sharee.bike-App/Meinkonrad/TINK/View/Settings/SettingsPage.xaml.cs

using TINK.ViewModel;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using System.Threading.Tasks;
#if USEFLYOUT
using TINK.View.MasterDetail;
#endif
using System;
using TINK.Model.Device;
using Xamarin.CommunityToolkit.Extensions;

namespace TINK.View.Settings
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
#if USEFLYOUT
    public partial class SettingsPage : ContentPage, IViewService, IDetailPage
#else
    public partial class SettingsPage : ContentPage, IViewService
#endif
    {
        /// <summary> Refernce to view model. </summary>
        SettingsPageViewModel m_oViewModel = null;

        /// <summary> Constructs a settings page. </summary>
        public SettingsPage ()
		{
			InitializeComponent ();

            var l_oModel = App.ModelRoot;

            m_oViewModel = new SettingsPageViewModel(
                l_oModel,
                App.GeolocationServicesContainer,
                this);

            BindingContext = m_oViewModel;

            Filters.ItemsSource = m_oViewModel.GroupFilter;
        }

        /// <summary> Displays alert message. </summary>
        /// <param name="p_strTitle">Title of message.</param>
        /// <param name="p_strMessage">Message to display.</param>
        /// <param name="p_strCancel">Type of buttons.</param>
        public new async Task DisplayAlert(string p_strTitle, string p_strMessage, string p_strCancel)
            => await App.Current.MainPage.DisplayAlert(p_strTitle, p_strMessage, p_strCancel);

        /// <summary> Displays alert message.</summary>
        /// <param name="title">Title of message.</param>
        /// <param name="message">Message to display.</param>
        /// <param name="details">Detailed error description.</param>
        /// <param name="cancel">Type of buttons.</param>
        public async Task DisplayAdvancedAlert(
            string title,
            string message,
            string details,
            string cancel)
            => await App.Current.MainPage.DisplayAlert(title, $"{message}\r\nDetails:\r\n{details}", cancel);

        /// <summary> Displays detailed alert message.</summary>
        /// <param name="title">Title of message.</param>
        /// <param name="message">Message to display.</param>
        /// <param name="details">Detailed error description.</param>
        /// <param name="accept">Text of accept button.</param>
        /// <param name="cancel">Text of cancel button.</param>
        /// <returns>True if user pressed accept.</returns>
        public async Task<bool> DisplayAdvancedAlert(string title, string message, string details, string accept, string cancel)
            => await App.Current.MainPage.DisplayAlert(title, $"{message}\r\nDetails:\r\n{details}", accept, cancel);

        /// <summary> Displays alert message.</summary>
        /// <param name="p_strTitle">Title of message.</param>
        /// <param name="p_strMessage">Message to display.</param>
        /// <param name="p_strAccept">Text of accept button.</param>
        /// <param name="p_strCancel">Text of button.</param>
        /// <returns>True if user pressed accept.</returns>
        public new async Task<bool> DisplayAlert(string p_strTitle, string p_strMessage, string p_strAccept, string p_strCancel) 
            => await App.Current.MainPage.DisplayAlert(p_strTitle, p_strMessage, p_strAccept, p_strCancel);

        /// <summary>
        /// Displays an action sheet.
        /// </summary>
        /// <param name="p_strTitle">Title of message.</param>
        /// <param name="p_strMessage">Message to display.</param>
        /// <param name="p_strCancel">Text of button.</param>
        /// <param name="destruction"></param>
        /// <param name="p_oButtons">Buttons holding options to select.</param>
        /// <returns>Text selected</returns>
        public new async Task<string> DisplayActionSheet(String p_strTitle, String p_strCancel, String destruction, params String[] p_oButtons)
                => await base.DisplayActionSheet(p_strTitle, p_strCancel, destruction, p_oButtons);

#if USEFLYOUT
        /// <summary>
        /// Creates and a page an shows it.
        /// </summary>
        /// <param name="p_oTypeOfPage">Type of page to show.</param>
        public void ShowPage(ViewTypes p_oType, string p_strTitle = null)
            => m_oNavigation.ShowPage(p_oType.GetViewType(), p_strTitle);
#else
        /// <summary> Shows a page.</summary>
        /// <param name="route">Route of the page to show.</param>
        public async Task ShowPage(string route) => await Shell.Current.GoToAsync(route);
#endif

        /// <summary> Pushes a page onto the modal stack. </summary>
        /// <param name="p_oTypeOfPage">Page to display.</param>
        public Task PushModalAsync(ViewTypes p_oTypeOfPage)
            => throw new NotImplementedException();       

        /// <summary> Pops a page from the modal stack. </summary>
        public Task PopModalAsync()
            => throw new NotSupportedException();

#if USEFLYOUT
        /// <summary>Delegate to perform navigation.</summary>
        private INavigationMasterDetail m_oNavigation;

        /// <summary>
        /// Delegate to perform navigation.
        /// </summary>
        public INavigationMasterDetail NavigationMasterDetail
        {
            set { m_oNavigation = value; }
        }

#endif
        /// <summary>
        /// Invoked when pages is closed/ hidden. 
        /// Stops update process.
        /// </summary>
        protected async override void OnDisappearing()
        {
            if (m_oViewModel == null)
            {
                // View model might be null.
                return;
            }

            await m_oViewModel?.OnDisappearing();
        }

        /// <summary> Pushes a page onto the stack. </summary>
        /// <param name="p_oTypeOfPage">Page to display.</param>
        public async Task PushAsync(ViewTypes p_oTypeOfPage)
            => await Navigation.PushAsync((Page)Activator.CreateInstance(p_oTypeOfPage.GetViewType()));

#if USCSHARP9
        public async Task<IViewService.IUserFeedback> DisplayUserFeedbackPopup() => await Navigation.ShowPopupAsync<FeedbackPopup.Result>(new FeedbackPopup());
#else
        /// <summary> Displays user feedback popup.</summary>
        /// <param name="co2Saving"> Co2 saving information.</param>
        /// <returns>User feedback.</returns>
        public async Task<IUserFeedback> DisplayUserFeedbackPopup(string co2Saving = null) => await Navigation.ShowPopupAsync<FeedbackPopup.Result>(new FeedbackPopup());
#endif

#if USERFEEDBACKDLG_TRYOUT
        public async void OnFeedbackClickedAsync(object sender, EventArgs ev)
        {
            var result = await DisplayUserFeedbackPopup();

            DisplayAlert(
                "Title",
                $"Bike broken: {result.IsBikeBroken}. Message: {result.Message}.",
                "OK");
        }
#endif
    }
}