SharpDisplayManager: Server/FormMain.Hid.cs@2e4d2558bb21

     1 using System;

     2 using System.IO;

     3 using System.Collections.Generic;

     4 using System.Linq;

     5 using System.Text;

     6 using System.Threading.Tasks;

     7 using System.Diagnostics;

     8 using System.Runtime.InteropServices;

     9 using System.Windows.Forms;

    10 using Microsoft.Win32.SafeHandles;

    11 using System.ComponentModel;

    12 //

    13 using Hid = SharpLib.Hid;

    14 using SharpLib.Win32;

    16 namespace SharpDisplayManager

    17 {

    18     /// <summary>

    19     /// Implement handling of HID input reports notably to be able to launch an application using the Green Start button from IR remotes.

    20     /// </summary>

    21     [System.ComponentModel.DesignerCategory("Code")]

    22     public class FormMainHid : Form

    23     {

    24         [System.Runtime.InteropServices.DllImportAttribute("user32.dll", EntryPoint = "SwitchToThisWindow")]

    25         public static extern void SwitchToThisWindow([System.Runtime.InteropServices.InAttribute()] System.IntPtr hwnd, [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.Bool)] bool fUnknown);

    26         //

    27         public delegate void OnHidEventDelegate(object aSender, Hid.Event aHidEvent);

    29         /// <summary>

    30         /// Use notably to handle green start key from IR remote control

    31         /// </summary>

    32         private Hid.Handler iHidHandler;

    34         /// <summary>

    35         /// Register HID devices so that we receive corresponding WM_INPUT messages.

    36         /// </summary>

    37         protected void RegisterHidDevices()

    38         {

    39             // Register the input device to receive the commands from the

    40             // remote device. See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmt/html/remote_control.asp

    41             // for the vendor defined usage page.

    43             RAWINPUTDEVICE[] rid = new RAWINPUTDEVICE[6];

    45             int i = 0;

    46             rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.WindowsMediaCenterRemoteControl;

    47             rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.WindowsMediaCenter.WindowsMediaCenterRemoteControl;

    48             rid[i].dwFlags = RawInputDeviceFlags.RIDEV_INPUTSINK;

    49             rid[i].hwndTarget = Handle;

    51             i++;

    52             rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.Consumer;

    53             rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.Consumer.ConsumerControl;

    54             rid[i].dwFlags = RawInputDeviceFlags.RIDEV_INPUTSINK;

    55             rid[i].hwndTarget = Handle;

    57             i++;

    58             rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.Consumer;

    59             rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.Consumer.Selection;

    60             rid[i].dwFlags = RawInputDeviceFlags.RIDEV_INPUTSINK;

    61             rid[i].hwndTarget = Handle;

    63             i++;

    64             rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.GenericDesktopControls;

    65             rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.GenericDesktop.SystemControl;

    66             rid[i].dwFlags = RawInputDeviceFlags.RIDEV_INPUTSINK;

    67             rid[i].hwndTarget = Handle;

    69             i++;

    70             rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.GenericDesktopControls;

    71             rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.GenericDesktop.GamePad;

    72             rid[i].dwFlags = RawInputDeviceFlags.RIDEV_INPUTSINK;

    73             rid[i].hwndTarget = Handle;

    75             i++;

    76             rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.GenericDesktopControls;

    77             rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.GenericDesktop.Keyboard;

    78             rid[i].dwFlags = RawInputDeviceFlags.RIDEV_INPUTSINK;

    79             rid[i].hwndTarget = Handle;

    81             //i++;

    82             //rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.GenericDesktopControls;

    83             //rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.GenericDesktop.Keyboard;

    84             //rid[i].dwFlags = Const.RIDEV_EXINPUTSINK;

    85             //rid[i].hwndTarget = Handle;

    87             //i++;

    88             //rid[i].usUsagePage = (ushort)Hid.UsagePage.GenericDesktopControls;

    89             //rid[i].usUsage = (ushort)Hid.UsageCollection.GenericDesktop.Mouse;

    90             //rid[i].dwFlags = Const.RIDEV_EXINPUTSINK;

    91             //rid[i].hwndTarget = aHWND;

    94             iHidHandler = new SharpLib.Hid.Handler(rid);

    95             if (!iHidHandler.IsRegistered)

    96             {

    97                 Debug.WriteLine("Failed to register raw input devices: " + Marshal.GetLastWin32Error().ToString());

    98             }

    99             iHidHandler.OnHidEvent += HandleHidEventThreadSafe;

   101         }

   106         /// <summary>

   107         /// Here we receive HID events from our HID library.

