Utilize UWP Frame Back Navigation System

Author: lukeblevins

Files UWP/GenericFileBrowser.xaml

@@ -12,7 +12,7 @@
     xmlns:local2="using:Files.Filesystem"
     xmlns:local3="using:Files.Interacts"
     Name="GenericItemView"
-    mc:Ignorable="d" Background="{StaticResource ApplicationPageBackgroundThemeBrush}"  IsRightTapEnabled="True" RightTapped="GenericItemView_RightTapped" PointerReleased="GenericItemView_PointerReleased">
+    mc:Ignorable="d" NavigationCacheMode="Required" Background="{StaticResource ApplicationPageBackgroundThemeBrush}"  IsRightTapEnabled="True" RightTapped="GenericItemView_RightTapped" PointerReleased="GenericItemView_PointerReleased">
     <Page.Resources>
         <Style x:Key="TextBoxStyleForPathBar" TargetType="TextBox">
             <Setter Property="Foreground" Value="{ThemeResource DefaultTextForegroundThemeBrush}"/>

Files UWP/GenericFileBrowser.xaml.cs

@@ -110,8 +110,8 @@ protected override void OnNavigatedTo(NavigationEventArgs eventArgs)
             var parameters = (string)eventArgs.Parameter;
             App.ViewModel.CancelLoadAndClearFiles();
             App.ViewModel.Universal.path = parameters;
-            ProHome.BackButton.Click += NavigationActions.Back_Click;
-            ProHome.ForwardButton.Click += NavigationActions.Forward_Click;
+            //ProHome.BackButton.Click += NavigationActions.Back_Click;
+            //ProHome.ForwardButton.Click += NavigationActions.Forward_Click;
             ProHome.RefreshButton.Click += NavigationActions.Refresh_Click;
             ProHome.AddItemButton.Click += AddItem_ClickAsync;
             App.ViewModel.AddItemsToCollectionAsync(App.ViewModel.Universal.path, GenericItemView);

Files UWP/Interacts/Interaction.cs

@@ -115,7 +115,7 @@ public static async void List_ItemClick(object sender, DoubleTappedRoutedEventAr
                         {
                             ProHome.drivesList.SelectedIndex = 0;
                             App.ViewModel.Universal.path = clickedOnItem.FilePath;
-                            App.ViewModel.AddItemsToCollectionAsync(App.ViewModel.Universal.path, GenericFileBrowser.GFBPageName);
+                            ProHome.accessibleContentFrame.Navigate(typeof(GenericFileBrowser), App.ViewModel.Universal.path, new SuppressNavigationTransitionInfo());
                         }
                     }
                     else if (clickedOnItem.FileType == "Application")

Files UWP/Navigation/History.cs

@@ -51,12 +51,14 @@ public static void AddToForwardList(string pathToBeAdded)
             {
                 if (ForwardList[ForwardList.Count - 1] != pathToBeAdded)
                 {
-                    ForwardList.Add(pathToBeAdded);
+                    //ForwardList.Add(pathToBeAdded);
+                    ForwardList.Insert(0, pathToBeAdded);
                 }
             }
             else
             {
-                ForwardList.Add(pathToBeAdded);
+                //ForwardList.Add(pathToBeAdded);
+                ForwardList.Insert(0, pathToBeAdded);
             }
         }
     }

Files UWP/Navigation/NavigationActions.cs

@@ -47,8 +47,8 @@ protected override void OnNavigatedTo(NavigationEventArgs eventArgs)
             App.ViewModel.AddItemsToCollectionAsync(parameters, PhotoAlbumViewer);
             Interaction.page = this;
             FileList.DoubleTapped += Interaction.List_ItemClick;
-            ProHome.BackButton.Click += Navigation.PhotoAlbumNavActions.Back_Click;
-            ProHome.ForwardButton.Click += Navigation.PhotoAlbumNavActions.Forward_Click;
+            //ProHome.BackButton.Click += Navigation.PhotoAlbumNavActions.Back_Click;
+            //ProHome.ForwardButton.Click += Navigation.PhotoAlbumNavActions.Forward_Click;
             ProHome.RefreshButton.Click += Navigation.PhotoAlbumNavActions.Refresh_Click;
             FileList.RightTapped += Interaction.FileList_RightTapped;
             OpenItem.Click += Interaction.OpenItem_Click;

Files UWP/PhotoAlbum.xaml.cs

@@ -1089,7 +1089,7 @@
                          <ColumnDefinition Width="Auto"/>
                     </Grid.ColumnDefinitions>
                             <StackPanel Grid.Column="0" Orientation="Horizontal">
-                            <AppBarButton Icon="Back" LabelPosition="Collapsed" IsEnabled="{x:Bind local:App.ViewModel.BS.isEnabled, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" x:Name="Back">
+                            <AppBarButton Icon="Back" Click="Back_Click" LabelPosition="Collapsed" IsEnabled="{x:Bind local:App.ViewModel.BS.isEnabled, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" x:Name="Back">
 
                                 <AppBarButton.KeyboardAccelerators>
                                     <KeyboardAccelerator Modifiers="Control" Key="Left"/>

Files UWP/ProHome.xaml

@@ -103,6 +103,12 @@ public ProHome()
             PopulateNavViewWithExternalDrives();
         }
 
+        protected override void OnNavigatedTo(NavigationEventArgs e)
+        {
+            BackButton.IsEnabled = accessibleContentFrame.CanGoBack;
+            ForwardButton.IsEnabled = accessibleContentFrame.CanGoForward;
+        }
+
         public async void PopulateNavViewWithExternalDrives()
         {
             var knownRemDevices = new ObservableCollection<string>();
@@ -424,6 +430,15 @@ private async void PermissionDialog_PrimaryButtonClick(ContentDialog sender, Con
             await Launcher.LaunchUriAsync(new Uri("ms-settings:privacy-broadfilesystemaccess"));
 
         }
+
+        private void Back_Click(object sender, RoutedEventArgs e)
+        {
+            App.ViewModel.CancelLoadAndClearFiles();
+            if (accessibleContentFrame.CanGoBack)
+            {
+                accessibleContentFrame.GoBack();
+            }
+        }
     }
 
     public class Tab