Added ToolboxItem class and dummy view model

RainmeterStudio.Core/Editor/Features/IToolboxProvider.cs

@@ -2,14 +2,29 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Windows;
 
 namespace RainmeterStudio.Core.Editor.Features
 {
+    /// <summary>
+    /// Editor provides toolbox items
+    /// </summary>
     public interface IToolboxProvider
     {
-        bool SupportsToolboxDrop { get; }
-        IEnumerable<string> ToolboxItems { get; }
+        /// <summary>
+        /// Gets a list of toolbox items
+        /// </summary>
+        IEnumerable<ToolboxItem> ToolboxItems { get; }
 
+        /// <summary>
+        /// Triggered if the toolbox items change
+        /// </summary>
         event EventHandler ToolboxItemsChanged;
+
+        /// <summary>
+        /// Called when a toolbar item is dropped by double-click
+        /// </summary>
+        /// <param name="item">Toolbox item dropped</param>
+        void ToolboxItemDrop(ToolboxItem item);
     }
 }

RainmeterStudio.Core/Editor/Features/ToolboxItem.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RainmeterStudio.Core.Editor.Features
+{
+    public class ToolboxItem
+    {
+        public string Name { get; private set; }
+
+        public ToolboxItem(string name)
+        {
+            Name = name;
+        }
+    }
+}