TemplateDesigner: pdf-Export

LehrerApp.TemplateDesigner/MainWindow.axaml.cs

@@ -267,6 +267,40 @@ public partial class MainWindow : Window
 
     private async void OnSaveAs(object? sender, RoutedEventArgs e) => await SaveAsAsync();
 
+    private async void OnExportCurrentPdf(object? sender, RoutedEventArgs e)
+    {
+        byte[] pdf;
+        try
+        {
+            pdf = _viewModel.RenderCurrentPdf();
+        }
+        catch (Exception ex)
+        {
+            _viewModel.SetStatus($"PDF-Export fehlgeschlagen: {ex.Message}", true);
+            return;
+        }
+
+        var file = await StorageProvider.SaveFilePickerAsync(new()
+        {
+            Title = "Aktuelle Vorlagenansicht als PDF exportieren",
+            SuggestedFileName = _viewModel.TemplateId + "-vorschau.pdf",
+            DefaultExtension = "pdf",
+            FileTypeChoices = [new("PDF-Dateien") { Patterns = ["*.pdf"] }],
+        });
+        if (file is null) return;
+
+        try
+        {
+            var destination = EnsurePdfExtension(file.Path.LocalPath);
+            await File.WriteAllBytesAsync(destination, pdf);
+            _viewModel.SetStatus($"PDF-Vorschau exportiert: {Path.GetFileName(destination)}", false);
+        }
+        catch (Exception ex)
+        {
+            _viewModel.SetStatus($"PDF-Export fehlgeschlagen: {ex.Message}", true);
+        }
+    }
+
     private async Task SaveAsAsync()
     {
         try { _viewModel.BuildLoaded(); }
@@ -332,6 +366,9 @@ public partial class MainWindow : Window
     private static string EnsurePackageExtension(string path) =>
         string.Equals(Path.GetExtension(path), TemplatePackage.Extension, StringComparison.OrdinalIgnoreCase)
             ? path : path + TemplatePackage.Extension;
+    private static string EnsurePdfExtension(string path) =>
+        string.Equals(Path.GetExtension(path), ".pdf", StringComparison.OrdinalIgnoreCase)
+            ? path : path + ".pdf";
     private void RefreshStarterTemplates(string? selectedId = null) =>
         _viewModel.SetStarterTemplates(_starterTemplates.GetAll(), selectedId);