CAP_FEEDERALIGNMENT

Description

Helps the Application determine any special actions it may need to take when negotiating frames with the Source.

TWFA_NONE: The alignment is free-floating. Applications should assume that the origin for frames is on the left.

TWFA_LEFT: The alignment is to the left.

TWFA_CENTER: The alignment is centered. This means that the paper will be fed in the middle of the ICAP_PHYSICALWIDTH of the device. If this is set, then the Application should calculate any frames with a left offset.

TWFA_RIGHT: The alignment is to the right. If this is set, then the Application should calculate any frames with a left offset.

Application

The Application can use this to determine if it must center the framing information sent to the Source. With some Sources it might be possible for the Application to select whether the paper is center fed or not.

Source Values

Use this capability to report the state of the feeder. Type: TW_UINT

Value after MSG_OPENDS: (may be remembered from a previous session)

After MSG_RESET/MSG_RESETALL: (selected by the data source writer)

Allowed Values: TWFA_NONE TWFA_LEFT TWFA_CENTER TWFA_RIGHT

Containers

MSG_GET TW_ONEVALUE TW_ENUMERATION // 2.3 and higher

MSG_GETCURRENT TW_ONEVALUE

MSG_GETDEFAULT TW_ONEVALUE

MSG_SET TW_ONEVALUE if supported MSG_SETCONSTRAINT TW_ONEVALUE if supported MSG_RESET TW_ONEVALUE if supported MSG_QUERYSUPPORT TW_ONEVALUE

Required By

None

TWAIN Version Introduced

Version 1.8

Related