Xamarin Plugin CrossSettings Two-way data binding for Applications settings Xamarin Form

Hi All,

I am using the excellent Xamarin Plugin from James Montemagno called CrossSettings in my Xamarin Forms application and I'd love to be able to do something like the following so I could implement two-way data binding in a Xamarin Forms application.

Helpers\Settings.cs

namespace MakeTracks.Core.Helpers
{
    /// <summary>
    /// This is the Settings static class that can be used in your Core solution or in any
    /// of your client applications. All settings are laid out the same exact way with getters
    /// and setters. 
    /// </summary>
   public static class Settings : INotifyPropertyChanged
    {
       #region INotifyPropertyChanged implementation`
        public event PropertyChangedEventHandler PropertyChanged;

        /// <summary>
        /// Protected method for firing PropertyChanged
        /// </summary>
        /// <param name="propertyName">The name of the property that changed</param>
        protected virtual void OnPropertyChanged (string propertyName)
        {
            var method = PropertyChanged;
            if (method != null)
                method (this, new PropertyChangedEventArgs (propertyName));
        }

        #endregion

And then in the settings property setter I would add the following:

        #region Setting Constants
        // Group Notifications setting key
        private const string GroupNotificationsKey = "group_notfications";
        private static readonly bool GroupNotificationsDefault = true;

       #endregion

        public static bool GroupNotifications
        {
            get
            {
                return AppSettings.GetValueOrDefault (GroupNotificationsKey, GroupNotificationsDefault);
            }
            set
            {
                //if value has changed then save it!
                AppSettings.AddOrUpdateValue (GroupNotificationsKey, value);

                OnPropertyChanged (GroupNotificationsKey);
            }
        }

Unfortunately the Settings.cs class is static and it wont allow it to implement interfaces like this.

I have a Xamarin Forms application with a settings page that is using a tableview and I am trying to bind the controls i.e. SwitchCell to the AppSettings.Properties for each setting so the form updates based on the value of the setting.

Has anyone successfully used this in a Xamarin.Forms application settings page like this?

Is there another way to achieve this via code i.e. setting binding context, etc.?

I have tried that without much success. Here is what I tried in my Applications Settings page:

    private bool _groupNotificationsSetting = Settings.GroupNotifications;
    public bool MyGroupNotifications {
        get { 
            return _groupNotificationsSetting; 
        }
        set {
            _groupNotificationsSetting = value;
        }
    }

        this.BindingContext = Settings.GroupNotifications;
        SwitchCell scGroupNotifications = new SwitchCell ();
        scGroupNotifications.Text = Data.NotificationsType.Group.ToStringValue ();
        // scGroupNotifications.IsEnabled = groupNotificationsSetting;
        scGroupNotifications.SetBinding (SwitchCell.IsEnabledProperty, new Binding("MyGroupNotifications"));

I get the following in the Xamarin console:

2014-12-07 16:54:42.744 MakeTracksiOS[88736:8129280] Binding: 'MyGroupNotifications' property not found on 'True', target property: 'Xamarin.Forms.SwitchCell.IsEnabled'
Binding: 'MyGroupNotifications' property not found on 'True', target property: 'Xamarin.Forms.SwitchCell.IsEnabled'

Any assistance would be greatly appreciated.

Cheers,

Grant