   108         /// </summary>

   109         /// <param name="aSender"></param>

   110         /// <param name="aHidEvent"></param>

   111         public void HandleHidEventThreadSafe(object aSender, SharpLib.Hid.Event aHidEvent)

   112         {

   113             if (aHidEvent.IsStray || !aHidEvent.IsValid)

   114             {

   115                 //Stray event just ignore it

   116                 return;

   117             }

   119             if (this.InvokeRequired)

   120             {

   121                 //Not in the proper thread, invoke ourselves

   122                 OnHidEventDelegate d = new OnHidEventDelegate(HandleHidEventThreadSafe);

   123                 this.Invoke(d, new object[] { aSender, aHidEvent });

   124             }

   125             else

   126             {

   127                 if (aHidEvent.IsGeneric)

   128                 {

   129                     if (aHidEvent.Usages.Count == 0)

   130                     {

   131                         //No usage, nothing to do then

   132                         return;

   133                     }

   135                     //We are in the proper thread

   136                     if (aHidEvent.UsagePage == (ushort) Hid.UsagePage.WindowsMediaCenterRemoteControl)

   137                     {

   138                         //Trigger events as needed

   139                         EventHidWindowsMediaCenter e = new EventHidWindowsMediaCenter

   140                         {

   141                             Usage = (Hid.Usage.WindowsMediaCenterRemoteControl) aHidEvent.Usages[0]

   142                         };

   143                         Properties.Settings.Default.EarManager.TriggerEvent(e);

   145                         //Old legacy hard coded stuff

   146                         //TODO: remove it

   147                         switch (aHidEvent.Usages[0])

   148                         {

   149                             case (ushort) Hid.Usage.WindowsMediaCenterRemoteControl.GreenStart:

   150                                 HandleGreenStart();

   151                                 break;

   152                             case (ushort) Hid.Usage.WindowsMediaCenterRemoteControl.Eject:

   153                             case (ushort) Hid.Usage.WindowsMediaCenterRemoteControl.Ext2:

   154                                 HandleEject();

   155                                 break;

   156                         }

   157                     }

   158                     else if (aHidEvent.UsagePage == (ushort) Hid.UsagePage.Consumer)

   159                     {

   160                         //Trigger matching events if any

   161                         EventHidConsumerControl e = new EventHidConsumerControl

   162                         {

   163                             Usage = (Hid.Usage.ConsumerControl) aHidEvent.Usages[0]

   164                         };

   165                         Properties.Settings.Default.EarManager.TriggerEvent(e);

   167                         //Keep this for debug when only ThinkPad keyboard is available

   168                         //if (aHidEvent.Usages[0] == (ushort)Hid.Usage.ConsumerControl.ThinkPadFullscreenMagnifier)

   169                         //{

   170                         //    HandleEject();

   171                         //}

   172                     }

   173                 }

   174                 else if (aHidEvent.IsKeyboard)

   175                 {

   176                     //Trigger matching events if any

   177                     EventHidKeyboard e = new EventHidKeyboard

   178                     {

   179                         Key = aHidEvent.VirtualKey,

   180                         IsKeyUp = aHidEvent.IsButtonUp,

   181                         HasModifierAlt = aHidEvent.HasModifierAlt,

   182                         HasModifierControl = aHidEvent.HasModifierControl,

   183                         HasModifierShift = aHidEvent.HasModifierShift,

   184                         HasModifierWindows = aHidEvent.HasModifierWindows,

   185                     };

   186                     Properties.Settings.Default.EarManager.TriggerEvent(e);

   187                 }

   189             }

   190         }

   192         /// <summary>

   193         ///

   194         /// </summary>

   195         /// <param name="aPrefix"></param>

   196         private void CheckLastError(string aPrefix)

   197         {

   198             string errorMessage = new Win32Exception(Marshal.GetLastWin32Error()).Message;

   199             Debug.WriteLine(aPrefix + Marshal.GetLastWin32Error().ToString() + ": " + errorMessage);

   200         }

   202         /// <summary>

   203         ///

   204         /// </summary>

   205         /// <param name="data"></param>

   206         /// <returns></returns>

   207         private IntPtr MarshalToPointer(object data)

   208         {

   209             IntPtr buf = Marshal.AllocHGlobal(

   210                 Marshal.SizeOf(data));

   211             Marshal.StructureToPtr(data,

   212                 buf, false);

   213             return buf;

   214         }

   216         /// <summary>

   217         ///

   218         /// </summary>

   219         /// <returns></returns>

   220         private SafeFileHandle OpenVolume(string aDriveName)

   221         {

   222             return Function.CreateFile("\\\\.\\" + aDriveName,

   223                                SharpLib.Win32.FileAccess.GENERIC_READ,

   224                                SharpLib.Win32.FileShare.FILE_SHARE_READ | SharpLib.Win32.FileShare.FILE_SHARE_WRITE,

   225                                IntPtr.Zero,

   226                                CreationDisposition.OPEN_EXISTING,

   227                                0,

   228                                IntPtr.Zero);

   229         }

   231         /// <summary>

   232         ///

   233         /// </summary>

   234         /// <param name="aVolume"></param>

   235         /// <returns></returns>

   236         private bool LockVolume(SafeFileHandle aVolume)

   237         {

   238             //Hope that's doing what I think it does

   239             IntPtr dwBytesReturned=new IntPtr();

   240             //Should not be needed but I'm not sure how to pass NULL in there.

