


uevent::onidle(n)          User events          uevent::onidle(n)


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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 con-
       struction.

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  speci-
              fied  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) implemen-
       tations 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                 SF                 Trackers



uev                            0.1                              1





uevent::onidle(n)          User events          uevent::onidle(n)


       [http://sourceforge.net/tracker/?group_id=12883].  Please  also  report
       any ideas for enhancements you may have for either package and/or docu-
       mentation.

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

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
















































uev                            0.1                              2


