public RawInputEventArg(KeyPressEvent arg)
{
KeyPressEvent = arg;
}
public void EnumerateDevices()
{
lock (_padLock)
{
_deviceList.Clear();
var keyboardNumber = 0;
var globalDevice = new KeyPressEvent
{
DeviceName = "Global Keyboard",
DeviceHandle = IntPtr.Zero,
DeviceType = Win32.GetDeviceType(DeviceType.RimTypekeyboard),
Name =
"Fake Keyboard. Some keys (ZOOM, MUTE, VOLUMEUP, VOLUMEDOWN) are sent to rawinput with a handle of zero.",
Source = keyboardNumber++.ToString(CultureInfo.InvariantCulture)
};
_deviceList.Add(globalDevice.DeviceHandle, globalDevice);
var numberOfDevices = 0;
uint deviceCount = 0;
var dwSize = Marshal.SizeOf(typeof(Rawinputdevicelist));
if (Win32.GetRawInputDeviceList(IntPtr.Zero, ref deviceCount, (uint)dwSize) == 0)
{
var pRawInputDeviceList = Marshal.AllocHGlobal((int)(dwSize * deviceCount));
Win32.GetRawInputDeviceList(pRawInputDeviceList, ref deviceCount, (uint)dwSize);
for (var i = 0; i < deviceCount; i++)
{
uint pcbSize = 0;
// On Window 8 64bit when compiling against .Net > 3.5 using .ToInt32 you will generate an arithmetic overflow. Leave as it is for 32bit/64bit applications
var rid = (Rawinputdevicelist)Marshal.PtrToStructure(
new IntPtr(pRawInputDeviceList.ToInt64() + dwSize * i), typeof(Rawinputdevicelist));
Win32.GetRawInputDeviceInfo(rid.hDevice, RawInputDeviceInfo.RIDI_DEVICENAME, IntPtr.Zero,
ref pcbSize);
if (pcbSize <= 0)
{
continue;
}
var pData = Marshal.AllocHGlobal((int)pcbSize);
Win32.GetRawInputDeviceInfo(rid.hDevice, RawInputDeviceInfo.RIDI_DEVICENAME, pData,
ref pcbSize);
var deviceName = Marshal.PtrToStringAnsi(pData);
if (rid.dwType == DeviceType.RimTypekeyboard || rid.dwType == DeviceType.RimTypeHid)
{
var deviceDesc = Win32.GetDeviceDescription(deviceName);
var dInfo = new KeyPressEvent
{
DeviceName = Marshal.PtrToStringAnsi(pData),
DeviceHandle = rid.hDevice,
DeviceType = Win32.GetDeviceType(rid.dwType),
Name = deviceDesc,
Source = keyboardNumber++.ToString(CultureInfo.InvariantCulture)
};
if (!_deviceList.ContainsKey(rid.hDevice))
{
numberOfDevices++;
_deviceList.Add(rid.hDevice, dInfo);
}
}
Marshal.FreeHGlobal(pData);
}
Marshal.FreeHGlobal(pRawInputDeviceList);
NumberOfKeyboards = numberOfDevices;
Debug.WriteLine("EnumerateDevices() found {0} Keyboard(s)", NumberOfKeyboards);
return;
}
}
throw new Win32Exception(Marshal.GetLastWin32Error());
}
