Добавлен example

Lattice.Example.DragDrop/Handlers/CustomDropHandler.cs

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+using Lattice.Core.DragDrop.Abstractions;
+using Lattice.Core.DragDrop.Models;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Lattice.Example.DragDrop;
+
+public class CustomDropHandler : IDropTarget
+{
+    private readonly Action<object> _onDrop;
+
+    public CustomDropHandler(Action<object> onDrop)
+    {
+        _onDrop = onDrop;
+    }
+
+    public async Task<bool> CanAcceptDropAsync(DropInfo dropInfo, CancellationToken cancellationToken = default)
+    {
+        // Принимаем только объекты типа DragDropItem
+        return dropInfo.Data is DragDropItem;
+    }
+
+    public async Task OnDragOverAsync(DropInfo dropInfo, CancellationToken cancellationToken = default)
+    {
+        if (dropInfo.Data is DragDropItem)
+        {
+            dropInfo.SuggestedEffects = Core.DragDrop.Enums.DragDropEffects.Copy;
+            dropInfo.ShowVisualFeedback = true;
+        }
+    }
+
+    public async Task OnDropAsync(DropInfo dropInfo, CancellationToken cancellationToken = default)
+    {
+        if (dropInfo.Data is DragDropItem item)
+        {
+            _onDrop(item);
+            dropInfo.MarkAsHandled();
+        }
+    }
+
+    public Task OnDragLeaveAsync(CancellationToken cancellationToken = default)
+    {
+        return Task.CompletedTask;
+    }
+}