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
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>