Gtk2::ImageView::Tool::Dragger is the default image tool for Gtk2::ImageView. Its only feature is that it can drag the image around.
To install Gtk2::ImageView, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Gtk2::ImageView
CPAN shell
perl -MCPAN -e shell install Gtk2::ImageView
For more information on module installation, please visit the detailed CPAN module installation guide.