CurrentProfile detected in loadedProfiles

Fixed up some broken logic around detecting
loadedProfiles as the currentProfile. Now when
we load the profiles from disk we also correctly
check whether one of the profiles is in use now
and if it is then we use that profile instead of
creating a new one.

HeliosPlus.Shared/ProfileRepository.cs

@@ -39,16 +39,15 @@ namespace HeliosPlus.Shared
         private static List<ProfileItem> _allProfiles = new List<ProfileItem>();
         private static bool _profilesLoaded = false;
         public static Version Version = new Version(1, 0, 0);
+        private static ProfileItem _currentProfile;
+
         // Other constants that are useful
         public static string AppDataPath = System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "HeliosPlus");
         public static string AppIconPath = System.IO.Path.Combine(AppDataPath, $"Icons");
         public static string AppHeliosPlusIconFilename = System.IO.Path.Combine(AppIconPath, @"HeliosPlus.ico");
         private static string AppProfileStoragePath = System.IO.Path.Combine(AppDataPath, $"Profiles");
         private static string _profileStorageJsonFileName = System.IO.Path.Combine(AppProfileStoragePath, $"DisplayProfiles_{Version.ToString(2)}.json");
-        private static uint _lastProfileId;
-        private static ProfileItem _currentProfile;
-        //private static List<Display> _availableDisplays;
-        //private static List<UnAttachedDisplay> _unavailableDisplays;
+
 
         #endregion
 
@@ -94,7 +93,8 @@ namespace HeliosPlus.Shared
         {
             get 
             {
-                UpdateActiveProfile();
+                if (_currentProfile == null)
+                    UpdateActiveProfile();
                 return _currentProfile;
             }
             set
@@ -298,6 +298,20 @@ namespace HeliosPlus.Shared
 
         }
 
+        public static bool ContainsCurrentProfile()
+        {
+            if (!(_currentProfile is ProfileItem))
+                return false;
+
+            foreach (ProfileItem testProfile in _allProfiles)
+            {
+                if (testProfile.Paths.SequenceEqual(_currentProfile.Paths))
+                    return true;
+            }
+
+            return false;
+        }
+
         public static ProfileItem GetProfile(string ProfileNameOrId)
         {
             if (String.IsNullOrWhiteSpace(ProfileNameOrId))
@@ -369,7 +383,7 @@ namespace HeliosPlus.Shared
             {
                 foreach (ProfileItem loadedProfile in ProfileRepository.AllProfiles)
                 {
-                    if (activeProfile.Equals(loadedProfile))
+                    if (activeProfile.Paths.SequenceEqual(loadedProfile.Paths))
                     {
                         _currentProfile = loadedProfile;
                         return;
@@ -383,7 +397,7 @@ namespace HeliosPlus.Shared
 
         public static ProfileItem GetActiveProfile()
         {
-            UpdateActiveProfile();
+            //UpdateActiveProfile();
 
             if (!(_currentProfile is ProfileItem))
                 return null;
@@ -392,7 +406,7 @@ namespace HeliosPlus.Shared
 
         public static bool IsActiveProfile(ProfileItem profile)
         {
-            UpdateActiveProfile();
+            //UpdateActiveProfile();
 
             if (!(_currentProfile is ProfileItem))
                 return false;
@@ -400,7 +414,7 @@ namespace HeliosPlus.Shared
             if (!(profile is ProfileItem))
                 return false;
 
-            if (profile.Equals(_currentProfile))
+            if (profile.Paths.SequenceEqual(_currentProfile.Paths))
                 return true;
 
             return false;

HeliosPlus.Shared/Topology/Path.cs

@@ -119,7 +119,7 @@ namespace HeliosPlus.Shared.Topology
     }
 
     // Custom comparer for the ProfileViewport class
-    class ProfileViewportComparer : IEqualityComparer<Path>
+    class PathComparer : IEqualityComparer<Path>
     {
         // Products are equal if their names and product numbers are equal.
         public bool Equals(Path x, Path y)

