#!/usr/bin/perl --
use strict; use warnings;
use Tk;
use Tk::AbstractCanvas;
{
    my $mwin = my $mw = tkinit;
    my $acnv = $mwin->AbstractCanvas()->pack(-expand => 1, -fill => 'both');
    $acnv->controlNav(1); # advanced CtrlKey+MouseDrag Navigation
    $acnv->rectToPoly(1);
    $acnv->ovalToPoly(1);
    my $rect   = $acnv->createRectangle( 7,  8, 24, 23, -fill  =>   'red');
    my $oval   = $acnv->createOval(     23, 24, 32, 27, -fill  => 'green');
    my $line   = $acnv->createLine(      0,  1, 31, 32, -fill  =>  'blue',
                                                        -arrow =>  'last');
    my $labl   = $mwin->Label(-text => 'Hello AbstractCanvas! =)');
    my $wind   = $acnv->createWindow(15, 16, -window => $labl);
    $acnv->CanvasBind('<x>' => \&exit);
    $acnv->CanvasFocus();
    $acnv->viewAll();
    
    my $c2 = $mwin->Canvas(
        -background => 'black',
#~         -width  => 100,
#~         -height => 100,
#~         -width  => 20,
#~         -height => 20,
        -width  => 30,
        -height => 30,
    );
    $c2->createOval(0, 0, 5, 5, -fill => 'white',-tags => ['shabba'] );
    $mw->bind( $c2, '<ButtonPress-1>' => [ \&shabba , $acnv ]);
    $c2->place( qw/ -x 10 -y 10 / );
}

MainLoop;
sub shabba {
    my( $c2, $acnv ) = @_;
#~         my $c2 = $Tk::event->W; 
    my $x = $Tk::event->x;
    my $y = $Tk::event->y;
#~ use Data::Dump;
#~ dd [ $c2->configure ], [ $c2->itemconfigure( 'shabba' )] ;
    $c2->coords( 'shabba', $x, $y , $x+5, $y+5); # size is 5
    my $width  = $c2->cget('-width');
    my $height = $c2->cget('-height');
    my $xview  = $x / $width;
    my $yview  = $y / $height;
    $acnv->xviewMoveto( $xview );
    $acnv->yviewMoveto( $yview );
    
}