Version 3.0.255

LastenradBayern/TINK/View/RootFlyout/RootPage.xaml.cs

@@ -0,0 +1,95 @@
+using System;
+using TINK.Model.Station;
+#if USEFLYOUT
+using TINK.View.MasterDetail;
+#endif
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+namespace TINK.View.Root
+{
+    /// <summary>
+    /// Mamages creation of detail pages if a flyout page menu entry is selected.
+    /// Exposes flyout page style navigation which is used by detail pages.
+    /// </summary>
+    /// <remarks>
+    /// Examples of use cases when detail pages do navigation:
+    // - switch to map page after succesfully logging in/ logging out
+    // - switch to login page form bikes at station page if not yet logged in
+    /// </remarks>
+    [XamlCompilation(XamlCompilationOptions.Compile)]
+#if USEFLYOUT
+    public partial class RootPage : FlyoutPage, INavigationMasterDetail
+#else
+    public partial class RootPage : FlyoutPage
+#endif
+    {
+        public RootPage()
+        {
+            InitializeComponent();
+            FlyoutPage.ListView.ItemSelected += OnListViewItemSelected;
+
+            // Any type of split behaviour conflics with map shifting functionality (assuming FlyoutPage behaves same like MasterDetailPage).
+            FlyoutLayoutBehavior = FlyoutLayoutBehavior.Popover;
+ 
+            var navigationPage = Detail as NavigationPage;
+            if (navigationPage == null)
+            {
+                return;
+            }
+
+#if USEFLYOUT
+            var detailPage = navigationPage.RootPage as IDetailPage;
+            if (detailPage == null)
+            {
+                return;
+            }
+
+            detailPage.NavigationMasterDetail = this;
+#endif
+        }
+
+        /// <summary>
+        /// Is called if a flyout page menu entry is selected.
+        /// Creates  a new page.
+        /// </summary>
+        private void OnListViewItemSelected(object sender, SelectedItemChangedEventArgs e)
+        {
+            if (!(e.SelectedItem is RootPageFlyoutMenuItem item))
+            {
+                // Unexpected argument detected.
+                return;
+            }
+
+            // Set selected station to new 
+            App.ModelRoot.SelectedStation = new NullStation();
+
+            ShowPage(item.TargetType, item.Title);
+
+            IsPresented = false;
+            FlyoutPage.ListView.SelectedItem = null;
+        }
+
+        /// <summary>
+        /// Shows a detail page.
+        /// </summary>
+        /// <param name="typeOfPage">Type of page to show.</param>
+        /// <param name="title">Title of page.</param>
+        public void ShowPage(Type typeOfPage, string title)
+        {
+            var page = (Page)Activator.CreateInstance(typeOfPage);
+            page.Title = title;
+
+#if USEFLYOUT
+            if (page is IDetailPage detailPage)
+            {
+                // Detail page needs reference to perform navigation.
+                // Examples see above in xdoc of class.
+                detailPage.NavigationMasterDetail = this;
+            }
+#endif
+
+            Detail = new NavigationPage(page);
+        }
+    }
+}