Hi everyone,
I have some problems about the postscript method that I cannot figure out. Does anyone know about it and could help me fix it ?
Now, I have a canvas with a certain items on it and all I want to do is to use the postscript method to dump it out and send the ps file to the printer.
What I expect to have is a single or multiple pages printed out but What I get was a blank page. Here is the program : 
#!perl
use warnings;
use strict;
use Tk;

my $mw=MainWindow->new(-title=>"Print out the canvas");
my c=$mw->Scrolled("Canvas")->pack(-expand=>1,-fill=>'both');
my $canvas=$c->Subwidget("canvas");
$canvas->createLine(100,100,20,20,-arrow=>'both',-arrowshape=>[10,10,1
+0]);
$canvas->createOval(100,80,65,75,-fill=>"blue");
$canvas->createRectangle(30,50,60,80, -fill=>"red",-width=>5);
$canvas->createText(150,1100,-text=>"check postscript",-justify=>"left
+");
$canvas->createOval(150,1150,300,1300,-fill=>"blue");
$canvas->createRectangle(150,1300,400,1350, -fill=>"red",-width=>5);
$canvas->configure(-scrollregion=>[$canvas->bbox("all")]);
$canvas->update();

my $button=$canvas->Button(-text=>"Print",-command=>\&buttonDo)
                            ->pack(-side=>"bottom");
MainLoop;
sub buttonDo{
    $canvas->update;
    my @coord=$canvas->bbox('all');    
    my $maxwidth=$coord[2];    
    my $maxheight=$coord[3];
    $canvas->postscript(    '-x'=>'0','-y'=>'0',
                            -colormode=>'color',
                            -file=> "file.ps",
                               -rotate=>0,
                               -width=>$maxwidth,
                               -height=>$maxheight,
                               -pageheight=>'10.5 i',
                            -pagewidth=>'8 i');
    system("lpr -S serverN-P printerN file.ps") == 0 or die $!;
    }

[download]
I suppose to get all the items of my canvas and then dump them out with the postscript method because I already used $canvas->bbox().
I tried to use pageheight and pagewidth to scale all my items in one page 8x11 inches but it seems not to work somehow.
I also used width and height options to specify the canvas surface that I want to print but all I get is blank.
Did I do something wrong ?
or is it a problem of the resolution of my printer since it cut all the items out the standard frame before printing?
Thanks so much.

In reply to $canvas->postscript method - unexpected result by cta

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