/// <summary>
/// Processes WM_INPUT messages to retrieve information about any
/// touch events that occur.
/// </summary>
/// <param name="LParam">The WM_INPUT message to process.</param>
private void ProcessInputCommand(IntPtr LParam)
{
uint dwSize = 0;
// First call to GetRawInputData sets the value of dwSize
// dwSize can then be used to allocate the appropriate amount of memore,
// storing the pointer in "buffer".
NativeMethods.GetRawInputData(LParam, NativeMethods.RID_INPUT, IntPtr.Zero,
ref dwSize,
(uint)Marshal.SizeOf(typeof(NativeMethods.RAWINPUTHEADER)));
IntPtr buffer = Marshal.AllocHGlobal((int)dwSize);
IntPtr pPreparsedData = IntPtr.Zero;
try
{
// Check that buffer points to something, and if so,
// call GetRawInputData again to fill the allocated memory
// with information about the input
if (buffer != IntPtr.Zero &&
NativeMethods.GetRawInputData(LParam, NativeMethods.RID_INPUT,
buffer,
ref dwSize,
(uint)Marshal.SizeOf(typeof(NativeMethods.RAWINPUTHEADER))) == dwSize)
{
NativeMethods.RAWINPUT raw = (NativeMethods.RAWINPUT)Marshal.PtrToStructure(buffer, typeof(NativeMethods.RAWINPUT));
if (!_touchScreenPhysicalMax.ContainsKey(raw.header.hDevice)) return;
GetCurrentScreenOrientation();
uint pcbSize = 0;
NativeMethods.GetRawInputDeviceInfo(raw.header.hDevice, NativeMethods.RIDI_PREPARSEDDATA, IntPtr.Zero, ref pcbSize);
pPreparsedData = Marshal.AllocHGlobal((int)pcbSize);
NativeMethods.GetRawInputDeviceInfo(raw.header.hDevice, NativeMethods.RIDI_PREPARSEDDATA, pPreparsedData, ref pcbSize);
if (_touchScreenPhysicalMax[raw.header.hDevice].Equals(Point.Empty))
{
GetPhysicalMax(raw, pPreparsedData);
return;
}
int contactCount = 0;
IntPtr pRawData = new IntPtr(buffer.ToInt64() + (raw.header.dwSize - raw.hid.dwSizHid * raw.hid.dwCount));
HidNativeApi.HidP_GetUsageValue(HidReportType.Input, NativeMethods.TouchScreenUsagePage, 0, NativeMethods.ContactCountId,
ref contactCount, pPreparsedData, pRawData, raw.hid.dwSizHid);
int linkCount = 0;
HidNativeApi.HidP_GetLinkCollectionNodes(null, ref linkCount, pPreparsedData);
HidNativeApi.HIDP_LINK_COLLECTION_NODE[] lcn = new HidNativeApi.HIDP_LINK_COLLECTION_NODE[linkCount];
HidNativeApi.HidP_GetLinkCollectionNodes(lcn, ref linkCount, pPreparsedData);
if (contactCount != 0)
{
_requiringContactCount = contactCount;
_outputTouchs = new List<RawTouchData>(contactCount);
}
if (_requiringContactCount == 0) return;
int contactIdentifier = 0;
int physicalX = 0;
int physicalY = 0;
int screenWidth = Screen.PrimaryScreen.Bounds.Width;
int screenHeight = Screen.PrimaryScreen.Bounds.Height;
for (int dwIndex = 0; dwIndex < raw.hid.dwCount; dwIndex++)
{
for (short nodeIndex = 1; nodeIndex <= lcn[0].NumberOfChildren; nodeIndex++)
{
IntPtr pRawDataPacket = new IntPtr(pRawData.ToInt64() + dwIndex * raw.hid.dwSizHid);
HidNativeApi.HidP_GetUsageValue(HidReportType.Input, NativeMethods.TouchScreenUsagePage, nodeIndex, NativeMethods.ContactIdentifierId, ref contactIdentifier, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, nodeIndex, NativeMethods.XCoordinateId, ref physicalX, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, nodeIndex, NativeMethods.YCoordinateId, ref physicalY, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
int usageLength = 0;
