Friends,

I can't figure out how to set a callback for a mouse click on my canvas. I have this code ... 
#!/usr/bin/perl -w

use strict;

use Tk;
use Tk::Canvas;
use Getopt::Std;
my $width       = 250;
my $height      = 250;
my $units       = 10;
my $background  = 'blue';
my $fill        = 'yellow';
my %opts        = ();
getopts( 'W:H:b:f:u:h', \%opts );
if( $opts{W} ) { $width         = $opts{W} ; }
if( $opts{H} ) { $height        = $opts{H} ; }
if( $opts{b} ) { $background    = $opts{b} ; }
if( $opts{f} ) { $fill          = $opts{f} ; }
if( $opts{u} ) { $units         = $opts{u} ; }

my $dx = $width  / $units;
my $dy = $height / $units;


my $top = MainWindow->new();
my $can = $top->Canvas( -width => $width, -height=> $height )->pack();

drawGrid( $can );

my $root = "BLAHBLAHBLAH";

$can->bind( \$can, '<Button-1>', \&my_test( $root ) );

MainLoop;

sub drawGrid {
        my $can = shift;
        my $X=0;
        for ( my $x=0; $x < $units; $x++ ) {
                $can->create( 'line' , $X , 0 , $X , $can->reqheight()
+ ); $X += $dx;
        }
        my $Y=0;
        for ( my $y=0; $y < $units; $y++ ) {
                $can->create( 'line' , 0 , $Y , $can->reqwidth() , $Y)
+; $Y += $dy;
        }
}

sub my_test {
        my $msg = shift;
        print "$msg\n";
}

[download]
... and the problem with this code is that the sub my_test executes from the MainLoop starts and not when I click the mouse on the canvas. I want my_test to execute when I click the mouse on the canvas.

Thanks

Plankton: 1% Evil, 99% Hot Gas.

In reply to Tk bind mouse down question by Plankton

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