   241             OVERLAPPED overlapped=new OVERLAPPED();

   243             int tries = 0;

   244             const int KMaxTries = 100;

   245             const int KSleepTime = 10;

   246             bool success = false;

   248             while (!success && tries < KMaxTries)

   249             {

   250                 success = Function.DeviceIoControl(aVolume, Const.FSCTL_LOCK_VOLUME, IntPtr.Zero, 0, IntPtr.Zero, 0, dwBytesReturned, ref overlapped);

   251                 System.Threading.Thread.Sleep(KSleepTime);

   252                 tries++;

   253             }

   255             CheckLastError("Lock volume: ");

   257             return success;

   258         }

   260         /// <summary>

   261         ///

   262         /// </summary>

   263         /// <param name="aVolume"></param>

   264         /// <returns></returns>

   265         private bool DismountVolume(SafeFileHandle aVolume)

   266         {

   267             //Hope that's doing what I think it does

   268             IntPtr dwBytesReturned = new IntPtr();

   269             //Should not be needed but I'm not sure how to pass NULL in there.

   270             OVERLAPPED overlapped=new OVERLAPPED();

   272             bool res = Function.DeviceIoControl(aVolume, Const.FSCTL_DISMOUNT_VOLUME, IntPtr.Zero, 0, IntPtr.Zero, 0, dwBytesReturned, ref overlapped);

   273             CheckLastError("Dismount volume: ");

   274             return res;

   275         }

   279         /// <summary>

   280         ///

   281         /// </summary>

   282         /// <param name="aVolume"></param>

   283         /// <param name="aPreventRemoval"></param>

   284         /// <returns></returns>

   285         private bool PreventRemovalOfVolume(SafeFileHandle aVolume, bool aPreventRemoval)

   286         {

   287             //Hope that's doing what I think it does

   288             IntPtr dwBytesReturned = new IntPtr();

   289             //Should not be needed but I'm not sure how to pass NULL in there.

   290             OVERLAPPED overlapped = new OVERLAPPED();

   291             //

   292             PREVENT_MEDIA_REMOVAL preventMediaRemoval = new PREVENT_MEDIA_REMOVAL();

   293             preventMediaRemoval.PreventMediaRemoval = Convert.ToByte(aPreventRemoval);

   294             IntPtr preventMediaRemovalParam = MarshalToPointer(preventMediaRemoval);

   296             bool result = Function.DeviceIoControl(aVolume, Const.IOCTL_STORAGE_MEDIA_REMOVAL, preventMediaRemovalParam, Convert.ToUInt32(Marshal.SizeOf(preventMediaRemoval)), IntPtr.Zero, 0, dwBytesReturned, ref overlapped);

   297             CheckLastError("Media removal: ");

   298             Marshal.FreeHGlobal(preventMediaRemovalParam);

   300             return result;

   301         }

   303         /// <summary>

   304         /// Eject optical drive media opening the tray if any.

   305         /// </summary>

   306         /// <param name="aVolume"></param>

   307         /// <returns></returns>

   308         private bool MediaEject(SafeFileHandle aVolume)

   309         {

   310             //Hope that's doing what I think it does

   311             IntPtr dwBytesReturned = new IntPtr();

   312             //Should not be needed but I'm not sure how to pass NULL in there.

   313             OVERLAPPED overlapped=new OVERLAPPED();

   315             bool res = Function.DeviceIoControl(aVolume, Const.IOCTL_STORAGE_EJECT_MEDIA, IntPtr.Zero, 0, IntPtr.Zero, 0, dwBytesReturned, ref overlapped);

   316             CheckLastError("Media eject: ");

   317             return res;

   318         }

   320         /// <summary>

   321         /// Close an optical drive tray.

   322         /// </summary>

   323         /// <param name="aVolume"></param>

   324         /// <returns></returns>

   325         private bool MediaLoad(SafeFileHandle aVolume)

   326         {

   327             //Hope that's doing what I think it does

   328             IntPtr dwBytesReturned = new IntPtr();

   329             //Should not be needed but I'm not sure how to pass NULL in there.

   330             OVERLAPPED overlapped=new OVERLAPPED();

   332             bool res = Function.DeviceIoControl(aVolume, Const.IOCTL_STORAGE_LOAD_MEDIA, IntPtr.Zero, 0, IntPtr.Zero, 0, dwBytesReturned, ref overlapped);

   333             CheckLastError("Media load: ");

   334             return res;

   335         }

   337         /// <summary>

   338         ///

   339         /// </summary>

   340         /// <param name="aVolume"></param>

   341         /// <returns></returns>

   342         private bool StorageCheckVerify(SafeFileHandle aVolume)

   343         {

   344             //Hope that's doing what I think it does

   345             IntPtr dwBytesReturned = new IntPtr();

   346             //Should not be needed but I'm not sure how to pass NULL in there.