HidNativeApi.HidP_GetUsages(HidReportType.Input, NativeMethods.TouchScreenUsagePage, nodeIndex, null, ref usageLength, pPreparsedData, pRawData, raw.hid.dwSizHid);
HidNativeApi.HIDP_DATA[] hd = new HidNativeApi.HIDP_DATA[usageLength];
HidNativeApi.HidP_GetUsages(HidReportType.Input, NativeMethods.TouchScreenUsagePage, nodeIndex, hd, ref usageLength, pPreparsedData, pRawData, raw.hid.dwSizHid);
int x, y;
if (_isAxisCorresponds)
{
x = physicalX * screenWidth / _touchScreenPhysicalMax[raw.header.hDevice].X;
y = physicalY * screenHeight / _touchScreenPhysicalMax[raw.header.hDevice].Y;
}
else
{
x = physicalY * screenWidth / _touchScreenPhysicalMax[raw.header.hDevice].Y;
y = physicalX * screenHeight / _touchScreenPhysicalMax[raw.header.hDevice].X;
}
x = _xAxisDirection ? x : screenWidth - x;
y = _yAxisDirection ? y : screenHeight - y;
bool tip = hd.Length != 0 && hd[0].DataIndex == NativeMethods.TipId;
_outputTouchs.Add(new RawTouchData(tip, contactIdentifier, new Point(x, y)));
if (--_requiringContactCount == 0) break;
}
if (_requiringContactCount == 0) break;
}
if (_requiringContactCount == 0 && PointsIntercepted != null)
{
PointsIntercepted(this, new RawPointsDataMessageEventArgs(_outputTouchs));
}
}
else throw new ApplicationException("GetRawInputData does not return correct size !\n.");
}
finally
{
Marshal.FreeHGlobal(pPreparsedData);
Marshal.FreeHGlobal(buffer);
}
}
/// <summary>
/// Processes WM_INPUT messages to retrieve information about any
/// touch events that occur.
/// </summary>
/// <param name="LParam">The WM_INPUT message to process.</param>
private void ProcessInputCommand(IntPtr LParam)
{
uint dwSize = 0;
// First call to GetRawInputData sets the value of dwSize
// dwSize can then be used to allocate the appropriate amount of memore,
// storing the pointer in "buffer".
NativeMethods.GetRawInputData(LParam, NativeMethods.RID_INPUT, IntPtr.Zero,
ref dwSize,
(uint)Marshal.SizeOf(typeof(NativeMethods.RAWINPUTHEADER)));
IntPtr buffer = Marshal.AllocHGlobal((int)dwSize);
IntPtr pPreparsedData = IntPtr.Zero;
try
{
// Check that buffer points to something, and if so,
// call GetRawInputData again to fill the allocated memory
// with information about the input
if (buffer != IntPtr.Zero &&
NativeMethods.GetRawInputData(LParam, NativeMethods.RID_INPUT,
buffer,
ref dwSize,
(uint)Marshal.SizeOf(typeof(NativeMethods.RAWINPUTHEADER))) == dwSize)
{
NativeMethods.RAWINPUT raw = (NativeMethods.RAWINPUT)Marshal.PtrToStructure(buffer, typeof(NativeMethods.RAWINPUT));
if (!_touchScreenPhysicalMax.ContainsKey(raw.header.hDevice))
{
return;
}
GetCurrentScreenOrientation();
uint pcbSize = 0;
NativeMethods.GetRawInputDeviceInfo(raw.header.hDevice, NativeMethods.RIDI_PREPARSEDDATA, IntPtr.Zero, ref pcbSize);
pPreparsedData = Marshal.AllocHGlobal((int)pcbSize);
NativeMethods.GetRawInputDeviceInfo(raw.header.hDevice, NativeMethods.RIDI_PREPARSEDDATA, pPreparsedData, ref pcbSize);
if (_touchScreenPhysicalMax[raw.header.hDevice].Equals(Point.Empty))
{
GetPhysicalMax(raw, pPreparsedData);
return;
}
int contactCount = 0;
IntPtr pRawData = new IntPtr(buffer.ToInt64() + (raw.header.dwSize - raw.hid.dwSizHid * raw.hid.dwCount));
HidNativeApi.HidP_GetUsageValue(HidReportType.Input, NativeMethods.TouchScreenUsagePage, 0, NativeMethods.ContactCountId,