HeliosPlus/DeviceNotification.cs

@@ -0,0 +1,149 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace HeliosPlus
+{
+    internal static class DeviceNotification
+    {
+        #region Constants & types
+
+        public const int DbtDeviceArrival = 0x8000; // System detected a new device        
+        public const int DbtDeviceRemoveComplete = 0x8004; // Device is gone      
+        public const int WmDeviceChange = 0x0219; // Device change event      
+
+        #endregion
+
+        #region Methods
+
+        public static bool IsMonitor(IntPtr lParam)
+        {
+            return IsDeviceOfClass(lParam, GuidDeviceInterfaceMonitorDevice);
+        }
+
+        public static bool IsUsbDevice(IntPtr lParam)
+        {
+            return IsDeviceOfClass(lParam, GuidDeviceInterfaceUSBDevice);
+        }
+
+        /// Registers a window to receive notifications when Monitor devices are plugged or unplugged.
+        public static void RegisterMonitorDeviceNotification(IntPtr windowHandle)
+        {
+            var dbi = CreateBroadcastDeviceInterface(GuidDeviceInterfaceMonitorDevice);
+            monitorNotificationHandle = RegisterDeviceNotification(dbi, windowHandle);
+        }
+
+        /// Registers a window to receive notifications when USB devices are plugged or unplugged.
+        public static void RegisterUsbDeviceNotification(IntPtr windowHandle)
+        {
+            var dbi = CreateBroadcastDeviceInterface(GuidDeviceInterfaceUSBDevice);
+            usbNotificationHandle = RegisterDeviceNotification(dbi, windowHandle);
+        }
+
+        /// UnRegisters the window for Monitor device notifications
+        public static void UnRegisterMonitorDeviceNotification()
+        {
+            UnregisterDeviceNotification(monitorNotificationHandle);
+        }
+
+        /// UnRegisters the window for USB device notifications
+        public static void UnRegisterUsbDeviceNotification()
+        {
+            UnregisterDeviceNotification(usbNotificationHandle);
+        }
+
+        #endregion
+
+        #region Private or protected constants & types
+
+        private const int DbtDeviceTypeDeviceInterface = 5;
+
+        // https://docs.microsoft.com/en-us/windows-hardware/drivers/install/guid-devinterface-usb-device
+        private static readonly Guid GuidDeviceInterfaceUSBDevice = new Guid("A5DCBF10-6530-11D2-901F-00C04FB951ED"); // USB devices
+
+        // https://docs.microsoft.com/en-us/windows-hardware/drivers/install/guid-devinterface-monitor
+        private static readonly Guid GuidDeviceInterfaceMonitorDevice = new Guid("E6F07B5F-EE97-4a90-B076-33F57BF4EAA7"); // Monitor devices
+        private static IntPtr usbNotificationHandle;
+        private static IntPtr monitorNotificationHandle;
+
+        [StructLayout(LayoutKind.Sequential)]
+        private struct DevBroadcastDeviceInterface
+        {
+            internal int Size;
+            internal int DeviceType;
+            internal int Reserved;
+            internal Guid ClassGuid;
+            internal short Name;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        private struct DevBroadcastHdr
+        {
+            internal UInt32 Size;
+            internal UInt32 DeviceType;
+            internal UInt32 Reserved;
+        }
+
+        #endregion
+
+        #region Private & protected methods
+
+        private static bool IsDeviceOfClass(IntPtr lParam, Guid classGuid)
+        {
+            var hdr = Marshal.PtrToStructure<DevBroadcastHdr>(lParam);
+            if (hdr.DeviceType != DbtDeviceTypeDeviceInterface)
+                return false;
+
+            var devIF = Marshal.PtrToStructure<DevBroadcastDeviceInterface>(lParam);
+
+            return devIF.ClassGuid == classGuid;
+
+        }
+
+        private static DevBroadcastDeviceInterface CreateBroadcastDeviceInterface(Guid classGuid)
+        {
+            var dbi = new DevBroadcastDeviceInterface
+            {
+                DeviceType = DbtDeviceTypeDeviceInterface,
+                Reserved = 0,
+                ClassGuid = classGuid,
+                Name = 0
+            };
+
+            dbi.Size = Marshal.SizeOf(dbi);
+
+            return dbi;
+        }
+
+        private static IntPtr RegisterDeviceNotification(DevBroadcastDeviceInterface dbi, IntPtr windowHandle)
+        {
+            var buffer = Marshal.AllocHGlobal(dbi.Size);
+            IntPtr handle;
+
+            try
+            {
+                Marshal.StructureToPtr(dbi, buffer, true);
+
+                handle = RegisterDeviceNotification(windowHandle, buffer, 0);
+            }
+            finally
+            {
+                // Free buffer
+                Marshal.FreeHGlobal(buffer);
+            }
+
+            return handle;
+        }
+
+        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+        private static extern IntPtr RegisterDeviceNotification(IntPtr recipient, IntPtr notificationFilter, int flags);
+
+        [DllImport("user32.dll")]
+        private static extern bool UnregisterDeviceNotification(IntPtr handle);
+
+        #endregion
+    }
+}

HeliosPlus/HeliosPlus.csproj

@@ -73,6 +73,7 @@
     <Reference Include="System.Xml.Serialization" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="DeviceNotification.cs" />
     <Compile Include="GameLibraries\SteamAppInfoParser\AppInfo.cs" />
     <Compile Include="GameLibraries\SteamAppInfoParser\EUniverse.cs" />
     <Compile Include="GameLibraries\SteamAppInfoParser\Package.cs" />

HeliosPlus/UIForms/DisplayProfileForm.cs

@@ -8,6 +8,7 @@ using HeliosPlus.Resources;
 using HeliosPlus.Shared;
 using Manina.Windows.Forms;
 using System.Text.RegularExpressions;
+using System.Diagnostics;
 
 namespace HeliosPlus.UIForms
 {
@@ -146,21 +147,19 @@ namespace HeliosPlus.UIForms
             // alter their Windows Display settings then come back to our app
             // and the app will automatically recognise that things have changed.
 
