SharpDisplayManager: Server/MainForm.Hid.cs@fef4ca058087

     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 MainFormHid : 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[5];

    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 = Const.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 = Const.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 = Const.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 = Const.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 = Const.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 = Const.RIDEV_EXINPUTSINK;

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

    81             //i++;

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

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

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

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

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

    89             if (!iHidHandler.IsRegistered)

    90             {

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

    92             }

    93             iHidHandler.OnHidEvent += HandleHidEventThreadSafe;

    95         }

   100         /// <summary>

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

   102         /// </summary>

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

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

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

   106         {

   107             if (aHidEvent.IsStray)

   108             {

   109                 //Stray event just ignore it

   110                 return;

   111             }

   113             if (this.InvokeRequired)

   114             {

   115                 //Not in the proper thread, invoke ourselves

   116                 OnHidEventDelegate d = new OnHidEventDelegate(HandleHidEventThreadSafe);

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

   118             }

   119             else

   120             {

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

   122                 {

   123                     //No usage, nothing to do then

   124                     return;

   125                 }

   127                 //We are in the proper thread

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

   129                 {

   130                     switch (aHidEvent.Usages[0])

   131                     {

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

   133                             HandleGreenStart();

   134                             break;

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

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

   137                             HandleEject();

   138                             break;

   139                     }

   140                 }

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

   143                 if (aHidEvent.UsagePage == (ushort)Hid.UsagePage.Consumer && aHidEvent.Usages[0] == (ushort)Hid.Usage.ConsumerControl.ThinkPadFullscreenMagnifier)

   144                 {

   145                     HandleEject();

   146                 }

   148             }

   149         }

   151         /// <summary>

   152         ///

   153         /// </summary>

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

   155         private void CheckLastError(string aPrefix)

   156         {

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

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

   159         }

   161         /// <summary>

   162         ///

   163         /// </summary>

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

   165         /// <returns></returns>

   166         private IntPtr MarshalToPointer(object data)

   167         {

   168             IntPtr buf = Marshal.AllocHGlobal(

   169                 Marshal.SizeOf(data));

   170             Marshal.StructureToPtr(data,

   171                 buf, false);

   172             return buf;

   173         }

   175         /// <summary>

   176         ///

   177         /// </summary>

   178         /// <returns></returns>

   179         private SafeFileHandle OpenVolume(string aDriveName)

   180         {

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

   182                                SharpLib.Win32.FileAccess.GENERIC_READ,

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

   184                                IntPtr.Zero,

   185                                CreationDisposition.OPEN_EXISTING,

   186                                0,

   187                                IntPtr.Zero);

   188         }

   190         /// <summary>

   191         ///

   192         /// </summary>

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

   194         /// <returns></returns>

   195         private bool LockVolume(SafeFileHandle aVolume)

   196         {

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

   198             IntPtr dwBytesReturned=new IntPtr();

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

   200             OVERLAPPED overlapped=new OVERLAPPED();

   202             int tries = 0;

   203             const int KMaxTries = 100;

   204             const int KSleepTime = 10;

   205             bool success = false;

   207             while (!success && tries < KMaxTries)

   208             {

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

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

   211                 tries++;

   212             }

   214             CheckLastError("Lock volume: ");

   216             return success;

   217         }

   219         /// <summary>

   220         ///

   221         /// </summary>

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

   223         /// <returns></returns>

   224         private bool DismountVolume(SafeFileHandle aVolume)

   225         {

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

   227             IntPtr dwBytesReturned = new IntPtr();

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

   229             OVERLAPPED overlapped=new OVERLAPPED();

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

   232             CheckLastError("Dismount volume: ");

   233             return res;

   234         }

   238         /// <summary>

   239         ///

   240         /// </summary>

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

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

   243         /// <returns></returns>

   244         private bool PreventRemovalOfVolume(SafeFileHandle aVolume, bool aPreventRemoval)

