You can look at the widget demo under "Canvas", and select "Simple 2D Plot", it has a button to print to printer. Copy the code. It goes something like this: 
sub area_save {

    my($w, $pinfo) = @_;

    my($x1, $x2, $y1, $y2, $a);

    if($pinfo->{'areaX2'} != -1) {
    ($x1, $x2, $y1, $y2) =
      @$pinfo{'areaX1', 'areaX2', 'areaY1', 'areaY2'}; # slice !
    ($x1, $x2) = @$pinfo{'areaX2', 'areaX1'} if $x2 <= $x1;
    ($y1, $y2) = @$pinfo{'areaY2', 'areaY1'} if $y2 <= $y1;
    $a = $w->postscript('-x' => $x1, '-y' => $y1,
                -width => $x2 - $x1, -height => $y2 - $y1);
    } else {
    $a = $w->postscript;
    }

    $SIG{'PIPE'} = sub {};
    open(LPR, "| $pinfo->{'prcmd'}");
    print LPR $a;
    close(LPR);

} # end area_save

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

In reply to Re: Printing a TK Canvas by zentara
in thread Printing a TK Canvas by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.