Here is some sample code for DirTree. It prints the dirname with a right click, but you could easily modify it.

#!/usr/bin/perl
use strict;
use Tk;
require Tk::DirTree;

#### DEBUG #### 
$main::DEBUG = 1;

# The initial directory 
my $initial_dir = '/';

# The main window... 
my $main_window = new MainWindow( -title => 'one test' );

# A scrolled directory tree 
my $tree = $main_window->Scrolled(
    'DirTree',
    -width            => 35,
    -height           => 25,
    -scrollbars       => 'osoe',
    -background       => 'White',
    -selectmode       => 'single',
    -selectbackground => 'DarkBlue',
    -selectforeground => 'White',
    -showhidden       => 1,
    -directory        => $initial_dir
);
$tree->pack(
    -expand => 'yes',
    -fill   => 'both',
    -padx   => 2,
    -pady   => 2,
    -side   => 'left'
);

# create the menu to be used for poping up 
my $menu = $main_window->Menu(
    -tearoff   => 0,
    -menuitems => [
        [
            'Button' => 'What?',
            -command => sub {
                print STDERR "Item is '", ( $tree->selectionGet() )[0]
+, "'\n";
              }
        ]
    ]
);

# Create the binding for the right mouse button 
$tree->bind(
    '<Button-3>' => [
        sub {
            my $widget = shift;
            my $y      = shift;

            my $current_item  = $widget->nearest($y);
            my $previous_item = ( $widget->selectionGet() )[0];

            $main::DEBUG and print STDERR "old    :", $previous_item, 
+"\n";
            $main::DEBUG and print STDERR "current:", $current_item,  
+"\n";

            # Clear selection and then set it to the new item 
            $widget->selectionClear();
            $widget->selectionSet($current_item);

### $$$$ Doesn't work: &destructor never called 
            $menu->OnDestroy( [ \&destructor, $widget, $previous_item 
+] );

            # Displaying the menu... 
#            $menu->Popup( 
#                -popover   => 'cursor', 
#                -popanchor => 'nw' 
#            ); 

    $menu->post($widget->pointerxy);
    destructor($widget, $previous_item);



        },
        Ev('y')
    ]
);

sub destructor {
    my $widget = shift;
    my $item   = shift;
    $main::DEBUG and print STDERR "in destructor, item:", $item, "\n";

    # Set selection to a particular item... 
    $widget->selectionClear();
    $widget->selectionSet($item);
}

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
+- 
- - -

  $tree->waitVisibility();
$tree->selectionSet($initial_dir);

MainLoop();
#### program sends above ####################
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