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
|
# Copyright (c) 1990 The Regents of the University of California.
# Copyright (c) 1994-1996 Sun Microsystems, Inc.
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
#
=head1 NAME
Tk_SetClass, Tk_Class - set or retrieve a window's class
=for category C Programming
=head1 SYNOPSIS
B<#include E<lt>tk.hE<gt>>
B<Tk_SetClass>(I<tkwin, class>)
Tk_Uid
B<Tk_Class>(I<tkwin>)
=head1 ARGUMENTS
=over 4
=item Tk_Window tkwin (in)
Token for window.
=item char *class (in)
New class name for window.
=back
=head1 DESCRIPTION
B<Tk_SetClass> is called to associate a class with a particular
window. The I<class> string identifies the type of the
window; all windows with the same general class of behavior
(button, menu, etc.) should have the same class. By
convention all class names start with a capital letter, and
there exists a Tcl command with the same name as
each class (except all in lower-case) which can be used to
create and manipulate windows of that class.
A window's class string is initialized to NULL
when the window is created.
For main windows, Tk automatically propagates the name and class
to the WM_CLASS property used by window managers. This happens
either when a main window is actually created (e.g. in
B<Tk_MakeWindowExist>), or when B<Tk_SetClass>
is called, whichever occurs later. If a main window has not been
assigned a class then Tk will not set the WM_CLASS property for
the window.
B<Tk_Class> is a macro that returns the
current value of I<tkwin>'s class. The value is returned
as a Tk_Uid, which may be used just like a string pointer but also has
the properties of a unique identifier (see the the documentation for
B<Tk_GetUid> for details).
If I<tkwin> has not yet been given a class, then
B<Tk_Class> will return NULL.
=head1 KEYWORDS
class, unique identifier, window, window manager
|