ref contactCount, pPreparsedData, pRawData, raw.hid.dwSizHid);
int linkCount = 0;
HidNativeApi.HidP_GetLinkCollectionNodes(null, ref linkCount, pPreparsedData);
HidNativeApi.HIDP_LINK_COLLECTION_NODE[] lcn = new HidNativeApi.HIDP_LINK_COLLECTION_NODE[linkCount];
HidNativeApi.HidP_GetLinkCollectionNodes(lcn, ref linkCount, pPreparsedData);
if (contactCount != 0)
{
_requiringContactCount = contactCount;
_outputTouchs = new List <RawTouchData>(contactCount);
}
if (_requiringContactCount == 0)
{
return;
}
int contactIdentifier = 0;
int physicalX = 0;
int physicalY = 0;
int screenWidth = Screen.PrimaryScreen.Bounds.Width;
int screenHeight = Screen.PrimaryScreen.Bounds.Height;
for (int dwIndex = 0; dwIndex < raw.hid.dwCount; dwIndex++)
{
for (short nodeIndex = 1; nodeIndex <= lcn[0].NumberOfChildren; nodeIndex++)
{
IntPtr pRawDataPacket = new IntPtr(pRawData.ToInt64() + dwIndex * raw.hid.dwSizHid);
HidNativeApi.HidP_GetUsageValue(HidReportType.Input, NativeMethods.TouchScreenUsagePage, nodeIndex, NativeMethods.ContactIdentifierId, ref contactIdentifier, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, nodeIndex, NativeMethods.XCoordinateId, ref physicalX, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, nodeIndex, NativeMethods.YCoordinateId, ref physicalY, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
int usageLength = 0;
HidNativeApi.HidP_GetUsages(HidReportType.Input, NativeMethods.TouchScreenUsagePage, nodeIndex, null, ref usageLength, pPreparsedData, pRawData, raw.hid.dwSizHid);
HidNativeApi.HIDP_DATA[] hd = new HidNativeApi.HIDP_DATA[usageLength];
HidNativeApi.HidP_GetUsages(HidReportType.Input, NativeMethods.TouchScreenUsagePage, nodeIndex, hd, ref usageLength, pPreparsedData, pRawData, raw.hid.dwSizHid);
int x, y;
if (_isAxisCorresponds)
{
x = physicalX * screenWidth / _touchScreenPhysicalMax[raw.header.hDevice].X;
y = physicalY * screenHeight / _touchScreenPhysicalMax[raw.header.hDevice].Y;
}
else
{
x = physicalY * screenWidth / _touchScreenPhysicalMax[raw.header.hDevice].Y;
y = physicalX * screenHeight / _touchScreenPhysicalMax[raw.header.hDevice].X;
}
x = _xAxisDirection ? x : screenWidth - x;
y = _yAxisDirection ? y : screenHeight - y;
bool tip = hd.Length != 0 && hd[0].DataIndex == NativeMethods.TipId;
_outputTouchs.Add(new RawTouchData(tip, contactIdentifier, new Point(x, y)));
if (--_requiringContactCount == 0)
{
break;
}
}
if (_requiringContactCount == 0)
{
break;
}
}
if (_requiringContactCount == 0 && PointsIntercepted != null)
{
PointsIntercepted(this, new RawPointsDataMessageEventArgs(_outputTouchs));
}
}
else
{
throw new ApplicationException("GetRawInputData does not return correct size !\n.");
}
}
finally
{
Marshal.FreeHGlobal(pPreparsedData);
Marshal.FreeHGlobal(buffer);
}
}
/// <summary>
/// Processes WM_INPUT messages to retrieve information about any
/// touch events that occur.
/// </summary>
/// <param name="LParam">The WM_INPUT message to process.</param>
private void ProcessInputCommand(IntPtr LParam)
{
uint dwSize = 0;
// First call to GetRawInputData sets the value of dwSize
// dwSize can then be used to allocate the appropriate amount of memore,
// storing the pointer in "buffer".
