Qt Figure: allow displaying coordinates when hovered axes parent is a uipanel. * Canvas/cc (Canvas::canvasMouseMoveEvent): call "select_object" with the actual Canvas object which may also be a uipanel.

%!function r = f (x)
%!  if (ischar (x))
%!    r = x;
%!  else
%!    error ("expecting character string");
%!  endif
%!endfunction

%!assert (eval ("f 10;"), "10");