'\"
'\" Generated from file 'transformcore\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) 2009 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>
'\"
.TH "tcl::transform::core" n 1\&.1 tcllib "Reflected/virtual channel support"
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.SH NAME
tcl::transform::core \- Basic reflected/virtual channel transform support
.SH SYNOPSIS
package require \fBTcl 8\&.5 9\fR
.sp
package require \fBTclOO\fR
.sp
package require \fBtcl::transform::core ?1\&.1?\fR
.sp
\fB::tcl::transform::core\fR \fIobjectName\fR
.sp
\fIobjectName\fR \fBinitialize\fR \fIthechannel\fR \fImode\fR
.sp
\fIobjectName\fR \fBfinalize\fR \fIthechannel\fR
.sp
\fIobjectName\fR \fBdestroy\fR
.sp
.BE
.SH DESCRIPTION
.PP
The \fBtcl::transform::core\fR package provides a \fBTclOO\fR
class implementing common behaviour needed by virtually every
reflected or virtual channel transformation (initialization, finalization)\&.
.PP
This class expects to be used as either superclass of a concrete
channel class, or to be mixed into such a class\&.
.SH "CLASS API"
.TP
\fB::tcl::transform::core\fR \fIobjectName\fR
This command creates a new transform core object with an associated
global Tcl command whose name is \fIobjectName\fR\&. This command may
be used to invoke various operations on the object, as described in
the section for the \fBInstance API\fR\&.
.PP
.SH "INSTANCE API"
The API of transform core instances provides only two methods, both
corresponding to transform handler commands (For reference see
\fITIP 230\fR [http:/tip\&.tcl\&.tk/230])\&. They expect to be called
from whichever object instance the transform core was made a part of\&.
.TP
\fIobjectName\fR \fBinitialize\fR \fIthechannel\fR \fImode\fR
This method implements standard behaviour for the \fBinitialize\fR
method of transform handlers\&. Using introspection it finds the handler
methods supported by the instance and returns a list containing their
names, as expected by the support for reflected transformation in the
Tcl core\&.
.sp
It further remembers the channel handle in an instance variable
for access by sub-classes\&.
.TP
\fIobjectName\fR \fBfinalize\fR \fIthechannel\fR
This method implements standard behaviour for the \fBfinalize\fR
method of channel handlers\&. It simply destroys itself\&.
.TP
\fIobjectName\fR \fBdestroy\fR
Destroying the transform core instance closes the channel and transform
it was initialized for, see the method \fBinitialize\fR\&. When destroyed
from within a call of \fBfinalize\fR this does not happen, under
the assumption that the channel and transform are being destroyed by Tcl\&.
.PP
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fIvirtchannel\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.PP
When proposing code changes, please provide \fIunified diffs\fR,
i\&.e the output of \fBdiff -u\fR\&.
.PP
Note further that \fIattachments\fR are strongly preferred over
inlined patches\&. Attachments can be made by going to the \fBEdit\fR
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar\&.
.SH KEYWORDS
reflected channel, tip 219, virtual channel
.SH CATEGORY
Channels
.SH COPYRIGHT
.nf
Copyright (c) 2009 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>

.fi
