NAME

       uevent::onidle - Request merging and deferal to idle time

SYNOPSIS

       package require Tcl  8.4

       package require uevent::onidle  ?0.1?

       package require logger

       ::uevent::onidle objectName commandprefix

       objectName request

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DESCRIPTION

       This package provides objects which can merge multiple requestes for an action and execute
       the action the moment the system (event loop) becomes  idle.  The  action  to  be  run  is
       configured during object construction.

API

       The package exports a class, uevent::onidle, as specified below.

       ::uevent::onidle objectName commandprefix
              The command creates a new onidle object with an associated global Tcl command whose
              name is objectName.  This command may be used to invoke various operations  on  the
              object.

              The commandprefix is the action to perform when the event loop is idle and the user
              asked for it using the method request (See below).

       The object commands created by the class commands above have the form:

       objectName request
              This method requests the execution of  the  command  prefix  specified  during  the
              construction  of objectName the next time the event loop is idle. Multiple requests
              are merged and cause only one execution of the command prefix.

EXAMPLES

       Examples of this type of deferal are buried in the (C-level) implementations  all  the  Tk
       widgets, defering geometry calculations and window redraw activity in this manner.

BUGS, IDEAS, FEEDBACK

       This  document,  and  the  package  it  describes, will undoubtedly contain bugs and other
       problems.   Please  report  such  in  the  category  uevent   of   the   Tcllib   Trackers
       [http://core.tcl.tk/tcllib/reportlist].  Please also report any ideas for enhancements you
       may have for either package and/or documentation.

KEYWORDS

       callback, deferal, event, idle, merge, on-idle

COPYRIGHT

       Copyright (c) 2008 Andreas Kupries <andreas_kupries@users.sourceforge.net>