I don't know the source of your error message, but in general on a Tk Canvas, images and text fonts won't scale automatically. For instance this script shows scale working error free with the "all" tag, but the image and text must be manually zoomed, which I did not do. So the real question for me is, how did your image actually zoom as you claim The image zooms, but the objects don't change at all.

Please show a simple working example otherwise. 

#!/usr/bin/perl
use warnings;
use strict;
use Tk;
use Tk::JPEG;


my $width  = 600;
my $height = 600;

my $mw = MainWindow->new( -background => 'lightgreen' );
$mw->geometry( $width . 'x' . $height . '+40+40' );


# first create a canvas widget
my $canvas = $mw->Scrolled('Canvas', width => $width/1.3, height => $h
+eight/1.3)->pack();

 
my $eightim = $mw->Photo(-data => get_img() );


my $one = $canvas->createOval(55, 20, 200, 190, 
                      -fill => 'blue',
              -outline=>'blue',
              -tags => ['blue'],
              -stipple => 'gray75',
              );

my $two = $canvas->createOval(105, 20, 250, 190, 
                      -fill => 'red',
              -outline=>'red',
              -tags => ['red'],
                      -stipple => 'gray12',
              );

my $eight = $canvas->createImage( ($width * .5), ($height * .5) - 20,
       -image     => $eightim,
       -anchor   => 'center',
       -tags     => ['8im'],
);


my  $testfont = $mw->Font(-family=> 'Arial', -size  => 24);

my $text    = 'This is some text';
$canvas->createText(50,50,
    -text   => $text,
    -anchor => 'nw',
    -font   => $testfont );
    
$canvas->createRectangle(47,47,290,87);

my $ebutton = $mw->Button(-text => 'Exit',
                  -command => 'Tk::exit')->pack();

my $sbutton = $mw->Button(-text => 'Scale',
                  -command => sub{
                  
                      $canvas->scale('all', 0, 0, 1.5, 1.5);
                  
                      $canvas->configure(-scrollregion=>[$canvas->bbox
+("all")]);
                  })->pack();


MainLoop();


###########################################
sub get_img{
my $ima8=
'/9j/4AAQSkZJRgABAQEASABIAAD/4QAWRXhpZgAATU0AKgAAAAgAAAAAAAD//gAXQ3JlY
+XRlZCB3
aXRoIFRoZSBHSU1Q/9sAQwAFAwQEBAMFBAQEBQUFBgcMCAcHBwcPCwsJDBEPEhIRDxEREx
+YcFxMU
GhURERghGBodHR8fHxMXIiQiHiQcHh8e/9sAQwEFBQUHBgcOCAgOHhQRFB4eHh4eHh4eHh
+4eHh4e
Hh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4eHh4e/8AAEQgARQAxAwEiAAIRAQ
+MRAf/E
ABwAAAICAwEBAAAAAAAAAAAAAAAHBggCAwUEAf/EADkQAAEDAwEFBgMECwEAAAAAAAECAw
+QABREG
BxIhMYEIE0FhcZFRofAiIzJiFBVCUlOCkqKxwcLx/8QAFAEBAAAAAAAAAAAAAAAAAAAAAP
+/EABQR
AQAAAAAAAAAAAAAAAAAAAAD/2gAMAwEAAhEDEQA/AMa3RY0iXITHix3X3lcm20FSj0HGs7
+XCkXG5
RoEVO8/IdS22PMnGas/onSdp0jaEtRm2u+CMyJSgApZ8Tk8kjwHh65JBEwNmOtZaAsWcsp
+IyO+eQ
g9Uk5HUVnL2W62joKxaUvAc+7kNk+2cnpTF1Ftms0GUuPare9c9xRSXS6Gm1Ec8cCT7CtF
+n22WyR
JS3dLO/CbJx3rbwdA8yCEkD0zQJW4wZttkmNPiPxXxzbdQUq9jXmq199s9j1jYEtyEtSo7
+6N5h9H
EpzyUk+H0KrHqmzSdP3+XaJR3nI690LxjfTgFKuoINBzKKKKCabE0NL2lWsOAHAdKc/ENL
+Oacu2m
S9F2cXNUclKndxpRH7qlgKHUZHWq66euj9lvkK6xgC5FeSsAnG8M8Un1GR1qzCX7Lr7Rzz
+Ud/vIs
xvu14/GyvmAR4KBAPt4UFWc545zw5/XpXzOOOcY86l+otnOrLRKW2LVInsg/YeiNl0KHoO
+I6ivPZ
9A6vuchLLVjlR883JTZaQnzO9j5ZoG32eJMh7RDzDpKkRpi22vygpSopHlkk9ag3aJQ0nX
+cctgby
re2V4+O+4M+wFNvTlutWgdFhiTLQhiOlTsh9fDfWeZ8/AD0FV413f16m1RLuxSUNuKCWUH
+9lCRhP
U4yfM0HCooooM20LccDTaCtajupSBkqJ4AY8c/Cnnsx2Zy7Spu6XS6zIkpaQTGiulGE88O
+KH4ufI
YA8/CG7AbQ1cNaKlPpC0QI5eQCM/eEhKT0BJ9QKZG3S/SbLpBLMNwtyJ73cFY4FKACVY+Q
+6mg6F+
2j6RsslcR+5d++g7q246C4U+RVyz5ZzWm0bUNHXB9LH6xXEWrl+kNFCffiB1IqtIGBgE4H
+Lj9cfP
jR68c8+FBYXaTs7XqhJnQbzJVIA3248hzfjq8k8PsE/HjSBnxJUGa9DmsrZksq3HELHFJH
+11507u
zxfpc61zLJKeLgg7q2Co5IQrI3fQEf3egri9o+0tMXS23htCUrlIW07jxKMbpPxOFY/lFA
+pKKKKB
o9nGY21qmdEWQlT8TeRnxKVA49iT0qYdoW2PzdJR5sdtSzCkguADOEKGCffd96R2nLvKsN
+7jXaGr
D0Ze+ATgLGMFJ8iOHWrN6U1NZNW2kqiuNLUpG7IiO43kZGCFJPNPyNBVTIxzHvR4cOfhT/
+v2xuwT
ZKn7dNk2zfOS2kBbY9ASCB1rTaditljvpduN0lzkpIPdpQGkn15n5ig8HZutbzbNzvDiFJ
+ZeKGGC
R+LGSr/n51h2lZbfd2WCD95l15Q+A+yB/umTdLnYNH2NK5TkeBEYQUsspwCfyoT4n/01Wz
+XOo5Oq
NRP3WQC2lQDbLROe7bGcD5k+pNBwqKKKA5ZPlW6JIkRXUvxH3Y7qRlK2llJHoQRiiigk8H
+aTrWI2
ENX15aR/GbQ6f6lJJ+dZydpmt5SVNqvi0Jxx7thtJ9wkEUUUEXnzptxfMmdLkSXVcCt5wr
+V7k15/
8UUUBRRRQf/Z';
return $ima8;
}
#######################################
__END__

[download]
I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku ................... flash japh

In reply to Re: Tk: Scaling canvas objects by zentara
in thread Tk: Scaling canvas objects by perldough

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