Add support for const data items. These are non-editable fields that are added to the data.

Author: Lyeeedar

StructuredXmlEditor/Data/Item/ConstDataItem.cs

@@ -0,0 +1,42 @@
+using StructuredXmlEditor.Definition;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StructuredXmlEditor.Data
+{
+	public class ConstDataItem : DataItem
+	{
+		public ConstDataItem(DataDefinition definition, UndoRedoManager undoRedo) : base(definition, undoRedo)
+		{
+		}
+
+		public override bool IsVisible
+		{
+			get
+			{
+				return false;
+			}
+			set { }
+		}
+
+		public override string Description => null;
+
+		public override void Copy()
+		{
+			
+		}
+
+		public override void Paste()
+		{
+			
+		}
+
+		public override void ResetToDefault()
+		{
+			
+		}
+	}
+}

StructuredXmlEditor/Data/Item/DataItem.cs

@@ -142,7 +142,7 @@ public bool IsFilterMatched
 		}
 
 		//-----------------------------------------------------------------------
-		public bool IsVisible
+		public virtual bool IsVisible
 		{
 			get { return m_isVisible && !m_isSearchFiltered && !IsMultieditFiltered && IsVisibleFromBindings; }
 			set

StructuredXmlEditor/Definition/ConstDefinition.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+using StructuredXmlEditor.Data;
+
+namespace StructuredXmlEditor.Definition
+{
+	public class ConstDefinition : DataDefinition
+	{
+		private String Value { get; set; }
+
+		public override DataItem CreateData(UndoRedoManager undoRedo)
+		{
+			return new ConstDataItem(this, undoRedo);
+		}
+
+		public override void DoSaveData(XElement parent, DataItem item)
+		{
+			var el = new XElement(Name, Value);
+			parent.Add(el);
+		}
+
+		public override bool IsDefault(DataItem item)
+		{
+			return true;
+		}
+
+		public override DataItem LoadData(XElement element, UndoRedoManager undoRedo)
+		{
+			return new ConstDataItem(this, undoRedo);
+		}
+
+		public override void Parse(XElement definition)
+		{
+			Name = definition.Attribute("Name").Value;
+			Value = definition.Value;
+		}
+	}
+}

StructuredXmlEditor/Definition/DataDefinition.cs

@@ -67,6 +67,13 @@ public void SaveData(XElement parent, DataItem item, bool isRoot = false)
 
 		public static DataDefinition LoadDefinition(XElement element, string forceLoadAs = null)
 		{
+			if (element.Name.ToString() == "Const")
+			{
+				var constDef = new ConstDefinition();
+				constDef.Parse(element);
+				return constDef;
+			}
+
 			var name = element.Attribute(MetaNS + "RefKey")?.Value.ToString().ToUpper();
 			if (name == null) name = element.Attribute("RefKey")?.Value.ToString().ToUpper();
 			if (name == null) name = element.Name.ToString().ToUpper();

StructuredXmlEditor/StructuredXmlEditor.csproj

@@ -100,6 +100,7 @@
     <Compile Include="Data\Item\ColourItem.cs" />
     <Compile Include="Data\Item\CommentItem.cs" />
     <Compile Include="Data\Item\ComplexDataItem.cs" />
+    <Compile Include="Data\Item\ConstDataItem.cs" />
     <Compile Include="Data\Item\DataItem.cs" />
     <Compile Include="Data\Item\DummyItem.cs" />
     <Compile Include="Data\Item\EnumItem.cs" />
@@ -122,6 +123,7 @@
     <Compile Include="Data\Item\TreeItem.cs" />
     <Compile Include="Data\Item\VectorItem.cs" />
     <Compile Include="Definition\CommentDefinition.cs" />
+    <Compile Include="Definition\ConstDefinition.cs" />
     <Compile Include="Definition\FlagsDefinition.cs" />
     <Compile Include="Definition\GraphCollectionDefinition.cs" />
     <Compile Include="Definition\GraphNodeDefinition.cs" />