Elwig: Add BackupService

Elwig/Windows/MainWindow.xaml.cs

@@ -50,22 +50,27 @@ namespace Elwig.Windows {
             _syncTimer.Start();
         }
 
-        private void Window_Closing(object sender, CancelEventArgs evt) {
+        private async void Window_Closing(object sender, CancelEventArgs evt) {
+            evt.Cancel = !App.ForceShutdown;
+
             if (App.NumWindows > 1 && !App.ForceShutdown) {
-                foreach (var w in App.Current.Windows.Cast<Window>().Where(w => ((w as AdministrationWindow)?.IsEditing ?? false) || ((w as AdministrationWindow)?.IsCreating ?? false))) {
+                foreach (var w in Application.Current.Windows.Cast<Window>().Where(w => ((w as AdministrationWindow)?.IsEditing ?? false) || ((w as AdministrationWindow)?.IsCreating ?? false))) {
                     try {
                         w.Close();
                     } catch { }
                 }
                 Thread.Sleep(100);
-                if (App.NumWindows > 1 && !App.Current.Windows.Cast<Window>().Any(w => ((w as AdministrationWindow)?.IsEditing ?? false) || ((w as AdministrationWindow)?.IsCreating ?? false))) {
+                if (App.NumWindows > 1 && !Application.Current.Windows.Cast<Window>().Any(w => ((w as AdministrationWindow)?.IsEditing ?? false) || ((w as AdministrationWindow)?.IsCreating ?? false))) {
                     if (!InteractionService.AskConfirmation("Elwig beenden", "Es sind noch weitere Fenster geöffnet.\nSollen alle Fenster geschlossen werden?")) {
-                        evt.Cancel = true;
-                    } else {
-                        Application.Current.Shutdown();
+                        return;
                     }
+                    App.ForceShutdown = true;
                 }
             }
+
+            Mouse.OverrideCursor = Cursors.AppStarting;
+            await (Application.Current as App)!.OnClosing();
+            Application.Current.Shutdown();
         }
 
         private void Menu_Help_About_Click(object sender, RoutedEventArgs evt) {
@@ -180,6 +185,8 @@ namespace Elwig.Windows {
             try {
                 var d = new OpenFileDialog() {
                     Title = "Datenbank wiederherstellen - Elwig",
+                    DefaultDirectory = App.Config.BackupPath,
+                    InitialDirectory = App.Config.BackupPath,
                     DefaultExt = "sql.zip",
                     Filter = "SQLite-Datenbank (*.sqlite3, *.sqlite3.zip, *.sql, *.sql.zip)|*.sqlite3;*.sqlite3.zip;*.sql;*.sql.zip",
                 };