Custom print dialog.

2025-10-20 21:10:29 +02:00
parent baf4141773
commit 4191b7314f
13 changed files with 1432 additions and 0 deletions
@@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Drawing.Printing;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.UI.Xaml;
+using Wino.Core.Domain.Models.Printing;
+using Wino.Core.WinUI.Dialogs;
+using Wino.Core.WinUI.Interfaces;
+
+namespace Wino.Core.WinUI.Services;
+
+/// <summary>
+/// Service implementation for displaying the custom print dialog and managing print settings.
+/// </summary>
+public class PrintDialogService : IPrintDialogService
+{
+    /// <summary>
+    /// Shows the print dialog and returns the configured print settings.
+    /// </summary>
+    /// <param name="initialSettings">Initial print settings to populate the dialog with. If null, default settings will be used.</param>
+    /// <param name="availablePrinters">List of available printers to show in the dialog. If null or empty, the service will discover printers.</param>
+    /// <returns>
+    /// A task that resolves to the configured WebView2PrintSettingsModel if the user clicked Print,
+    /// or null if the user cancelled the dialog.
+    /// </returns>
+    [UnconditionalSuppressMessage("ReflectionAnalysis", "IL2070:UnrecognizedReflectionPattern", 
+        Justification = "GetProperty is used for backward compatibility and gracefully handles failures")]
+    public async Task<WebView2PrintSettingsModel> ShowPrintDialogAsync(
+        WebView2PrintSettingsModel initialSettings = null,
+        IEnumerable<string> availablePrinters = null)
+    {
+        try
+        {
+            // Note: XamlRoot will be set by the calling code when showing the dialog
+
+            // Create the print dialog
+            var dialog = initialSettings != null 
+                ? new PrintDialog(initialSettings) 
+                : new PrintDialog();
+
+            // The XamlRoot will be set by the calling code when showing the dialog
+
+            // Get available printers if not provided
+            var printers = availablePrinters ?? await GetAvailablePrintersAsync();
+            dialog.SetAvailablePrinters(printers);
+
+            // Show the dialog
+            var result = await dialog.ShowAsync();
+
+            // Return the settings if user clicked Print, otherwise null
+            return result == Microsoft.UI.Xaml.Controls.ContentDialogResult.Primary 
+                ? dialog.PrintSettings 
+                : null;
+        }
+        catch (Exception ex)
+        {
+            // Log the exception if logging is available
+            System.Diagnostics.Debug.WriteLine($"Error showing print dialog: {ex.Message}");
+            return null;
+        }
+    }
+
+    /// <summary>
+    /// Gets the list of available printers on the system.
+    /// </summary>
+    /// <returns>A task that resolves to a list of available printer names.</returns>
+    public async Task<IEnumerable<string>> GetAvailablePrintersAsync()
+    {
+        return await Task.Run(() =>
+        {
+            try
+            {
+                var printers = new List<string>();
+                
+                // Get all installed printers using System.Drawing.Printing
+                foreach (string printerName in PrinterSettings.InstalledPrinters)
+                {
+                    printers.Add(printerName);
+                }
+
+                return printers.AsEnumerable();
+            }
+            catch (Exception ex)
+            {
+                // Log the exception if logging is available
+                System.Diagnostics.Debug.WriteLine($"Error getting available printers: {ex.Message}");
+                return Enumerable.Empty<string>();
+            }
+        });
+    }
+}