IManipulationProcessor::ProcessDownWithTime method (manipulations.h)

Article
02/22/2024

Feeds touch down data, including a timestamp, to the manipulation processor associated with a target.

Syntax

HRESULT ProcessDownWithTime(
  MANIPULATOR_ID manipulatorId,
  FLOAT          x,
  FLOAT          y,
  DWORD          timestamp
);

Parameters

manipulatorId

The identifier for the touch contact to be processed.

x

The horizontal coordinate data associated with the target.

y

The vertical coordinate data associated with the target.

timestamp

The time of the data event.

Return value

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code such as E_FAIL.

Remarks

It is possible to receive touch events out of the order they were produced. To fix this, you should extract the timestamp from the TOUCHINPUT structure when you process events.

Examples

static void ProcessDown(TOUCHINPUT* pTouchInput, IManipulationProcessor* pManipulationProcessor){
  pManipulationProcessor->ProcessDownWithTime(
    pTouchInput->dwID, 
    static_cast<float>(pTouchInput->x), 
    static_cast<float>(pTouchInput->y), 
    pTouchInput->dwTime
  );
}

Requirements

Requirement	Value
Minimum supported client	Windows 7 [desktop apps only]
Minimum supported server	Windows Server 2008 R2 [desktop apps only]
Target Platform	Windows
Header	manipulations.h (include Manipulations_i.c)

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