blob: ff2547ea41cc4cb89ee12294a0dd6b5202e9da90 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
[comment {-*- tcl -*- doctools manpage}]
[manpage_begin tcl::transform::core n 1]
[keywords {reflected channel}]
[keywords {tip 219}]
[keywords {virtual channel}]
[copyright {2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>}]
[moddesc {Reflected/virtual channel support}]
[category Channels]
[titledesc {Basic reflected/virtual channel transform support}]
[require Tcl 8.5]
[require TclOO]
[require tcl::transform::core [opt 1]]
[description]
[para]
The [package tcl::transform::core] package provides a [package TclOO]
class implementing common behaviour needed by virtually every
reflected or virtual channel transformation (initialization, finalization).
[para] This class expects to be used as either superclass of a concrete
channel class, or to be mixed into such a class.
[section {Class API}]
[list_begin definitions]
[call [cmd ::tcl::transform::core] [arg objectName]]
This command creates a new transform core object with an associated
global Tcl command whose name is [emph objectName]. This command may
be used to invoke various operations on the object, as described in
the section for the [sectref {Instance API}].
[list_end]
[section {Instance API}]
The API of transform core instances provides only two methods, both
corresponding to transform handler commands (For reference see
[uri http:/tip.tcl.tk/230 {TIP 230}]). They expect to be called
from whichever object instance the transform core was made a part of.
[list_begin definitions]
[call [arg objectName] [method initialize] [arg thechannel] [arg mode]]
This method implements standard behaviour for the [method initialize]
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.
[para] It further remembers the channel handle in an instance variable
for access by sub-classes.
[call [arg objectName] [method finalize] [arg thechannel]]
This method implements standard behaviour for the [method finalize]
method of channel handlers. It simply destroys itself.
[call [arg objectName] [method destroy]]
Destroying the transform core instance closes the channel and transform
it was initialized for, see the method [method initialize]. When destroyed
from within a call of [method finalize] this does not happen, under
the assumption that the channel and transform are being destroyed by Tcl.
[list_end]
[vset CATEGORY virtchannel]
[include ../doctools2base/include/feedback.inc]
[manpage_end]
|
