// Copyright (c) Microsoft. All rights reserved.

using System;

using Windows.ApplicationModel.Activation;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Navigation;

namespace VideoCaptureSample

{

/// <summary>

/// Provides application-specific behavior to supplement the default Application class.

/// </summary>

sealed partial class App : Application

{

/// <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>

public App()

{

this.InitializeComponent();

}

/// <summary>

/// Invoked when the application is launched normally by the end user. Other entry points

/// will be used such as when the application is launched to open a specific file.

/// </summary>

/// <param name="e">Details about the launch request and process.</param>

protected override void OnLaunched(LaunchActivatedEventArgs e)

{

#if DEBUG

if (System.Diagnostics.Debugger.IsAttached)

{

this.DebugSettings.EnableFrameRateCounter = true;

}

#endif

Frame rootFrame = Window.Current.Content as Frame;

// Do not repeat app initialization when the Window already has content,

// just ensure that the window is active

if (rootFrame == null)

{

// Create a Frame to act as the navigation context and navigate to the first page

rootFrame = new Frame();

rootFrame.NavigationFailed += OnNavigationFailed;

if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)

{

//TODO: Load state from previously suspended application

}

// Place the frame in the current Window

Window.Current.Content = rootFrame;

}

if (rootFrame.Content == null)

{

// When the navigation stack isn't restored navigate to the first page,

// configuring the new page by passing required information as a navigation

// parameter

rootFrame.Navigate(typeof(MainPage), e.Arguments);

}

// Ensure the current window is active

Window.Current.Activate();

}

/// <summary>

/// Invoked when Navigation to a certain page fails

/// </summary>

/// <param name="sender">The Frame which failed navigation</param>

/// <param name="e">Details about the navigation failure</param>

void OnNavigationFailed(object sender, NavigationFailedEventArgs e)

{

throw new Exception("Failed to load Page " + e.SourcePageType.FullName);

}

}

}