+ const int text_height = calculate_text_height();
+ return QSize(0, RulerHeight * text_height);
+}
+
+QSize Ruler::extended_size_hint() const
+{
+ QRectF max_rect;
+ std::vector< std::shared_ptr<TimeItem> > items(view_.time_items());
+ for (auto &i : items)
+ max_rect = max_rect.united(i->label_rect(QRect()));
+ return QSize(0, sizeHint().height() - max_rect.top() / 2 +
+ ViewItem::HighlightRadius);
+}
+
+vector< shared_ptr<ViewItem> > Ruler::items()
+{
+ const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
+ return vector< shared_ptr<ViewItem> >(
+ time_items.begin(), time_items.end());
+}
+
+shared_ptr<ViewItem> Ruler::get_mouse_over_item(const QPoint &pt)
+{
+ const vector< shared_ptr<TimeItem> > items(view_.time_items());
+ for (auto i = items.rbegin(); i != items.rend(); i++)
+ if ((*i)->enabled() && (*i)->label_rect(rect()).contains(pt))
+ return *i;
+ return nullptr;
+}
+
+void Ruler::paintEvent(QPaintEvent*)
+{
+ if (!tick_position_cache_) {
+ auto ffunc = [this](const pv::util::Timestamp& t)
+ {
+ return util::format_time(
+ t,
+ this->view_.tick_prefix(),
+ this->view_.time_unit(),
+ this->view_.tick_precision());
+ };
+
+ tick_position_cache_.emplace(calculate_tick_positions(
+ view_.tick_period(),
+ view_.offset(),
+ view_.scale(),
+ width(),
+ ffunc));
+ }
+
+ const int ValueMargin = 3;
+
+ const int text_height = calculate_text_height();
+ const int ruler_height = RulerHeight * text_height;
+ const int major_tick_y1 = text_height + ValueMargin * 2;
+ const int minor_tick_y1 = (major_tick_y1 + ruler_height) / 2;
+