Hi again, tamaguchi,

As for mystery #1, you don't want to use pack, you want to use createWindow instead, which is the mechanism by which you can put widgets into a Canvas.

Try this: 

#!/usr/bin/perl -w
use Tk;
use strict;
use warnings;
                                                                      
+          
my $mw = MainWindow->new;                                            
my $c = $mw->Scrolled('Canvas',
    -width => 500,
    -height => 500,
    -background =>'blue',
    -scrollregion => [ 0, 0, 1000, 1000 ]
);
                                                                      
+          
$c->pack(-expand => 1, -fill => 'both');
$c->createRectangle(100, 100, 150, 150, -fill => 'yellow');
                                                                      
+          
my $plus = $c->Button(
    -text => '  +  ',
    -command => sub { $c->scale("all", 0, 0, 2, 2) }
);
my $id = $c->createWindow(28, 20, -window => $plus);

MainLoop;

[download]
s''(q.S:$/9=(T1';s;(..)(..);$..=substr+crypt($1,$2),2,3;eg;print$..$/

In reply to Re: Tk mysteries. by liverpole
in thread Tk mysteries. by tamaguchi

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.