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1 files changed, 108 insertions, 0 deletions

diff --git a/print/v4PrintDriverSamples/PrinterExtensionSample/ExtensionSample/ValidationModalDialog.xaml.cs b/print/v4PrintDriverSamples/PrinterExtensionSample/ExtensionSample/ValidationModalDialog.xaml.cs
new file mode 100644
index 00000000..0728c84c
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+++ b/print/v4PrintDriverSamples/PrinterExtensionSample/ExtensionSample/ValidationModalDialog.xaml.cs
@@ -0,0 +1,108 @@
+// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
+// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
+// PARTICULAR PURPOSE.
+//
+// Copyright (c) Microsoft Corporation. All rights reserved
+//
+//
+// Abstract:
+//
+//     This file contains as the interaction logic for ValidationModaldialog.
+//     This dialog prevents the user from making changes to print ticket settings when asynchronous
+//     validation is being performed.
+
+using System;
+using System.Collections.Generic;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+
+using Microsoft.Samples.Printing.PrinterExtension.Types;
+
+namespace Microsoft.Samples.Printing.PrinterExtension
+{
+    /// <summary>
+    /// Interaction logic for ValidationModalDialog.xaml
+    /// This dialog prevents the user from changing print preferences when validation is in progress.
+    /// </summary>
+    public partial class ValidationModalDialog : UserControl
+    {
+        public ValidationModalDialog()
+        {
+            InitializeComponent();
+            Visibility = Visibility.Hidden;
+        }
+
+        /// <summary>
+        /// Starts the asynchronous operation.
+        /// </summary>
+        /// <param name="asyncOperationToStart">Async operation context.</param>
+        public void StartAsyncOperation(IPrintSchemaAsyncOperation asyncOperationToStart)
+        {
+            this.asyncOperationContext = asyncOperationToStart;
+            Visibility = Visibility.Visible;
+            asyncOperationToStart.Completed += asyncOperation_Completed;
+            asyncOperationToStart.Start();
+        }
+
+
+        /// <summary>
+        /// This method is invoked from a different thread once asynchronous validation is completed.
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void asyncOperation_Completed(object sender, PrintSchemaAsyncOperationEventArgs e)
+        {
+            ValidationHResult = e.StatusHResult;
+            HideWindow();
+
+            if (Completed != null)
+            {
+                Completed(this, e);
+            }
+        }
+
+        /// <summary>
+        /// Hides the current window.
+        /// </summary>
+        private void HideWindow()
+        {
+            this.Dispatcher.Invoke(new Action(() =>
+            {
+                Visibility = Visibility.Hidden;
+            }));
+        }
+
+
+        /// <summary>
+        ///  Result of the validation operation.
+        /// </summary>
+        public int ValidationHResult
+        {
+            get;
+            private set;
+        }
+
+        /// <summary>
+        /// Invoked then the "Cancel" button is clicked.
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void CancelValidationButton_Click(object sender, RoutedEventArgs e)
+        {
+            asyncOperationContext.Cancel();
+            HideWindow();
+        }
+
+        /// <summary>
+        /// Invoked when the asynchronous operation is completed.
+        /// </summary>
+        public event EventHandler<PrintSchemaAsyncOperationEventArgs> Completed;
+
+        /// <summary>
+        /// Asynchronous operation context.
+        /// </summary>
+        private IPrintSchemaAsyncOperation asyncOperationContext;
+    }
+}