EventDispatcher and IEventListener.

VAR.Toolbox/Code/EventDispatcher.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+
+namespace VAR.Toolbox.Code
+{
+    public static class EventDispatcher
+    {
+        private static List<IEventListener> _eventListeners = null;
+
+        private static IEnumerable<IEventListener> GetEventListeners()
+        {
+            if (_eventListeners != null)
+            {
+                return _eventListeners;
+            }
+
+            Type iEventListener = typeof(IEventListener);
+            IEnumerable<Type> eventListeners = ReflectionUtils.GetTypesOfInterface(iEventListener);
+            _eventListeners = new List<IEventListener>();
+            foreach (Type eventListener in eventListeners)
+            {
+                IEventListener eventListenerInstance = Activator.CreateInstance(eventListener) as IEventListener;
+                if (eventListenerInstance != null)
+                {
+                    _eventListeners.Add(eventListenerInstance);
+                }
+            }
+
+            return _eventListeners;
+        }
+
+        public static void EmitEvent(string eventName, object eventData)
+        {
+            IEnumerable<IEventListener> eventListeners = GetEventListeners();
+            foreach (IEventListener eventListener in eventListeners)
+            {
+                eventListener.ProcessEvent(eventName, eventData);
+            }
+        }
+
+    }
+}

VAR.Toolbox/Code/IEventListener.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace VAR.Toolbox.Code
+{
+    public interface IEventListener
+    {
+        void ProcessEvent(string eventName, object eventData);
+    }
+}

VAR.Toolbox/UI/Tools/FrmCover.cs

@@ -67,6 +67,7 @@ namespace VAR.Toolbox.UI
             Mouse.SetPosition(_mouseX, _mouseY);
 
             Close();
+            EventDispatcher.EmitEvent(PnlCover.PostCoverEventName, null);
         }
 
         private void FrmCover_KeyPress(object sender, KeyPressEventArgs e)
@@ -77,6 +78,7 @@ namespace VAR.Toolbox.UI
             Mouse.SetPosition(_mouseX, _mouseY);
 
             Close();
+            EventDispatcher.EmitEvent(PnlCover.PostCoverEventName, null);
         }
 
         private void Timer_Tick(object sender, EventArgs e)

VAR.Toolbox/UI/Tools/PnlCover.cs

@@ -1,11 +1,15 @@
 using System;
 using System.Windows.Forms;
+using VAR.Toolbox.Code;
 using VAR.Toolbox.Code.Windows;
 
 namespace VAR.Toolbox.UI
 {
     public partial class PnlCover : UserControl, IToolPanel
     {
+        public const string PreCoverEventName = "PreCover";
+        public const string PostCoverEventName = "PostCover";
+
         public PnlCover()
         {
             InitializeComponent();
@@ -39,6 +43,9 @@ namespace VAR.Toolbox.UI
         private void CoverScreen()
         {
             if (DesignMode) { return; }
+
+            EventDispatcher.EmitEvent(PreCoverEventName, null);
+
             if (_frmCover != null)
             {
                 _frmCover.Show();

VAR.Toolbox/UI/Tools/PnlSuspension.cs

@@ -1,11 +1,14 @@
 using System;
 using System.Windows.Forms;
+using VAR.Toolbox.Code;
 using VAR.Toolbox.Code.Windows;
 
 namespace VAR.Toolbox.UI
 {
     public partial class PnlSuspension : UserControl, IToolPanel
     {
+        public const string PreSuspendEventName = "PreSuspend";
+
         private readonly Random _rnd = new Random();
 
         public PnlSuspension()
@@ -118,6 +121,7 @@ namespace VAR.Toolbox.UI
 
         private void SuspendSystem()
         {
+            EventDispatcher.EmitEvent(PreSuspendEventName, null);
             Win32.SetSuspendState(false, true, false);
         }
     }

VAR.Toolbox/VAR.Toolbox.csproj

@@ -73,7 +73,9 @@
     <Compile Include="..\VAR.Json\VAR.Json\ParserContext.cs">
       <Link>Code\Json\ParserContext.cs</Link>
     </Compile>
+    <Compile Include="Code\EventDispatcher.cs" />
     <Compile Include="Code\HexUtils.cs" />
+    <Compile Include="Code\IEventListener.cs" />
     <Compile Include="Code\ProxyCmdExecutors\ProxyCmdExecutorWMIC.cs" />
     <Compile Include="Code\ReflectionUtils.cs" />
     <Compile Include="Code\TextCoders\TextCoderBase64Utf8.cs" />