﻿using System;
using System. Collections. Generic;
using System. Linq;
using System. Net;
using System. Windows;
using System. Windows. Controls;
using System. Windows. Documents;
using System. Windows. Input;
using System. Windows. Media;
using System. Windows. Media. Animation;
using System. Windows. Navigation;
using System. Windows. Shapes;
using Microsoft. Phone. Controls;
using Microsoft. Phone. Shell;

namespace PhoneDirect3DXamlAppInterop
{
    public partial class App : Application
    {
        /// <summary>
        /// Provides easy access to the root frame of the Phone Application. 
        /// </summary>
        /// <returns>The root frame of the Phone Application.</returns>
        public PhoneApplicationFrame RootFrame { get; private set; }

        /// <summary>
        /// Constructor for the Application object. 
        /// </summary>
        public App()
        {
            // Global handler for uncaught exceptions. 
            UnhandledException += Application_UnhandledException;

            // Standard Silverlight initialization
            InitializeComponent();

            // Phone-specific initialization
            InitializePhoneApplication();

            // Show graphics profiling information while debugging. 
            if (System. Diagnostics. Debugger. IsAttached)
            {
                // Display the current frame rate counters. 
                Application. Current. Host. Settings. EnableFrameRateCounter = false;

                // Show the areas of the app that are being redrawn in each frame. 
                //Application. Current. Host. Settings. EnableRedrawRegions = true;

                // Enable non-production analysis visualization mode,
                // which shows areas of a page that are handed off to GPU with a colored overlay. 
                //Application. Current. Host. Settings. EnableCacheVisualization = true;

                // Disable the application idle detection by setting the UserIdleDetectionMode property of the
                // application's PhoneApplicationService object to Disabled. 
                // Caution:- Use this under debug mode only.  Application that disables user idle detection will continue to run
                // and consume battery power when the user is not using the phone. 
                PhoneApplicationService. Current. UserIdleDetectionMode = IdleDetectionMode. Disabled;
            }

        }

        // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
        }

        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void Application_Activated(object sender, ActivatedEventArgs e)
        {
        }

        // Code to execute when the application is deactivated (sent to background)
        // This code will not execute when the application is closing
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)
        {
        }

        // Code to execute when the application is closing (eg, user hit Back)
        // This code will not execute when the application is deactivated
        private void Application_Closing(object sender, ClosingEventArgs e)
        {
        }

        // Code to execute if a navigation fails
        private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            if (System. Diagnostics. Debugger. IsAttached)
            {
                // A navigation has failed; break into the debugger
                System. Diagnostics. Debugger. Break();
            }
        }

        // Code to execute on Unhandled Exceptions
        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            if (System. Diagnostics. Debugger. IsAttached)
            {
                // An unhandled exception has occurred; break into the debugger
                System. Diagnostics. Debugger. Break();
            }
        }

        #region Phone application initialization

        // Avoid double-initialization
        private bool phoneApplicationInitialized = false;

        // Do not add any additional code to this method
        private void InitializePhoneApplication()
        {
            if (phoneApplicationInitialized)
                return;

            // Create the frame but don't set it as RootVisual yet; this allows the splash
            // screen to remain active until the application is ready to render. 
            RootFrame = new PhoneApplicationFrame();
            RootFrame. Navigated += CompleteInitializePhoneApplication;

            // Handle navigation failures
            RootFrame. NavigationFailed += RootFrame_NavigationFailed;

            // Handle reset requests for clearing the backstack
            RootFrame. Navigated += CheckForResetNavigation;

            // Ensure we don't initialize again
            phoneApplicationInitialized = true;
        }

        // Do not add any additional code to this method
        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            // Set the root visual to allow the application to render
            if (RootVisual ! = RootFrame)
                RootVisual = RootFrame;

            // Remove this handler since it is no longer needed
            RootFrame. Navigated -= CompleteInitializePhoneApplication;
        }

        private void CheckForResetNavigation(object sender, NavigationEventArgs e)
        {
            // If the app has received a 'reset' navigation, then we need to check
            // on the next navigation to see if the page stack should be reset
            if (e.NavigationMode == NavigationMode. Reset)
                RootFrame. Navigated += ClearBackStackAfterReset;
        }

        private void ClearBackStackAfterReset(object sender, NavigationEventArgs e)
        {
            // Unregister the event so it doesn't get called again
            RootFrame. Navigated -= ClearBackStackAfterReset;

            // Only clear the stack for 'new' (forward) navigations
            if (e.NavigationMode ! = NavigationMode. New)
                return;

            // For UI consistency, clear the entire page stack
            while (RootFrame. RemoveBackEntry() ! = null)
            {
                ; // do nothing
            }
        }

        #endregion
    }
}