revert: 撤销更改

Author: ArgoZhang

src/BootstrapBlazor/Components/TreeView/TreeView.razor

@@ -68,14 +68,13 @@ else
     RenderFragment RenderRow(TreeViewItem<TItem> item) =>
     @<TreeViewRow @key="item" IsActive="GetActive(item)" Index="GetIndex(item)" Item="item"
                   NodeIcon="@NodeIcon" ExpandNodeIcon="@ExpandNodeIcon" LoadingIcon="@LoadingIcon"
-                  MaxSelectedCount="MaxSelectedCount" AllowDrag="AllowDrag" PreviewDrop="_previewDrop"
+                  MaxSelectedCount="MaxSelectedCount" AllowDrag="AllowDrag"
                   ToolbarEditTitle="@ToolbarEditTitle" ToolbarEditLabelText="@ToolbarEditLabelText"
                   IsDisabled="IsDisabled" CanExpandWhenDisabled="CanExpandWhenDisabled"
                   ShowCheckbox="ShowCheckbox" ShowIcon="ShowIcon"
                   ShowToolbar="ShowToolbar" ShowToolbarCallback="ShowToolbarCallback"
                   OnToggleNodeAsync="OnToggleNodeAsync" OnClick="OnClick"
                   OnBeforeStateChangedCallback="OnBeforeStateChangedCallback"
                   OnCheckStateChanged="OnCheckStateChanged"
-                  OnItemDragStart="OnItemDragStart" OnItemDragEnd="OnItemDragEnd" OnItemDrop="OnItemDrop"
                   OnUpdateCallbackAsync="OnUpdateCallbackAsync" ToolbarTemplate="ToolbarTemplate"></TreeViewRow>;
 }

src/BootstrapBlazor/Components/TreeView/TreeView.razor.cs

@@ -740,107 +740,6 @@ public void ClearCheckedItems()
         StateHasChanged();
     }
 
-    private bool _previewDrop;
-    private TreeViewItem<TItem>? _draggingItem;
-
-    private void OnItemDragStart(TreeViewItem<TItem> treeViewItem)
-    {
-        _previewDrop = true;
-        _draggingItem = treeViewItem;
-        StateHasChanged();
-    }
-
-    private void OnItemDragEnd()
-    {
-        _previewDrop = false;
-        _draggingItem = null;
-        StateHasChanged();
-    }
-
-    private async Task OnItemDrop(TreeDropEventArgs<TItem> e)
-    {
-        if (_draggingItem is not null)
-        {
-            e.Source = _draggingItem;
-            var allowChangeSource = await OnDrop.Invoke(e);
-            if (!allowChangeSource)
-            {
-                return;
-            }
-
-            // 如果允许改变源节点则更新拖拽项的父对象以及排序
-            if (_draggingItem.Parent is not null)
-            {
-                _draggingItem.Parent.Items.Remove(_draggingItem);
-            }
-            else
-            {
-                // 没有父对象，则从顶层节点集合中移除
-                Items.Remove(_draggingItem);
-            }
-
-            _draggingItem.IsExpand = e.ExpandAfterDrop;
-
-            switch (e.DropType)
-            {
-                case TreeDropType.AsFirstChild:
-                    // 插入到目标的第一个子节点
-                    e.Target.Items.Insert(0, _draggingItem);
-                    _draggingItem.Parent = e.Target;
-                    break;
-                case TreeDropType.AsLastChild:
-                    // 插入到目标的最后一个子节点
-                    e.Target.Items.Add(_draggingItem);
-                    _draggingItem.Parent = e.Target;
-                    break;
-                case TreeDropType.AsSiblingBelow:
-                    // 作为目标的下一个兄弟节点
-                    if (e.Target.Parent is not null)
-                    {
-                        var index = e.Target.Parent.Items.IndexOf(e.Target);
-                        if (index >= 0 && index < e.Target.Parent.Items.Count - 1)
-                        {
-                            e.Target.Parent.Items.Insert(index + 1, _draggingItem);
-                        }
-                        else
-                        {
-                            e.Target.Parent.Items.Add(_draggingItem);
-                        }
-
-                        _draggingItem.Parent = e.Target.Parent;
-                    }
-                    // 如果目标没有父节点，则作为顶层节点处理
-                    else
-                    {
-                        // 目标节点的Index
-                        var index = Items.IndexOf(e.Target);
-                        if (index >= 0 && index < Items.Count - 1)
-                        {
-                            Items.Insert(index + 1, _draggingItem);
-                        }
-                        else
-                        {
-                            Items.Add(_draggingItem);
-                        }
-
-                        _draggingItem.Parent = null;
-                    }
-
-                    break;
-            }
-
-            _draggingItem = null;
-            _previewDrop = false;
-            _rows = GetTreeItems().ToFlat();
-
-            StateHasChanged();
-        }
-        else
-        {
-            throw new InvalidOperationException("拖拽的项为空");
-        }
-    }
-
     /// <summary>
     /// Gets all selected node collections
     /// </summary>

src/BootstrapBlazor/Components/TreeView/TreeViewRow.razor.cs

@@ -188,7 +188,6 @@ public partial class TreeViewRow<TItem>
     private bool _isBusy = false;
     private bool _showToolbar = false;
 
-
     /// <summary>
     /// <inheritdoc/>
     /// </summary>