wip. ControlCatalog. handling of bitmap formats in clipboard

samples/ControlCatalog/Pages/ClipboardPage.xaml

@@ -12,12 +12,16 @@
     <Button Click="CopyFilesDataObject" Content="Copy files to clipboard (data object)" />
     <Button Click="PasteFilesDataObject" Content="Paste files from clipboard (data object)" />
 
+    <Button Click="CopyBitmapDataObject" Content="Copy bitmap (CF_DIB, image/bmp) to clipboard (data object)" />
+    <Button Click="PasteBitmapDataObject" Content="Paste bitmap (CF_DIB, image/bmp) from clipboard (data object)" />
+
     <Button Click="GetFormats" Content="Get clipboard formats" />
     <Button Click="Clear" Content="Clear clipboard" />
 
     <TextBox x:Name="ClipboardContent"
-             MinHeight="100"
+             MinHeight="400"
              AcceptsReturn="True"
-             Watermark="Text to copy of file names per line" />
+             Watermark="Text to copy of file names per line"
+             TextWrapping="Wrap"/>
   </StackPanel>
 </UserControl>

samples/ControlCatalog/Pages/ClipboardPage.xaml.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text;
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.Notifications;
@@ -118,6 +119,36 @@ namespace ControlCatalog.Pages
             }
         }
 
+        private void CopyBitmapDataObject(object? sender, RoutedEventArgs args)
+        {
+            if (TopLevel.GetTopLevel(this)?.Clipboard is { } clipboard)
+            {
+
+            }
+        }
+
+        private async void PasteBitmapDataObject(object? sender, RoutedEventArgs args)
+        {
+            if (TopLevel.GetTopLevel(this)?.Clipboard is { } clipboard)
+            {
+                var bytes = await clipboard.GetDataAsync("Bitmap") as IEnumerable<byte> 
+                    ?? await clipboard.GetDataAsync("Dib") as IEnumerable<byte>;
+
+                if (bytes != null)
+                {
+                    var printable = bytes.Take(1000);
+                    var sb = new StringBuilder(256 + printable.Count() * 3);
+                    sb.AppendLine($"{bytes.Count()} bytes, list of first {printable.Count()}");
+                    sb.AppendJoin(" ", printable.Select(x => x.ToString("X2")));
+                    ClipboardContent.Text = sb.ToString();
+                }
+                else
+                {
+                    ClipboardContent.Text = string.Empty;
+                }
+            }
+        }
+
         private async void GetFormats(object sender, RoutedEventArgs args)
         {
             if (TopLevel.GetTopLevel(this)?.Clipboard is { } clipboard)