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- Description
The GetDeviceData() method will retrieve buffered data that the device is holding.
The data format must be set with TDx_InputDevice::SetDataFormat(), the buffer size must be set with TDx_InputDevice::SetProperty() and the device acquired with TDx_InputDevice::Acquire() before device data can be obtained.
To flush the buffer, set the DOD parameter to NULL and the InOut parameter to INFINITE.
The number of items flushed will be returned in the InOut parameter.
Setting the Flags parameter to DIGDD_PEEK will return the number of items without flushing the buffer.
Error Values that can be generated are:
DIERR_INPUTLOST
DIERR_INVALIDPARAM
DIERR_NOTACQUIRED
DIERR_NOTBUFFERED
DIERR_NOTINITIALIZED
- Parameters
ObjectData
The ObjectData parameter defines the size, in bytes, of each of the TDIDeviceObjectData components referenced by the DOD parameter.
DeviceObjectData
The DeviceObjectData parameter references an array of TDIDeviceDeviceObjectData components for holding the data retrieved.
Setting this parameter to NULL will discard the buffered data while still allowing the other effects of the method call to occur.
InOut
The InOut parameter initially defines the number of elements in the DOD array and on return it holds the actual number of elements retrieved.
Flags
The Flags parameter defines a flag indicating whether to retain the data after if has been retrieved.
The described effect applies when the flag is set.
-
DIGDD_PEEK
Retrieved data will not be removed from the buffer and thus the next TDx_InputDevice::GetDeviceData() call will retrieve the same data.
Data is usually removed from the buffer after retrieval.
- See Also
- Top
TDx_Input_Library v2.00 Component Reference
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[ TDx_InputDevice::GetDeviceData() ] [ next: GetDeviceInfo() ] [ prev: GetCapabilities() ] public:
virtual bool __fastcall GetDeviceData( dword pObjectData, TDIDeviceObjectData* pDeviceObjectData, dword* pInOut, dword pFlags );
TDX_INPUTDEVICE::GETDEVICEDATA()
[ component method ]
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