
C++
117 lines
4.0 KiB
C++
//*********************************************************
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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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// App.xaml.cpp
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// Implementation of the App.xaml class.
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//
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#include "pch.h"
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#include "MainPage.xaml.h"
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#include "AdvancedCapture.xaml.h"
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#include "Common\SuspensionManager.h"
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using namespace SDKSample;
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using namespace SDKSample::Common;
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using namespace SDKSample::MediaCapture;
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using namespace Concurrency;
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using namespace Platform;
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using namespace Windows::ApplicationModel;
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using namespace Windows::ApplicationModel::Activation;
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using namespace Windows::Foundation;
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using namespace Windows::Foundation::Collections;
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using namespace Windows::UI::Core;
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using namespace Windows::UI::Xaml;
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using namespace Windows::UI::Xaml::Controls;
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using namespace Windows::UI::Xaml::Controls::Primitives;
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using namespace Windows::UI::Xaml::Data;
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using namespace Windows::UI::Xaml::Input;
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using namespace Windows::UI::Xaml::Interop;
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using namespace Windows::UI::Xaml::Media;
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using namespace Windows::UI::Xaml::Navigation;
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/// <summary>
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/// Initializes the singleton application object. This is the first line of authored code
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/// executed, and as such is the logical equivalent of main() or WinMain().
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/// </summary>
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App::App()
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{
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InitializeComponent();
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this->Suspending += ref new SuspendingEventHandler(this, &SDKSample::App::OnSuspending);
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}
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/// <summary>
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/// Invoked when the application is launched normally by the end user. Other entry points will
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/// be used when the application is launched to open a specific file, to display search results,
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/// and so forth.
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/// </summary>
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/// <param name="pArgs">Details about the launch request and process.</param>
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void App::OnLaunched(LaunchActivatedEventArgs^ pArgs)
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{
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this->LaunchArgs = pArgs;
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// Do not repeat app initialization when already running, just ensure that
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// the window is active
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if (pArgs->PreviousExecutionState == ApplicationExecutionState::Running)
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{
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Window::Current->Activate();
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return;
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}
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// Create a Frame to act as the navigation context and associate it with
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// a SuspensionManager key
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auto rootFrame = ref new Frame();
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SuspensionManager::RegisterFrame(rootFrame, "AppFrame");
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auto prerequisite = task<void>([](){});
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if (pArgs->PreviousExecutionState == ApplicationExecutionState::Terminated)
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{
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// Restore the saved session state only when appropriate, scheduling the
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// final launch steps after the restore is complete
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prerequisite = SuspensionManager::RestoreAsync();
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}
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prerequisite.then([=]()
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{
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// When the navigation stack isn't restored navigate to the first page,
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// configuring the new page by passing required information as a navigation
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// parameter
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if (rootFrame->Content == nullptr)
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{
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if (!rootFrame->Navigate(TypeName(MainPage::typeid)))
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{
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throw ref new FailureException("Failed to create initial page");
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}
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}
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// Place the frame in the current Window and ensure that it is active
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Window::Current->Content = rootFrame;
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Window::Current->Activate();
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}, task_continuation_context::use_current());
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}
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/// <summary>
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/// Invoked when application execution is being suspended. Application state is saved
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/// without knowing whether the application will be terminated or resumed with the contents
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/// of memory still intact.
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/// </summary>
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/// <param name="sender">The source of the suspend request.</param>
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/// <param name="e">Details about the suspend request.</param>
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void App::OnSuspending(Object^ sender, SuspendingEventArgs^ e)
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{
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(void) sender; // Unused parameter
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auto deferral = e->SuspendingOperation->GetDeferral();
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SuspensionManager::SaveAsync().then([=]()
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{
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deferral->Complete();
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});
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}
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