SharpDisplayManager: Server/MainForm.Hid.cs@22b327842add

     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         ///

    35         private PowerManager.SettingNotifier iPowerSettingNotifier;

    37         ///

    38         private Cec.Client iCecClient;

    40         /// <summary>

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

    42         /// </summary>

    43         protected void RegisterHidDevices()

    44         {

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

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

    47             // for the vendor defined usage page.

    49             RAWINPUTDEVICE[] rid = new RAWINPUTDEVICE[5];

    51             int i = 0;

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

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

    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.ConsumerControl;

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

    61             rid[i].hwndTarget = Handle;

    63             i++;

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

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

    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.SystemControl;

    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.GamePad;

    78             rid[i].dwFlags = Const.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             //TODO: Move this some place else

   102             iPowerSettingNotifier = new PowerManager.SettingNotifier(Handle);

   103             iPowerSettingNotifier.OnMonitorPowerOn += MonitorPowerOn;

   104             iPowerSettingNotifier.OnMonitorPowerOff += MonitorPowerOff;

   106             //CEC

   107             iCecClient = new Cec.Client();

   108             if (!iCecClient.Connect(1000))

   109             {

   110                 Debug.WriteLine("WARNING: No CEC connection!");

   111             }

   112         }

   114         void MonitorPowerOn()

   115         {

   116             Debug.WriteLine("ON");

   117             iCecClient.PowerOnDevices(CecSharp.CecLogicalAddress.Tv);

   118         }

   120         void MonitorPowerOff()

   121         {

   122             Debug.WriteLine("OFF");

   123             iCecClient.StandbyDevices(CecSharp.CecLogicalAddress.Tv);

   124         }

   127         /// <summary>

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

   129         /// </summary>

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

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

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

   133         {

   134             if (aHidEvent.IsStray)

   135             {

   136                 //Stray event just ignore it

   137                 return;

   138             }

   140             if (this.InvokeRequired)

   141             {

   142                 //Not in the proper thread, invoke ourselves

   143                 OnHidEventDelegate d = new OnHidEventDelegate(HandleHidEventThreadSafe);

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

   145             }

   146             else

   147             {

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

   149                 {

   150                     //No usage, nothing to do then

   151                     return;

   152                 }

   154                 //We are in the proper thread

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

   156                 {

   157                     switch (aHidEvent.Usages[0])

   158                     {

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

   160                             HandleGreenStart();

   161                             break;

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

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

   164                             HandleEject();

   165                             break;

   166                     }

   167                 }

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

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

   171                 {

   172                     HandleEject();

   173                 }

   175             }

   176         }

   178         /// <summary>

   179         ///

   180         /// </summary>

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

   182         private void CheckLastError(string aPrefix)

   183         {

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

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

   186         }

   188         /// <summary>

   189         ///

   190         /// </summary>

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

   192         /// <returns></returns>

   193         private IntPtr MarshalToPointer(object data)

   194         {

   195             IntPtr buf = Marshal.AllocHGlobal(

   196                 Marshal.SizeOf(data));

   197             Marshal.StructureToPtr(data,

   198                 buf, false);

   199             return buf;

   200         }

   202         /// <summary>

   203         ///

   204         /// </summary>

   205         /// <returns></returns>

   206         private SafeFileHandle OpenVolume(string aDriveName)

   207         {

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

   209                                SharpLib.Win32.FileAccess.GENERIC_READ,

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

   211                                IntPtr.Zero,

   212                                CreationDisposition.OPEN_EXISTING,

   213                                0,

   214                                IntPtr.Zero);

   215         }

   217         /// <summary>

   218         ///

   219         /// </summary>

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

   221         /// <returns></returns>

   222         private bool LockVolume(SafeFileHandle aVolume)

   223         {

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

   225             IntPtr dwBytesReturned=new IntPtr();

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

   227             OVERLAPPED overlapped=new OVERLAPPED();

   229             int tries = 0;

   230             const int KMaxTries = 100;

   231             const int KSleepTime = 10;

   232             bool success = false;

   234             while (!success && tries < KMaxTries)

   235             {

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

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

   238                 tries++;

   239             }

   241             CheckLastError("Lock volume: ");

   243             return success;

   244         }

   246         /// <summary>

   247         ///

   248         /// </summary>

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

   250         /// <returns></returns>

   251         private bool DismountVolume(SafeFileHandle aVolume)

   252         {

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

   254             IntPtr dwBytesReturned = new IntPtr();

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

   256             OVERLAPPED overlapped=new OVERLAPPED();

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

   259             CheckLastError("Dismount volume: ");

   260             return res;

