+ clear_selection();
+
+ if (mouse_down_item_) {
+ mouse_down_item_->select();
+ mouse_down_item_->drag();
+ }
+
+ selection_changed();
+ }
+}
+
+void Ruler::mouseReleaseEvent(QMouseEvent *)
+{
+ using pv::widgets::Popup;
+
+ if (!dragging_ && mouse_down_item_) {
+ Popup *const p = mouse_down_item_->create_popup(&view_);
+ if (p) {
+ const QPoint arrpos(mouse_down_item_->get_x(),
+ height() - ViewItem::HighlightRadius);
+ p->set_position(mapToGlobal(arrpos), Popup::Bottom);
+ p->show();
+ }
+ }
+
+ dragging_ = false;
+ mouse_down_item_.reset();
+
+ const vector< shared_ptr<TimeItem> > items(view_.time_items());
+ for (auto &i : items)
+ i->drag_release();
+}
+
+void Ruler::leaveEvent(QEvent*)
+{
+ mouse_point_ = QPoint(-1, -1);
+ update();
+}
+
+void Ruler::mouseDoubleClickEvent(QMouseEvent *e)
+{
+ view_.add_flag(view_.offset() + ((double)e->x() + 0.5) * view_.scale());
+}
+
+void Ruler::keyPressEvent(QKeyEvent *e)
+{
+ assert(e);
+
+ if (e->key() == Qt::Key_Delete)
+ {
+ const vector< shared_ptr<TimeItem> > items(view_.time_items());
+ for (auto &i : items)
+ if (i->selected())
+ i->delete_pressed();
+ }
+}
+
+void Ruler::draw_hover_mark(QPainter &p, int text_height)
+{
+ const int x = view_.hover_point().x();
+
+ if (x == -1)
+ return;
+
+ p.setPen(QPen(Qt::NoPen));
+ p.setBrush(QBrush(palette().color(foregroundRole())));
+
+ const int b = RulerHeight * text_height;
+ const float hover_arrow_size = HoverArrowSize * text_height;
+ const QPointF points[] = {
+ QPointF(x, b),
+ QPointF(x - hover_arrow_size, b - hover_arrow_size),
+ QPointF(x + hover_arrow_size, b - hover_arrow_size)
+ };
+ p.drawPolygon(points, countof(points));
+}
+
+int Ruler::calculate_text_height() const
+{
+ return QFontMetrics(font()).ascent();
+}
+
+void Ruler::hover_point_changed()
+{
+ update();