From 48c63b3bb0db17b75cd29ba65df1d32a60e27bf1 Mon Sep 17 00:00:00 2001
From: Dan Clark <dan.clark@videosoftglobal.com>
Date: Sat, 2 Nov 2024 20:08:57 +0000
Subject: [PATCH] Moved WndProcMonitor to this project

---
 Toolkit.Windows/IWndProcMonitor.cs  |  7 +++
 Toolkit.Windows/PointerMonitor.cs   | 69 ++++++++++++++++++++++++++---
 Toolkit.Windows/WndProcEventArgs.cs |  3 ++
 3 files changed, 74 insertions(+), 5 deletions(-)
 create mode 100644 Toolkit.Windows/IWndProcMonitor.cs
 create mode 100644 Toolkit.Windows/WndProcEventArgs.cs

diff --git a/Toolkit.Windows/IWndProcMonitor.cs b/Toolkit.Windows/IWndProcMonitor.cs
new file mode 100644
index 0000000..70f11e8
--- /dev/null
+++ b/Toolkit.Windows/IWndProcMonitor.cs
@@ -0,0 +1,7 @@
+using Toolkit.Foundation;
+
+namespace Toolkit.Windows;
+
+public interface IWndProcMonitor :
+    IInitialization, 
+    IDisposable;
diff --git a/Toolkit.Windows/PointerMonitor.cs b/Toolkit.Windows/PointerMonitor.cs
index c734816..48101d3 100644
--- a/Toolkit.Windows/PointerMonitor.cs
+++ b/Toolkit.Windows/PointerMonitor.cs
@@ -1,12 +1,71 @@
-using System.Drawing;
-using Windows.Win32;
-using Windows.Win32.UI.WindowsAndMessaging;
-using Windows.Win32.Foundation;
-using System.Diagnostics.CodeAnalysis;
+using System.Diagnostics.CodeAnalysis;
+using System.Drawing;
 using Toolkit.Foundation;
+using Windows.Win32;
+using Windows.Win32.Foundation;
+using Windows.Win32.Graphics.Gdi;
+using Windows.Win32.UI.WindowsAndMessaging;
 
 namespace Toolkit.Windows;
 
+public class WndProcMonitor(IPublisher publisher) : 
+    IWndProcMonitor
+{
+    private WNDPROC? handler;
+    private readonly IPublisher publisher = publisher;
+
+    public IntPtr Handle { get; private set; }
+
+    public void Dispose()
+    {
+        PInvoke.DestroyWindow((HWND)Handle);
+    }
+
+    private unsafe void InitializeWndProc()
+    {
+        var windowName = Guid.NewGuid().ToString();
+        handler = Wndproc;
+
+        WNDCLASSW wndProcWindow;
+
+        wndProcWindow.style = 0;
+        wndProcWindow.lpfnWndProc = handler;
+        wndProcWindow.cbClsExtra = 0;
+        wndProcWindow.cbWndExtra = 0;
+        wndProcWindow.hInstance = new HINSTANCE();
+        wndProcWindow.hIcon = new HICON();
+        wndProcWindow.hCursor = new HCURSOR();
+        wndProcWindow.hbrBackground = new HBRUSH();
+
+        fixed (char* menuName = "")
+        {
+            wndProcWindow.lpszMenuName = new PCWSTR(menuName);
+        }
+
+        fixed (char* className = windowName)
+        {
+            wndProcWindow.lpszClassName = new PCWSTR(className);
+        }
+
+        PInvoke.RegisterClass(wndProcWindow);
+        Handle = PInvoke.CreateWindowEx(0, wndProcWindow.lpszClassName, 
+            new PCWSTR(), 0, 0, 0, 0, 0, new HWND(),
+            new HMENU(),
+            new HINSTANCE());
+    }
+
+    private LRESULT Wndproc(HWND param0, uint param1, WPARAM param2, LPARAM param3)
+    {
+        publisher.Publish(new WndProcEventArgs(param1, (uint)param2.Value, (uint)param3.Value));
+        return PInvoke.DefWindowProc(param0, param1, param2, param3);
+    }
+
+    public void Initialize()
+    {
+        InitializeWndProc();
+    }
+}
+
 
 public class PointerMonitor(IPublisher publisher) : 
     IPointerMonitor
diff --git a/Toolkit.Windows/WndProcEventArgs.cs b/Toolkit.Windows/WndProcEventArgs.cs
new file mode 100644
index 0000000..d52724c
--- /dev/null
+++ b/Toolkit.Windows/WndProcEventArgs.cs
@@ -0,0 +1,3 @@
+namespace Toolkit.Windows;
+
+public record WndProcEventArgs(uint Message, uint WParam, uint LParam);