Add share sheet support

src/WinUIEx/HwndExtensions.cs

@@ -1,14 +1,12 @@
 using System;
-using System.Runtime.CompilerServices;
+using System.ComponentModel;
 using System.Runtime.InteropServices;
+using Microsoft.UI;
+using Windows.ApplicationModel.DataTransfer;
 using Windows.Win32;
 using Windows.Win32.Foundation;
-using Windows.Win32.UI.WindowsAndMessaging;
 using Windows.Win32.Graphics.Gdi;
-using WinRT;
-using Microsoft.UI;
-using Microsoft.UI.Xaml.Controls.Primitives;
-using System.ComponentModel;
+using Windows.Win32.UI.WindowsAndMessaging;
 
 namespace WinUIEx
 {
@@ -372,6 +370,29 @@ public static void SetLayeredWindowAttributes(IntPtr hWnd, byte chromaKeyRed, by
             if (!PInvoke.SetLayeredWindowAttributes(handle, color, alpha, LAYERED_WINDOW_ATTRIBUTES_FLAGS.LWA_COLORKEY | LAYERED_WINDOW_ATTRIBUTES_FLAGS.LWA_ALPHA))
                 Marshal.ThrowExceptionForHR(Marshal.GetLastWin32Error());
         }*/
+
+        private static readonly Guid dtmIid = new(0xa5caee9b, 0x8708, 0x49d1, 0x8d, 0x36, 0x67, 0xd2, 0x5a, 0x8d, 0xa0, 0x0c);
+
+        /// <summary>
+        /// Gets the DataTransferManager for the specified window handle
+        /// </summary>
+        /// <param name="hwnd">Window handle</param>
+        /// <returns>The DataTransferManager associated with the specified window handle.</returns>
+        public static DataTransferManager GetDataTransferManagerForWindow(IntPtr hwnd)
+        {
+            IDataTransferManagerInterop interop = DataTransferManager.As<IDataTransferManagerInterop>();
+            return WinRT.MarshalInterface<DataTransferManager>.FromAbi(interop.GetForWindow(hwnd, dtmIid));
+        }
+
+        /// <summary>
+        /// Displays the Windows Share UI for the specified window handle.
+        /// </summary>
+        /// <param name="hwnd">Window handle</param>
+        public static void ShowShareUIForWindow(IntPtr hwnd)
+        {
+            IDataTransferManagerInterop interop = DataTransferManager.As<IDataTransferManagerInterop>();
+            interop.ShowShareUIForWindow(hwnd);
+        }
     }
 
     /// <summary>
@@ -441,7 +462,7 @@ public enum WindowStyle : int
         Visible = 0x10000000,
         /// <summary>The window has a vertical scroll bar.</summary>
         VScroll = 0x00200000,
-    } 
+    }
 
     /// <summary>
     /// Flags used for ToggleExtendedWindowStyle method
@@ -512,4 +533,25 @@ public enum ExtendedWindowStyle : int
         /// <summary>The window has a border with a raised edge.</summary>
         WindowEdge = 0x00000100,
     }
+
+    [System.Runtime.InteropServices.ComImport]
+    [System.Runtime.InteropServices.Guid("3A3DCD6C-3EAB-43DC-BCDE-45671CE800C8")]
+    [System.Runtime.InteropServices.InterfaceType(
+        System.Runtime.InteropServices.ComInterfaceType.InterfaceIsIUnknown)]
+    interface IDataTransferManagerInterop
+    {
+        /// <summary>
+        /// Initializes the Share UI for the specified window.
+        /// </summary>
+        /// <param name="appWindow">The window for which to initialize the Share UI.</param>
+        /// <param name="riid">The interface ID of the IDataTransferManager interface.</param>
+        /// <returns>The IDataTransferManager interface for the specified window.</returns>
+        IntPtr GetForWindow([System.Runtime.InteropServices.In] IntPtr appWindow, [System.Runtime.InteropServices.In] ref Guid riid);
+
+        /// <summary>
+        /// Displays the Share UI for the specified window.
+        /// </summary>
+        /// <param name="appWindow">The window for which to display the Share UI.</param>
+        void ShowShareUIForWindow(IntPtr appWindow);
+    }
 }

src/WinUIEx/WindowExtensions.cs

@@ -1,7 +1,9 @@
 using Microsoft.UI;
 using Microsoft.UI.Windowing;
 using System;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using Windows.ApplicationModel.DataTransfer;
 using Windows.Win32;
 
