notify before a context menu is to be displayed on the Document Explorer treeview

Libraries/UniversalEditor.UserInterface/EditorDocumentExplorer.cs

@@ -19,6 +19,8 @@
 //  You should have received a copy of the GNU General Public License
 //  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 using System;
+using MBS.Framework.UserInterface.Controls;
+
 namespace UniversalEditor.UserInterface
 {
 	public class EditorDocumentExplorer
@@ -31,5 +33,24 @@ namespace UniversalEditor.UserInterface
 		}
 
 		public EditorDocumentExplorerNode.EditorDocumentExplorerNodeCollection Nodes { get; private set; } = null;
+		public EditorDocumentExplorerNode SelectedNode
+		{
+			get
+			{
+				ListView lv = ((MainWindow)HostApplication.CurrentWindow).DocumentExplorerPanel.ListView;
+				if (lv.SelectedRows.Count > 0)
+				{
+					return lv.SelectedRows[0].GetExtraData<EditorDocumentExplorerNode>("node");
+				}
+				return null;
+			}
+		}
+
+		public event EditorDocumentExplorerBeforeContextMenuEventHandler BeforeContextMenu;
+
+		internal void FireBeforeContextMenu(EditorDocumentExplorerBeforeContextMenuEventArgs e)
+		{
+			BeforeContextMenu?.Invoke(this, e);
+		}
 	}
 }

Libraries/UniversalEditor.UserInterface/EditorDocumentExplorerBeforeContextMenuEvent.cs

@@ -0,0 +1,35 @@
+//
+//  EditorDocumentExplorerBeforeContextMenuEvent.cs
+//
+//  Author:
+//       Michael Becker <alcexhim@gmail.com>
+//
+//  Copyright (c) 2020 Mike Becker's Software
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+using System;
+namespace UniversalEditor.UserInterface
+{
+	public class EditorDocumentExplorerBeforeContextMenuEventArgs : EventArgs
+	{
+		public EditorDocumentExplorerNode Node { get; private set; }
+		public string ContextMenuCommandID { get; set; } = null;
+
+		public EditorDocumentExplorerBeforeContextMenuEventArgs(EditorDocumentExplorerNode node)
+		{
+			Node = node;
+		}
+	}
+	public delegate void EditorDocumentExplorerBeforeContextMenuEventHandler(object sender, EditorDocumentExplorerBeforeContextMenuEventArgs e);
+}

Libraries/UniversalEditor.UserInterface/MainWindow.cs

@@ -40,6 +40,7 @@ namespace UniversalEditor.UserInterface
 		private SolutionExplorerPanel pnlSolutionExplorer = new SolutionExplorerPanel();
 		private PropertyListPanel pnlPropertyList = new PropertyListPanel();
 		private DocumentExplorerPanel pnlDocumentExplorer = new DocumentExplorerPanel();
+		public DocumentExplorerPanel DocumentExplorerPanel { get { return pnlDocumentExplorer; } }
 
 		private RibbonTab LoadRibbonBar(CommandBar cb)
 		{

Libraries/UniversalEditor.UserInterface/Panels/DocumentExplorerPanel.cs

@@ -8,12 +8,15 @@ namespace UniversalEditor.UserInterface.Panels
 	public class DocumentExplorerPanel : Panel
 	{
 		private ListView lv = null;
+		public ListView ListView { get { return lv; } }
+
 		private DefaultTreeModel tm = null;
 
 		public DocumentExplorerPanel()
 		{
 			Layout = new BoxLayout(Orientation.Vertical);
 			lv = new ListView();
+			lv.BeforeContextMenu += lv_BeforeContextMenu;
 			lv.SelectionChanged += lv_SelectionChanged;
 
 			tm = new DefaultTreeModel(new Type[] { typeof(string) });
@@ -24,6 +27,19 @@ namespace UniversalEditor.UserInterface.Panels
 			Controls.Add(lv, new BoxLayout.Constraints(true, true));
 		}
 
+		private void lv_BeforeContextMenu(object sender, EventArgs e)
+		{
+			if (lv.SelectedRows.Count == 0)
+				return;
+
+			EditorDocumentExplorerNode node = lv.SelectedRows[0].GetExtraData<EditorDocumentExplorerNode>("node");
+			EditorDocumentExplorerBeforeContextMenuEventArgs ee = new EditorDocumentExplorerBeforeContextMenuEventArgs(node);
+
+			CurrentEditor.DocumentExplorer.FireBeforeContextMenu(ee);
+
+			lv.ContextMenuCommandID = ee.ContextMenuCommandID;
+		}
+
 		private void lv_SelectionChanged(object sender, EventArgs e)
 		{
 			if (lv.SelectedRows.Count == 0)

Libraries/UniversalEditor.UserInterface/UniversalEditor.UserInterface.csproj

@@ -132,6 +132,7 @@
     <Compile Include="EditorDocumentExplorerNode.cs" />
     <Compile Include="EditorDocumentExplorerSelectionChangedEvent.cs" />
     <Compile Include="Editors\Markup\MarkupEditor.cs" />
+    <Compile Include="EditorDocumentExplorerBeforeContextMenuEvent.cs" />
   </ItemGroup>
   <ItemGroup>
     <BootstrapperPackage Include="Microsoft.Net.Client.3.5">