Comment 6 for bug 536953

Hey, we can get even better!!

class FactTree(gtk.TreeView):
[...]
    def __init__(self):
[...]
        try :
          _test_context = pixmap.cairo_create()
          self._test_layout = _test_context.create_layout()
          font = pango.FontDescription(gtk.Style().font_desc.to_string())
          self._test_layout.set_font_description(font)
        except :
          return

[...]

    def update_longest_dimensions(self, fact):
        interval = "%s -" % fact["start_time"].strftime("%H:%M")
        if fact["end_time"]:
            interval = "%s %s" % (interval, fact["end_time"].strftime("%H:%M"))

        try :
          self._test_layout.set_markup(interval)
          w, h = self._test_layout.get_pixel_size()
          self.longest_interval = max(self.longest_interval, w + 20)

          self._test_layout.set_markup("%s - <small>%s</small> " % (stuff.escape_pango(fact["name"]), stuff.escape_pango(fact["category"])))
          w, h = self._test_layout.get_pixel_size()
          self.longest_activity_category = max(self.longest_activity_category, w + 10)

          self._test_layout.set_markup("%s" % stuff.format_duration(fact["delta"]))
          w, h = self._test_layout.get_pixel_size()
          self.longest_duration = max(self.longest_duration, w)

        except :
          w = 0
          h = 0
          self.longest_interval = max(self.longest_interval, w + 120)
          self.longest_activity_category = max(self.longest_activity_category, w + 70)
          self.longest_duration = max(self.longest_duration, w)