video_capture_xaml/video_capture_xaml.Shared/App.xaml.cpp

//
// App.xaml.cpp
// Implementation of the App class.
//

// Copyright (c) Microsoft Open Technologies, Inc.
// All rights reserved.
//
// (3 - clause BSD License)
//
// Redistribution and use in source and binary forms, with or without modification, are permitted provided that
// the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
// following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
// following disclaimer in the documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or
// promote products derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT(INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

#include "pch.h"
#include "MainPage.xaml.h"
#include "App.xaml.h"

using namespace video_capture_xaml;

using namespace Platform;
using namespace Windows::ApplicationModel;
using namespace Windows::ApplicationModel::Activation;
using namespace Windows::Foundation;
using namespace Windows::Foundation::Collections;
using namespace Windows::UI::Xaml::Media::Animation;
using namespace Windows::UI::Xaml;
using namespace Windows::UI::Xaml::Controls;
using namespace Windows::UI::Xaml::Controls::Primitives;
using namespace Windows::UI::Xaml::Data;
using namespace Windows::UI::Xaml::Input;
using namespace Windows::UI::Xaml::Interop;
using namespace Windows::UI::Xaml::Media;
using namespace Windows::UI::Xaml::Navigation;

// The Blank Application template is documented at http://go.microsoft.com/fwlink/?LinkId=234227

/// <summary>
/// Initializes the singleton application object. This is the first line of authored code
/// executed, and as such is the logical equivalent of main() or WinMain().
/// </summary>
App::App()
{
    InitializeComponent();
    Suspending += ref new SuspendingEventHandler(this, &App::OnSuspending);
    Resuming += ref new Windows::Foundation::EventHandler<Platform::Object ^>(this, &video_capture_xaml::App::OnResuming);
}

/// <summary>
/// Invoked when the application is launched normally by the end user. Other entry points
/// will be used when the application is launched to open a specific file, to display
/// search results, and so forth.
/// </summary>
/// <param name="e">Details about the launch request and process.</param>
void App::OnLaunched(LaunchActivatedEventArgs^ e)
{
#if _DEBUG
    if (IsDebuggerPresent())
    {
        DebugSettings->EnableFrameRateCounter = true;
    }
#endif

    auto rootFrame = dynamic_cast<Frame^>(Window::Current->Content);

    // Do not repeat app initialization when the Window already has content,
    // just ensure that the window is active.
    if (rootFrame == nullptr)
    {
        // Create a Frame to act as the navigation context and associate it with
        // a SuspensionManager key
        rootFrame = ref new Frame();

        // TODO: Change this value to a cache size that is appropriate for your application.
        rootFrame->CacheSize = 1;

        if (e->PreviousExecutionState == ApplicationExecutionState::Terminated)
        {
            // TODO: Restore the saved session state only when appropriate, scheduling the
            // final launch steps after the restore is complete.
        }

        // Place the frame in the current Window
        Window::Current->Content = rootFrame;
    }

    if (rootFrame->Content == nullptr)
    {
#if WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP
        // Removes the turnstile navigation for startup.
        if (rootFrame->ContentTransitions != nullptr)
        {
            _transitions = ref new TransitionCollection();
            for (auto transition : rootFrame->ContentTransitions)
            {
                _transitions->Append(transition);
            }
        }

        rootFrame->ContentTransitions = nullptr;
        _firstNavigatedToken = rootFrame->Navigated += ref new NavigatedEventHandler(this, &App::RootFrame_FirstNavigated);
#endif

        // When the navigation stack isn't restored navigate to the first page,
        // configuring the new page by passing required information as a navigation
        // parameter.
        if (!rootFrame->Navigate(MainPage::typeid, e->Arguments))
        {
            throw ref new FailureException("Failed to create initial page");
        }
    }

    // Ensure the current window is active
    Window::Current->Activate();
}

#if WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP
/// <summary>
/// Restores the content transitions after the app has launched.
/// </summary>
void App::RootFrame_FirstNavigated(Object^ sender, NavigationEventArgs^ e)
{
    auto rootFrame = safe_cast<Frame^>(sender);

    TransitionCollection^ newTransitions;
    if (_transitions == nullptr)
    {
        newTransitions = ref new TransitionCollection();
        newTransitions->Append(ref new NavigationThemeTransition());
    }
    else
    {
        newTransitions = _transitions;
    }

    rootFrame->ContentTransitions = newTransitions;

    rootFrame->Navigated -= _firstNavigatedToken;
}
#endif

/// <summary>
/// Invoked when application execution is being suspended. Application state is saved
/// without knowing whether the application will be terminated or resumed with the contents
/// of memory still intact.
/// </summary>
void App::OnSuspending(Object^ sender, SuspendingEventArgs^ e)
{
    (void) sender;	// Unused parameter
    (void) e;		// Unused parameter

    // TODO: Save application state and stop any background activity
}

void video_capture_xaml::App::OnResuming(Platform::Object ^sender, Platform::Object ^args)
{
    // throw ref new Platform::NotImplementedException();
}