WIn_RustTools/RustTools/Editor/EditorTreeView.cs


using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml;
using RustTools.muqing;
using Windows.ApplicationModel.DataTransfer;
using Microsoft.UI.Xaml.Input;
using Windows.Storage;
using RustTools.Helpers;
using Microsoft.UI.Xaml.Media;
using Windows.Foundation;
using System.Diagnostics;

namespace RustTools.Editor;

public class EditorTreeView: TreeView
{
    public EditorTreeView()
    {
        //CanDragItems = false;
        //CanReorderItems =false;
        //DragEnter += EditorTreeView_DragEnter;
        DragItemsStarting += TreeView_DragItemsStarting;
        DragItemsCompleted += EditorTreeView_DragItemsCompleted;
        //DragOver += TreeView_DragOver;
        //Drop += TreeView_Drop;
        // 在构造函数中注册事件处理程序
    }
    private void TreeView_DragItemsStarting(TreeView sender, TreeViewDragItemsStartingEventArgs e)
    {
        //gj.sc("TreeView_DragItemsStarting"+e);
        var items = e.Items.Cast<ExplorerItem>().ToList();
        var firstItem = items.First();
        gj.sc(firstItem.Dir);
        e.Data.SetData("path", firstItem.Dir);
        e.Data.RequestedOperation = DataPackageOperation.Move; // Use Copy to avoid moving items
    }
    private void EditorTreeView_DragItemsCompleted(TreeView sender, TreeViewDragItemsCompletedEventArgs e) {

        // 获取拖拽的项
        var items = e.Items.Cast<ExplorerItem>().ToList();

        // 检查是否有至少一个项被放下
        if (items.Any())
        {
            var firstItem = items.First(); // 获取第一个放下的项

            // 输出放下项的信息
            Debug.WriteLine($"放下了 {firstItem.Dir}");
        }
    }

    /// <summary>
    /// 如果是shift则开启多选状态
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void treeView_KeyDown(object sender, KeyRoutedEventArgs e)
    {
        // 检查是否按下了Shift键
        if (e.Key == Windows.System.VirtualKey.Shift)
        {
            gj.sc(e.Key);
            // 启用多选模式
            SelectionMode = TreeViewSelectionMode.Multiple;
        }
    }
    private void treeView_KeyUp(object sender, KeyRoutedEventArgs e)
    {
        // 检查是否松开了Shift键
        if (e.Key == Windows.System.VirtualKey.Shift)
        {        // 清除当前多选模式下选中的项目
            var selectedItems = SelectedItems.ToList();
            foreach (var item in selectedItems)
            {
                SelectedItems.Remove(item);
            }
            gj.sc("取消");
            // 取消多选模式
            SelectionMode = TreeViewSelectionMode.Single;
            //treeView.SelectedItems.Clear();
        }
    }





    /// <summary>
    /// 其他窗口的文件夹拖过来的例子
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void TreeView_DragOver(object sender, DragEventArgs e)
    {
        gj.sc(e);
        // Allow dragging but prevent reordering
        if (e.DataView.Contains(StandardDataFormats.StorageItems))
        {
            e.AcceptedOperation = DataPackageOperation.Move; // Use Copy to avoid reordering
            e.Handled = true;
        }
    }
    /// <summary>
    /// 其他文件夹拖过来的放下事件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private async void TreeView_Drop(object sender, DragEventArgs e)
    {
        gj.sc("TreeView_Drop: " + e);
        // Handle drop event if needed but prevent reordering
        if (e.DataView.Contains(StandardDataFormats.StorageItems))
        {
            var storageItems = await e.DataView.GetStorageItemsAsync();

            // 获取目标文件夹，即拖放的位置
            
        // 获取目标位置
        var treeView = sender as TreeView;

            var data = await e.DataView.GetDataAsync("path");
            gj.sc(data);
            foreach (var item in storageItems)
            {
                if (item is StorageFolder folder)
                {
                    // 移动文件夹
                    gj.sc(folder.Path+"-->");
                    //var newFolder = await folder.MoveAsync(targetFolder, folder.Name, NameCollisionOption.ReplaceExisting);
                }
                else if (item is StorageFile file)
                {
                    // 移动文件
                    //var newFile = await file.MoveAsync(targetFolder, file.Name, NameCollisionOption.ReplaceExisting);
                }
            }

            e.Handled = true;
        }
    }

}