essential-ui-kit-for-xamarin.forms/EssentialUIKit.UWP/App.xaml.cs

using System;
using System.Collections.Generic;
using System.Reflection;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Activation;
using Windows.Foundation.Metadata;
using Windows.UI;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;

namespace EssentialUIKit.UWP
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    public 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();
            this.Suspending += this.OnSuspending;
        }

        /// <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 (ApiInformation.IsTypePresent("Windows.UI.ViewManagement.ApplicationViewTitleBar"))
            {
                var titlebar = ApplicationView.GetForCurrentView().TitleBar;
                if (titlebar != null)
                {
                    titlebar.BackgroundColor = Color.FromArgb(1, 39, 52, 112);
                    titlebar.ForegroundColor = Colors.White;
                    titlebar.ButtonBackgroundColor = Color.FromArgb(1, 39, 52, 112);
                }
            }

            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 += this.OnNavigationFailed;

                var assembliesToInclude = new List<Assembly>
                {
                    typeof(Syncfusion.XForms.UWP.Buttons.SfButtonRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.Buttons.SfCheckBoxRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.SfChart.XForms.UWP.SfChartRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.Border.SfBorderRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.Graphics.SfGradientViewRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.ListView.XForms.UWP.SfListViewRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.SfRating.XForms.UWP.SfRatingRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.SfRotator.XForms.UWP.SfRotatorRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.ComboBox.SfComboBoxRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.Buttons.SfRadioButtonRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.PopupLayout.SfPopupLayoutRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.Expander.SfExpanderRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.Cards.SfCardViewRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.Pickers.UWP.SfDatePickerRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.BadgeView.SfBadgeViewRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.Buttons.SfSegmentedControlRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.SfMaps.XForms.UWP.SfMapsRenderer).GetTypeInfo().Assembly,
                    typeof(Syncfusion.XForms.UWP.ProgressBar.SfLinearProgressRenderer).GetTypeInfo().Assembly,
                };
                Xamarin.Forms.Forms.SetFlags("CollectionView_Experimental");
                Xamarin.Forms.Forms.Init(e, assembliesToInclude);

                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>
        private void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
        }

        /// <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>
        /// <param name="sender">The source of the suspend request.</param>
        /// <param name="e">Details about the suspend request.</param>
        private void OnSuspending(object sender, SuspendingEventArgs e)
        {
            var deferral = e.SuspendingOperation.GetDeferral();
            //// TODO: Save application state and stop any background activity
            deferral.Complete();
        }
    }
}