Lattice/Lattice.UI.DragDrop.WinUI/Services/WinUIDragDropHost.cs

using Lattice.Core.Geometry;
using Lattice.UI.DragDrop.Abstractions;
using Lattice.UI.DragDrop.WinUI.Controls;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using System;

namespace Lattice.UI.DragDrop.WinUI.Services;

public class WinUIDragDropHost : IDragDropHost
{
    private readonly DragDropOverlay _overlay;
    private readonly Window _window;

    public WinUIDragDropHost(Window window)
    {
        _window = window ?? throw new ArgumentNullException(nameof(window));
        _overlay = new DragDropOverlay();

        // Добавляем оверлей в окно
        if (_window.Content is Panel panel)
        {
            panel.Children.Add(_overlay);
        }
    }

    public void ShowDragVisual(object dragVisual, Point position)
    {
        if (dragVisual is UIElement element)
        {
            _overlay.ShowDragVisual(element, position.X, position.Y);
        }
    }

    public void UpdateDragVisualPosition(object dragVisual, Point position)
    {
        if (dragVisual is UIElement element)
        {
            _overlay.UpdateDragVisualPosition(element, position.X, position.Y);
        }
    }

    public void HideDragVisual(object dragVisual)
    {
        if (dragVisual is UIElement element)
        {
            _overlay.HideDragVisual(element);
        }
        else
        {
            // Скрываем все, если передан null
            var current = _overlay.GetCurrentDragVisual();
            if (current != null)
            {
                _overlay.HideDragVisual(current);
            }
        }
    }

    public void ShowDropAdorner(IDropVisualAdorner adorner)
    {
        if (adorner is DropPreviewAdorner dropAdorner)
        {
            // TODO: Показываем превью сброса
        }
    }

    public void HideDropAdorner(IDropVisualAdorner adorner)
    {
        _overlay.HideAllDropPreviews();
    }
}