Hi Monks,

currently i'm working on a pTk-application which i will use for sorting pictures by hand. Some experiments with hlist worked quite good with single-selections. But i want a really ergonomic behavior as f. i. in KDE's konqueror or in ms-explorer.

I would like to select one or more eventually disjointed items (=thumbnails) as i can do already in a Listbox with -selectmode => "extended". Then i want to grip this selection, drag it and drop it onto another entry in the same Listbox/HList-entry. The selection should then be moved before this destination entry.

My problem is that a new ButtonPress-1-event destroys the former selection. In the documentation i couldn't find anything which avoids this behavior.

example which illustrates the problem

        use strict;
        use Tk;
        my $main = MainWindow->new;
        my $box = $main->Listbox(-relief => 'sunken',
                                 -width => -1, # Shrink to fit 
                                 -selectmode     => "extended",
                                 -height => 5,
                                 -setgrid => 1);
        my @items = qw(One Two Three Four Five Six Seven
                       Eight Nine Ten Eleven Twelve);
        foreach (@items) {
           $box->insert('end', $_);
        }
        my $scroll = $main->Scrollbar(-command => ['yview', $box]);
        $box->configure(-yscrollcommand => ['set', $scroll]);
        $box->pack(-side => 'left', -fill => 'both', -expand => 1);
        $scroll->pack(-side => 'right', -fill => 'y');
        MainLoop;
[download]

Any hints or suggestions ?

(btw. PMs is really very cool)