Ground work for Wino Calendar. (#475)

Wino Calendar abstractions.

Wino.Calendar/Views/AppShell.xaml.cs

@@ -0,0 +1,57 @@
+using CommunityToolkit.Mvvm.Messaging;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Wino.Calendar.Views.Abstract;
+using Wino.Messaging.Client.Calendar;
+
+namespace Wino.Calendar.Views
+{
+    public sealed partial class AppShell : AppShellAbstract,
+        IRecipient<GoToCalendarDayMessage>
+    {
+        private const string STATE_HorizontalCalendar = "HorizontalCalendar";
+        private const string STATE_VerticalCalendar = "VerticalCalendar";
+
+        public Frame GetShellFrame() => ShellFrame;
+        public AppShell()
+        {
+            InitializeComponent();
+
+            Window.Current.SetTitleBar(DragArea);
+
+            ViewModel.DisplayTypeChanged += CalendarDisplayTypeChanged;
+        }
+
+        private void CalendarDisplayTypeChanged(object sender, Core.Domain.Enums.CalendarDisplayType e)
+        {
+            // Go to different states based on the display type.
+            if (ViewModel.IsVerticalCalendar)
+            {
+                VisualStateManager.GoToState(this, STATE_VerticalCalendar, false);
+            }
+            else
+            {
+                VisualStateManager.GoToState(this, STATE_HorizontalCalendar, false);
+            }
+        }
+
+        private void ShellFrameContentNavigated(object sender, Windows.UI.Xaml.Navigation.NavigationEventArgs e)
+        {
+
+        }
+
+        private void BackButtonClicked(Core.UWP.Controls.WinoAppTitleBar sender, Windows.UI.Xaml.RoutedEventArgs args)
+        {
+
+        }
+
+        public void Receive(GoToCalendarDayMessage message)
+        {
+            CalendarView.GoToDay(message.DateTime);
+        }
+
+        private void PreviousDateClicked(object sender, RoutedEventArgs e) => WeakReferenceMessenger.Default.Send(new GoPreviousDateRequestedMessage());
+
+        private void NextDateClicked(object sender, RoutedEventArgs e) => WeakReferenceMessenger.Default.Send(new GoNextDateRequestedMessage());
+    }
+}