'\"
'\" Copyright (c) 1997 Maorong Zou
'\" 
.TH EZ_AddWidgetCallBack 3 "" EZWGL "EZWGL Functions"
.BS
.SH NAME
EZ_AddIdleCallBack,EZ_RemoveIdleCallBack,
EZ_RemoveAllIdleCallBacks  \- register/remove idle callbacks

.SH SYNOPSIS
.nf
.B #include <EZ.h>
.sp
.BI "void EZ_AddIdleCallBack( EZ_CallBack " callback ", void *" clientdata )
.BI "void EZ_RemoveIdleCallBack( EZ_CallBack " callback ", void *"clientdata )
.BI "void EZ_RemoveAllIdleCallBacks(" " ) 

.SH ARGUMENTS
\fIcallback\fR  Specifies a callback.
.sp
\fIclientdata\fR  Specifies an clientdata to be passed to the
callback.

.SH DESCRIPTION
.PP
An \fBcallback\fR is a procedure of the following prototype:
.sp
.nf
    void (* callback)(void *object, void *data)
.fi
.PP
\fBEZ_AddIdleCallBack\fR registers an idle callback. Idle callbacks
are executed when there are no user events to process.
.PP
\fBEZ_RemoveIdleCallBack\fR deletes an idle callback.
The specified callback will be deleted only if both the procedure and
the client data match.
.PP
\fBEZ_RemoveAllCallBacks\fR deletes all idle callbacks.

.SH "SEE ALSO"
EZ_ExecuteIdleCallBacks(3)
.br
EZ_AddWidgetCallBack(3)
.br
EZ_AddEventHandler(3)