   245         {

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

   247             IntPtr dwBytesReturned = new IntPtr();

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

   249             OVERLAPPED overlapped = new OVERLAPPED();

   250             //

   251             PREVENT_MEDIA_REMOVAL preventMediaRemoval = new PREVENT_MEDIA_REMOVAL();

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

   253             IntPtr preventMediaRemovalParam = MarshalToPointer(preventMediaRemoval);

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

   256             CheckLastError("Media removal: ");

   257             Marshal.FreeHGlobal(preventMediaRemovalParam);

   259             return result;

   260         }

   262         /// <summary>

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

   264         /// </summary>

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

   266         /// <returns></returns>

   267         private bool MediaEject(SafeFileHandle aVolume)

   268         {

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

   270             IntPtr dwBytesReturned = new IntPtr();

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

   272             OVERLAPPED overlapped=new OVERLAPPED();

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

   275             CheckLastError("Media eject: ");

   276             return res;

   277         }

   279         /// <summary>

   280         /// Close an optical drive tray.

   281         /// </summary>

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

   283         /// <returns></returns>

   284         private bool MediaLoad(SafeFileHandle aVolume)

   285         {

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

   287             IntPtr dwBytesReturned = new IntPtr();

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

   289             OVERLAPPED overlapped=new OVERLAPPED();

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

   292             CheckLastError("Media load: ");

   293             return res;

   294         }

   296         /// <summary>

   297         ///

   298         /// </summary>

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

   300         /// <returns></returns>

   301         private bool StorageCheckVerify(SafeFileHandle aVolume)

   302         {

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

   304             IntPtr dwBytesReturned = new IntPtr();

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

   306             OVERLAPPED overlapped = new OVERLAPPED();

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

   310             CheckLastError("Check verify: ");

   312             return res;

   313         }

   317         /// <summary>

   318         /// Perform media ejection.

   319         /// </summary>

   320         private void HandleEject()

   321         {

   322             string drive = ((MainForm)this).OpticalDriveToEject();

   323             if (drive.Length!=2)

   324             {

   325                 //Not a proper drive spec.

   326                 //Probably 'None' selected.

   327                 return;

   328             }

   330             SafeFileHandle handle = OpenVolume(drive);

   331             if (handle.IsInvalid)

   332             {

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

   334                 return;

   335             }

   337             if (LockVolume(handle) && DismountVolume(handle))

   338             {

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

   341                 if (PreventRemovalOfVolume(handle,false))

   342                 {

   343                     //StorageCheckVerify(handle);

   345                     DateTime before;

   346                     before = DateTime.Now;

   347                     bool ejectSuccess = MediaEject(handle);

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

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

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

   352                     if (ejectSuccess && ms > 100)

   353                     {

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

   355                     }

   356                     else if (MediaLoad(handle))

   357                     {

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

   359                     }

   360                 }

   361             }

   362             else

   363             {

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

   365             }

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

   368             handle.Dispose();

   369         }

   371         /// <summary>

   372         ///

   373         /// </summary>

   374         private void HandleGreenStart()

   375         {

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

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

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

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

   380             {

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

   382                 ProcessStartInfo start = new ProcessStartInfo();

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

   384                 //start.Arguments = arguments;

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

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

   387                 start.WindowStyle = ProcessWindowStyle.Normal;

   388                 start.CreateNoWindow = true;

   389                 start.UseShellExecute = true;

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

   391                 Process proc = Process.Start(start);

   393                 //SL: We could have used that too

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

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

   396             }

   397             else

   398             {

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

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

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

   402             }

   403         }

   406         /// <summary>

   407         /// We need to handle WM_INPUT.

   408         /// </summary>

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

   410         protected override void WndProc(ref Message message)

   411         {

   412             switch (message.Msg)

   413             {

   414                 case Const.WM_INPUT:

   415                     //Returning zero means we processed that message.

   416                     message.Result = new IntPtr(0);

   417                     iHidHandler.ProcessInput(ref message);

   418                     break;

   419             }

   421             //Pass this on to base class.

   422             base.WndProc(ref message);

   423         }

   424     }

   425 }

author	StephaneLenclud
	Fri, 22 Jul 2016 18:19:49 +0200
changeset 209	fef4ca058087
parent 161	7b19bea5d73a
permissions	-rw-r--r--