-            /*// Reload the profiles in case we swapped to another program to change it
-            ProfileRepository.UpdateCurrentProfile();
+            // Reload the profiles in case we swapped to another program to change it
+            //ChangeSelectedProfile(ProfileRepository.CurrentProfile);
             // Refresh the Profile UI
-            RefreshDisplayProfileUI();*/
+            //RefreshDisplayProfileUI();
         }
 
         private void DisplayProfileForm_Load(object sender, EventArgs e)
         {
-            // Load all the profiles to prepare things
-            //_savedProfiles = ProfileRepository.AllProfiles;
+            
             // Update the Current Profile
-            //ProfileRepository.UpdateCurrentProfile();
-            //    ProfileRepository.GetActiveProfile();
-            // Change to the current selected Profile
-            ChangeSelectedProfile(ProfileRepository.GetActiveProfile());
+            ProfileRepository.UpdateActiveProfile();
+
+            ChangeSelectedProfile(ProfileRepository.CurrentProfile);
 
             // Refresh the Profile UI
             RefreshDisplayProfileUI();
@@ -178,7 +177,7 @@ namespace HeliosPlus.UIForms
             // And update the save/rename textbox
             txt_profile_save_name.Text = _selectedProfile.Name;
 
-            if (ProfileRepository.ContainsProfile(_selectedProfile))
+            if (ProfileRepository.ContainsProfile(profile))
             {
                 // we already have the profile stored
                 _saveOrRenameMode = "rename";
@@ -341,5 +340,81 @@ namespace HeliosPlus.UIForms
                 
             }
         }
+
+        protected override void WndProc(ref Message m)
+        {
+            const int WM_DISPLAYCHANGE = 0x007E;
+
+            const int x_bitshift = 0;
+            const int y_bitshift = 16;
+            const int xy_mask = 0xFFFF;
+
+            bool displayChange = false;
+
+            switch (m.Msg)
+            {
+                case WM_DISPLAYCHANGE:
+                    ProfileRepository.UpdateActiveProfile();
+                    break;
+            }
+
+            base.WndProc(ref m);
+        }
+
+        /*private static void MainWindow_Closed(object sender, EventArgs e)
+        {
+            DeviceNotification.UnRegisterUsbDeviceNotification();
+            DeviceNotification.UnRegisterMonitorDeviceNotification();
+        }
+
+        protected override void OnSourceInitialized(EventArgs e)
+        {
+            base.OnSourceInitialized(e);
+
+            if (!(PresentationSource.FromVisual(this) is HwndSource source))
+                return;
+
+            source.AddHook(this.WndProc);
+
+            DeviceNotification.RegisterUsbDeviceNotification(source.Handle);
+            DeviceNotification.RegisterMonitorDeviceNotification(source.Handle);
+        }*/
+
+        // Notification registeration for display detection from here http://codetips.nl/detectmonitor.html
+
+        /*protected override void WndProc(ref Message m)
+        {
+            const int WM_SETTINGCHANGE = 0x001A;
+            const int SPI_SETWORKAREA = 0x02F;
+            const int WM_DISPLAYCHANGE = 0x007E;
+            const int WM_DEVICECHANGE = 0x0219; // WM Device change message ID
+            const int DBT_DEVICEARRIVAL = 0x8000; // WM Device Change Event: System detected a new device        
+            const int DBT_DEVICEREMOVECOMPLETE = 0x8004; // WM Device Change Event: Device is gone      
+
+
+            const int x_bitshift = 0;
+            const int y_bitshift = 16;
+            const int xy_mask = 0xFFFF;
+
+            bool displayChange = false;
+
+            switch (m.Msg)
+            {
+                case WM_DISPLAYCHANGE:
+                case DeviceNotification.DbtDeviceRemoveComplete:
+                case DeviceNotification.DbtDeviceArrival:
+                    {
+                        if (DeviceNotification.IsMonitor(lParam))
+                            Debug.WriteLine($"Monitor {((int)wParam == DeviceNotification.DbtDeviceArrival ? "arrived" : "removed")}");
+
+                        if (DeviceNotification.IsUsbDevice(lParam))
+                            Debug.WriteLine($"Usb device {((int)wParam == DeviceNotification.DbtDeviceArrival ? "arrived" : "removed")}");
+                    }
+                    break;
+            }
+
+            base.WndProc(ref m);
+        }*/
+
     }
 }