NativeMethods.GetRawInputData(LParam, NativeMethods.RID_INPUT, IntPtr.Zero,
ref dwSize,
(uint)Marshal.SizeOf(typeof(RAWINPUTHEADER)));
IntPtr buffer = 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 (buffer == IntPtr.Zero ||
NativeMethods.GetRawInputData(LParam, NativeMethods.RID_INPUT,
buffer,
ref dwSize,
(uint)Marshal.SizeOf(typeof(RAWINPUTHEADER))) != dwSize)
{
throw new ApplicationException("GetRawInputData does not return correct size !\n.");
}
RAWINPUT raw = (RAWINPUT)Marshal.PtrToStructure(buffer, typeof(RAWINPUT));
ushort usage;
if (!_validDevices.TryGetValue(raw.header.hDevice, out usage))
{
return;
}
if (usage == NativeMethods.TouchScreenUsage)
{
if (_sourceDevice == Devices.None)
{
_currentScr = Screen.FromPoint(Cursor.Position);
if (_currentScr == null)
{
return;
}
_sourceDevice = Devices.TouchScreen;
GetCurrentScreenOrientation();
}
else if (_sourceDevice != Devices.TouchScreen)
{
return;
}
uint pcbSize = 0;
NativeMethods.GetRawInputDeviceInfo(raw.header.hDevice, NativeMethods.RIDI_PREPARSEDDATA, IntPtr.Zero, ref pcbSize);
IntPtr pPreparsedData = Marshal.AllocHGlobal((int)pcbSize);
using (new SafeUnmanagedMemoryHandle(pPreparsedData))
{
NativeMethods.GetRawInputDeviceInfo(raw.header.hDevice, NativeMethods.RIDI_PREPARSEDDATA, pPreparsedData, ref pcbSize);
int contactCount = 0;
IntPtr pRawData = new IntPtr(buffer.ToInt64() + (raw.header.dwSize - raw.hid.dwSizHid * raw.hid.dwCount));
HidNativeApi.HidP_GetUsageValue(HidReportType.Input, NativeMethods.DigitizerUsagePage, 0, NativeMethods.ContactCountId,
ref contactCount, pPreparsedData, pRawData, raw.hid.dwSizHid);
int linkCount = 0;
HidNativeApi.HidP_GetLinkCollectionNodes(null, ref linkCount, pPreparsedData);
HidNativeApi.HIDP_LINK_COLLECTION_NODE[] lcn = new HidNativeApi.HIDP_LINK_COLLECTION_NODE[linkCount];
HidNativeApi.HidP_GetLinkCollectionNodes(lcn, ref linkCount, pPreparsedData);
if (_physicalMax.IsEmpty)
{
_physicalMax = GetPhysicalMax(linkCount, pPreparsedData);
}
if (contactCount != 0)
{
_requiringContactCount = contactCount;
_outputTouchs = new List <RawData>(contactCount);
}
if (_requiringContactCount == 0)
{
return;
}
int contactIdentifier = 0;
int physicalX = 0;
int physicalY = 0;
for (int dwIndex = 0; dwIndex < raw.hid.dwCount; dwIndex++)
{
for (short nodeIndex = 1; nodeIndex <= lcn[0].NumberOfChildren; nodeIndex++)
{
IntPtr pRawDataPacket = new IntPtr(pRawData.ToInt64() + dwIndex * raw.hid.dwSizHid);
HidNativeApi.HidP_GetUsageValue(HidReportType.Input, NativeMethods.DigitizerUsagePage, nodeIndex, NativeMethods.ContactIdentifierId, ref contactIdentifier, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, nodeIndex, NativeMethods.XCoordinateId, ref physicalX, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, nodeIndex, NativeMethods.YCoordinateId, ref physicalY, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
int usageLength = 0;
HidNativeApi.HidP_GetUsages(HidReportType.Input, NativeMethods.DigitizerUsagePage, nodeIndex, null, ref usageLength, pPreparsedData, pRawData, raw.hid.dwSizHid);
HidNativeApi.HIDP_DATA[] hd = new HidNativeApi.HIDP_DATA[usageLength];
HidNativeApi.HidP_GetUsages(HidReportType.Input, NativeMethods.DigitizerUsagePage, nodeIndex, hd, ref usageLength, pPreparsedData, pRawData, raw.hid.dwSizHid);
int x, y;
if (_isAxisCorresponds)
{
x = physicalX * _currentScr.Bounds.Width / _physicalMax.X;
y = physicalY * _currentScr.Bounds.Height / _physicalMax.Y;
}
else
{
x = physicalY * _currentScr.Bounds.Width / _physicalMax.Y;
y = physicalX * _currentScr.Bounds.Height / _physicalMax.X;
}
x = _xAxisDirection ? x : _currentScr.Bounds.Width - x;
y = _yAxisDirection ? y : _currentScr.Bounds.Height - y;
