Доработан winui

Lattice.UI.Docking.WinUI/Services/DragDropService.cs

@@ -0,0 +1,53 @@
+using Microsoft.UI.Xaml;
+using System;
+
+namespace Lattice.UI.Docking.WinUI.Services;
+
+/// <summary>
+/// Сервис для управления операциями Drag & Drop в WinUI.
+/// </summary>
+public static class DragDropService
+{
+    /// <summary>
+    /// Настраивает элемент для поддержки перетаскивания.
+    /// </summary>
+    public static void SetupDragElement(UIElement element, Func<object?> getDataCallback)
+    {
+        element.CanDrag = true;
+        element.DragStarting += (sender, args) =>
+        {
+            var data = getDataCallback();
+            if (data != null)
+            {
+                args.Data.Properties.Add("LatticeDockElement", data);
+                args.Data.SetData("LatticeDockElement", data);
+                args.AllowedOperations = Windows.ApplicationModel.DataTransfer.DataPackageOperation.Move;
+            }
+        };
+    }
+
+    /// <summary>
+    /// Настраивает элемент для приема сброса.
+    /// </summary>
+    public static void SetupDropElement(UIElement element, Func<object, bool> dropCallback)
+    {
+        element.AllowDrop = true;
+        element.Drop += (sender, args) =>
+        {
+            if (args.DataView.Properties.TryGetValue("LatticeDockElement", out var data))
+            {
+                if (dropCallback(data))
+                {
+                    args.AcceptedOperation = Windows.ApplicationModel.DataTransfer.DataPackageOperation.Move;
+                }
+            }
+        };
+
+        element.DragOver += (sender, args) =>
+        {
+            args.AcceptedOperation = Windows.ApplicationModel.DataTransfer.DataPackageOperation.Move;
+            args.DragUIOverride.IsGlyphVisible = true;
+            args.DragUIOverride.Caption = "Переместить";
+        };
+    }
+}