   261         }

   265         /// <summary>

   266         ///

   267         /// </summary>

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

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

   270         /// <returns></returns>

   271         private bool PreventRemovalOfVolume(SafeFileHandle aVolume, bool aPreventRemoval)

   272         {

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

   274             IntPtr dwBytesReturned = new IntPtr();

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

   276             OVERLAPPED overlapped = new OVERLAPPED();

   277             //

   278             PREVENT_MEDIA_REMOVAL preventMediaRemoval = new PREVENT_MEDIA_REMOVAL();

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

   280             IntPtr preventMediaRemovalParam = MarshalToPointer(preventMediaRemoval);

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

   283             CheckLastError("Media removal: ");

   284             Marshal.FreeHGlobal(preventMediaRemovalParam);

   286             return result;

   287         }

   289         /// <summary>

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

   291         /// </summary>

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

   293         /// <returns></returns>

   294         private bool MediaEject(SafeFileHandle aVolume)

   295         {

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

   297             IntPtr dwBytesReturned = new IntPtr();

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

   299             OVERLAPPED overlapped=new OVERLAPPED();

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

   302             CheckLastError("Media eject: ");

   303             return res;

   304         }

   306         /// <summary>

   307         /// Close an optical drive tray.

   308         /// </summary>

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

   310         /// <returns></returns>

   311         private bool MediaLoad(SafeFileHandle aVolume)

   312         {

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

   314             IntPtr dwBytesReturned = new IntPtr();

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

   316             OVERLAPPED overlapped=new OVERLAPPED();

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

   319             CheckLastError("Media load: ");

   320             return res;

   321         }

   323         /// <summary>

   324         ///

   325         /// </summary>

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

   327         /// <returns></returns>

   328         private bool StorageCheckVerify(SafeFileHandle aVolume)

   329         {

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

   331             IntPtr dwBytesReturned = new IntPtr();

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

   333             OVERLAPPED overlapped = new OVERLAPPED();

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

   337             CheckLastError("Check verify: ");

   339             return res;

   340         }

   344         /// <summary>

   345         /// Perform media ejection.

   346         /// </summary>

   347         private void HandleEject()

   348         {

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

   350             if (drive.Length!=2)

   351             {

   352                 //Not a proper drive spec.

   353                 //Probably 'None' selected.

   354                 return;

   355             }

   357             SafeFileHandle handle = OpenVolume(drive);

   358             if (handle.IsInvalid)

   359             {

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

   361                 return;

   362             }

   364             if (LockVolume(handle) && DismountVolume(handle))

   365             {

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

   368                 if (PreventRemovalOfVolume(handle,false))

   369                 {

   370                     //StorageCheckVerify(handle);

   372                     DateTime before;

   373                     before = DateTime.Now;

   374                     bool ejectSuccess = MediaEject(handle);

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

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

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

   379                     if (ejectSuccess && ms > 100)

   380                     {

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

   382                     }

   383                     else if (MediaLoad(handle))

   384                     {

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

   386                     }

   387                 }

   388             }

   389             else

   390             {

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

   392             }

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

   395             handle.Dispose();

   396         }

   398         /// <summary>

   399         ///

   400         /// </summary>

   401         private void HandleGreenStart()

   402         {

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

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

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

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

   407             {

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

   409                 ProcessStartInfo start = new ProcessStartInfo();

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

   411                 //start.Arguments = arguments;

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

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

   414                 start.WindowStyle = ProcessWindowStyle.Normal;

   415                 start.CreateNoWindow = true;

   416                 start.UseShellExecute = true;

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

   418                 Process proc = Process.Start(start);

   420                 //SL: We could have used that too

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

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

   423             }

   424             else

   425             {

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

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

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

   429             }

   430         }

   431         /// <summary>

   432         /// We need to handle WM_INPUT.

   433         /// </summary>

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

   435         protected override void WndProc(ref Message message)

   436         {

   437             switch (message.Msg)

   438             {

   439                 case Const.WM_INPUT:

   440                     //Returning zero means we processed that message.

   441                     message.Result = new IntPtr(0);

   442                     iHidHandler.ProcessInput(ref message);

   443                     break;

   444             }

   446             //Hook in our power manager

   447             if (iPowerSettingNotifier!=null)

   448             {

   449                 iPowerSettingNotifier.WndProc(ref message);

   450             }

   452             //Is that needed? Check the docs.

   453             base.WndProc(ref message);

   454         }

   455     }

   456 }

author	StephaneLenclud
	Sat, 26 Sep 2015 11:56:49 +0200
changeset 166	22b327842add
parent 160	de942d321cfb
child 167	d2295c186ce1
permissions	-rw-r--r--