Custom print dialog.

Wino.Core.WinUI/Dialogs/PrintDialog.xaml.cs

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+using System.Collections.Generic;
+using Microsoft.UI.Xaml.Controls;
+using Wino.Core.Domain.Models.Printing;
+using Wino.Core.WinUI.Models;
+
+namespace Wino.Core.WinUI.Dialogs;
+
+/// <summary>
+/// Custom print dialog for configuring WebView2 print settings.
+/// </summary>
+public sealed partial class PrintDialog : ContentDialog
+{
+    /// <summary>
+    /// The ViewModel that handles the dialog's data binding and logic.
+    /// </summary>
+    public PrintDialogViewModel ViewModel { get; }
+
+    /// <summary>
+    /// Gets the configured print settings from the dialog.
+    /// </summary>
+    public WebView2PrintSettingsModel PrintSettings => ViewModel.PrintSettings;
+
+    public PrintDialog()
+    {
+        this.InitializeComponent();
+        ViewModel = new PrintDialogViewModel();
+        ViewModel.Initialize();
+    }
+
+    /// <summary>
+    /// Initializes the dialog with existing print settings.
+    /// </summary>
+    /// <param name="printSettings">The initial print settings to load.</param>
+    public PrintDialog(WebView2PrintSettingsModel printSettings)
+    {
+        this.InitializeComponent();
+        ViewModel = new PrintDialogViewModel();
+        ViewModel.Initialize(printSettings);
+    }
+
+    /// <summary>
+    /// Sets the list of available printers for the dialog.
+    /// </summary>
+    /// <param name="printers">List of available printer names.</param>
+    public void SetAvailablePrinters(IEnumerable<string> printers)
+    {
+        ViewModel.SetAvailablePrinters(printers);
+    }
+
+    /// <summary>
+    /// Validates the current print settings before closing the dialog.
+    /// </summary>
+    /// <returns>True if settings are valid, false otherwise.</returns>
+    private bool ValidateSettings()
+    {
+        // Validate printer selection
+        if (string.IsNullOrWhiteSpace(PrintSettings.PrinterName))
+        {
+            // Show error message or set focus to printer selection
+            return false;
+        }
+
+        // Validate copies
+        if (PrintSettings.Copies <= 0)
+        {
+            return false;
+        }
+
+        // Validate page ranges if custom range is specified
+        if (ViewModel.IsCustomPageRange && !string.IsNullOrWhiteSpace(PrintSettings.PageRanges))
+        {
+            // Basic validation for page ranges format
+            // More comprehensive validation could be added here
+            var pageRanges = PrintSettings.PageRanges.Trim();
+            if (string.IsNullOrEmpty(pageRanges))
+            {
+                return false;
+            }
+        }
+
+        // Validate margins
+        if (PrintSettings.MarginTop < 0 || PrintSettings.MarginBottom < 0 ||
+            PrintSettings.MarginLeft < 0 || PrintSettings.MarginRight < 0)
+        {
+            return false;
+        }
+
+        // Validate scale factor
+        if (PrintSettings.ScaleFactor < 0.1 || PrintSettings.ScaleFactor > 2.0)
+        {
+            return false;
+        }
+
+        return true;
+    }
+
+    private void ContentDialog_PrimaryButtonClick(ContentDialog sender, ContentDialogButtonClickEventArgs args)
+    {
+        // Validate settings before closing
+        if (!ValidateSettings())
+        {
+            args.Cancel = true;
+            // Could show error message here
+        }
+    }
+
+    private void ContentDialog_SecondaryButtonClick(ContentDialog sender, ContentDialogButtonClickEventArgs args)
+    {
+        // Cancel was clicked, no validation needed
+    }
+}