debian man page for cdk_process

cdk_process(3)						     Library Functions Manual						    cdk_process(3)

NAME
       cdk_process - curses widget pre/post-processing

SYNOPSIS
       Perform pre- and post-processing of data which is injected into a widget.

DESCRIPTION
       Character input is handled by each widget by its injection function.  That is typically a large case-statement consisting of the actions to
       be taken for editing and scrolling keys.  The calling application can modify the behavior of the injection function by defining	either	or
       both preprocess and postprocess functions.

       Preprocessing  is  performed before doing anything with the injected keystroke.	If the preprocess function returns zero, no further action
       is taken in the injection function.  Note that the preprocess function may do more than filter out characters; it  can  fill  in  logic	to
       coordinate different widgets.

       Postprocessing is performed after all other actions have been done in the injection function.  Like the other actions, it is performed only
       if the preprocess function returns a nonzero value.  Unlike the preprocess function, its return value is ignored.

SEE ALSO
       cdk(3), cdk_binding(3).

																    cdk_process(3)