   347             OVERLAPPED overlapped = new OVERLAPPED();

   349             bool res = Function.DeviceIoControl(aVolume, Const.IOCTL_STORAGE_CHECK_VERIFY2, IntPtr.Zero, 0, IntPtr.Zero, 0, dwBytesReturned, ref overlapped);

   351             CheckLastError("Check verify: ");

   353             return res;

   354         }

   358         /// <summary>

   359         /// Perform media ejection.

   360         /// </summary>

   361         private void HandleEject()

   362         {

   363             string drive = ((FormMain)this).OpticalDriveToEject();

   364             if (drive.Length!=2)

   365             {

   366                 //Not a proper drive spec.

   367                 //Probably 'None' selected.

   368                 return;

   369             }

   371             SafeFileHandle handle = OpenVolume(drive);

   372             if (handle.IsInvalid)

   373             {

   374                 CheckLastError("ERROR: Failed to open volume: ");

   375                 return;

   376             }

   378             if (LockVolume(handle) && DismountVolume(handle))

   379             {

   380                 Debug.WriteLine("Volume was dismounted.");

   382                 if (PreventRemovalOfVolume(handle,false))

   383                 {

   384                     //StorageCheckVerify(handle);

   386                     DateTime before;

   387                     before = DateTime.Now;

   388                     bool ejectSuccess = MediaEject(handle);

   389                     double ms = (DateTime.Now - before).TotalMilliseconds;

   391                     //We assume that if it take more than a certain time to for eject to execute it means we actually ejected.

   392                     //If our eject completes too rapidly we assume the tray is already open and we will try to close it.

   393                     if (ejectSuccess && ms > 100)

   394                     {

   395                         Debug.WriteLine("Media was ejected");

   396                     }

   397                     else if (MediaLoad(handle))

   398                     {

   399                         Debug.WriteLine("Media was loaded");

   400                     }

   401                 }

   402             }

   403             else

   404             {

   405                 Debug.WriteLine("Volume lock or dismount failed.");

   406             }

   408             //This is needed to make sure we can open the volume next time around

   409             handle.Dispose();

   410         }

   412         /// <summary>

   413         ///

   414         /// </summary>

   415         private void HandleGreenStart()

   416         {

   417             //First check if the process we want to launch already exists

   418             string procName = Path.GetFileNameWithoutExtension(Properties.Settings.Default.StartFileName);

   419             Process[] existingProcesses = Process.GetProcessesByName(procName);

   420             if (existingProcesses == null || existingProcesses.Length == 0)

   421             {

   422                 // Process do not exists just try to launch it

   423                 ProcessStartInfo start = new ProcessStartInfo();

   424                 // Enter in the command line arguments, everything you would enter after the executable name itself

   425                 //start.Arguments = arguments;

   426                 // Enter the executable to run, including the complete path

   427                 start.FileName = Properties.Settings.Default.StartFileName;

   428                 start.WindowStyle = ProcessWindowStyle.Normal;

   429                 start.CreateNoWindow = true;

   430                 start.UseShellExecute = true;

   431                 // Run the external process & wait for it to finish

   432                 Process proc = Process.Start(start);

   434                 //SL: We could have used that too

   435                 //Shell32.Shell shell = new Shell32.Shell();

   436                 //shell.ShellExecute(Properties.Settings.Default.StartFileName);

   437             }

   438             else

   439             {

   440                 //This won't work properly until we have a manifest that enables uiAccess.

   441                 //However uiAccess just won't work with ClickOnce so we will have to use a different deployment system.

   442                 SwitchToThisWindow(existingProcesses[0].MainWindowHandle, true);

   443             }

   444         }

   447         /// <summary>

   448         /// We need to handle WM_INPUT.

   449         /// </summary>

   450         /// <param name="message"></param>

   451         protected override void WndProc(ref Message message)

   452         {

   453             switch (message.Msg)

   454             {

   455                 case Const.WM_INPUT:

   456                     //Returning zero means we processed that message.

   457                     message.Result = new IntPtr(0);

   458                     iHidHandler.ProcessInput(ref message);

   459                     break;

   460             }

   462             //Pass this on to base class.

   463             base.WndProc(ref message);

   464         }

   465     }

   466 }

author	StephaneLenclud
	Fri, 19 Aug 2016 19:18:54 +0200
changeset 244	2e4d2558bb21
parent 238	c92587ddabcd
child 245	448e6a616c22
permissions	-rw-r--r--