When I install Mercurial on my Linux box (which might be Debian, or Fedora) I get a tool called
hgk, which is invoked when running
hg view, and displays the revision tree for a repository.
Unfortunately, though, you can't select any of the text in there; it looks like custom code which simply did not have that functionality implemented.
Is there a similar GUI revision tree viewer in which you can select text, and feels more like a KDE/Gnome/etc. tool?
It must be gratis and open source.