/// <summary>
/// force to change mainPage, so user can't go back never
/// </summary>
/// <param name="app">
/// </param>
/// <param name="page">
/// </param>
/// <returns>
/// </returns>
//https://forums.xamarin.com/discussion/26870/changing-root-from-a-navigation-page
public static async Task ChangeMainPage(this ICustomLayout app, Page page)
{
var root = app.NavPage.Navigation.NavigationStack[0];
app.NavPage.Navigation.InsertPageBefore(page, root);
await PopToRootAsync(app.NavPage);
}
/// <summary>
/// MvvmMessagingCenter initializer
/// </summary>
/// <param name="subcriber">
/// subcriber ICustomLayout
/// </param>
public static void Init(ICustomLayout subcriber)
{
if (_currentPage != null)
{
MessagingCenter.Unsubscribe <ICustomLayout, Exception>(_currentPage, MessagingCenterMessage.ExceptionOccurred);
}
lock (Sync)
_currentPage = subcriber;
MessagingCenter.Subscribe <ICustomLayout, Exception>(subcriber, MessagingCenterMessage.ExceptionOccurred, OnAppExceptionOccurred);
}
/// <summary>
/// custom event subcriber
/// </summary>
/// <param name="subcriber">
/// subcriber ICustomLayout
/// </param>
/// <param name="message">
/// type of MessagingCenterMessage class
/// </param>
public static void SubcribeIncomingEvent(ICustomLayout subcriber, string message)
{
MessagingCenter.Unsubscribe <ICustomLayout, MvvmMessagingCenterEventArgs>(subcriber, message);
MessagingCenter.Subscribe <ICustomLayout, MvvmMessagingCenterEventArgs>(subcriber, message, MessagingCenterIncomingEvents);
}
/// <summary>
/// </summary>
/// <param name="sender">
/// sender ICustomLayout
/// </param>
/// <param name="message">
/// type of MessagingCenterMessage class
/// </param>
/// <param name="Event">
/// custom object (we can cast it after handling)
/// </param>
public static void SendIncomingEvent(ICustomLayout sender, string message, object Event)
{
MessagingCenter.Send <ICustomLayout, MvvmMessagingCenterEventArgs>(sender, message, new MvvmMessagingCenterEventArgs(message, Event));
}
/// <summary>
/// </summary>
/// <param name="sender">
/// sender ICustomLayout
/// </param>
/// <param name="exp">
/// exception which occurs on run-time
/// </param>
public static void SendException(ICustomLayout sender, Exception exp)
{
MessagingCenter.Send <ICustomLayout, Exception>(sender, MessagingCenterMessage.ExceptionOccurred, exp);
}
public override void OnIncomingEvents(ICustomLayout sender, MvvmMessagingCenterEventArgs args)
{
object obj = args.Cast <object>(); //custom caster
DisplayAlert("CustomEvent", args.MessageId + " " + obj.ToString(), "OK");
}
public virtual void OnIncomingEvents(ICustomLayout sender, MvvmMessagingCenterEventArgs args)
{
}
