Win App Store - xaml callbacks to handle Snap mode

Unity Engine
1

I’m using XAML callbacks to find out id the game window is in snap mode or not. The following code works if the Snap window is only 1/4 screen width, but stretch it widen and it fails.
The crux seems to be testing ;- Window.Current.SizeChanged += Current_SizeChanged; rather than is the app running ‘full screen’.
I’m thinking I should include a test to see if the snapped window is more than screen.width * 0.75 or something but can’t find any way to pole the screen resolution.
Or any better ideas?

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using Windows.ApplicationModel;

using Windows.ApplicationModel.Activation;

using Windows.Foundation;

using Windows.Foundation.Collections;

using Windows.UI.Core;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Controls.Primitives;

using Windows.UI.Xaml.Data;

using Windows.UI.Xaml.Input;

using Windows.UI.Xaml.Media;

using Windows.UI.Xaml.Navigation;

using UnityPlayer;

using Windows.UI.ViewManagement;

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

namespace Template

{

  /// <summary>

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

  /// </summary>

  sealed partial class App : Application

  {

  private WinRTBridge.WinRTBridge _bridge;

  private AppCallbacks appCallbacks;

  /// <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();

  appCallbacks = new AppCallbacks(false);

  appCallbacks.RenderingStarted += RemoveSplashScreen;

  }

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

  protected override void OnLaunched(LaunchActivatedEventArgs args)

  {

  appCallbacks.SetAppArguments(args.Arguments);

  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 && !appCallbacks.IsInitialized())

  {

  var mainPage = new MainPage(args.SplashScreen);

  Window.Current.Content = mainPage;

  Window.Current.Activate();

  // Setup scripting bridge

  _bridge = new WinRTBridge.WinRTBridge();

  appCallbacks.SetBridge(_bridge);

  appCallbacks.SetKeyboardTriggerControl(mainPage);

  appCallbacks.SetSwapChainBackgroundPanel(mainPage.GetSwapChainBackgroundPanel());

  appCallbacks.SetCoreWindowEvents(Window.Current.CoreWindow);

  appCallbacks.InitializeD3DXAML();

  }

  Window.Current.Activate();

  Window.Current.SizeChanged += Current_SizeChanged;

  }

  void Current_SizeChanged(object sender, WindowSizeChangedEventArgs e)

  {

  ApplicationViewState myViewState = ApplicationView.Value;

  if (myViewState == ApplicationViewState.Snapped)

  {

  AppCallbacks.Instance.InvokeOnAppThread(new AppCallbackItem(() =>

  {

  Windows8Handler.PauseGame(true);

  }), false);

  }

  else

  {

  AppCallbacks.Instance.InvokeOnAppThread(new AppCallbackItem(() =>

  {

  Windows8Handler.PauseGame(false);

  }), false);

  }

  }

  private void RemoveSplashScreen()

  {

  try

  {

  MainPage page = (MainPage)Window.Current.Content;

  page.RemoveSplashScreen();

  }

  catch (InvalidCastException)

  { }

  }

  }

}
2

Please use code tags code is unreadable if not

3

Thanks, better?