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
|
#!/usr/local/bin/perl
use Tk;
package Region;
sub new
{
my ($class,%info) = @_;
return bless \%info,$class;
}
sub children
{
}
package Hack;
use Tk::Xlib;
require Tk::Button;
use base qw(Tk::Button);
sub Inquire
{
my ($obj,$win) = @_;
return Region->new(Display => $obj->Display, XID => $win);
}
sub site
{
my ($w,$x,$y) = @_;
my $r = $w->{regions};
if (!defined $r)
{
my $dpy = $w->Display;
$w->Inquire($dpy->RootWindow($dpy->DefaultScreen));
$w->{regions} = $r;
}
}
sub probe
{
my ($w) = @_;
my $e = $w->XEvent;
my $x = $e->X;
my $y = $e->Y;
my $s = $w->site($x,$y);
print "At $x,$y\n";
}
package main;
$top = MainWindow->new;
my $w = Hack->new($top,-text => 'Drag this');
$w->bind('<Any-Motion>','probe');
$w->pack;
MainLoop;
|
