/// <summary>
/// Processes WM_INPUT messages to retrieve information about any
/// keyboard events that occur.
/// </summary>
/// <param name="message">The WM_INPUT message to process.</param>
public void ProcessInputCommand(Message message)
{
uint dwSize = 0;
// First call to GetRawInputData sets the value of dwSize
// dwSize can then be used to allocate the appropriate amount of memory,
// storing the pointer in "buffer".
GetRawInputData(message.LParam,
RID_HEADER, IntPtr.Zero,
ref dwSize,
(uint)Marshal.SizeOf(typeof(RAWINPUTHEADER)));
var headerBuffer = Marshal.AllocHGlobal((int)dwSize);
try
{
// Check that buffer points to something, and if so,
// call GetRawInputData again to fill the allocated memory
// with information about the input
if (headerBuffer != IntPtr.Zero &&
GetRawInputData(message.LParam,
RID_HEADER,
headerBuffer,
ref dwSize,
(uint)Marshal.SizeOf(typeof(RAWINPUTHEADER))) == dwSize)
{
var header = (RAWINPUTHEADER)Marshal.PtrToStructure(headerBuffer, typeof(RAWINPUTHEADER));
if (header.dwType == RIM_TYPEHID)
{
DeviceInfo dInfo = null;
if (deviceList.Contains(header.hDevice))
{
dInfo = (DeviceInfo)deviceList[header.hDevice];
}
else
{
// Device not in list. Reenumerate all of them again. Could warn the code with some sort of Connect/Disconnect event.
EnumerateDevices();
dInfo = (DeviceInfo)deviceList[header.hDevice];
}
// The header tells us the size of the actual event
var eventBuffer = Marshal.AllocHGlobal(header.dwSize);
var eventSize = (uint)header.dwSize;
if (eventBuffer != IntPtr.Zero &&
GetRawInputData(message.LParam,
RID_INPUT,
eventBuffer,
ref eventSize,
(uint)Marshal.SizeOf(typeof(RAWINPUTHEADER))) == header.dwSize)
{
var eventType = (RAW3DMOUSE_EVENTTYPE)Marshal.PtrToStructure(new IntPtr(eventBuffer.ToInt32() + Marshal.SizeOf(typeof(RAWINPUTHEADER))), typeof(RAW3DMOUSE_EVENTTYPE));
switch (eventType.eventType)
{
case (byte)RAW3DxMouseEventType.TranslationVector:
if (header.dwSize == Marshal.SizeOf(typeof(RAWINPUTHEADER)) + SIZEOF_STANDARD_REPORT) // standard length T report
{
var t = (RAW3DMOUSEMOTION_T)Marshal.PtrToStructure(new IntPtr(eventBuffer.ToInt32() + Marshal.SizeOf(typeof(RAWINPUTHEADER))), typeof(RAW3DMOUSEMOTION_T));
var tv = new TranslationVector(t.X_lb, t.X_hb, t.Y_lb, t.Y_hb, t.Z_lb, t.Z_hb);
// Console.Write("Motion Event = {0} {1} {2}", tv.X, tv.Y, tv.Z);
MotionEvent(this, new MotionEventArgs(dInfo, tv));
}
else // "High Speed" firmware version includes both T and R vector in the same report
{
var tr = (RAW3DMOUSEMOTION_TR_COMBINED)Marshal.PtrToStructure(new IntPtr(eventBuffer.ToInt32() + Marshal.SizeOf(typeof(RAWINPUTHEADER))), typeof(RAW3DMOUSEMOTION_TR_COMBINED));
var tv = new TranslationVector(tr.X_lb, tr.X_hb, tr.Y_lb, tr.Y_hb, tr.Z_lb, tr.Z_hb);
var rv = new RotationVector(tr.RX_lb, tr.RX_hb, tr.RY_lb, tr.RY_hb, tr.RZ_lb, tr.RZ_hb);
// Console.WriteLine("6DOF Motion Event = {0} {1} {2} {3} {4} {5}", tv.X, tv.Y, tv.Z, rv.X, rv.Y, rv.Z);
MotionEvent(this, new MotionEventArgs(dInfo, tv, rv));
}
break;
case (byte)RAW3DxMouseEventType.RotationVector:
{
var r = (RAW3DMOUSEMOTION_R)Marshal.PtrToStructure(new IntPtr(eventBuffer.ToInt32() + Marshal.SizeOf(typeof(RAWINPUTHEADER))), typeof(RAW3DMOUSEMOTION_R));
var rv = new RotationVector(r.X_lb, r.X_hb, r.Y_lb, r.Y_hb, r.Z_lb, r.Z_hb);
// Console.WriteLine(" {0} {1} {2}", rv.X, rv.Y, rv.Z);
MotionEvent(this, new MotionEventArgs(dInfo, rv));
}
break;
case (byte)RAW3DxMouseEventType.ButtonReport:
var b = (RAW3DMOUSEBUTTONS)Marshal.PtrToStructure(new IntPtr(eventBuffer.ToInt32() + Marshal.SizeOf(typeof(RAWINPUTHEADER))), typeof(RAW3DMOUSEBUTTONS));
var bm = new ButtonMask(b.b1, b.b2, b.b3, b.b4);
Console.WriteLine("raw.buttons = {0:X}", bm.Pressed);
ButtonEvent(this, new ButtonEventArgs(dInfo, bm));
break;
}
}
}
}
}
finally
{
Marshal.FreeHGlobal(headerBuffer);
}
}
public MotionEventArgs(DeviceInfo dInfo, TranslationVector translationVector)
{
m_deviceInfo = dInfo;
m_translationVector = translationVector;
}
public MotionEventArgs(DeviceInfo dInfo, TranslationVector translationVector)
{
m_deviceInfo = dInfo;
m_translationVector = translationVector;
}