Hello Perlmonks

I'm in the process of converting a Perl/Tk app to a Tkx version.
This turns out to be a bit harder than I hoped.
Some of you monks already solved a few problems,
but I ran into new ones.

The code had a tree, but I was noticed that tree has a bug. Turned to listbox instead.
The code attached shows a frame with a button and a listbox. However:
1- removed, tree bug
2- I want to see the list-item (the text-part) when I click on it, not the index
3- And I want to set the background color of the button and the frame (independently)
Can anyone help me? Thank you!

#!/usr/bin/perl --

use strict;
use warnings;

use Tkx;
$Tkx::TRACE = 64;
Tkx::package_require('tile');

use Tkx;
my $mw = Tkx::widget->new(".");

my $f_report_period = $mw->new_ttk__labelframe(
    -text        => "report period",
    -labelanchor => 'nw',
    -relief      => 'groove',
    -borderwidth => '5'
);

my $listview = $f_report_period->new_tk__listbox( -height => 5, );

$listview->insert( "end", 
    "T $_ and a very long text to come after that" ) for 1 .. 20;

my $tree_sbv = $f_report_period->new_ttk__scrollbar(
    -command => [ $listview, "yview" ],
    -orient  => "vertical"
);
my $tree_sbh = $f_report_period->new_ttk__scrollbar(
    -command => [ $listview, "xview" ],
    -orient  => "horizontal"
);
$listview->configure( -yscrollcommand => [ $tree_sbv, "set" ] );
$listview->configure( -xscrollcommand => [ $tree_sbh, "set" ] );

$listview->g_bind("<1>" , sub{&showline});

sub showline {
    my @item = $listview->curselection;
    if ($#item==0) {
        print "$item[0] \n";
    }
}

$f_report_period->g_grid(
    -row     => 1,
    -column  => 0,
    -rowspan => 2,
    -sticky  => 'nsew'
);

$b_change_year->g_grid(
    -row        => 0,
    -column     => 0,
    -columnspan => 2,
    -sticky     => 'nsew',
);

$listview->g_grid(
    -row     => 1,
    -column  => 0,
    -rowspan => 1,
    -sticky  => 'nsew'
);

$tree_sbv->g_grid(
    -row    => 1,
    -column => 1,
    -sticky => 'ns'
);

$tree_sbh->g_grid(
    -row    => 2,
    -column => 0,
    -sticky => 'we'
);

Tkx::MainLoop();
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