bool tip = hd.Length != 0 && hd[0].DataIndex == NativeMethods.TipId;
_outputTouchs.Add(new RawData(tip, contactIdentifier, new Point(x + _currentScr.Bounds.X, y + _currentScr.Bounds.Y)));
if (--_requiringContactCount == 0)
{
break;
}
}
if (_requiringContactCount == 0)
{
break;
}
}
}
}
else if (usage == NativeMethods.TouchPadUsage)
{
if (_sourceDevice == Devices.None)
{
_currentScr = Screen.FromPoint(Cursor.Position);
if (_currentScr == null)
{
return;
}
_sourceDevice = Devices.TouchPad;
}
else if (_sourceDevice != Devices.TouchPad)
{
return;
}
uint pcbSize = 0;
NativeMethods.GetRawInputDeviceInfo(raw.header.hDevice, NativeMethods.RIDI_PREPARSEDDATA, IntPtr.Zero, ref pcbSize);
IntPtr pPreparsedData = Marshal.AllocHGlobal((int)pcbSize);
using (new SafeUnmanagedMemoryHandle(pPreparsedData))
{
NativeMethods.GetRawInputDeviceInfo(raw.header.hDevice, NativeMethods.RIDI_PREPARSEDDATA, pPreparsedData, ref pcbSize);
int contactCount = 0;
IntPtr pRawData = new IntPtr(buffer.ToInt64() + (raw.header.dwSize - raw.hid.dwSizHid * raw.hid.dwCount));
HidNativeApi.HidP_GetUsageValue(HidReportType.Input, NativeMethods.DigitizerUsagePage, 0, NativeMethods.ContactCountId,
ref contactCount, pPreparsedData, pRawData, raw.hid.dwSizHid);
int linkCount = 0;
HidNativeApi.HidP_GetLinkCollectionNodes(null, ref linkCount, pPreparsedData);
HidNativeApi.HIDP_LINK_COLLECTION_NODE[] lcn = new HidNativeApi.HIDP_LINK_COLLECTION_NODE[linkCount];
HidNativeApi.HidP_GetLinkCollectionNodes(lcn, ref linkCount, pPreparsedData);
if (_physicalMax.IsEmpty)
{
_physicalMax = GetPhysicalMax(linkCount, pPreparsedData);
}
if (contactCount != 0)
{
_requiringContactCount = contactCount;
_outputTouchs = new List <RawData>(contactCount);
}
if (_requiringContactCount == 0)
{
return;
}
int contactIdentifier = 0;
int physicalX = 0;
int physicalY = 0;
for (int dwIndex = 0; dwIndex < raw.hid.dwCount; dwIndex++)
{
for (short nodeIndex = 1; nodeIndex <= lcn[0].NumberOfChildren; nodeIndex++)
{
IntPtr pRawDataPacket = new IntPtr(pRawData.ToInt64() + dwIndex * raw.hid.dwSizHid);
HidNativeApi.HidP_GetUsageValue(HidReportType.Input, NativeMethods.DigitizerUsagePage, nodeIndex, NativeMethods.ContactIdentifierId, ref contactIdentifier, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, nodeIndex, NativeMethods.XCoordinateId, ref physicalX, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
HidNativeApi.HidP_GetScaledUsageValue(HidReportType.Input, NativeMethods.GenericDesktopPage, nodeIndex, NativeMethods.YCoordinateId, ref physicalY, pPreparsedData, pRawDataPacket, raw.hid.dwSizHid);
int usageLength = 0;
HidNativeApi.HidP_GetUsages(HidReportType.Input, NativeMethods.DigitizerUsagePage, nodeIndex, null, ref usageLength, pPreparsedData, pRawData, raw.hid.dwSizHid);
HidNativeApi.HIDP_DATA[] hd = new HidNativeApi.HIDP_DATA[usageLength];
HidNativeApi.HidP_GetUsages(HidReportType.Input, NativeMethods.DigitizerUsagePage, nodeIndex, hd, ref usageLength, pPreparsedData, pRawData, raw.hid.dwSizHid);
int x, y;
x = physicalX * _currentScr.Bounds.Width / _physicalMax.X;
y = physicalY * _currentScr.Bounds.Height / _physicalMax.Y;
bool tip = hd.Length != 0 && hd[0].DataIndex == NativeMethods.TipId;
_outputTouchs.Add(new RawData(tip, contactIdentifier, new Point(x + _currentScr.Bounds.X, y + _currentScr.Bounds.Y)));
if (--_requiringContactCount == 0)
{
break;
}
}
if (_requiringContactCount == 0)
{
break;
}
}
}
}
if (_requiringContactCount == 0 && PointsIntercepted != null)
{
PointsIntercepted(this, new RawPointsDataMessageEventArgs(_outputTouchs, _sourceDevice));
if (_outputTouchs.TrueForAll(rd => !rd.Tip))
{
_sourceDevice = Devices.None;
_physicalMax = Point.Empty;
}
}
}
finally
{
Marshal.FreeHGlobal(buffer);
}
}