use strict;
use warnings;
use diagnostics;
use Tk;

my $mw= MainWindow->new;

my $canvas= $mw->Canvas( -background => 'black',
             -width      => '100',
             -height     => '200',
                       )->pack;

# either will work, I like the last one
#$canvas->CanvasBind('<Motion>', [\&scrappy, Ev('X'), Ev('Y'), Ev('s')]);
#$mw->bind('all','<Motion>', [\&scrappy, Ev('X'), Ev('Y'), Ev('s')]);
$mw->bind('Tk::Canvas','<Motion>', [\&scrappy, Ev('X'), Ev('Y'), Ev('s')]);

&MainLoop();

sub scrappy {
    my ( $widget, $x, $y, $s ) = @_;
    printf qq[widget: %s  x: %04.4s, y: %04.4s  modifier: %s \n], @_; 
}

__END__

widget: Tk::Canvas=HASH(0x232b3d4)  x: 0348, y: 0319  modifier: Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0347, y: 0320  modifier: Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0346, y: 0320  modifier: Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0345, y: 0320  modifier: Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0343, y: 0320  modifier: Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0341, y: 0320  modifier: Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0339, y: 0320  modifier: Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0338, y: 0320  modifier: Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0337, y: 0320  modifier: Control-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0336, y: 0320  modifier: Control-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0334, y: 0320  modifier: Control-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0333, y: 0320  modifier: Control-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0333, y: 0321  modifier: Control-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0332, y: 0321  modifier: Control-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0330, y: 0321  modifier: Shift-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0329, y: 0321  modifier: Shift-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0328, y: 0321  modifier: Shift-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0327, y: 0322  modifier: Shift-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0326, y: 0322  modifier: Shift-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0325, y: 0322  modifier: Shift-Mod1- 
widget: Tk::Canvas=HASH(0x232b3d4)  x: 0324, y: 0322  modifier: Shift-Mod1-