Answering my own questions, indeed it took a few hours to figure out ;-) The dragging issue is solved by the zinc->transform() command, like magic! Here is some pseudocode in case someone else ponders this, I suppose it's obvious to the gurus.. :-\

# -- PSEUDOCODE, DOES NOT WORK --
my ($dx, $dy);
sub mobile_start {
  my $ev = $zinc->XEvent;
  ($dx, $dy) = $zinc->transform(1, $scaled_group, [$ev->x, $ev->y]);
}

sub mobile_move {
  my $ev = $zinc->XEvent;
  my ($tr_evx, $tr_evy) = $zinc->transform(1, $scaled_group, [$ev->x, 
+$ev->y]);
  $zinc->translate($some_group, $tr_evx-$dx, $tr_evy-$dy);
  ($dx, $dy) = ($tr_evx, $tr_evy);
}

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In reply to Re^2: Total Newbies TkZinc questions by rocklee
in thread Total Newbies TkZinc questions by rocklee

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