完善

ItemInfoPanel.cs

@@ -1,10 +1,11 @@
+using System.Linq;
 using Godot;
 using Godot.Collections;
 using Learn.Models;
 
 public partial class ItemInfoPanel : Tree
 {
-	private Item _item;
+	private ItemGroup _item;
 
 	#region Columns Definitions
 	private const int EmptyColumn = 0;
@@ -40,12 +41,12 @@ public partial class ItemInfoPanel : Tree
 		var value = node.GetText(ValueColumn);
 		if (prevKey != currentKey)
 		{
-			_item.Info.Remove(prevKey);
+			_item.Remove(prevKey);
 		}
-		_item.Info[currentKey] = value;
+		_item.SetValue(currentKey, value);
 	}
 
-	public void SetCurrentItem(Item item)
+	public void SetCurrentItem(ItemGroup item)
 	{
 		_item = item;
 		OnCurrentItemChanged();
@@ -57,14 +58,13 @@ public partial class ItemInfoPanel : Tree
 		_nodeKeys.Clear();
 		if (_item == null) return;
 		var root = CreateItem();
-		foreach (var kv in _item.Info)
+		foreach (var key in _item.GetKeys())
 		{
-			var key = kv.Key;
-			var value = kv.Value;
+			if(!_item.TryGetValue(key, out var value, out var isSame)) continue;
 			var node = CreateItem(root);
 			
 			node.SetText(KeyColumn, key);
-			node.SetText(ValueColumn, value);
+			node.SetText(ValueColumn, isSame ? value : "-");
 			node.SetEditable(KeyColumn, true);
 			node.SetEditable(ValueColumn, true);
 			_nodeKeys.Add(node, key);
@@ -76,12 +76,10 @@ public partial class ItemInfoPanel : Tree
 		if(_item == null) return;
 		var newFieldName = "newField";
 		int index = 0;
-		while (_item.Info.ContainsKey(newFieldName + (index == 0 ? "" : index.ToString())))
+		while (!_item.TryAdd(newFieldName + (index == 0 ? "" : index.ToString()), ""))
 		{
 			index += 1;
 		}
-		newFieldName += (index == 0 ? "" : index.ToString());
-		_item.Info.Add(newFieldName, "");
 		OnCurrentItemChanged();
 	}
 
@@ -93,7 +91,7 @@ public partial class ItemInfoPanel : Tree
 		var root = GetRoot();
 		while (node != null)
 		{
-			_item.Info.Remove(_nodeKeys[node]);
+			_item.Remove(_nodeKeys[node]);
 			_nodeKeys.Remove(node);
 			var next = GetNextSelected(node);
 			root.RemoveChild(node);

LearnTree.cs

@@ -1,5 +1,6 @@
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using Godot;
 using Learn.Models;
 
@@ -10,19 +11,32 @@ public partial class LearnTree : Tree
 	[Export]
 	private ItemInfoPanel _itemInfoPanel;
 	
+	private bool _updateItemInfoPanel;
+	private readonly HashSet<Item> _selectingItems = new ();
+	private readonly Dictionary<TreeItem, Item> _mapper = new();
+
 	public override void _Ready()
 	{
 		MultiSelected += OnMultiSelected;
 	}
 
-	private void OnMultiSelected(TreeItem item, long column, bool selected)
+	public override void _Process(double delta)
 	{
-		TreeItem first = GetSelected();
-		if (first != null) _itemInfoPanel.SetCurrentItem(_mapper[first]);
-		else _itemInfoPanel.SetCurrentItem(null);
+		if (_updateItemInfoPanel)
+		{
+			_updateItemInfoPanel = false;
+			_itemInfoPanel.SetCurrentItem(new ItemGroup(_selectingItems));
+		}
+	}
+
+	private void OnMultiSelected(TreeItem item, long column, bool selected)
+	{
+		if(selected) _selectingItems.Add(_mapper[item]);
+		else _selectingItems.Remove(_mapper[item]);
+		
+		_updateItemInfoPanel = true;
 	}
 
-	private readonly Dictionary<TreeItem, Item> _mapper = new();
 
 	private TreeItem CreateNode(TreeItem father, Item item)
 	{
@@ -71,8 +85,10 @@ public partial class LearnTree : Tree
 		if (string.IsNullOrEmpty(path)) return;
 		Clear();
 		_mapper.Clear();
+		_selectingItems.Clear();
 		
 		TreeItem root = CreateItem();
 		BuildTree(root, path);
+		_updateItemInfoPanel = true;
 	}
 }

Models/ItemGroup.cs

@@ -0,0 +1,82 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Learn.Models;
+
+public class ItemGroup(IEnumerable<Item> items)
+{
+    public IEnumerable<string> GetKeys()
+    {
+        IEnumerable<string> inter = null;
+        foreach (var item in items)
+        {
+            if (inter == null)
+            {
+                inter = item.Info.Keys;
+            }
+            else
+            {
+                inter = inter.Intersect(item.Info.Keys);
+            }
+        }
+        if(inter == null) return new List<string>();
+        return inter.ToList();
+    }
+
+    public bool TryGetValue(string key, out string value, out bool isSame)
+    {
+        value = null;
+        isSame = true;
+        
+        if (!GetKeys().Contains(key)) return false;
+        
+        bool isFirst = true;
+        foreach (var item in items)
+        {
+            if (isFirst)
+            {
+                isFirst = false;
+            }
+            else
+            {
+                isSame = value == item.Info[key];
+                if(!isSame) return true;
+            }
+            value = item.Info[key];
+        }
+        return true;
+    }
+
+    public void SetValue(string key, string value)
+    {
+        foreach (var item in items)
+        {
+            item.Info[key] = value;
+        }
+    }
+
+    public bool Remove(string key)
+    {
+        if (!GetKeys().Contains(key)) return false;
+        foreach (var item in items)
+        {
+            item.Info.Remove(key);
+        }
+        return true;
+    }
+
+    private bool AnyContains(string key)
+    {
+        return items.Any(item => item.Info.Keys.Contains(key));
+    }
+    
+    public bool TryAdd(string key, string value)
+    {
+        if (AnyContains(key)) return false;
+        foreach (var item in items)
+        {
+            item.Info.Add(key, value);
+        }
+        return true;
+    }
+}

Models/ItemGroup.cs.uid

@@ -0,0 +1 @@
+uid://danmejsnufbuq