103 lines
3.0 KiB
C#
103 lines
3.0 KiB
C#
using System;
|
||
using System.Collections.Generic;
|
||
using System.Collections.Specialized;
|
||
using System.Linq;
|
||
using Sicentury.Core.Collections;
|
||
using Sicentury.Core.EventArgs;
|
||
|
||
namespace Sicentury.Core.Tree
|
||
{
|
||
public class TreeNodeCollection : ObservableRangeCollection<TreeNode>
|
||
{
|
||
#region Variables
|
||
|
||
public event EventHandler<TreeNodeSelectionChangedEventArgs> TerminalNodeSelectionChanged;
|
||
|
||
#endregion
|
||
|
||
#region Constructors
|
||
|
||
public TreeNodeCollection(TreeNode parent, IEnumerable<TreeNode> collection) : base(collection)
|
||
{
|
||
Parent = parent;
|
||
if (collection != null)
|
||
{
|
||
var list = collection.ToList();
|
||
foreach (var subNode in list)
|
||
{
|
||
subNode.ParentNode = Parent;
|
||
subNode.TerminalNodeSelectionChanged += SubNodeOnTerminalNodeSelectionChanged;
|
||
subNode.ChildNodesChanged += SubNodeOnChildNodesChanged;
|
||
}
|
||
}
|
||
}
|
||
|
||
public TreeNodeCollection(TreeNode parent) : this(parent, new TreeNode[0])
|
||
{
|
||
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region Properties
|
||
|
||
|
||
|
||
/// <summary>
|
||
/// 父节点。
|
||
/// </summary>
|
||
public TreeNode Parent { get; }
|
||
|
||
#endregion
|
||
|
||
#region Methods
|
||
|
||
public override void AddRange(IEnumerable<TreeNode> collection)
|
||
{
|
||
var lst = collection?.ToList();
|
||
lst?.ForEach(subNode =>
|
||
{
|
||
subNode.ParentNode = Parent;
|
||
subNode.TerminalNodeSelectionChanged += SubNodeOnTerminalNodeSelectionChanged;
|
||
subNode.ChildNodesChanged += SubNodeOnChildNodesChanged;
|
||
});
|
||
|
||
base.AddRange(lst);
|
||
}
|
||
|
||
protected override void InsertItem(int index, TreeNode subNode)
|
||
{
|
||
if (subNode == null)
|
||
return;
|
||
|
||
subNode.ParentNode = Parent;
|
||
subNode.TerminalNodeSelectionChanged += SubNodeOnTerminalNodeSelectionChanged;
|
||
subNode.ChildNodesChanged += SubNodeOnChildNodesChanged;
|
||
|
||
base.InsertItem(index, subNode);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 当子节点触发TerminalNodeSelectionChanged事件时调用该方法，通知父节点。
|
||
/// </summary>
|
||
/// <param name="sender"></param>
|
||
/// <param name="e"></param>
|
||
private void SubNodeOnTerminalNodeSelectionChanged(object sender, TreeNodeSelectionChangedEventArgs e)
|
||
{
|
||
TerminalNodeSelectionChanged?.Invoke(this, e);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 当某个节点的ChildNodes列表发生变化时调用该方法，通知父节点。
|
||
/// </summary>
|
||
/// <param name="sender"></param>
|
||
/// <param name="e"></param>
|
||
private void SubNodeOnChildNodesChanged(object sender, NotifyCollectionChangedEventArgs e)
|
||
{
|
||
OnCollectionChanged(e);
|
||
}
|
||
|
||
#endregion
|
||
}
|
||
}
|