Casio DT-X8 Series Manual do Utilizador descarregar pdf (Página 168)

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pwParam

Specify address of WPARAM variable which is related with OS issued message.

If touch panel driver recognized as multi touch gesture operation, retrieve the following

gesture ID.

And if touch panel driver recognized as single touch gesture operation, return specified

gesture ID as it is.

GID_ZOOM

: Pinch In/Pinch Out

GID_ROTATE

: Rotate

plParam

Specify address of LPARAM variable which is related with OS issued message.

pdwDistance

Specify address variable which is retrived distance (0 to 800) between fingers.

If gesture ID is GID_ZOOM only, retrived distance and other case set as 0 value.

pdwAngle

Specify address of variable which is retrived rotale angle (-180 degree to 180 degree)

between fingers.

If gesture ID is GID_ROTATE only, retrived rotate angle and other case set as 0 value.

Rotate angle will be set as 0 degree at GID_BEGIN message is occurred, and retrieved

rotale angle as counterclockwise is plus degree and clockwise is minus degree.

Return Values

TRUE : Normal end

FALSE : Internal error

FUNCTION_UNSUPPORT : Unsupported error

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Casio DT-X8 Series Manual do Utilizador Página 168