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XtAppAddInput(3)                                XT FUNCTIONS                                XtAppAddInput(3)



NAME
       XtAppAddInput, XtRemoveInput - register and remove an input source

SYNTAX
       XtInputId XtAppAddInput(XtAppContext app_context, int source, XtPointer condition, XtInputCallback-Proc XtInputCallbackProc
              Proc proc, XtPointer client_data);

       void XtRemoveInput(XtInputId id);

ARGUMENTS
       app_context
                 Specifies the application context that identifies the application.

       client_data
                 Specifies the argument that is to be passed to the specified procedure when input is avail-able. available.
                 able.

       condition Specifies the mask that indicates a read, write, or exception condition or some operating
                 system dependent condition.

       id        Specifies the ID returned from the corresponding XtAppAddInput call.

       proc      Specifies the procedure that is to be called when input is available.

       source    Specifies the source file descriptor on a UNIX-based system or other operating system
                 dependent device specification.

DESCRIPTION
       The XtAppAddInput function registers with the Intrinsics read routine a new source of events, which
       is usually file input but can also be file output.  Note that file should be loosely interpreted to
       mean any sink or source of data.  XtAppAddInput also specifies the conditions under which the source
       can generate events.  When input is pending on this source, the callback procedure is called.

       The legal values for the condition argument are operating-system dependent.  On a UNIX-based system,
       the condition is some union of XtInputReadMask, XtInputWriteMask, and XtInputExceptMask.  The
       XtRemoveInput function causes the Intrinsics read routine to stop watching for input from the input
       source.

SEE ALSO
       XtAppAddTimeOut(3Xt),XtAppAddSignal(3Xt)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface


BUGS
       In ANSI C it is necessary to cast the condition to an XtPointer, e.g.:
           XtAppAddInput(app_context,
               source,
               (XtPointer) (XtInputReadMask | XtInputWriteMask),
               proc,
               client_data);



X Version 11                                     libXt 1.0.5                                XtAppAddInput(3)