Re: Creating GUI's that work across several versions of Tk

[strat]

I always try to keep the Tk code within one or two modules e.g. MyApp::Widgets which contains little wrapper subroutines for the widgets I use, e.g

package MyApp::Widgets;
...
sub Button {
  my ($parent, $text, $callback, %options) = @_;
  if (ref $text) { $options{-textvariable} = $text }
  else           { $options{-text}         = $text }
  if (ref($callback) ....) {
    $options{-command} = $callback;
  }
  else {
    $options{-background} = '#ff0000';
  } # else

  return $parent->Button(
    -font       => $StdButtonFont,
    -background => '#ffdd00',
    %options,
  );
} # Button

or the like (code not tested)

and perhaps MyApp::Callbacks) which contains the whole callbacks to Tk. It's not too beautiful to call such a sub (e.g. my $button = &MyApp::Widgets::Button($parent, 'bla', sub { print "Exit }, -font => $BoldFont);), but this way I can give every widget default properties very easily; in addition to that, the whole Tk-Code is bundled within one or two modules which can easily be exchanged based on the Tk version by an installer or the like)