 namespace WinUIEx
@@ -121,7 +123,7 @@ private static void UpdateOverlappedPresenter(this Microsoft.UI.Xaml.Window wind
             var appwindow = window.AppWindow;
             if (appwindow.Presenter is OverlappedPresenter overlapped)
                 action(overlapped);
-            else 
+            else
                 throw new NotSupportedException($"Not supported with a {appwindow.Presenter.Kind} presenter");
         }
         private static T GetOverlappedPresenterValue<T>(this Microsoft.UI.Xaml.Window window, Func<OverlappedPresenter?,T> action)
@@ -361,7 +363,7 @@ public static void SetWindowChromaKey(this Microsoft.UI.Xaml.Window window, Wind
         /// <param name="window">window</param>
         /// <param name="chromaKey">The color that specifies the transparency color key to be used when composing the layered window. All pixels painted by the window in this color will be transparent.</param>
         /// <param name="alpha">Alpha value used to describe the opacity of the layered window. When <paramref name="alpha"/> is 0, the window is completely transparent. When <paramref name="alpha"/> is 255, the window is opaque.</param>
-        public static void SetLayeredWindowAttributes(this Microsoft.UI.Xaml.Window window, Windows.UI.Color chromaKey, byte alpha) 
+        public static void SetLayeredWindowAttributes(this Microsoft.UI.Xaml.Window window, Windows.UI.Color chromaKey, byte alpha)
             => HwndExtensions.SetLayeredWindowAttributes(GetWindowHandle(window), chromaKey.R, chromaKey.G, chromaKey.B, alpha);*/
 
         /// <summary>
@@ -385,5 +387,18 @@ public static void SetRegion(this Microsoft.UI.Xaml.Window window, Region? regio
                 PInvoke.DeleteObject(rgn);
             }
         }
+
+        /// <summary>
+        /// Gets the <see cref="DataTransferManager"/> for the specified window.
+        /// </summary>
+        /// <param name="window">The window for which to get the <see cref="DataTransferManager"/>.</param>
+        /// <returns>The <see cref="DataTransferManager"/> associated with the specified window.</returns>
+        public static DataTransferManager GetDataTransferManager(this Microsoft.UI.Xaml.Window window) => HwndExtensions.GetDataTransferManagerForWindow(window.GetWindowHandle());
+
+        /// <summary>
+        /// Displays the Windows Share UI for the specified window.
+        /// </summary>
+        /// <param name="window">The window for which to display the Share UI.</param>
+        public static void ShowShareUI(this Microsoft.UI.Xaml.Window window) => HwndExtensions.ShowShareUIForWindow(window.GetWindowHandle());
     }
 }

src/WinUIExSample/Pages/Dialogs.xaml

@@ -20,6 +20,7 @@
             <Button Content="Show dialog" Click="ShowDialog_Click" />
             <Button Content="Show OK/Cancel" Click="ShowDialog2_Click" />
             <Button Content="Show 3-option dialog" Click="ShowDialog3_Click" />
+            <Button Content="Show share sheet" Click="ShowShareSheet_Click" />
             <TextBlock x:Name="resultText" />
         </StackPanel>
     </Grid>

src/WinUIExSample/Pages/Dialogs.xaml.cs

@@ -10,6 +10,7 @@
 using System.IO;
 using System.Linq;
 using System.Runtime.InteropServices.WindowsRuntime;
+using Windows.ApplicationModel.DataTransfer;
 using Windows.Foundation;
 using Windows.Foundation.Collections;
 using WinUIEx;
@@ -30,6 +31,7 @@ public Dialogs()
         }
 
         public WindowEx MainWindow => ((App)Application.Current).MainWindow!;
+        private TypedEventHandler<DataTransferManager, DataRequestedEventArgs>? shareDataProvider;
 
         private async void ShowDialog_Click(object sender, RoutedEventArgs e)
         {
@@ -65,5 +67,23 @@ private async void ShowDialog3_Click(object sender, RoutedEventArgs e)
             resultText.Text = "You chose: " + result.Label;
         }
 
+        private async void ShowShareSheet_Click(object sender, RoutedEventArgs e) 
+        {
+            var dtm = MainWindow.GetDataTransferManager();
+            dtm.DataRequested -= shareDataProvider;
+
+            shareDataProvider = (sender, args) => 
+            {
+                sender.DataRequested -= shareDataProvider;
+                resultText.Text = "";
+                args.Request.Data.Properties.Title = "WinUIEx Sample Share";
+                args.Request.Data.SetUri(new Uri("https://github.com/dotMorten/WinUIEx"));
+                args.Request.Data.SetText("Hello from WinUIEx!");
+            };
+
+            dtm.DataRequested += shareDataProvider;
+            MainWindow.ShowShareUI();
+        }
+
     }
 }