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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
package Tk::Event::IO;
use strict;
use Carp;
use vars qw($VERSION @EXPORT_OK);
$VERSION = sprintf '4.%03d', q$Revision: #8 $ =~ /\D(\d+)\s*$/;
use base qw(Exporter);
use Symbol ();
@EXPORT_OK = qw(READABLE WRITABLE);
sub PrintArgs
{
my $func = (caller(1))[3];
print "$func(",join(',',@_),")\n";
}
sub PRINT
{
my $obj = shift;
$obj->wait(WRITABLE);
my $h = $obj->handle;
return print $h @_;
}
sub PRINTF
{
my $obj = shift;
$obj->wait(WRITABLE);
my $h = $obj->handle;
return printf $h @_;
}
sub WRITE
{
my $obj = $_[0];
$obj->wait(WRITABLE);
return syswrite($obj->handle,$_[1],$_[2]);
}
my $depth = 0;
sub READLINE
{
my $obj = shift;
$obj->wait(READABLE);
my $h = $obj->handle;
my $w = <$h>;
return $w;
}
sub READ
{
my $obj = $_[0];
$obj->wait(READABLE);
my $h = $obj->handle;
return sysread($h,$_[1],$_[2],defined $_[3] ? $_[3] : 0);
}
sub GETC
{
my $obj = $_[0];
$obj->wait(READABLE);
my $h = $obj->handle;
return getc($h);
}
sub CLOSE
{
my $obj = shift;
$obj->unwatch;
my $h = $obj->handle;
return close($h);
}
sub EOF
{
my $obj = shift;
my $h = $obj->handle;
return eof($h);
}
sub FILENO
{
my $obj = shift;
my $h = $obj->handle;
return fileno($h);
}
sub imode
{
my $mode = shift;
my $imode = ${{'readable' => READABLE(),
'writable' => WRITABLE()}}{$mode};
croak("Invalid handler type '$mode'") unless (defined $imode);
return $imode;
}
sub fileevent
{
my ($widget,$file,$mode,$cb) = @_;
my $imode = imode($mode);
unless (ref $file)
{
no strict 'refs';
$file = Symbol::qualify($file,(caller)[0]);
$file = \*{$file};
}
my $obj = tied(*$file);
unless ($obj && $obj->isa('Tk::Event::IO'))
{
$obj = tie *$file,'Tk::Event::IO', $file;
}
if (@_ == 3)
{
# query return the handler
return $obj->handler($imode);
}
else
{
# set the handler
my $h = $obj->handler($imode,$cb);
undef $obj; # Prevent warnings about untie with ref to object
unless ($h)
{
untie *$file;
}
}
}
1;
__END__
|
